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Picosecond coherent anti-Stokes Raman scattering (CARS) study of vibrational dephasing of carbon disulfide and benzene in solutionThe vibrational dephasing of the 656/cm mode (nu1, a1g) of CS2 and the 991/cm mode (nu2, a1g) of benzene have been studied as a function of concentration in mixtures with a number of solvents using a ps time-resolved CARS technique. This technique employs two tunable synchronously-pumped mode-locked dye lasers in a stimulated Raman pump, coherent anti-Stokes Raman probe time-resolved experiment. Results are obtained for CS2 in carbon tetrachloride, benzene, nitrobenzene, and ethanol and for benzene nu2 in CS2. The dephasing rates of CS2 nu1 increase on dilution with the polar solvents and decrease or remain constant on dilution with the nonpolar solvents. The CS2/benzene solutions show a contrasting behavior, with the CS2 nu1 dephasing rate being nearly independent of concentration whereas the benzene nu2 dephasing rate decreases on dilution. These results are compared to theoretical models for vibrational dephasing of polyatomic molecules in solution.
Document ID
19870039399
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Perry, Joseph W.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena; NBS, Molecular Spectroscopy Div., Gaithersburg MD, United States)
Woodward, Anne M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Stephenson, John C.
(NBS, Molecular Spectroscopy Div., Gaithersburg MD, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Chemistry And Materials (General)
Accession Number
87A26673
Distribution Limits
Public
Copyright
Other

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