1.           Poul Erik Hansen and Arne Berg, NMR Investigations on Pyrene. Acta Chem. Scand., 25 (1971) 3377-3387. http://actachemscand.dk/


2.           A. Berg, P. E. Hansen and H. J. Jakobsen, Sixteen 13C - 19F Spin-spin Coupling Constants in the 13C NMR Spectrum of 1-Flouropyrene.

              Acta Chem. Scand., 26 (1972) 2159-2161. http://actachemscand.dk/


3.           Poul Erik Hansen, Housemaid. A ten spin computer program including symmetry.

              Private Communication in TAMU Letters, August 1972.


4.           Poul Erik Hansen, 13C - 19F and 1H NMR Investigations of some Polycyclic Aromatic Hydrocarbons. Synthesis of 13C-Labelled Compounds.

              Licentiatafhandling, (Ph.D.), Aarhus Universitet 1973.


5.           P. E. Hansen, O. K. Poulsen and A. Berg, 13C - 13C Coup­ling Constants and Substituent Effects on 13C Chemical Shifts in 13C Labelled Pyrene and Pyrene Derivatives.

              Org. Magn. Reson., 7, (1975) 23-26.


6.         J. Feeney, P. E. Hansen and G. C. K. Roberts, The Use of 13C - 1H Spin-coupling Constants in the Determination of Sidechain Conformations of Aminoacids.

              Chem. Comm., (1974) 465-466.


7.           P. E. Hansen, J. Feeney and G. C. K. Roberts, Long-Range 13C - 1H Spin-Coupling Constants in Aminoacids. Conformational Applications.

              J. Magn. Reson., 17 (1975) 249-261.


8.         P. E. Hansen, O. K. Poulsen and A. Berg, Substituent Effects on 13C Coupling Constants and Chemical Shifts in 13C-Labelled Polycyclic Aromatic Hydroxy Compounds.

              Org. Magn. Reson., 7 (1975) 475-477.


9.           P. E. Hansen, O. K. Poulsen and A. Berg, Determination of Relative Signs of 13C - 13C Coupling Constants in Doubly Labelled Compound.

              Org. Magn. Reson., 7 (1975) 405-406.


10.       P. E. Hansen, O. K. Poulsen and A. Berg, 13C-13C Coupling Constants in Derivatives of tr-Stilbene and Tetrapheny­lethy­lene. Determination of Relative Signs. II.

              Org. Magn. Reson., 7 (1976) 632-637.


11.         P. E. Hansen and A. Berg, 13C - 13C Coupling Constants in Dimethyl Phthalate and Phthalic Anhydride. Determinations of signs. III.

              Org. Magn. Reson., 8 (1976) 591-597.


12.       P. E. Hansen and A. Berg, 13C - 13C Coupling Constants in Phenyl-substituted Ethylene, Naphtalene, Phenanthrene and Cydopentadienone. Dependence on Dihedral angles. Determi­na­tions of Signs by the Symmetrical Double Labelling Method. IV.

              Org. Magn. Reson.,, 8 (1976) 43-49.


13.       P. E. Hansen, O. K. Poulsen and A. Berg, 13C - 13C Coup­ling Constants in Aromatic Carbonyl Compounds. Effects of ortho and peri Interactions involving the Carbonyl Group.

              Org. Magn. Reson., 9 (1976) 649-658.


14.         P. E. Hansen, A. Berg and H. Lund, Cathodic t-butylation of Pyrene.

              Acta Chem. Scand., B30 (1976) 267-270.


15.       P. E. Hansen, A. Berg, H. J. Jacobsen, A. P. Manzara and J. Michl, 13C - 19F Spin-spin Coupling Constants in some Monofluoro-substituted Polycyclic Aromatic Hydrocarbons.

              Org. Magn. Reson., 10 (1977) 179-187.


16.         P. E. Hansen, J. C. Batchelor and J. Feeney, 13C Shiel­ding Effects at ã - Carbons in the Side - Chain Rotamers of - Aminoacids.

              JCS Perkin II, (1977) 50-54.


17.       P. E. Hansen, O. Blåbjerg and A. Berg, Dissolving Metal and Electrochemical Reduction of Plycyclic Aromatic Hydrocarbons. Pyrene and 2,7-Di-t-butylpyrene.

              Acta Chem. Scand., B32 (1978) 620-627. http://actachemscand.dk/


18.         P. E. Hansen, 13C - 13C Long Range Coupling Constants. A Review.

              Org. Magn. Reson., 9 (1978) 215-233.


19.         P. E. Hansen, H. Thiessen and R. Brodersen, Bilirubin Acidity. Titremetric and 13C NMR Studies.

              Acta Chem. Scand., B33 (1979) 281-293. http://actachemscand.dk/


20.       P. E. Hansen and A. Berg, 13C - 13C Coupling Constants in Anthracene, Dihydroanthracene and Phthalic Acid Derivati­ves. Determination of Signs by the Symmetrical Double Labelling (SDL) Method.

              Org. Magn. Reson., 12 (1979) 50-54.


21.         J. L. Marshall, L. G. Faehl, R. Kattner and P. E. Hansen, Substituent Conformational Effects in Vicinal Carbon-13-carbon-13 Spin Coupling Sonstants.

              Org. Magn. Reson., 12 (1979) 169-173.


22.         P. E. Hansen, 13C NMR of Polycyclic Aromatic Compounds.

              Org. Magn. Reson., 12 (1979) 109-142.



23.         P. E. Hansen and J. J. Led, CH, CD, CC and HH Coupling Constants in Isotopically Enriched Cyclobutene.

              Org. Magn. Reson., 15 (1981) 288-293.


24.         P. E. Hansen, Spin-spin Carbon-carbon Coupling Constants.

              Ann. Reports on NMR Spectroscopy, 11A (1981) 65-98.


25.         V. Wray and P. E. Hansen, Spin-spin Carbon-carbon Coup­ling Constants Data.

              Ann. Reports on NMR Spectroscopy, 11A (1981) 99-181.


26.         V. Wray and P. E. Hansen, One-bond Carbon-carbon Spin-spin Coupling Constants: A Data Summery.

              Org. Magn. Reson., 15 (1981) 102-103.


27.         P. E. Hansen and A. Berg, Infra Red Spectra of Pyrene Derivatives. Relation to Substitution Pattern.

              Acta Chem. Scand., B35 (1981) 131-137.


28.         P. E. Hansen, Carbon-hydrogen Coupling Constants, a review.

              Progress in Nuclear Magnetic Resonance Spectroscopy, 14 (1981) 175-296.


29.         P. E. Hansen and J.-P. Albrand, 13C - 13C Coupling Con­stants from 13C labelled Aromatic Compounds obtained by substitu­tion.

              Org. Magn. Reson., 17 (1981) 66-67.


30.         P. E. Hansen, F. Duus and P. Schmitt, Deuterium Isotope Effects on 13C Nuclear Shielding as a Measure of Tauto­meric Equilibria.

              Org. Magn. Reson., 18 (1982) 58-61.


31.         L. T. Scott, M. A. Kirms, A. Berg and P. E. Hansen, Automerization of Pyrene. A Test for the Mechanism of Naphthalene Automerization.

              Tetrahedron Lett., (1982) 1859-1862.


32.         P. E. Hansen, Isotope Effects on Nuclear Shielding, A Review.

              Ann. Reports on NMR Spectroscopy, 15 (1983) 106-231.


33.       J. H. Baldo, P. E. Hansen, J. W. Shriver and B. Sykes, 2-Fluoro ATP, a New Fluorinated ATP Analog. 19F NMR Studies of the 2-F-ADP. Myosin Subfragment - 1 Complex.

              Can. J. Biochem. Cell Biol., 61 (1983) 115-119.


34.       P. E. Hansen and A. Berg, Carbon-carbon Coupling Con­stants and 13Chemical Shifts of Aromatic and Olefinic Carbonyl Compounds. Comformational Orientation of the Carbonyl Group.

              Spectrosc. Int. J., 2 (1983) 1-21.


35.       F. Duus and P. E. Hansen, Determination of Tautomeric Phenotype of â - Thioxo Esters and Characterization of the Tautomeric Enethiolic Constituents by Means of 13C NMR Spectroscopy.

              Org. Magn. Reson., 22 (1984) 16-23.


36.       N. J. Koole, M. J. A. de Bie and P. E. Hansen, Carbon Proton Coupling Constants in Allenes, Ethenes and Bu­tatrienes. Application to Conformational Analysis of Allenyl and Vinyl Alkyl Ethers and Thioethers.

              Org. Magn. Reson., 22 (1984) 146-163.


37.         A. Lycka and P. E. Hansen, Deuterium Isotope Effects on 13C and 15N Nuclear Shielding of o-Hydroxyazo Dyes.

              Org. Magn. Reson., 22 (1984) 569-571.


38.         P. E. Hansen and H. J. Jakobsen, 15N NMR Investigation of Bilirubin IX.

              Org. Magn. Reson., 22 (1984) 668-670.


39.         Poul Erik Hansen, NMR of Polycyclic Aromati­cs,

              Magn. Reson. Review, 10 (19­85) 1‑44.


40.         A. Lycka and P. E. Hansen, Deuterium Isotope Effects o­n 14N and 15N Nuclear Shielding in Simple Nitrogen Contai­ning Com­pounds,

              Magn. Reson. Chem., 23 (1985) 973‑976.


41.       P. E. Hansen, H. D. Dettman and B. D. Sykes, Solvent Induced Deuterium Isotope Effects on 19F Chemical Shifts of some substituted Fluorobenzenes. Formation of Inclu­sion Complexes.

               J. Magn. R­eson., 62 (1985) 487‑496.


42.       P. E. Hansen, F. M. Nicolaisen and K. Schaumburg, Deu­terium­isotope Effects on Nuclear Shielding. Directional Effects and non‑additivity in Acyl‑derivatives.

              J. Am. Chem. Soc., 108 (198­6) 625‑629.


43.       P. E. Hansen, Deuterium Isotope Effects on 13C Nuclear Shiel­ding of Intra‑molecular Hydrogenbonded Systems, Magn. Reson. Chem­., 24 (1986) 903‑910.


44.         P. E. Hansen and A. Lycka, Carbon‑carbon Coupling Const­ants of 1‑Phenylazo‑2‑naphthol and 2‑Phenylazo‑1‑naph­thol. Use of SEMINA Technique.

              Magn. Reson­. Chem., 24 (19­86) 772‑776.


45.       A. Berg, J. Lam and P. E. Hansen, sec. Alkyl­pyrenes and ‑ hyd­ropyrenes. Formation by Friedel Crafts, Cathodic Alkyla­tion, and Catalytic Hydrogenation Procedures. Structure Deter­mina­tion and Spectroscopic Properties. Acta Chem.Scand., B40 (19­86) 665‑677. http://actachemscand.dk/


46.         P. E. Hansen, A. Berg and K. Schaumburg, Carbon‑carbon,

   nJ(C = O,C) and Carbon‑fluorine Coupling Constants, n­­J(C,F), of o ‑ substituted Benzoic Acids and Acid Fluor­ides. INDO SOS Calcula­tions and Evaluation of Rota­tional Effects.

              Magn. Reson­. Chem., 25 (1987) 508‑513.


47.       P. E. Hansen, Isotope Effects on Nuclear Shielding as a Means of Studying Solute ‑ solvent Interactions. In "Interactions of Water in Ionic and Nonionic Hydrates", ed. H. Kleeberg, Springer, Berlin, (1987) 77-80.



48.       P. E. Hansen, Does an OH or an OD group form the stron­gest hydrogen bond to Oxygen, In "Interaction of Water in Ionic and No­nionic Hydrates", ed. H. Kleeberg,

              Springer, Berlin, (1987) 287-289.



49.       E. Tüchsen and P. E. Hansen, Resonance Assignment of the Car­b­onyl 13C NMR Spectrum of Basic Pancreatic Trypsin Inhibi­tor by Selecti­ve Hydrogen Isotope Labelling and Isotope Ef­fects on Nuclear Shiel­ding.

              Biochemistry, 27 (1988) 8568‑8576.


50.         P. E. Hansen, Deuterium Isotope Effects on Nuclear Shiel­ding.

              Progress in NMR Spectrosc., 20 (1988) 207-257.


51.         P. E. Hansen, Isotopic Pertubation of Equilibrium in 2,6‑Di­hy­droxy Ben­zoyl Compounds.

              Acta Chem. Scand., B42 (1­988) 423‑432. http://actachemscand.dk/


52.       P. E. Hansen and A. Lycka, A Reinvestigation of One‑b­ond Deuterium Isotope Effects on Nitrogen and on Proton Nuclear  Shielding for the Ammonium Ion.

              Acta Chem. Scand.­, 43 (1989) 222-232.http://actachemscand.dk/


53.         A. Lycka, J. Jirman and P. E. Hansen, Two‑dimensional 1H and 13H NMR Spectra of Some Azo Dyes Containing Amino or Acetami­no Groups.

              Dyes and Pigments, 10 (1989) 259-268.


54.         P. E. Hansen, NMR of C=C, C=O, C=N and N=N Double bonds.

              In The Chemistry of Double bonded Functional Groups­,ed. S. Patai, Wiley, New York, (1989) 81-162


55.       P. E. Hansen and E. Tüchsen, Deuterium Isotope Ef­fects on Carbonyl Chemical Shifts of BPTI. Hydrogen‑bonding and Struc­ture Determination in Proteins.

               Acta Chem. Scand­., 43 (1989) 710-712.http://actachemscand.dk/


56.       P. E. Hansen, R. Kawecki, A. Krowczynski and L. Kozers­ki, Deut­erium Isotope Effects on 13C and 15N Nucl­ear Sh­iel­ding in Intramoleculary Hydrogen‑bonded Compounds. II. Inves­ti­gation of Enamine Derivatives.

               Acta Chem. Scand., 44 (1990) 826-832. http://actachemscand.dk/


57.         U. Skibsted and P. E. Hansen, 1H NMR Spin-echo Spect­ros­copy of Erythrocytes. Transformation of Exogenous Com­pounds.

              NMR in Biomed., 3 (1990) 248-258.


58.       E. Tüchsen and P. E. Hansen, Hydrogen Bonding Monitored by Deuterium Isotope Effects on Carbonyl 13C Chemical Shifts in Basic Pancreatic Trypsin Inhibitor. Intra Residue Hydrogen Bonds in Antiparallel ß-sheet.

               Int. J. Biol. Macromolecules, 13 (1991) 2-8.


59.         P. E. Hansen, U. Skibsted and F. Duus, Long-range Deu­terium Isotope Effects in Tautomeric ß-Thioxoketones. A 1H and 13C NMR Study.

               J. Phys. Org. Chem., 4 (1991) 225-232.


60.         L. Kozerski and P. E. Hansen, Aggregation of Amphiphilic molecules in water. I. L-Phenylethylamine; 1H and 13C NMR Study.

              J. Phys. Org. Chem., 4 (1991) 58-66.


61.       P. E. Hansen, Assignment of the Natural Abun­dan­ce 13C Spec­trum of Proteins using 13C 1H Detec­ted Hete­ro­nuclear Multiple Bond Cor­relation NMR Spectrosco­py. Struc­tural     Infor­mation and Stero­speci­fic Assign­ment from Two- and Three-Bond Carbon-hydrogen Coup­ling Con­stants.

             ­Biochemi­stry 30 (1991) 10457-66.


62.       K. Laali and P. E. Hansen, Protonation (Sulfinylation) of Isomeric Isopropylpyrenes, 2,7-Di-tert-Butylpyrene, Tetra­cyclohexyl-and Tetracylopenytylpyrenes; Remarkably Stable, Sterically Crowded Pyreniun Cations.

               J. Org. Chem., 56 (1991) 6795-6803.


63.       C. Lauritzen, E. Tüchsen, P. E. Hansen and O. Skov­gaard, BPTI and N-Terminal Extended Analogues Generated by Factor Xa Cleavage and Cathepsin C trimming of a Fusion Protein Expressed in Eschericia coli..

                Protein Expres. Purif. 2 (1991) 372-78.


64.       P. E. Hansen, A. Kolonicny and A. Lycka, Deuterium Isoto­pe Ef­fects on 13C Nuclear Shielding of Amino and Acetami­do Com­pounds. Tautomerism and Intramolecular Hydrogen-bon­ding.

               Magn. Reson. Chem., 30 (1992) 786-96.


65.       K. Laali, T.-Z. Miang and P. E. Hansen, Nitration of Isopro­pyl­ pyrenes; Strained Models for Protonation and Trans­fer Nitra­tion in the Condensed Phase.

              J. Org. ­Chem., 57 (1992) 2658-67.


66.       P. E. Hansen, Nuclear Magnetic Resonance (NMR) of Acids    and Acid Derivatives. In The Chemistry of Acid Der­ivati­     ves,  Vol. 2, Suppl. B2, Ed. S.Patai, Wiley, New York, p.153-226 (1992).


67.       P. E. Hansen, W. R. Kem and R. S. Norton, NMR Study of     Neurotoxin B-IV from the Marine Worm Cerebratulus lacteus: Sequence - Specific Assign­ments, Secondary Struc­     ture and Global Fold.

              Eur. J. Biochem., 210 (1992) 231-240.


68.       M. Munch, Aa. E. Hansen, P. E. Hansen and T. D. Bouman, Ab-Initio Calculations of Deuterium isotope Ef­fects on hydrogen and Nitrogen nuclear Magnetic Shielding in the hydrated Ammo­nium Ion.

              Acta Chem. Scand., 46 (1992) 1065-1071. http://actachemscand.dk/



69.       C. Lauritzen, O. Skovgaard, P. E. Hansen, and E. Tüchsen, Effects of N-terminal Extension Peptides on the Stucture  and Stability of Bovine Pancreatic Trypsin Inhibi­tor Studied by 1H NMR.     

              Int. J. Biol. Macromol.,  (1992) 326-332.


70.       P. E. Hansen, Substituent Effects on Deuterium Isotope Effects on Nuclear Shielding.  Intra-molecular Hydrogen- bonded Ketones, Aldehydes and Esters.

              Magn. Reson. Chem. 31 (1993) 27-37.


71.       P. E. Hansen, Long-range Isotope Effects in Hydrogen-bonded Compounds. Purpurogallins.

              Magn. Reson. Chem., 31 (1993) 71-74.


72.       P. E. Hansen, Aa. E. Hansen, A. Lycka and A. Buvari-Barc­za, 2ÄH(D) and 1ÄN(D) Isotope Effects on Nuclear Shiel­ding of Ammonium Ions in Complexes with Crown ethers and Cryp­tands.­

              Acta Chem.Scand., 47 (1993) 777-788. http://actachemscand.dk/


73.       P. E. Hansen, M. Christoffersen and S. Bolvig, Variable­Tem­perature NMR Studies of 2,6-dihydroxy Acylaromatic Com­pounds. Deuterium Isotope Effects on Chemical Shifts, Isotopic Pertur­bation of Equilibrium and Barriers to Rota­tion.

              Magn. Reson. Chem., 31 (1993) 893-902.


74.       K. K. Laali, P. E. Hansen, E. Gelerinter and J. J. Hou­ser, Oxidation of Sterically Crowded Alkyl (cycloalkyl)­pyrenes. Persi­stent Dications in SbF5/SO2ClF and Radical Cations in FSO3H/­SO2.

              J.Org.Chem., 58 (1993) 4088-4095.


75.       K. K. Laali and P. E. Hansen, Generation and NMR Studies of Persistent Fluoro (alkyl) Pyrenium Ions and their Tetrahydro-and Hexahydro- Drivatives in Supracid Media.

              J.Org.Chem., 58 (1993) 4096-4104.


76.         P. E. Hansen, Hydrogen-bonding and Tautomerism studied by Isotope Effects on Chemical Shifts.

              J.Mol.Struct., 321 (1994) 79-87.


77.       P. E. Hansen, T. Kristensen, S. Christensen and S. Bol­vig, Deuterium and 18O Isotope Effects on 13C Chemical Shifts of Sterically hindered and/ or Intra-molecu­larly Hydro­gen-bonded o-Hydroxy Acyl Aromatics.

              Magn.Reson.Chem., 32 (1994) 399-408.


78.         J. Abildgaard, P. E. Hansen, J. Josephsen and A. Lycka

              Assignment of the Ligating Nitrogen in o,o'-Dihydroxy-Diaryl-Complexes of Nickel, Palladium- and Platinum(II) by 1H and 13C NMR Spectroscopy. 

              Inorganic Chem., 33 (1994) 5271 - 5277.


79.         L. Kozerski, R. Kawecki and P. E. Hansen, Data for ­Cha­racterization of the Geometrical Isomers of â-Sulfinyle­namines.

                            Magn.Reson.Chem., 32 (1994) 517-524.


80.       K. K. Laali and P. E. Hansen, 13C, 1H and Two-dimensional NMR studies of Charge Distribution in Sterically Conge­sted Persi­stent Cycloalkyl and Alkylpyrenium Ions Genera­ted by Protona­tion in Superacid Media.

              J.C.S. Perkin Trans 2, (1994) 2249-2258.


81.       P. E. Hansen, J. Abildgaard and Aa. E. Hansen, Ab Initio Calculations of External Charge Effects on the Isotro­pic 13C, 15N and 17O Nuclear Shieldings of Amides.

              Chemical Phys.Lett., 224 (1994) 275-282.


82.       P. E. Hansen, S. Bolvig and Th. Kappe, Intramolecular Hydrogen Bonding and Tautomerism of Acyl Pyran-2,4-dio­nes, 2,4,6-Triones and Pyridio­nes and Benzanne­lated Der­ivati­ves.  Deuterium Isotope Ef­fects on 13C NMR Chemi­cal S­hifts.

              J.C.S. Perkin Trans. 2, (1995) 1901 - 1907.


83.       K. K. Laali, P. E. Hansen, J. J. Houser and M. Zander, Protonation of Benzo[a]pyrene, Dibenzo[a,e]pyrene and Benzo[e]­pyrene in Superacids: NMR Studies of Char­ge Distribu­tion in the Persistent Arenium Ions and AM1 Calcula­tions.

              J.C.S. Perkin Trans. 2, (1995) 1781 - 1790.


84.       P. E. Hansen, S. Bolvig, F. Duus, M. V. Petrova, R. Kawecki and L. Kozerski, Deuterium Isotope Effects on 13C Chemical Shifts of Intramolecularly Hydrogen-bonded Olefins.

              Magn.Reson.Chem., 33 (1995) 621-631.


85.       K. K. Laali, S. Bolvig and P. E. Hansen, Mono- and Di­nitro-alkyl(cycloalkyl)pyre­nes in Superacid Me­dia: Dihy­droxyiminium-(Oxo-imi­nium)­pyrenium Dica­tions; cyclization to Long-lived Oxazoli­ne- (and 1,2-oxazi­ne-)pyrenium Ions, ring Opening to Nitrosoal­kyl­pyrenium and Nitroso Radical Ca­tion Salts with Un­precedented Stabili­ty.

              J.C.S. Perkin Trans. 2, (1995) 537-551.


86.       L. Kozerski, R. Kawecki, P. Krajewski, P. Gluzinski, K. Pupek, P. E. Hansen and M. Williamson, Searching Confor­mational Space in flexible Molecules using NOE Effects and Molecular Modelling.

              J.Org.Chem., 60 (1995) 3533-3538.


87.         P. E. Hansen, Isotope Effects on Chemical Shifts as a Tool in Structural Studies.

              Doctoral Thesis. University of Roskilde (1996).


88.       J. R. Powell, S. Pandey, B. J. Miller, W. E. Acree, P. E. Hansen and J. C. Fetzer, Polycyclic Aromatic Hydrocarbon Probes. Part XII. Dissimilar Fluorescence Excitation/E­mission Behaviour between Alkylpyrene and Alkylcoronene Derivatives and the Parent PAH Molecule.

              J.Lumin. 69 (1996) 27 -34.




89.       P.E.Hansen, F.  Duus, S. Bolvig and T. S. Jagodzin­ski,  Intra-molecular Hydrogen Bon­ding of the Enol forms of â-Ketoa­mides and â-Ke­tot­hioami­des.  Deu­terium Isotope Ef­fects on 13C Chemical Shifts.

              J.Mol.Struct. 378 (1996) 45 - 59.


90.         S. Bolvig and  P. E. Hansen, Deuterium Isotope Effects on               13C Chemical Shifts as a Probe for Tautomerism in Enolic                â-Diketones.

              Magn.Reson.Chem. 34 (1996) 467 - 478.


  91.     J. G. Sosnicki, T. S. Jagodzinski, B. Nowak-Wydra and P. E. Hansen, Complete Assignment of 1H and 13C NMR Spectra and Con­formational Analysis of Thioamide Cannabinoids.

              Magn.Reson.Chem. 34 (1996) 667 - 674.


92.       K. K. Laali and P. E. Hansen, Mono- and diprotonation of Dihydropyrene and 2,7-di-tert-Butylpyrene and their conversion to Pyrenium ions; influence of the Radical Cation and its Poten­tial utility in NMR Assignments of the Arenium Ions of readily oxidizable PAHs.

            Res.Chem. Interm.  22 (1996) 737-751.


93. T. Nielsen, K. Siigur, S. Helweg, O. Jørgensen, P. E. ­Hansen and U.Kirso ,Sorption of Polycyclic Aro­ma­tic compounds to Humic Acid studied by Applying              High Performance Liquid Chromatography

              Environm.Sci.Technol. 31 (1997) 1102-1108.


94.         C. Helweg, T. Nielsen and P. E. Hansen, QSPRs compared with HPLC experiments for the estimation of Kow for N-PACs.

  QSAR in Environmental Sciences, VII., F. Chen and G. Schüürmann, eds. Chap. 12 p. 173-184 (1997).


95.         P. E. Hansen and S. Bolvig,  Deuterium Isotope Effects on 13C Chemical Shifts of o-Hydroxy Acyl Aroma­tics. Intra­molecular hydrogen-bonding.

              Magn.Reson.Chem. 35 (1997) 520-528.


     96.  C. Helweg, T. Nielsen and P. E. Hansen, Determination of Octanol-water Partition Coeffecients of Polar Polycyclic Aromatic Compounds (N-PAC) by High Performance Liquid Chromato­graphy.

              Chemosphere 34 (1997) 1673-1687.


97.         C. Helweg, T. Nielsen and P. E. Hansen, Determination of Kow of substituted polycyclic aromatic compounds.

              Polycyclic Aromatic Hydrocarbons, 12 (1997) 187-200.


98.       K. K. Laali, S. Hollenstein, R. G. Harvey and P. E. Han­sen, Stable Ion Studies of the Chrysene Skeleton: Pro­tonation of Chrysene, 6-Halochrysene (F,Cl,Br), 6-Acetyl­chrysene and 4H-Cyclopenta[def]chrysene: NMR Studies of Charge Distribution in Chrysenium Cations and AM1 Cal­culations.

              J.Org. Chem. 62 (1997) 4023-4028.


99.         P. E. Hansen, S. Bolvig, A. Buvari-Barzca and A. Lycka, Deuterium Isotope Effects on 19F Chemical Shifts.

              Acta Chem.Scand., 51 (1997) 881-888.


100.     K. K. Laali and P. E. Hansen, Charge Delocalization Path­ways in Persistent 1-, 2- and 4-Pyrenyl-methyl­carbenium ions as Models of PAH-Epoxide Ring Ope­ning; NMR Studies in Superacids and AM1 Calcula­tions.

              J.Org.Chem.  62 (1997) 5804-5810.


101.     K. K. Laali, S. Hollenstein and P. E. Hansen, Probing the Charge Delocalization Mode in Methyl, Dimethyl and Methy­lene-Bridged Phenanth­renium Ions.  NMR Studies of Persi­stent Monon and Dications and AM1 Calculations.

              J.C.S.Perkin II (1997) 2207-2213.


102.     T. Dziembowska, A. Rozwadowski and P. E. Hansen, Intramo­lecular Hydrogenbonding of 8-Hydroxyquinoli­ne N-oxides, Quinal­dinic Acid N-oxides and Quinal­dinami­de N-oxide. Deuterium Isotope Effects on 13C Chemi­cal Shifts.

              J.Mol.Struct.  436-437 (1997) 189-199.


103.       D. Kh. Zheglova, D. G. Genov, S. Bolvig and P. E. Hansen, Deuterium Isotope Effects on 13C Chemical Shifts of Enaminones.

              Acta Chem.Scand., 51 (1997) 1016-1023.


104.     S. Bolvig, F. Duus and P. E. Hansen, Tautomerism of Eno­lic 2-Ac­yl­di­me­do­ne­s, Meldrum and N,N-dimethyl­barbi­turic Acids by means of Deuterium Isotope Effects on 13C Chemi­cal Shifts. 

              Magn.Reson.Chem. 36 (1998) 315-324.


105.     P. E. Hansen, W. Zhang, C. Lauritzen, S. Bjørn, L. C. Peter­sen, K. Norris, O. H. Olsen and Chr. Betzel,­­­­­­­­­­­­­­­­ 13C NMR, X-ray and Dif­ferential Scanning Calori­metry Investi­ga­tions of Trun­cated BPTI Mutants.  Salt Bridge for­ma­tion.

              Biochemistry  37 (1998) 3545-53.


106.       E. V. Borisov, W. Zhang, S. Bolvig and P. E. ­Hansen, nJ(C,­OH) Coupling Constants of Intramolecular­ly Hydro­gen Bonded Compounds.

              Magn.Reson.Chem. 36 (1998) S104-110.


107.       P. E. Hansen, M. Langgård and S. Bolvig, Isoto­pe Effects on Chemical Shift in Tautomeric Systems­ with Double­ Proton transfer.  Citrinin.

              Polish J.Chem. 72 (1998) 269-276.


108.     P. E. Hansen, J. Spanget-Larsen and K. K. Laali, Confor­ma­ti­o­nal St­u­di­es of Triaryl (Phenyl and 1-Pyrenyl) Met­hyl Carbenium Ions: Semiempirical Calculations and NMR In­vestiga­tions under stable Ion Conditions. 

              J.Org.Chem., 63 (1998) 1827-35.


109.       P. E. Hansen, Z. Rozwadowski, T. Dziembowska; One Bond Deu­terium Isotope Effects on 15N Chemical Shifts, 1ÄN(D), in Schiff Bases.

              Berichte Bunsengesel Chem.Phys., 102 (1998) 410-13.


110.  L. Kozerski, R. Kawecki, P. Krajewski, B. Kwiecien, D. W. Boykin, S. Bolvig and P. E. Hansen, 17O Chemical Shifts of Intramolecularly Hydrogen Bonded Compounds.

              Magn.Reson.Chem., 36 (1998) 921-928.


  111.   K. K. Laali and P. E. Hansen, Futher Insigth into the Reactive Intermediates formed by Superacids protonation of Crowded Nitro-PAHs: Persistent Dihydroxy-iminium-Pyrenium and Hydroxy-iminium-Pyreneium Dications.

              J.C.S. Perkin Trans 2, (1998) 1167-72.


112.     J. Abildgaard, S. Bolvig and P.E. Hansen,  Un­ravelling the Electronic, Steric and Vibrational Contributions to Deu­terium Isotope Effects on 13C Chem­cial Shifts by ab initio Model Cal­culations.  Intra­mole­cu­lar Hydrogen ­bonded o-Hydroxy Acyl Aromatics.

              J.Am.Chem.Soc.  120 (1998) 9063-9069.


113.       K. K. Laali, M. Tanaka and P. E. Hansen, First Examples

  Of Fluorinated and Chlorinated Polycyclic Aromatic hydro­carbons (PAH) Dications from Benzo[a]pyrene, Pyrene and their Alkyl-Substituted Derivatives.

              J.Org.Chem.  63 (1998) 8217-8223.


114.     Z. Rozwadowski, E. Majewski, T. Dziembowska and P. E.­Hansen, Deuterium isotope Effects on 13C Chemical Shifts­ of In­tra­molecularly Hydrogenbonded Schiffs Bases.

              J.C.S. Perkin Trans 2  (1999) 2809-2818.


115.     S. Bolvig, P. E. Hansen, D. Wemmer and P. Williams,      Deuterium Isotope Effects on 17O Chemical Shifts of Intra­molecularly Hydrogen Bonded Systems.

              J.Mol.Struct. 509 (1999) 171-181.


116.       S. Bolvig and P. E. Hansen, Isotope Effects on chemical shifts as an analytical tool in structural studies of intramolecularly hydrogenbonded compounds. 

              Current Org. Chem. 4 (2000) 19-54.



117.       B. Andresen, F. Duus, S. Bolvig and P. E. Hansen,

  Variable Temperature 1H and 13C NMR Spectroscopic Investi­gation of the Enol-Enethiol tautomerism of β-Thioxoketo­nes.  Isotope Effects due to Deuteron Chelation.

              J.Mol.Struct. 552 (2000) 45-63.


118.     S. Bolvig, P. E. Hansen, H. Morimoto, D. Wemmer and P. Williams, Primary Tritium and Deuterium Isotope Effects on Chemical Shifts of Compounds having an Intramolecular Hydrogen bond.

              Magn.Reson Chem.  38 (2000) 525-535


119.       P. E. Hansen, Isotope Effects on Chemical Shifts of Pro­teins and Peptides. Review. 

              Magn.Reson.Chem.  38 (2000) 1-10.


 120.    P.E. Hansen, F. Duus, R. Neumann, T.S. Jagodzinski, D­eu­te­ri­um Isotope Effects of o-Hydroxythioamides, 2Ä-thiazo­li­nes and 5-Acyl-2-thiobarbituric acids.

              Polish. J. Chem. 74 (2000) 409-420.


121.     N. Rasmussen, D. Lloyd, R.G. Ratcliffe, P.E. Hansen and I. Ja­ko­b­se­n, 31P NMR for the Study of P me­ta­bo­li­sm and tr­ans­lo­ca­ti­on in ar­bu­sc­u­lar my­co­rr­hi­zal fu­n­gi.

              Plant Soil, 226 (2000) 245-253.


122.       W. Zhang, M.G. Hinds, G. Anderluh, P.E. Hansen and R.S. Norton, Sequence-specific resonance assignment of the potent cytolysin Equinatoxin II,

              J.Biomol. NMR.  18 (2000) 281-282.


123.     J. Abildgaard and P. E. Hansen,  Quantum Mechanical Model        Calculations in Chemistry: Structure, Vibrations, Chemi­cal Shifts and Isotope Effects on Chemical Shifts.

              Polish Chem. News 54 (2000) 846-887.


124.     K.K. Laali, T. Okazaki and P.E. Hansen, Stable Ion Study of Regioisomeric Caboxonium-Substituted Pyrenium Ions; Directive Effects, Charge Delocalization Mode and Confor­mational Aspects.

              J.Org. Chem. 65 (2000) 3816-3828.



125.     W. Kozminski, E. Bednarek, W.Bocian, J.Sitkowski,P.E.Hansen, B.Kwiecien and L. Kozerski, application of HECADE method to the measurement of long-range heteronuclear 13C, 1H spin-spin coupling constants in tautomeric β-sulfonyl enamines.

            Magn.Reson.Chem.  38 (2000) 839-844.


126.        L. Carlsen, M. Thomsen, S. Dobel, P. Lassen, B.B. Mogensen and P.E. Hansen, The interaction between esfenvalerate and humic substances of different origin.

             Humic Substances.  Versatile components of plants, soil and water. E.A.Ghabour and G.Davies eds. Royal society of Chemistry, Special Pub no. 259 (2000) 177-189



127.       W.Ziechman, M. Hübner, K.E.N. Jonassen, W.Batsberg, T.Nielsen, S.Hahner, P.E.Hansen and A.-L. Gudmundsson, Humic Substances and Humification.

  Humic Substances.  Versatile components of plants, soil and wateer. E.A.Ghabour and G.Davies eds. Royal society of Chemistry, Special Pub no. 259,       (2000) 9-20


128.       P. E. Hansen, U. Skibsted, J. Nissen, C. D. Rae and P.W.Ku­ch­el, 1H NMR of                          Compounds with low Wa­ter So­lu­bi­li­ty in the Pr­e­se­nce of Er­yt­hro­cy­te­s.  Ef­fe­cts of
       Em­ul­si­on Phase Se­pa­ra­ti­on.
              Eur.Biophysics J.  30 (2001) 69-74.
  129.   K. Kollist-Siigur, T. Nielsen, C. Grøn, P. E. Hansen,C. Helweg, K.E.N. Jonassen, O. Jørgensen and U.­Kirso, Sorption of P­olycyclic Aroma­tic Compounds to Humic and Fulvic Acid HPLC Column Ma­terials. 
              J.Environm.Qual. 30 (2001) 526-537.
130.     L. Kozerski, A. P. Mazurek, R. Kawecki, P. Krajewski, E. Bed­narek, J. Sitkowski,       M. P. Williamson, A. J. G. Moir and P. E.­ Hansen.  Gapped duplex decamer DNA       with PEG6 tether
              Nucleic Acid Res. 29 (2001) 1132-43.

131.       A. Wesolowska, T. Jagodzinski,  J.G. Sosnicki and P.E. Hansen, Synthesis of the N-   Allythioamide Derivatives of cyclic oxo- and ioxo acids and their cyclization to the    derivatives of 4,5-Dihydrothiazole.
               Polish J. Chem. 75 (2001) 387-400

132. T. Dziembowska, Z.Rozwadowski, S.Filarowski and P.E.Hansen, A multinuclear NMR study of proton transfer equilibrium in Schiff bases derived from 2-hydroxy-1-naphtaldehyde.  Deuterium isotope effects on 13C and 15N chemical shifts.  Magn.Reson.Chem. 39 (2001) S67-80.

133. J.G. Sosnicki, T.S. Jagodzinski and P.E. Hansen, Reactivity and Diastereoselectivity of Michael Additions of Amines to Achiral a,b-Unsaturated Thioamides.

               Tetrahedron57 (2001) 8705-18134. A.Posokhov, A.Gorsky, J.Spanget-Larsen, F.Duus, P.E. Hansen and J.Waluk, The Structure of the Phototransformation product in monothiodibenzoylmethane

              Chem. Phys. Lett. 350 (2001) 502-8.
135.       P. E. Hansen, Intrinsic Deuterium Isotope Effects on Chemical Shifts
Nukleonika 47 (2002) S37-S42.

136.       M.G.Hinds, W.Zhang, G. Anderluh, P.E.Hansen and R.S.Norton, Solution Structure  of  the eucaryotic pore-forming cytolysin equinatoxin II: Implications for pore                          formation,
              J.Mol. Biol. 315 (2002) 1219-29.    

  137.     L. Kozerski, B. Kwiecien, P. Krajewski, R. Kawecki, E. Bed­narek, J. Sitkowski, W. Bocian, W. Kozminski and P.E. Hansen. The tautomeric Equilibrium and Stereochemi­stry of a-s­ul­fo­ny­le­na­mi­nes
              New J.Chem26 (2002) 1060-69.

138.       E.Grech, J.Klimkiewich, J.Nowicka-Scheibe, M.Piertzak, W.Schilff, A.F.Pozharski, S.Bolvig, J.Abildgaard and P.E.Hansen, Deuterium Isotope Effects on 15N, 13C and 1H Chemical Shifts of Proton Sponges.
              J.Mol.Struct. 615 (2002) 121-140.
139.       L.Carlsen, M.Thomsen, S.Dobel, P.Lassen, B.B.Mogensen and P.E.Hansen, Reverse     quantitative structure-activity relationship (QSAR) for modelling
              the sorption of esfenvalerate to dissolved organic matter (DOM). A multivariate approach.
              Chemosphere, 49 (2002) 1317-1325.

140.      M.Thomsen,  P.Lassen, S.Dobel, P.E.Hansen, L.Carlsen and B.B.Mogensen.                            Characterisation of humic substances of different origin: a multivariate approach for                 quantifying the latent properties of dissolved organic matter.          .
              Chemosphere, 49 (2002) 1327-1337.

141.      A.M.Scharff, H.Egsgaard, P.E.Hansen and L.Rosendahl, Exploring Symbiotic   Nitrogen Fixation and Assimilation in Pea Root Nodules by in vivo 15N NMR           Spectroscopy and LC-Mass Spectroscopy.
              Plant Physiol. 131 (2003) 367-78.

142.      P.E. Hansen and J.Spanget-Larsen, NMR and IR Spectroscopy of Phenols.   In   Phenols ed. By Z. Rapporport, p. 333-393 Wiley (2003)

143.      L.Kozerski, S.Urbanczyk-Lipkowska, K.Kamienski, W.Bocian, E.Bednarek,  J.Sitkowski, K.Zakrewska, K.T.Nielsen and P.E.Hansen, Solution and solid state 13C               NMR and X-ray studies of Genistein complexes with amines.  Potential biological  function of the C-7, C-5, C-4’-OH groups. .
      Org.Biomol.Chem.  1 (2003) 3578-3585.

144.     K.E.N. Jonassen, T. Nielsen and P.E. Hansen, The application of HPLC humic acid                 columns in determination of KOC of polycyclic aromatic compounds (PAC)
            Env. Toxicol. Chem. 22 (2003) 741-45.

145.    P.W.Kuchel, B.E.Chapman, W.A.Bubb,  P.E.Hansen, C.J.Durrant and M.P.Herzberg,              Magnetic Susceptibility: Solutions, Emulsions and Cells,
              Concepts NMR18A (2003) 56-71.
146.    T.Rohrlack, K.Christoffersen, P.E.Hansen, W.Zhang, O.Czaarcki, M. Henning,    J.Fastner, B.A.Neilan and M.Kaebernick, Isolation, characterization and quantitative      analysis of microviridin J, a new Micorsystis  metabolite toxic to Daphnia
J.Chem. Ecology,  29 (2003) 1757-70.

147. P.E.Hansen, One-bond C-H Coupling Constants of Acetyl Groups as Possible                           Monitors of CH Hydrogen Bonds and Electric Field Effects
       Polish J. Chem. 77 (2003) 1683-91. 

148.    Y.Posokhov, A.Gorsky, J.Spanget-Larsen, F.Duus, P.E.Hansen and J.Waluk,                             Thioacetylacetone: Structural and vibrational assignments.
      Chem. Phys. Chem.  5 (2004) 495-502.

149.     N.Rasmussen, P.E.Hansen and I.Jakobsen, Phosphate pools in an arbuscular                             mycorrhizal fungus, Glomus intraradices, studied by 31P NMR spectroscopy
      New Phytol.  162 (2004) 783-94.

150.     C.B.Nielsen, M.Petersen, E.B.Pedersen, P.E.Hansen and U.F.Christensen, Structure                  determination of a Modified DNA Oligonucleotide Containing a New Intercalating                  Nucleic Acid.
              Bioconj. Chem. 15 (2004) 260-69.

151.      P.E.Hansen and A. Filarowski, Characterisation of the PT-form of o-Hydroxy                            Acylaromatic Schiff bases by NMR Spectroscopy and DFT Calculations.
J.Mol.Struct. 707 (2004) 69-75.

152.     A. Filarowski, A. Koll, A. Kochel, J.Kalenik and P.E.Hansen, The intramolecular                     hydrogen bond in chlorosubstituted ortho-hydroxy acetophenones.
             J.Mol.Struct. 700 (2004) 67-72.

153.      J.G.Sosnicki and P.E.Hansen, Temperature coefficients of NH chemical Shifts of                     Thioamides in Relation to Structure.
                      J.Mol. Struct.  700 (2004) 91-103.

154.      W.Bocian, R.Kawecki, E.Bednarek, J.Sitkowski, A.Piertzyk, M.P.Williamson,   P.E.Hansen and L.Kozerski, Interaction of the camptothecin family with non-nicked     DNA oligomers,
       Chem. Eur. J.  22 (2004) 5776-5787.

155.    L.Kozerski , B. Kwecien, R.Kawecki, Z. Urbanczyk-Lipkowska, W.Bocian, ,                            E.Bednarek, J.Sitkowski, J.Maurin, L. Pazderski and P.E.Hansen, Hydrogen Bonds in               “push-pull” enamines.
      New J. Chem. 28 (2004) 1562-1567.

156.    T.Dziembowska, P.E.Hansen and Z. Rozwadowski, Studies based on deuterium                        isotope effects on 13C NMR chemical shifts. 
            Progress in NMR.  45 (2004) 1-29.

157.     H.O.Desseyn, S.P.Perlepes, K.Clou, N.Blaton, B.J.Van der Veken, R.Dommisse and                P.E.Hansen, Theoretical, Structural,Vibribrational, NMR and Thermal evidence of the              Inter versus Intramolecular Hydrogen Bonding in Oxamides and Thiooxamides,
 J.Phys.Chem. A 108 (2004) 175-82.

158.     J.B.Sosnicki and P.E.Hansen, New Deuterium Isotope Effects on 19F and 13C                            Chemical Shifts across Intramolecularly Hydrogen Bonds of Non-resonance Assisted               Systems.
               Tetrahedron Lett. 46 (2005) 839-42.

159.      Quang Ton That, Kim Phi Phung and Poul Erik Hansen, Schiff Bases of Gossypol.                   A  NMR and DFT Study.
Magn.Reson.Chem.  43 (2005) 302-8.

160.      P.M. Dominiak, A. Filarowski, P.E. Hansen og K. Wozniak, Factor Analysis of 13C                 Isotope Effects and 13C NMR Chemical Shifts in Schiff Bases.
              Chem. Eur.J. 11 (2005) 4758-4766.

161.      S.Bolvig , K.Wozniak and P.E. Hansen, Steric Compres­sion Effects of                                      intramolecularly Hydrogen­ Bonded o-Hy­droxy Acyl Aromatics.  A X-ray and 13C                    NMR Study.
         J.Mol. Struct. 749 (2005) 155-168.

162.      A. Filarowski, A. Koll, M.Rospenk, I.Krol-Starzomska and P.E.Hansen,                                     Tautomerism of sterically hindered Schiff bases.  Deuterium Isotope Effects on 13C                  Chemical Shifts.
          J.Phys. Chem. A.  109 (2005) 4464-73.

163.      E.V.Borisov, E.V.Skorodumov, V.M.Pachenskaya and P.E.Hansen, Variable                           Temperature NMR study of Enolic Forms of Benzoylacetones.
    Magn.Reson.Chem.  43 (2005) 992-998.
164.      Doan Ngoc Nhuan, Le Nogoc Thach, Poul Erik Hansen and Fritz Duus.  Preparation                of dihydrocyclocitral from citronellal under solvent-less microwave irradiation.
  Tetrahedron Lett. 46 (2005) 6749-51.


165.     P.E. Hansen, NMR Studies of Compounds with Intramolecular Hydrogen bonds, In                  Isotope Effects in Chemistry and Biology, Eds. A. Kohen and H.-H. Limbach, CRC                 (2006).

166.     M.West-Nielsen, P.Dominiak, K.Wozniak, and P.E.Hansen, Strong Hydrogen                          Bonding involving Nitro and Acetyl groups.   Deuterium Isotope Effects on 13C                        Chemical Shifts.
               J. Mol. Struct.  789 (2006) 81-91.

167.   J.P.Hofmann, P.E.Hansen, A.D. Bond and F.Duus, Tautomerism in 3-Acyltetronic                      Acids Revisited.  A Spectrochemometric Approach to Tautomerism and Hydrogen-                 Bonding.
               J. Mol. Struct. 790 (2006) 80-88.

168.      Trung Thanh Nguyen, Thach Ngoc Le, Poul Erik Hansen and Fritz Duus
              Preparation and structural characterization of a new class of stable thioketones:                        ortho-hydroxythioacetophenones.
  Tetrahedron Lett.  47 (2006) 8433-35.

169.        J. Abildgaard, P.E.Hansen, J.Josephsen, B.K.V. Hansen, H.O.Sørensen and S. Larsen, Synthesis and Characterization of Nickel-, Palladium- and Platinum(II) Complexes of Three o,o-dihydroxydiarlazo Dyes.  Determination of the coordination geometry of theis comprehensive series of tridentate diaryl dye complexes by combining results from NMR and X-ray experiements with theoretical ab initio calculations.
         Inorg Chim Acta.  359 (2006) 4493-4502.

170.         A.Gorski, Y.Posokhov, B.KV.Hansen, J.Spanget-Larsen, J.Jasny, F.Duus, P.E.Hansen and J.Waluk, Photochromism and polarizations spectroscopy of p- methyl(thiobenzoyl)acetone.
  Chem. Phys. 328 (2006) 205-15.
171.B.KV.Hansen, A.Gorski, Y.Posokhov, F.Duus, P.E.Hansen and J.Waluk and  J.                  Spanget-Larsen, Monothiobenzoylmethane: Structural and vibrational assignments.
  Vibrational Spectroscopy, 43 (2007) 53-63.

172.     Trung Thanh Nguyen, Thach Ngoc Le, B.V.K. Hansen, Fritz Duus and Poul Erik                        Hansen, Hydrogen Bonding of Novel o-Hydroxythioacetophenones and related                         compounds studies by Deuterium Isotope Effects on 13C Chemical Shifts.
                         Magn.Reson.Chem. 45 (2007) 245-52.

173.       P.E.Hansen, F.Kamounah, B.V.K. Hansen and J.Spanget-Larsen, Conformational and               Tautomeric Eccentricities of 1,8-Dihydroxy-2-acetylnaphthalenes.
   Magn.Reson.Chem. 45 (2007) 106-117. 

174.        N.N.Doan, T.N.Le, H.C.Nguyen, P.E.Hansen and F.Duus.  Ultrasound Assisted                      Synthesis of 5,9-Dimethylpentadecane and 5,9-dimethylpentadecane- the sex                            pheromone of Leucoptera Coffeella
  Molecules, 12 (2007) 2080-2088.

 175.     A.Gorski, Y.Posokhov, B.KV.Hansen, J.Spanget-Larsen, J.Jasny, F.Duus, P.E.Hansen and J.Waluk, Photochromism in p-methyl(thiobenzoyl)acetone and related b-                           thioxoketones.
        Chem.Phys.  338 (2007)11-22.

176.       P.E. Hansen, Isotope Effects on Chemical Shifts of Hydrogen Bonded Systems.
J. Label. Comp. Radiopharm.  50 (2007) 967-81.

177.      Jacek G. Sosnicki, Morten Langaard and Poul Erik Hansen, Long-range Deuterium                  Isotope Effecs on 13C chemical Shifts of intramolecularly hydrogen bonded N-                         substituted-3-(cycloamino) thiopropionamides or amides:  a case of electric field                      effects
J. Org. Chem.  72 (2007) 4108-4116.

178      C.N.Albers, M, Bjørn-Mortensen, PE.Hansen, H. Ramløv and T.F.Sørensen,     Purification and structural Analysis of a Type III Antifreeze protein from the European Eelpout Zoarces Vivparus
Cryolett.  28 (2007) 51-60.
179.      A. Filarowski, A. Kochel, P.E. Hansen, A. Urbanowicz, K. Szymborska
         The Role of Ring Substituents on Hydrogen Bonding of 5-Cyano-2-                                          hydroxyacetophenone and 2-Hydroxy-4-methoxy-5-nitroacetophenone in the Ground               and Excited states.
  J.Mol.Struct.  844-845 (2007) 77-82.

180.     P.E.Hansen, F.S.Kamounah and S.Ullah, Intramolecular Hydrogen Bonding of o-                     Hydroxyesters and Related Compounds evaluated by Deuterium  Isotope Effects on                13C Chemical Shifts and Principal Component Analysis.
                       J.Mol.Struct. 844-845 (2007) 300-307.

181.     P.E.Hansen,  Deuterium Isotope Effects on 13C Chemical Shifts of Nitromalonamide
Magn.Reson.Chem.  46 (2008) 726-9.

182.  W.Bocian, R.Kawecki, E.Bednarek, J.Sitkowski, M.P.Williamson, P.E.Hansen and                     L.Kozerski, Model DNA oligomer with a nick motif for binding tests of TopoI                          poisons.
                      Chem. Eur. J.  14 (2008) 2788-94.

183.  Jan Nissen, Birgitte Thuesen Olesen, Jørgen Clausen and Poul Erik Hansen, 1H-NMR studies of metabolic effects of endo-and exogeneous compounds on astroglia cells cultivated in vitro.
Open Magn.Reson. J. 1 (2008) 88-94

184.     D.H.Ngan, H.T.C. Hoai, P.E.Hansen, O.Vang and L.M Huong, Bioactivities and                     Chemical constituents of a Vietnamese Medicinal Plant Che Vang JaSminum                             Subtriplinerve Blume,
Natural Product Research 22 (2008) 942 - 949

185.     C.N.Albers, G.T. Banta, O.S.Jacobsen and P.E.Hansen, Characterisation and structural              modelling of Danish field humic substances displaying significant differences                          compared to previously proposed structures.
Eur. J. Soil Sci. 59 (2008) 693-705.

186.    A. Filarowski, A. Koll, P.E.Hansen and M. Kluba, Intramolecular hydrogen bonding   and proton transfer in o-hydroxy aryl ketiomines.
J.Phys. Chem. A. 112 (2008) 3478-85.

187. Teresa Borowiak, Grzegorz Dutkiewicz, Jacek G. Sośnicki, Tadeusz S. Jagodziński, Poul Erik Hansen,  Secondary thioamide group deformations in different surroundings: the case of intramolecular N-H···N hydrogen bond – an X-ray study combined with theoretical calculations.
J.Mol.Struct. 892 (2008) 438-45.

188.     Lars Borch Smith and Poul Erik Hansen, Intramolecular Hydrogen Bonding of 5-Acyl-3-methylrhodanines.
Z. Phys. Chem. 222 (2008) 1213-1223.

189.    C.N.Albers, P.E.Hansen G.T.Banta and O.S.Jacobsen, Characterization of some                           humic substances and determination of their influence on the microbial degradation   of diuron in soil.
    Env.Sci.Technol. 42 (2008) 8687-91.

190. C.N.Albers, G.T.Banta, P.E.Hansen and O.S.Jacobsen.  Does organic matter influence sorption and fate of glyphosate in soil?  Comparing different soils and humic substances.
Env. Pollut.  157 (2009) 2865-70.


191.  J.Abildgaard, A.LiWang, M.N.Manolo and P.E.Hansen, Peptide Deuterium   Isotope Effects on Backbone 15N Chemical Shifts in Proteins.
J.Biol. NMR.  44 (2009) 119-24.

192. P.E.Hansen, Z.Rozwadowski and T.Dziembowska, Nuclear Magnetic Resonance  Spectroscopy of Hydroxy Schiff bases.
  Curr. Org. Chem. 13 (2009) 194-215.

193.  Jennifer H. Tomlinson, Saif Ullah, Poul Erik Hansen  and Mike P. Williamson

Characterisation of salt bridges to lysines in the Protein G B1 domain.
J.Am.Chem.Soc. 131 (2009) 4674-84.

194. Ly D. Ha, Poul Erik Hansen , Ole Vang, Fritz Duus, Hung D. Pham,Lien-Hoa D. Nguyen. Cytotoxic geranylated xanthones and O-alkylated derivatives of a-mangostin. 
Chem Pharm Bull. 57 (2009) 830-34.

195.  Pham Nguyen Tuyen, Nguyen Kim Phi Phung, Wei Zhang, Fadhil S. Kamounah and Poul Erik Hansen.  Synthesis and NMR studies of novel hydroxyflavones, hydroxyflavothiones, hydroxyflavanones and hydroxyflavanonethiones.
Magn.Reson Chem.  47 (2009) 1043-54

196.  Birgitte Thuesen Olesen, Wei Zhang,  Jørgen Clausen, Ole Vang and Poul Erik Hansen, Effect of Paraquat and Amyloid-β-peptide on the primary astrocyte metabolism studied by 1H-NMR.                             

 Open Magn.Reson. J.  2 (2009) 880-92.

197.  Daniel J. O´Leary Danel D. Hickstein, Bjarke K.V.Hansen and Poul Erik Hansen, Theoretic and NMR Studies of Deuterium Isotopic Perturbation of Hydrogen Bonding in Symmetrical Dihydroxy Compounds.
J.Org. Chem.  75 (2010) 1331-1342.  (Featured article).
198.  Christian Nyrop Albers, Poul Erik Hansen and Ole Stig Jacobsen, Methodological problems in determining TCAA in soils – the discovery of novel natural trichloroacetyl containing compounds and their interference with a common method for determining TCAA in soil and vegetation.     J. Environmental Monitor  12  (2010) 672-80.

199 .  W. Zhang, Liu Ming, Poul Erik Hansen, Yang Bo, Zhao Xia and Yu Guangli, Total NMR assignment and fine structure of k-Carrageenan-derived odd number Oligosaccharides.
J.Phycol. 46 (2010) 835-43.
200.  Christian Nyrop Albers, Poul Erik Hansen, 13C-NMR chemical shift databases as a quick tool to evaluate structural models of humic substances.
Open.Magn.Reson.J.  3 (2010) 96-105.

201. C. N. Albers, P. E Hansen, O. S Jacobsen, Trichloromethyl compounds - natural background concentrations and fates within and below coniferous forests
Science Total Environm.,  408 (2010) 6223-34

202. Saif Ullah, Wei Zhang and Poul Erik Hansen, Deuterium Isotope Effects on 13C and 15N Chemical Shifts of Intramolecularly Hydrogen-Bonded β-Enamine derivatives of Meldrum’s  and Tetronic acid.
J. Mol.Struct. 976 (2010) 377-391

203.  D. Hauchecorne, B.J. van der Veken, W.A. Herrebout, P.E. Hansen.  A 19F NMR study of C-I....p halogen bonding.
Chem.Phys.  381 (2011) 5-10.

204.  Fadhil.S.Kamounah, Peter Christensen and Poul Erik Hansen,  Acetyl cedrene and its follower. An Isotopic, NMR and MS Structure elucidation and deuteriation Study.
J. Label. Comp. Radiopharm.  54 (2011) 126-31.

205. P.E.Hansen, A.S.Peregudov, D.N.Kravtsov, A.I.Krylova,  G.M.Babakhina  and L.S.Golovchenko, Prototropic processes in benzaurins.  19F and 1H NMR spectra of fluoro- and methylsubstituted 4-hydroxyphenyl-diphenylcarbinols, related fuchsones and benzaurins
Central. Eur.J.Chem.  9 (2011) 253-264

206. Hiep D. Nguyen, Binh T. D. Trinh, Quyen N. Tran, Hoan D. Nguyen, Hung D. Pham,
Poul Erik Hansen, Fritz Duus, Joseph D. Connolly, Lien-Hoa D. Nguyen, Friedolanostane, friedocycloartane and benzophenone constituents of the bark and leaves of Garcinia benthami
Phytochemistry 72 (2011) 290-295

207. Phuong Tuyet Nguyen, Binh Xuan Thi Lam, Anders Rand Andersen, Poul Erik Hansen, Torben Lund. Photovoltaic performance and characteristics of dye sensitized solar cells prepared with the N719 thermal degradation products [RuL2(NCS)(4-tert-butylpyridine)]+ and [RuL2(NCS)(1-methylbenzimidazole)]+.
Eur. J. Inorg. Chem.  (2011) 2533-39.

208.  Saif Ullah, Takayoshi Ishimoto, Mike P.Williamson and Poul Erik Hansen, Ab initio Calculations of  Deuterium Isotope Effects on Chemical Shifts  of  Salt bridged lysines
J.Phys.Chem. B  115 (2011) 3208-15.

209.   Jens Spanget-Larsen, Bjarke K.V. Hansen and Poul Erik Hansen, OH stretching frequencies in systems with intramolecular hydrogen bonds. Harmonic and anharmonic analyses

Chem. Phys. 389 (2011) 107-115. Doi: 10.1016/j.chemphys.2011.09.011

210. Ming Liu, Poul Erik Hansen  and Xiukun Lin, Bromophenols in marine algae and their bioactivities.
Marine Drugs  9 (2011) 1273-92.

211.  Poul Erik Hansen, Deuterium Isotope Effects on 14,15N Chemical Shifts of Ammonium Ions. A Solid State NMR Study.
Int.J.Inorg. Chem.  (2011)
212. Ly D. Ha, Poul Erik Hansen, Fritz Duus, Hung D. Pham, Lien-Hoa D. Nguyen. Oliveridepsidones A-D, four prenylated depsidones from the bark of Garcinia Olivieri.
 Magn.Reson. Chem.   50 (2011) 242-45.

213.  Thu Hoai Thi Nguyen, Khanh Phuc Lam, Poul Erik Hansen and Kim Phi Phung,
 Some triterpenoids and phenolic compounds from leaves of Sonneratia Alba
J.E.Smith and their Acethylcholineesterase inhibition,
 J.Science and Tech. Vietn. 49 (2011) 1-8.

214.  Poul Erik Hansen and Jens Spanget-Larsen, Prediction of OH stretching frequencies in systems with intramolecular hydrogen bonds.
J. Mol.Struct1018 (2012) 8-13.
215. Ly D.Ha, Poul Erik Hansen, Fritz Duus, Lien-Hoa Nguyen and Hung D.Pham,                      A New Chromanone Acid form the Bark of Calophyllum dryabalanoides.
Phytochemistry letters, 5 (2012) 287-91.

216.  Poul Erik Hansen, Phuong Tuyet Nguyen, Jacob Krake, Jens Spanget-Larsen, Torben Lund.  Dye-sensitized Solar Cells and complexes between Pyridines and Iodines.  A NMR, IR and DFT study.
Spectrochim Acta A. 98 (2012) 247–251

217. Wei Zhang, Liu Ming and Poul Erik Hansen, Structure elucidation and biological effects of carrageenans from red algae.  In  Marine Biomaterials" (Isolation, Characterization and
Application) Ed. Se-Kwon Kim, CRC-Taylor & Francis.  Chap. 5 p-61-78 (2013).

218.  Phuong Tuyet Nguyen, Poul Erik Hansen, Torben Lund, The effect of 4-tert-butylpyridine and Li+ on the thermal degradation of TiO2 – bound ruthenium dye N719
Solar energy, 88 (2013) 23-30.

219. Mariusz Piertzak, Eugeniusz Grech , J.Nowicka-Scheibe and Poul Erik Hansen, Deuterium isotope effects on 13C chemical shifts of negatively charged NH..N systems
Magn.Reson.Chem. 51 (2013) 683-88.

220. Alexander Filarowski and Poul Erik Hansen
Secondary Isotope Effects on 13C and 15N Chemical Shifts of Schiff Bases revisited.
Z. Physical. Chem. 227  (2013) 917-927.
221.  Huynh Ngoc Vingh, Tran Thi Thanh Nhan, Huynh Bhi  Linh Chi, Nguyen Kim Phi Phung and Poul Erik Hansen, Structural studies of chemical constituents of Thithonia Tagetiflora Desv (Asteraceae).
Magn. Reson Chem. 51 (2013) 439-43.

222. Branka Mozetič Vodopivec, Jing Wang, Anne L. Møller, Jacob Krake, Torben Lund, Poul Erik Hansen, Søren Laurentius Nielsen, Differences in the structure of anthocyanins from two amphibious plants indicate different physiological roles of strucuturally different anthocyanins
Natural Products Research  27 (2013) 655-664

223. Poul Erik Hansen, Isotope effects on chemical shifts as a tool in the study of tautomeric
 equilibria.  In: Equilibria. Methods and theories.  L.Antonov ed. Wiley-VCH. 2013 

224.  Poul Erik Hansen, Fadhil S. Kamounah  and Daniel T. Gryko
Deuterium isotope effects on 13C chemical shifts of 10-Hydroxybenzo[h]quinolones
Molecules, 18 (2013) 4544-4560.

225.  Mike P. Williamson, Andrea M Hounslow, Joe Ford, Kyle Fowler, Max Hebditch, and Poul Erik Hansen, Detection of salt bridges to lysines in barnase in solution
Chem. Commun. 49 (2013) 9824-26.

Alexander Filarowski and Poul Erik Hansen
Secondary Isotope Effects on 13C and 15N Chemical Shifts of Schiff Bases revisited.
Z. Physical. Chem. 227  (2013) 917-927.

Wei Zhang, Liu Ming and Poul Erik Hansen, Structure elucidation and biological effects of carrageenans from red algae.  In  Marine Biomaterials" (Isolation, Characterization and
Application) Ed. Se-Kwon Kim, CRC-Taylor & Francis. Chap. 5 p-61-78 (2013).

Mariusz Piertzak, Eugeniusz Grech , J.Nowicka-Scheibe and Poul Erik Hansen, Deuterium isotope effects on 13C chemical shifts of negatively charged NH..N systems
Magn.Reson.Chem.51 (2013) 683-88.

Phuong Tuyet Nguyen, Poul Erik Hansen, Torben Lund, The effect of 4-tert-butylpyridine and Li+ on the thermal degradation of TiO2 – bound ruthenium dye N719
Solar energy, 88 (2013) 23-30.

Poul Erik Hansen, Fadhil S. Kamounah  and Daniel T. Gryko
Deuterium isotope effects on 13C chemical shifts of 10-Hydroxybenzo[h]quinolones
Molecules, 18 (2013) 4544-4560.

Mike P Williamson, Andrea M Hounslow, Joe Ford, Kyle Fowler, Max Hebditch, and Poul Erik Hansen, Detection of salt bridges to lysines in barnase in solution
Chem. Commun. 49 (2013) 9824-26.

Poul Erik Hansen, Isotope effects on chemical shifts as a tool in the study of tautomeric equilibria.  In: Equilibria. Methods and theories.  L.Antonov ed. Wiley-VCH. 2013 

Poul Erik Hansen, Fadhil S. Kamounah, Diana Zhiryakova, Yana Manolova and Liudmil Antonov,  1,1´,1´´-(2,4,6-Trihydroxybenzene-1,3,5-triyl)triethanone non-tautomerism.
Tetrahdron Lett. 55 (2014) 354-357.

Jacek Waluk, Mariusz Pietrzak, Jacek Dobkowski, Alexandr Gorski,Sylwester Gawinkowski, Michael Kijak, Roman Luboradzki, Poul Erik Hansen,  Arresting consecutive steps of a photochromic reaction: Studies of b-thioxoketones combining laser photolysis with NMR detection.
Chem.Phys.Phys.Chem. 16  (2014) 9128-9137

Phuong Hoang Tran, Poul Erik Hansen, Thuy Thanh Pham, Vy Thanh Huynh, Vy Hieu, Huynh, Thao Du Thi Tran, Thanh Van Huynh, Thach Ngoc Le. Microwave-Assisted Facile and Rapid Friedel-Crafts Benzoylation of Arenes Catalysed by Bismuth rifluoromethanesulfonate
Synthetic Communications 44 (2014) 2921-2929

Thi Hoai Thu Nguyen, Nguyen Kim Tuyen Pham, Khanitha Pudhom,
Poul Erik Hansen, Kim Phi Phung Nguyen, Structure elucidation of four new megastigmanes from Sonneratia ovata Backer (Sonneratiaceae)
Magn. Reson. Chem. 52 (2014) 795-802. DOI: 10.1002/mrc.4132

Poul Erik Hansen, Eugeny V. Borisov and John C. Lindon, Determination of the Tautomeric Equilibria of Pyridoyl Benzoyl beta-Diketones in the Liquid and Solid State through the use of Deuterium Isotope Effects on 1H and 13C NMR Chemical Shifts and Spin Coupling Constants
Spectrochim. Acta. 136 (2015) 107-112

Phuong Hoang Tran, Poul Erik Hansen , Hai Truong Nguyen, Thach Ngoc Le, Erbium trifluoromethanesulfonate-catalyzed Friedel–Crafts acylation using aromatic carboxylic acids as acylating agents under monomode-microwave irradiation.
Tetrahefron Lett. 56 (2015) 612-18.

Ming Liu , Jianjun Dong, Poul Erik Hansen, Lin Qiu, Hua Yin, Zhonghua Qian, Mei Yang, Xin Qi, Jing Li and Jinlai Miao
Pharmacological profile of Xanthohumol, a Prenylated Flavonoid from Hops (Humulus lupulus)
Molecules 20 (2015) 754-79.

Poul Erik Hansen, Isotope effects on chemical shift in the study of intramolecular hydrogen bonds.
Molecules 20 (2015) 2405-2424.

Poul Erik Hansen, John Mortensen and Fadhil S. Kamounah, The importance of correct tautomeric structures for biological molecules.
JSM Chem.  3 (2015) 1014-19

JSM Chem. 3 (2015) 1014-1019.

Phuong Hoang Tran,Vy Hieu Huynh, Poul Erik Hansen,  Duy-Khiem Nguyen Chau,Thach Ngoc Le, Microwave-assisted intramolecular Friedel-Crafts acylation of carboxylic acids using metal trifales in triflate anionic liquids.   

Asian J. Org. Chem.   4 (2015) 482-86.

Phuong Hoang Tran,Huy Manh Hoang,  Duy-Khiem Nguyen Chau,  Poul Erik Hansen,Thach Ngoc Le, Indium triflate in 1-isobutyl-3-methylimidazolium dihydrogenphosphate: efficient and green catalytic system for Friedel-Crafts acylation.
Tetrahedron Lett. 56 (2015) 2187-2192.

Y. Manolova, V. Kurteva and L. Antonov, H. Marciniak, S. Lochbrunner; A. Crochet, K.M. Fromm, F.S. Kamounah and P.E. Hansen. 4-Hydroxy-1-naphthaldehydes: proton transfer or deprotonation.
PhysChemChemPhys. 17 (2015) ,10238-49.

D.Ivanova, V.Deneva, D.Nedeltcheva, F.S.Kamounah, G.Gergov, P.E.Hansen, S.Kawauchi and L.Antonov.  Tautomeric transformations of Piroxicam in solution: a combined experimental and theoretical study.
RSC  Adv. 5 (2015) 31852-31860.

Henrik Berg Rasmussen, Ditte Bjerre, Kristian Linnet, Gesche Jürgens, Kim Dalhoff, Hreinn Stefansson, Thomas Hankemeier, Rima Kaddurah-Daouk, Olivier Taboureau, Søren Brunak, Tine Houmann, Pia Jeppesen, Anne Katrine Pagsberg, Kerstin Plessen, Jørgen Dyrborg, Peter Riis Hansen, Poul Erik Hansen, Tim Hughes, Thomas Werge, and the INDICES Consortium .   Individualization of treatments with drugs metabolized by carboxylesterase 1 – combining genetics and metabolomics
Future Med. Pharmcogenomics 16 (2015) 649-665.  DOI:     

Thi-Hoai-Thu Nguyen, Huu-Viet-Thong Pham, Nguyen-Kim-Tuyen Pham,
Ngo-Diem-Phuong Quach, Khanitha Pudhom, Poul Erik Hansen, Kim-Phi-Phung Nguyen, Chemical Constituents from Sonneratia ovata Backer and their in vitro Cytotoxicity and Acetylcholinesterase Inhibitory Activities
Bioorg. Med. Chem. Lett. 25 (2015) 2366–2371.

Phuong H. Tran, Hai N. Tran, Poul Erik Hansen, Thach N. Le, A simple, effective, green method for regioselective 3-acylation of unprotected indoles.

Molecules. 20(2015) 19605-19619

S. Hristova, G. Dobrikov, F. S. Kamounah, S. Kawauchi, P. E. Hansen, V. Deneva, D. Nedeltcheva, L. Antonov. 10-hydroxybenzo[h]quinoline: Switching between single and double-well proton transfer through structural modifications
RSC Adv. 5 (2015) 102495 - 102507.

Poul Erik Hansen.  Methods to distinguish tautomeric cases from static ones
In Tautomerism: Ideas, Compounds, Applications. Ed. L. Antonov.  Wiley-VCH (2016).

Phuong Hoang Tran, Hai Truong Nguyen, Poul Erik Hansen, Thach Ngoc Le.   An efficient and green method for regio- and chemo-selective Friedel–Crafts acylations using a deep eutectic mixture ([CholineCl][ZnCl2]3).
RSC Adv.  6 (2016)  37031 – 37038.

Phuong Hoang Tran,Huy Quang Phung,Hai Ngoc Tran, Poul Erik Hansen, Thach Ngoc Le.  Efficient Friedel-Crafts benzoylation of aniline derivatives with 4-fluorobenzoyl chloride using copper triflate in the synthesis of aminobenzophenones.
Synt. Comm.  46 (2016) 893-901.

Poul Erik Hansen and Jens Spanget-Larsen.  Structural studies on Mannich bases of 2-Hydroxy-3,4,5,6-tetrachlorobenzene.  An UV, IR, NMR and DFT study. A mini-review.
J.Mol.Struct. 1119  (2016) 235-239

.Huong Giang Thi Nguyen, Ngoc Vinh Nguyen, , Van Anh Vo,Fadhil s. Kamounah, Ole Vang, Poul Erik Hansen Synthesis and cytotoxicity of (+)-usnic acid derivatives in U87MG glioblastoma cells.
Nat.Prod.Chem.Res., 4 (2016) 216-223

Poul Erik Hansen, Torben Lund, Jacob Krake, Jens Spanget-Larsen and Søren Hvidt A Reinvestigation of the Ionic Liquid Diisopropylethylammonium formate by NMR and DFT Methods.
J.Phys.Chem. B.120 (2016) 11279-11286.       http://dx.doi.org/10.1021/acs.jpcb.6b08561

Thuc Huy Duong, Bui Linh Chi Huynh, Van Kieu Nguyen, Thi Hoai Thu Nguyen, Aurélie Bernard-Sauvager,Solenn Ferron, Warinthorn Chavasiri, Poul Erik Hansen, Marylene Chollet-Krugler, Holger Thüs, Joel Boustie, and Kim Phi Phung Nguyen. Newerythitol derivatives from the lichen Roccella bellangeriana.    

Phytochem. 137 (2017) 156-164..

Phuong Hoang Tran, Hai Truong Nguyen, Poul Erik Hansen, Thach Ngoc Le. Greener Friedel-Crafts Acylations using microwave-enhanced reactivity of bismuth triflate in the Friedel-Crafts benzoylation of aromatic compounds with benzoic anhydride
Chemistry Select. 2 (2017) 571-75. DOI: 10.1002/slct.201601681

Silvia Hristova, Fadhil S. Kamounah, Nevse Molla, Poul Erik Hansen, Daniela Nedeltcheva and Liudmil Antonov.  The possible tautomerism of the rotary switch 2-(2-(2-Hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3dione
Dyes and Pigments. 144 (2017) 249-261.

Poul Erik Hansen and Jens Spanget-Larsen, NMR and IR investigations of strong intramolecular hydrogen bonds. Molecules, 22 (2017) 552.

Silvia Hristova, Silvia Angelova, Poul Erik Hansen and Liudmil Antonov. 4-Carboxyl-2,6-dinitrophenylazohydroxynaphthalenes tautomerism NMR re explained and other methods verified.
Dyes and Pigments, 142 (2017) 226-229.

Shashikumar Keshav Paknikar, Fadhil S.Kamounah , Poul Erik Hansen and Murzban Sorab Wadia, Multi-step molecular rearrangement of acetyl cedrene to the hydrocarbon follower: Involvement of cyclopropyl carbinyl cation- cyclopropyl carbinyl cation rearrangement as key step

Chem.Nat.Comp. 53 (2017) 661-664.

.  Poul Erik Hansen.  Tautomerism and Biological activity of beta-diketones, triketones,beta-ketoestera dnd beta-ketoamides, A mini review.
Polish Chem. News (Wiadomosci Chemiczne)  71 (2017) 427-446.

H. Marciniak, S. Hristova, V. Deneva, F.S. Kamounah, P.E. Hansen, S. Lochbrunner and L. Antonov.  Dynamics of Excited State Proton Transfer in Nitro Substituted 10-Hydroxybenzo[h]quinolones.

Phys.Chem.Chem.Phys. 19 (2017) 26621-26629

Bahjat A. Saeed, Rita S. Elias, Fadhil S. Kamounah and Poul Erik Hansen. A NMR, MP2 and DFT Study of Thiophenoxyketenimines (o-ThioSchiff bases). Determination of the preferred form.

Magn.Reson.Chem. 56 (2018) 172-182.

S. Hristova, V. Deneva, M. Pittelkow, A. Crochet, F. S. Kamounah, K. M. Fromm, P. E. Hansen, L. Antonov. A Concept for stimulate proton transfer in 1-(phenyldeazenyl)napthalens-2-ols.

Dyes and Pigments 156 (2018) 91-99.

Quang Ton That, Truong Van Nguyen Thien, Huu Phuc Dang, Ngoc Le Hoan, Loan Kieu Thi Vo, Minh Huu Duc Nguyen, Nhan Truong Ngu, Thien S. Nguyen, Poul Erik Hansen.  Chemical Constituents of Geum urbanum L. Roots.

Nat.Prod.Res.  24 (1018) 1-6

Poul Erik Hansen, Andreas Koch and Erich Kleinpeter. Ring Current and Anisotropy Effects on OH Chemical Shifts

Tetrahedron Lett. 59 (2018) 22188-2292.

Huong Giang Thi Nguyen, Vinh Ngoc Nguyen, Fadhil S. Kamounah and Poul Erik Hansen, Structure of a new Usnic acid derivative from a deacylation reaction of in a Mannich reaction. NMR studies supported by theoretical calculations of NMR parameters

Magn. Reson. Chem.  56 (2018) 1094-1100.

 Evanildo G. Lacerda Jr., Fadhil S Kamounah, Kaline Coutinho,  Stephan P. A. Sauer, Poul Erik Hansen, Ole Hammerich.  Computational prediction of the 1H and 13C NMR chemical shifts for protonated alkylpyrroles - electron correlation and not solvation is the salvation.

ChemPhysChem. 20 (2019) 78-91.

Poul Erik Hansen, Aneta Jezierska, Jaroslaw Panek, and Jens Spanget-Larsen,  Theoretical calculations are a strong tool in the investigation of strong intramolecular hydrogen bonds.  In  Molecular Spectroscopy.  A Quntum Chemical Approach.  Eds. Y.Ozaki, M. Wojcik and J. Popp.  2019.  Wiley.

Seyedabdollah Seyedkatouli , Mohammad Vakili, Sayyed Faramarz Tayyari , Poul Erik Hansen , Fadhil S. Kamounah. Molecular structure, vibrational analysis, and intramolecular hydrogen bond strength of 3-methyl-4-amino-3-penten-2-one.  Molecular structure, vibrational analysis, and intramolecular hydrogen bond strength (IHBs) of 3-methyl-4-amino-3-penten-2-one and the effect of N-methyl and N-phenyl substitutions on the IHBs. An Experimental and Theoretical approach.

J.Mol.Struct. 1184 (2019) 233-245.

Nguyen T. L. Thuy, Pham T. Thuy, Bui T. Tung, Huynh T. Loc, Truong T. T. Dang, Le L. Ngoc, Nguyen X. Duc, Le T. Dung, Poul Erik Hansen and Nguyen K. P. Phung A New Flavone Glycoside from Lumnitzera littorea with in vitro α-Glucosidase Inhibitory Activity.

Nat. Prod. Commun.   14 (6) (2019)

Silvia Hristova, Fadhil S. Kamounah, Aurelien Crochet, Poul Erik Hansen, Katharina Fromm, , Daniela V. Nedeltcheva-Antonova,  Liudmil Antonov.  Isomerization and aggregation of 2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-dione: recent evidences from theory and experiment

J.Mol.Liquids  283 (2019) 242-248

T Lund, PE Hansen, J Josephsen, NJ Krake, J Mortensen.. Stability of the oxidized form of RuLL′(NCS) 2 dyes in acetonitrile in the presence of water and pyridines–Why the dye-sensitized solar cell electrolyte should be dry
Solar Energy 189 (2019) 235-243

T.T. Le Nguyen, T.T. Pham, P.E. Hansen, P.K.P. Nguyen.  In vitro α-glucosidase inhibitory activity of compounds isolated from mangrove Lumnitzera littorea leaves

Science and Technology Development Journal 22 (2019) 106-113.

P. E. Hansen, F. S. Kamounah, Bahjat A. Saeed,  M. J. MacLachlan  and J. Spanget-Larsen.  Intramolecular Hydrogen Bonds in Normal and Sterically Compressed o-Hydroxy Aromatic Aldehydes.  Isotope Effects on Chemical Shifts and Hydrogen Bond Strength.

 Molecules  24 (2019) 4533

Rita S. Elias, Bahjat A. Saeed, Fadhil S. Kamounah, Fritz Duus and Poul Erik Hansen.Strong Intramolecular Hydrogen Bonds and steric Effects involving C=S groups.  An NMR and Computational Study.                     

Magn.Reson.Chem. 58 (2020) 154-162 https://doi.org/10.1002/mrc.4959

Kwang-Hwi Cho and Poul Erik Hansen.  Structure Identification of Novel Compounds using simple IR, 1H and 13C NMR spectroscopy and Computational  Tools

Bull.Korean Chem. Soc.  41 (2020) 78-83.


 Truong Thi Huynh Hoa, Nguyen Duc Hoan,  Hoang Thi An, Ho Thi Cam Hoai,  Chu Pham Ngoc Son, Poul Erik Hansen, Isolation and biological testing of constituents  From Ilex Kaushue S.Y. Hu (Aquifoliaceae) Viet Nam.

Nat Prod Chem Res. (2019)7 366


Poul Erik, Hansen. Tautomerism detected by NMR, Encyclopedia, 2020, v2, Available online: https://encyclopedia.pub/606

Poul Erik Hansen, Bahjat A. Saeed, Rita S. Rutu and Teobald Kupka.  One-bond 1J(15N,H) coupling constants at sp2 hybridized nitrogen of Schiff bases, enaminones and similar compounds. A theoretical study.

Magn. Reson.Chem. 58 (2020) 750-762.

 Truong Van Nguyen Thien, Thi Kieu Loan Vo, Phu Hoang Dang, Vinh Huynh Ngoc, Thi Thuy Duong Ngo, Thi My-Nuong Nguyen, Poul Erik Hansen* and Quang Ton Thata*. Two new sesquiterpenes from the stems of Miliusa velutina.

Nat. Product Res. (2020)


Poul Erik Hansen, NMR of complex, heterogenous structures exemplified by humic substances. Encyclopedia, 2020, v2, Available online: https://encyclopedia.pub/1495

Poul Erik Hansen, Salt Bridges investigated by Nuclear Magnetic Resonance (NMR)

Encyclopedia, 2020, v2, Available online: https://encyclopedia.pub/1720

 Lisa Samuelsen, Poul Erik Hansen, and Ole Vang, Derivatives  of  usnic acid cytostatic effect in Caco-2 cells.

 Nat. Product Res.   35 (2021) 4953-4959   doi.org/10.1080/14786419.2020.1756796


 Poul Erik Hansen, Structural Studies of b-diketones and its implications on Biological Effects

Pharmaceuticals 14 (2021) 1189.


Sarah L. V. Zahn, Ole Hammerich, Poul Erik Hansen, Stephan P. A. Sauer.  The Best DFT Functional for the Prediction of 1H and 13C Chemical Shifts of Protonated Alkylpyrroles

J. Comput. Chem. (2021) 1–15.


 Poul Erik Hansen, A Spectroscopic Overview of Intramolecular NH…O,N,S Hydrogen Bonds.

Molecules  26 (2021) 2409.


Vahidreza Darugar , Mohammad Vakili , Sayyed Faramarz Tayyari ,

Fadhil S. Kamounah,  Poul Erik Hansen.  Molecular structure, intramolecular hydrogen bond strength, vibrational assignment, and spectroscopic insight of 4-phenylamino-3-penten-2-one and its derivatives; A theoretical and experimental study.

J.Mol. Liq. 334 (2021) 116035                         


Atanas Kurutos, Stephan P. A. Sauer, Fadhil S. Kamounah,  Poul Erik Hansen,

Azo-hydrazone derived molecular switches: Synthesis and conformational investigation.

Magn.Reson.Chem. 59 (2021) 1116–1125.doi: 10.1002/mrc.5164


Henrik Berg Rasmussen, Kornelius Zeth, Poul Erik Hansen, Olivier Taboureau, Ragnar Thomsen, Gesche Jürgens, Peter Riis Hansen. Cellular Uptake and Intracellular Phosphorylation of GS-441524: Implications for Its Effectiveness against COVID-19

Viruses. 2021, 13, 1369. https://doi.org/10.3390/v13071369


 Poul Erik Hansen, Mohammad Vakili, Fadhil S. Kamounah and Jens Spanget-Larsen

Prediction of NH stretching frequencies of Intramolecularly hydrogen bonded systems.

Molecules 26 (2021) 7651. https://doi.org/10.3390/molecules26247651


284.  Poul Erik Hansen, NMR of natural products as potential drugs

Molecules 26 (2021) 3763. doi.org/10.3390/molecules26123763


285. Lars Carlsen, Poul Erik Hansen, Bahjat A. Saeed and Rita S. Elias, Curcumin analogues for possible cancer treatment. A QSAR study.

World Journal of Biological and Pharmaceutical Research. 01 (2021) 001–016


 Mariusz Pietrzak, Joanna Buczyńska, Fritz Duus, Jacek Waluk  and Poul Erik Hansen.  Photoinduced and Ground State Conversions in a Cyclic b-Thioxoketone  

RSC Adv.  12 (2022), 681-689


Hoang Khang Le, Thanh Tung Phan, Thi My Nuong Nguyen, Thanh Chung Nguyen,

Cong Luan Tran, Poul Erik Hansen  and Quang Ton That, A new sesquiterpene lactone from the leaves of Panax vietnamensis Ha et Grushv. (Vietnamese ginseng)

Nat.Product.Res.  37 (2023) 3580-3587.  doi.org/10.1080/14786419.2022.2094374


 Poul Erik Hansen, Isotope Effects on Chemical shifts of small molecules.

 Molecules 27 (2022) 2405. doi.org/10.3390/molecules27082405 and in Hydrogen Bonds

 Mirosław Jabłoński, Ed.  ISBN 978-3-0365-6770-9 (hardback); ISBN 978-3-0365-6771-6 (PDF)


Truong Van Nguyen Thien, Thi Kieu Loan Vo, Phu Hoang Dang, Vinh Huynh Ngoc, Thi Thuy Duong Ngo, Thi My-Nuong Nguyen, Poul Erik Hansen and Quang Ton That.  Two new sesquiterpenes from the stems of Miliusa velutina.

Nat. Product Res. 36  (2022) 553-559 DOI: 10.1080/14786419.2020.1789984


 Mahmoud Bazrafshan, Mohammad Vakili, Sayyed FaramarzTayyari, Fadhil S.Kamounah,Poul ErikHansen, Mohammad RezaHousaindokht. Vibrational spectra, conformation and molecular transport of 5-amino-2,2,6,6-tetramethyl-4-hepten-3-one.

 J.Mol. Struct. 1272  (2023) 134178.


 Mahmoud Bazrafshan, Mohammad Vakili, Sayyed Faramarz Tayyari, Fadhil S. Kamounah, Poul Erik Hansen, Ali Shiri.  Synthesis, molecular structure, conformational, and intramolecular hydrogen bond strength of ethyl 3-amino-2-butenoate and its N-Me, N-Ph, and N-Benzyl derivatives; an experimental and theoretical study.

J. Mol. Struct.  1274 (2023) 134479.


 Hui Dong, Poul Erik Hansen, Songtao Dong, Dimitrios Stagos, Xiukun Lin and Ming Liu, Marine natural bromophenols: Sources, structures, main bioactivities and Toxicity in Science and Engineering of Marine Phenolics, Elsevier 2023.  ISBN: 978-0-12-823589-8.


 Poul Erik Hansen, Isotope Effects in Hydrogen Bond Research.

In "Spectroscopy and Computation of Hydrogen-Bonded Systems" Eds. M. J. Wojcik and Y. Ozaki.  Wiley, Weinheim, Gernmany. 2023.  ISBN: 978-3-527-34972-2.


Poul Erik Hansen, Vahidreza Darugar, Mohammad Vakilli, and Fadhil S. Kamounah.  Tautomerism of Pyridinylbutane-1,3-diones.  An NMR and DFT study.

Magn.Reson.Chem. 61 (2023)1–7.


 Poul Erik Hansen. Tautomerism of b-Diketones and b-Thioxoketones.

Encyclopedia.  3 (2023)182–201.


 Poul Erik Hansen   and Fadhil S. Kamounah, Multiple Intramolecular Hydrogen Bonding in large Biomolecules.  DFT Calculations and Deuterium Isotope Effects on 13C chemical shifts as a tool in structural studies.

Chemistry, 5, (2023) 1317–1328. https://doi.org/10.3390/chemistry5020089



Mohammad Vakili, Vahidreza Darugar, Fadhil S. Kamounah, Poul Erik Hansen Mathias Hermann, Michael Pittelkow.  Tautomerism, crystal structure and intramolecular hydrogen bonding of pyridinyl methyl b-diketones in the liquid and solid state. Using different theoretical and experimental methods.

J. Mol. Liquids.  383 (2023) 122074














For recent publications recent 

Published abstracts:
1.           J. H. Baldo, J. W. Shriver, P. E. Hansen and B. D. Sykes,  NMR Studies of Myosin
              S-1 ATPase.
                            Biophys. J., 21 (1978) A 141.

2.           P. E. Hansen and E. Tüchsen, 13C Chemical Shi­fts and Deute­rium Isotope Effects for Structure Determina­tion of Prot­eins.
                            J. Cellul. Biochem. 13A (1989) 31.

3.           C. Lauritzen, O. Skovgaard, E. Tüchsen and P. E. Hansen, N-Extension of BPTI. A Model for Folding and Long-range    Interac­tions.
                            J. Cellul. Biochem., S156 (1991) 65.

4.           P. E. Hansen, J. Abildgaard and Aa. E. Hansen, Structure Infor­mation from Charge Induced Chemical Shift Changes 
                            J. Cellul. Biochem., 17C (1993) 306.

5.             K.K. Laali and P.E. Hansen, Can fluorine perturb the site(s) of lectrophilic  attack in pyrene persistent fluoropyrenium ions- Generation and charge   distribution probed by multinuclear NMR.
                Abstr. Pap AM Chem. S. 200-7 orgn part 2 Mar 28 1993

6.           P. E. Hansen, C. Lauritzen, S. Bjørn, L. C. Petersen, K. Norris and O. H. Olsen, Determination of Structural Changes in BPTI Mutants using 13C NMR Chemical Shifts.
              J.Cellul. Biochem., 21B (1995) 72.

7.         J. Abildgaard, P. E. Hansen and Aa. E. Hansen, Isotope Effects on 13C and 15N Chemical Shifts in Proteins from Electric Field Effects.
              J.Cellul. Biochem., 21B (1995) 68.

8.  Poul Erik Hansen, Structural Studies of a Series of Acetylated Polyphenols and  Schiff Bases thereof all with Intramolecular Hydrogen Bonds using Deuterium Isotope Effects on 13C NMR Chemical Shifts, PCA methods, X-ray and Ab Initio           Calcualtions.
              Polyphenols Comm., 2004, 37-38.

9.          Poul Erik Hansen, Huynh Hoa Thi Troung, Ngoc Son Chu Pham, Flavonoid content  in Vietnamese Tea.
      Polyphenols Comm., 2006, 403-404.


Other publications:

1.  Poul Erik Hansen og Arne Berg, Blyfri benzin, et vigtigt skridt, men hvad    med de carcinogene PAH'er?,
              Dansk Ke­mi, (1985) 354-356.

2.    Poul Erik Hansen, Observations and Reflections on Every-day Chemical Phenomena in      Introductory Chemistry.  For­mation and use of a Common Minimal Base. 
  The Nordic Conference on Science and Technology Educa­tion: The challenge for the future (1985) 53-56.

3.     Poul Erik Hansen og Kjeld Schaumburg, Fra NMR til MR, en spektroskopisk metode i udvikling.
          Dansk Kemi, (1987) 76-82.

4.    Niels-Erik Foldberg, Poul Erik Hansen og Jens Josephsen, Smertekemi. 
        Skrifter fra Institut for Biologi og Kemi, RUC, 5 (1987) 1-86.

5.    P. E. Hansen og J. Josephsen, Simulering af stoffers membranpermeabilitet.
       Dansk Kemi (1990) 177.

6.    Poul Erik Hansen, Ibuprofen.
       Skrifter fra Institut for Biologi og Kemi, RUC, 18
       (1991­) 1-11.

7.     Y. A. Barnett, K. Eger, S. Eriksson, G. Folkers, P. E. ­Hansen, R. Hofbauer, D.                           Komitowsky, A. Milon and B. Munch-Peter­sen, Gene Technology-Based Antimetaboli­           te Design:  The use of an in Vitro Protein Expression System to facilitate Anti­metabo­lite          Design for Virally-induced Human Diseases and Malignant Condi­tions. 
         Biotech. Adv. 12 (1994) 663-668.

8.      Poul Erik Hansen, Isotopeffekter.
         Dansk Kemi (1996) 13-17.

9.     Poul Erik Hansen, Jens Peter Nielsen og Morten Langgård, Hvad er kemien bag                       østrogenlignende stoffer?
        Dansk Kemi . 12 (1996) 34-35.

10.   Dai Hue Ngan, Ho Thi Cam Hoai, Le Mai Huong, Poul Erik Hansen and Ole Vang, Bioactivities and chemical constituens of a Vietnamse medicinal plant Che Vang Jasminum subtriplinerve Blume. 
International Workshop on Herbal Medicinal Plants and Traditional Herb Remedies.  Hanoi, Vietnam 20-21 September 2007.

11.   Hansen, Poul Erik (2010, October 4). Deuterium Isotope Effects on Chemical Shifts. SciTopics. http://www.scitopics.com/Deuterium_Isotope_Effects_on_Chemical_Shifts.html

12. Ha, L.D., Nguyen, L.H.D., Pham, H.D., Hansen, P.E. and Duus, F. Isolation and Determination of Phenolics from the Bark of Callophyllum calaba L. var. bracteatum (Wight) Stevens.
J. Med. Materials (Hanoi), 13, (2008) 223-226.

13. Nguyen, H.T., Hansen, P.E., Duus, F., Heilmann, G., Pham, H.D. and Nguyen, L.H.D. Isolation and Preparation of Cytotoxic Chromanone Acids from the Bark of Callophyllum dongnaiense.
 J. Chem. (Vietnam), 47 (2009)  347-351(2009).

14. Poul Erik Hansen og Torben Lund,   Kan Danmark få styr på solens stråler, Politiken (2013).