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On the non‐zero depolarization ratio in totally symmetric modes of molecules with cubic point group symmetry
Author(s) -
Hecht Lutz
Publication year - 1991
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.1250220809
Subject(s) - depolarization ratio , raman spectroscopy , depolarization , polarization (electrochemistry) , molecular physics , chemistry , intermolecular force , formalism (music) , molecule , physics , condensed matter physics , optics , quantum mechanics , medicine , art , musical , visual arts , endocrinology
Imperfections in the incident laser beam polarization modulation technique in linear polarization Raman measurements are calculated on the basis of the Stokes‐Mueller formalism. An equation for the depolarization ratio in totally symmetric Raman bands of molecules with cubic point group symmetry is derived, yielding a depolarization ratio of ρ′ obs. = 1.38 × 10 −3 for the ν 1 CCl stretching vibration in the C 35 Cl 4 species. The comparison of the computed depolarization ratio with the smallest experimental value reported so far, ρ obs. = 2.30 × 10 −3 , implies that recent attempts to explain the observation of a non‐zero depolarization ratio for the ν 1 mode in liquid CCl 4 by intermolecular interactions present in the condensed phase are less relevant than suggested.