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Temperature dependence of the Raman spectrum of fully deuterated acetanilide
Author(s) -
Sauvajol J. L.,
Almairac R.,
Moret J.,
Barthes M.,
Ribet J. L.
Publication year - 1989
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.1250200807
Subject(s) - acetanilide , raman spectroscopy , deuterium , chemistry , raman scattering , phonon , normal mode , molecular vibration , analytical chemistry (journal) , frequency shift , molecular physics , nuclear magnetic resonance , atmospheric temperature range , condensed matter physics , vibration , atomic physics , optics , physics , thermodynamics , organic chemistry , quantum mechanics
The temperature dependence of the Raman scattering from a single crystal of acetanilide (ACN‐H) and fully deuterated acetanilide (ACN‐D) in the low‐frequency (phonon) and CO stretching regions was studied. The observed normal behaviour of the frequency shift of the CO stretching modes in ACN‐D, raises questions concerning several theoretical models previously proposed to explain the peculiar behaviour with temperature of the A 1g stretching modes observed in ACN‐H. The forms of the low‐frequency Raman spectra for ACN‐H and ACN‐D are very similar, except in the frequency range 70‐120 cm −1 , where an additional mode (denoted D′) is seen in the Raman spectrum of ACN‐D. A strong temperature dependence of the frequency of this band is observed. The origin of this mode is still undecided.