Picosecond Coherent Anti-Stokes Raman Scattering (Cars) Study Of Vibrational Dephasing Of Carbon Disulfide And Benzene In Solution

Joseph W. Perry; Anne M. Woodward; John C. Stephenson

doi:10.1117/12.961120

30 June 1986 Picosecond Coherent Anti-Stokes Raman Scattering (Cars) Study Of Vibrational Dephasing Of Carbon Disulfide And Benzene In Solution

Joseph W. Perry, Anne M. Woodward, John C. Stephenson

Author Affiliations +

Proceedings Volume 0620, Laser Applications in Chemistry and Biophysics; (1986) https://doi.org/10.1117/12.961120
Event: O-E/LASE'86 Symposium, 1986, Los Angeles, CA, United States

Abstract

The vibrational dephasing of the 656 cm-1 mode (v1, alg) of carbon disulfide and the 991 cm-1 mode (v2, alg) of benzene have been studied as a function of concentration in mixtures with a number of solvents using a picosecond 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 v2 in CS2. The dephasing rates of CS2 vl 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 vl dephasing rate being nearly independent of concentration whereas the benzene v2 dephasing rate decreases on dilution. These results are compared to theoretical models for vibrational dephasing of polyatomic molecules in solution.

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Joseph W. Perry, Anne M. Woodward, and John C. Stephenson "Picosecond Coherent Anti-Stokes Raman Scattering (Cars) Study Of Vibrational Dephasing Of Carbon Disulfide And Benzene In Solution", Proc. SPIE 0620, Laser Applications in Chemistry and Biophysics, (30 June 1986); https://doi.org/10.1117/12.961120

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