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Dephasing of the ν 1 vibration of isotopic molecules of carbon tetrachloride
Author(s) -
Kirillov Sviatoslav A.
Publication year - 2002
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.832
Subject(s) - dephasing , chemistry , raman spectroscopy , isotropy , line (geometry) , molecular vibration , molecular physics , spectral line , analytical chemistry (journal) , molecule , nuclear magnetic resonance , condensed matter physics , physics , optics , quantum mechanics , organic chemistry , geometry , mathematics
The isotopic structure of the ν 1 line in the isotropic Raman spectrum of liquid carbon tetrachloride was studied. A new fitting procedure was employed enabling one to fit overlapping lines, obtaining dynamic parameters at the same time. The time‐correlation functions of vibrational dephasing were first found for each isotopic species present in the liquid at their natural abundance. The isotopic dependence of the characteristic times of vibrational dephasing and vibrational frequency modulation was analysed. The isotopic dependence of dephasing times is contained primarily in the frequency factor: the dephasing times decrease with decreasing line frequency. This dependence entirely outweighs the opposite relationship between the dephasing times and masses. The frequency modulation times show the same trend, which contradicts the simple collision model. Copyright © 2002 John Wiley & Sons, Ltd.