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Raman study of the ν(CO) mode of ethyl trifluoroacetate in solution. Reorientational and vibrational relaxation
Author(s) -
Hernanz A.,
Troitiño D.
Publication year - 1988
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.1250190209
Subject(s) - dephasing , raman spectroscopy , chemistry , hexane , relaxation (psychology) , vibrational energy relaxation , molecular vibration , infrared , analytical chemistry (journal) , molecule , organic chemistry , physics , condensed matter physics , optics , psychology , social psychology
The reorientational and vibrational correlation functions of the carbonyl stretching mode of ethyl trifluoroacetate have been determined from its infrared and Raman band shapes in solution in hexane, CCl 4 , CS 2 and CHCl 3 . Reorientational motion is less hindered in hexane and CCl 4 than in CS 2 or CHCl 3 . Kubo and Rothschild's and Oxtoby's stochastic theories have been applied to describe the experimental correlation functions. An intermediate modulation regime is observed in the solvents used. The fastest modulation corresponds to CS 2 . Fisher and Laubereau's isolated binary collision model for vibrational dephasing does not account for the observed vibrational widths.