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Depolarized rayleigh wing from Raman spectra and local order in pure C 6 H 6 and C 6 F 6 liquids and in their binary mixtures
Author(s) -
Dayan E.,
Loisel J.,
Berreby L.,
Dervil E.,
PinanLucarré J. P.
Publication year - 1995
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.1250260504
Subject(s) - raman spectroscopy , spectral line , rayleigh scattering , analytical chemistry (journal) , wavenumber , molecule , intensity (physics) , chemistry , binary number , raman scattering , atmospheric temperature range , molecular physics , materials science , optics , physics , thermodynamics , chromatography , arithmetic , mathematics , organic chemistry , astronomy
From Raman spectra, the low‐wavenumber range profile (10‐200 cm −1 ) of planar molecules C 6 H 6 , C 6 F 6 and of their binary mixtures in the liquid state was recorded at intervals of 1°C from 10 to 65°C. The analysis was made using a reduced intensity ratio R involving the integrated intensity of a constructed I(v)v 2 spectrum and the recorded I(v) spectrum. The study of R against a slow and gradual variation of temperature emphasized a break in the gradient for pure liquids. This effect is related to a change in the local environment of the molecules. This break did not appear in the study of a 1:1 mixture owing to its strong stability due to a face‐to‐face configuration.