%0 Journal Article %1 WOS:000252497500006 %A Freire, P T C %A Melo, F E A %A Filho, J Mendes %A Lima, R J C %A Teixeira, A M R %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2007 %I ELSEVIER SCIENCE BV %J VIBRATIONAL SPECTROSCOPY %K Raman acid; bond; high hydrogen pressure; scattering} {amino %N 2, SI %P 99-102 %R 10.1016/j.vibspec.2007.05.003 %T The behavior of NH3 torsional vibration of L-alanine, L-threonine and taurine crystals under high pressure: A Raman spectroscopic study %V 45 %X Raman spectra Of L-alanine, L-threonine and taurine amino acids crystals under high-pressure conditions at room temperature were investigated in a diamond anvil cell in order to observe the behavior of the torsional mode of NH3 unit. It was observed for L-threonine and taurine crystals that increasing pressure produces an increase in the wave number of the band associated to the torsional vibration of ammonium group, while for L-alanine crystal a decrease in the wave number is observed. The anomalous behavior Of L-alanine is explained in terms of the length and geometry of the hydrogen bonds within the crystalline structure: due to a short average length the effect of pressure is to deform the hydrogen bond, while for L-threonine and taurine, pressure approximates the N and O atoms in the N-H center dot center dot center dot 0 intermolecular bond. (c) 2007 Elsevier B.V. All rights reserved.

@article{WOS:000252497500006, abstract = {Raman spectra Of L-alanine, L-threonine and taurine amino acids crystals under high-pressure conditions at room temperature were investigated in a diamond anvil cell in order to observe the behavior of the torsional mode of NH3 unit. It was observed for L-threonine and taurine crystals that increasing pressure produces an increase in the wave number of the band associated to the torsional vibration of ammonium group, while for L-alanine crystal a decrease in the wave number is observed. The anomalous behavior Of L-alanine is explained in terms of the length and geometry of the hydrogen bonds within the crystalline structure: due to a short average length the effect of pressure is to deform the hydrogen bond, while for L-threonine and taurine, pressure approximates the N and O atoms in the N-H center dot center dot center dot 0 intermolecular bond. (c) 2007 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Freire, P T C and Melo, F E A and Filho, J Mendes and Lima, R J C and Teixeira, A M R}, biburl = {https://www.bibsonomy.org/bibtex/25640a20c5b67697f5b052e70ff8e23ee/ppgfis_ufc_br}, doi = {10.1016/j.vibspec.2007.05.003}, interhash = {85f23a998343d87faf5f4aeecab3ebbf}, intrahash = {5640a20c5b67697f5b052e70ff8e23ee}, issn = {0924-2031}, journal = {VIBRATIONAL SPECTROSCOPY}, keywords = {Raman acid; bond; high hydrogen pressure; scattering} {amino}, note = {Workshop on Foundations and Applications of Raman Spectroscopy, Ceara, BRAZIL, SEP 24-26, 2006}, number = {2, SI}, pages = {99-102}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {The behavior of NH3 torsional vibration of L-alanine, L-threonine and taurine crystals under high pressure: A Raman spectroscopic study}, tppubtype = {article}, volume = 45, year = 2007 }