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Raman and IR spectral studies of L ‐phenylalanine L ‐phenylalaninium dihydrogenphosphate and DL ‐phenylalaninium dihydrogenphosphate
Author(s) -
Ravikumar B.,
Rajaram R. K.,
Ramakrishnan V.
Publication year - 2006
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1485
Subject(s) - chemistry , raman spectroscopy , hydrogen bond , protonation , phenylalanine , ion , medicinal chemistry , crystallography , molecule , organic chemistry , biochemistry , amino acid , physics , optics
The infrared (IR) and Raman spectra were recorded at room temperature for L ‐phenylalanine, L ‐phenylalaninium dihydrogenphosphate, and DL ‐phenylalaninium dihydrogenphosphate, and the observed bands were assigned. In the first compound, a phenylalaninium cation and a zwitterionic L ‐phenylalanine and in the latter compound two protonated DL ‐phenylalaninium cations have been identified. Presence of NH···O and OH···O hydrogen bonds are revealed from the spectra. The symmetry of the dihydrogenphosphate anion is found to be retaining C 2 v symmetry in both crystals. Copyright © 2006 John Wiley & Sons, Ltd.