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

  L.Kozerski, S.Urbanczyk-Lipkowska, K.Kamienski, W.Bocian, E.Bednarek, J.Sitkowski, K.Zakrewska, K.T.Nielsen and P.E.Hansen, Genistein Complexes with Amines.  Evaluation of the biological function of the C-7, C-5 and C-4’-OH Groups studied in Solution and Solid state by ¹³C NMR and X-ray.   Org.Biomol.Chem.  1, (2003) 3578-85.

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 NMR,  18A (2003) 56-71. 

  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.

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.

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.  

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.

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

 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.

 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.

 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.

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.

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

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. 

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

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.

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

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.

 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.

 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.

 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-

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.

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 press (2006).

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. 

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.

   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-dihydroxydiarylazo Dyes.  Determination of the coordination geometry of this 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.

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.

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

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) 8433-8435.

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 Spectrosc,   43 (2007) 53-63. 

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.

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.

C.N.Albers, M. Bjørn-Mortensen, P.E.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.

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.

 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.

 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.

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

 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.

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.

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 Jaminum Subtriplinerve Blume, Natural Product Research 22 (2008) 942 - 949

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. Eur.J.Chem.   14 (2008) 2788-94. 

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.

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

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.

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

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

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.

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.

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

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.

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.

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) 119-126.

. 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.

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) 1047-54.

Daniel J. O´Leary, Daniel D. Hickstein, Bjarke K.V. Hansen, and Poul Erik Hansen, Theoretical and NMR Studies of Deuterium Isotopic Perturbation of Hydrogen Bonding in Symmetrical Dihydroxy Compounds.

J.Org.Chem. 75 (2010) 1331-1342.

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.

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.

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. 3 (2010) 96-105.

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.

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.

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

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

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

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.

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.

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.

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

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

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) 107-115DOI: 10.1016/j.chemphys.2011.09.011

Poul Erik Hansen and Ken Wilkins, Midlertidige tatoveringer kan være farlige,
Dansk Kemi.   92 (2011) 34.

Poul Erik Hansen, Deuterium Isotope Effects on 14,15N Chemical Shifts of Ammonium Ions. A Solid State NMR Study.

Int.J.Inorg. Chem. (2011) doi:10.1155/2011/696497

Nguyen Thi Hoi Thu, Lam PhucKhan, NguyenThe Duy, Nguyen Thi Kim Canch, Nguyen KimPhi Phung and Poul Erik Hansen, Chemical Constituents form leaves of Sannerato Alba J.E. Smith (Sonneratiaceae).
Science and Technology Development, Vietnam 14 (2011) 11-17

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 (2012) 242-45. DOI: 10.1002/mrc.2862

.Poul Erik Hansen and Jens Spanget-Larsen,  Prediction of OH stretching frequencies in systems with intramolecular hydrogen bonds.
J. Mol.Struct. 1018 (2012) 8-13. DOI: 10.1016/j.molstruc.2012.01.011

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. DOI information: 10.1016/j.phytol.2012.02.003

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. DOI information:10.1016/j.saa.2012.08.006

Huynh Ngoc Vingh, Tran Thi Thanh Nhan, Huynh Bhi  Linh Chi, Nguyen Kim Phi Phung and Poul Erik Hansen, Structural Sudies of the chemical constituents of Thithonia Tagetiflora Desv (Asteraceae).
Magn.Reson.Chem.. 51 (2013) 439-43.

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.

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 stimulated 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. 7 (2019) 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.http://dx.doi.org/10.1002/mrc.5052

 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

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

Hui Dong , Songtao Dong , Poul Erik Hansen , Dimitrios Stagos , Xiukun Lin, Ming Liu.  Progress of Bromophenols in Marine Algae from 2011 to 2020: Structure, Bioactivities, and Applications.

Mar. Drugs  2020, 18, 411; doi:10.3390/md18080411

Poul Erik Hansen, Isotope Effects on Chemical Shifts in the Study of Hydrogen Bonded Biological Systems.

Progress NMR, 120–121 (2020) 109–117

Ming Liu and Poul Erik Hansen. Marine Bromophenols, synthesis, biological effects

Encyclopedia, 2020, available online: https://encyclopedia.pub/2880.

Poul Erik Hansen, Structural Studies of b-diketones and its implications on Biological Effects. Pharmaceuticals 14 (2021) 1189.

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

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

Poul Erik Hansen, NMR of natural products as potential drugs

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

Henrik Berg Rasmussen, Kornelius Zeth, Poul Erik Hansen, Olivier Taboureau, Ragnar Thomsen, Gesche Jürgens, Peter Riis Hansen. Potential of GS-441524 in the treatment of Covid-19.

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

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

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

Molecules  26 (2021) 2409.

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.

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

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

 Nat. Product Res.  35 (2021) 4953-4959    https://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.

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

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

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

  Molecules.  27 (2022) 2405. doi.org/10.3390/molecules27082405 

molecules27082405 and in Hydrogen Bonds.  Mirosław Jabłoński, Ed.  ISBN 978-3-0365-6770-9 (hardback); ISBN 978-3-0365-6771-6 (PDF)

 

 Hoang Khang Le, Thanh Tung Phan, Thi My Nuong Nguyen, Thanh Chung Nguyen, Cong Luan Tran, Poul Erik Hansenfand Quang Ton That, A new sesquiterpene lactone from the leaves of Panax vietnamensis Ha et Grushv. (Vietnamese ginseng)

Nat.Product.Res. doi.org/10.1080/14786419.2022.2094374

Mahmoud Bazrafshan, Mohammad Vakili, Sayyed FaramarzTayyari, 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. 

 

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. 2022.  ISBN: 978-3-527-34972-2.

 Poul Erik Hansen. Tautomerism of b-Diketones and b-Thioxoketones. Encyclopedia.  3 (2023)182–201.

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.

 

Mohammad Vakili , Vahidreza Darugar , Fadhil S. Kamounah , Poul Erik Hansen , Mathias Hermann b, Michael Pittelkow bTautomerism in pyridinyl methyl β-diketones in the liquid and the solid state; a combined computational and experimental study.

J.Mol.Liquid. I383 (2023) 122074

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

Hoang Khang Le, Thanh Tung Phan, Thi Kieu Loan Vo, Thi Thuy Duong Ngo,   Hoang Long    Ngo, Poul Erik Hansen and Quang Ton That.^. Miliutine A acid a new cyclofarnesane sesquiterpene from the stems of Miliusa velutina

    Natural Product Research. 37 (2023) 3580-87. https://doi.org/10.1080/14786419.2023.2248540

Poul Erik Hansen, The synergy between NMR and DFT calculations.

Molecules, 29 (2) (2023)336

 

P.E. Hansen Tautomerism of b-diketones and b-thioxoketones

Encyclopedia 3 (2023) 182–201

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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