Zobrazeno 1 - 10
of 401
pro vyhledávání: '"Poul-Erik Hansen"'
Autor:
Poul-Erik Hansen, Sabrina Rostgaard Johannsen, Søren Alkærsig Jensen, Jonas Skovlund Møller Madsen
Publikováno v:
Frontiers in Physics, Vol 9 (2022)
Light-matter interplay is widely used for analyzing the topology of surfaces on small scales for use in areas such as nanotechnology, nanoelectronics, photonics, and advanced materials. Conventional optical microscope imaging methods are limited in r
Externí odkaz:
https://doaj.org/article/104a078a400f4eeca7ff24b8f33285ea
Autor:
Poul Erik Hansen, Fadhil S. Kamounah
Publikováno v:
Chemistry, Vol 5, Iss 2, Pp 1317-1328 (2023)
Large biomolecules often have multiple intramolecular hydrogen bonds. In the cases where these interact, it requires special tools to disentangle the patterns. Such a tool could be deuterium isotope effects on chemical shifts. The use of theoretical
Externí odkaz:
https://doaj.org/article/5d9d5a80d1dd4947995d2d042a565f3b
Autor:
Poul Erik Hansen
Publikováno v:
Encyclopedia, Vol 3, Iss 1, Pp 182-201 (2023)
The present overview concentrates on recent developments of tautomerism of β-diketones and β-thioxoketones, both in solution and in the solid state. In particular, the latter has been a matter of debate and unresolved problems. Measurements of 13C,
Externí odkaz:
https://doaj.org/article/f5b10e708c0c4ea8be20ab57fb1631ad
Autor:
Poul Erik Hansen
Publikováno v:
Molecules, Vol 29, Iss 2, p 336 (2024)
This paper deals with the synergy between Nuclear Magnetic Resonance (NMR) spectroscopic investigations and DFT calculations, mainly of NMR parameters. Both the liquid and the solid states are discussed here. This text is a mix of published results s
Externí odkaz:
https://doaj.org/article/b5ca6c8f83614fce94bcd1c9e19a9430
Publikováno v:
Hansen, P E, Darugar, V, Vakili, M & Kamounah, F S 2023, ' Tautomerism of pyridinylbutane-1,3-diones : An NMR and DFT study ', Magnetic Resonance in Chemistry, vol. 61, no. 6, pp. 356–362 . https://doi.org/10.1002/mrc.5342
The three possible 1-(n-pyridinyl)butane-1,3-diones (nPM) have been synthesized. Structures, tautomerism, and conformations are investigated by means of DFT calculations. 1H and 13C NMR spectra are assigned, and deuterium isotope effects on 13C chemi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0478cff722872864e7fdc476bb6fa200
https://doi.org/10.1002/mrc.5342
https://doi.org/10.1002/mrc.5342
Autor:
Poul Erik Hansen
Publikováno v:
Molecules, Vol 27, Iss 8, p 2405 (2022)
This review is giving a short introduction to the techniques used to investigate isotope effects on NMR chemical shifts. The review is discussing how isotope effects on chemical shifts can be used to elucidate the importance of either intra- or inter
Externí odkaz:
https://doaj.org/article/418b7980950848029d9f3c7d1a8bc1b2
Autor:
Poul Erik Hansen
Publikováno v:
Roskilde University
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::803c42dfba21c544692ee5a5aae32103
https://doi.org/10.1002/9783527834914.ch7
https://doi.org/10.1002/9783527834914.ch7
Autor:
Henrik Berg Rasmussen, Gesche Jürgens, Ragnar Thomsen, Olivier Taboureau, Kornelius Zeth, Poul Erik Hansen, Peter Riis Hansen
Publikováno v:
Viruses, Vol 13, Iss 7, p 1369 (2021)
GS-441524 is an adenosine analog and the parent nucleoside of the prodrug remdesivir, which has received emergency approval for treatment of COVID-19. Recently, GS-441524 has been proposed to be effective in the treatment of COVID-19, perhaps even be
Externí odkaz:
https://doaj.org/article/15d61dbd3e404e23840e2bbba81147ee
Autor:
Poul Erik Hansen
Publikováno v:
Molecules, Vol 26, Iss 12, p 3763 (2021)
This review outlines methods to investigate the structure of natural products with emphasis on intramolecular hydrogen bonding, tautomerism and ionic structures using NMR techniques. The focus is on 1H chemical shifts, isotope effects on chemical shi
Externí odkaz:
https://doaj.org/article/662f9632038949d09b4ad8477bf9d7e7
Autor:
Asbjørn Moltke, Callum R. Smith, Rasmus D. Engelsholm, Erik N. Christensen, Mattia Michieletto, Jonas S. Madsen, Jürgen Appel, Anders Brusch, Poul Erik Hansen, Christian R. Petersen, Christos Markos, Patrick B. Montague, Ole Bang
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XXII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8de7517cd48a82844cb88474bb7ab267
https://doi.org/10.1117/12.2649940
https://doi.org/10.1117/12.2649940