Determination of the parameters of associates in dimethylformamide using stimulated low-frequency Raman scattering

Mikhail A. Shevchenko; Nikolay V. Tcherniega; Anna D. Kudryavtseva; Tatiana V. Mironova; Evgenia A. Slyusareva; Mishik A. Kazaryan

doi:10.1117/12.2550825

11 December 2019 Determination of the parameters of associates in dimethylformamide using stimulated low-frequency Raman scattering

Mikhail A. Shevchenko, Nikolay V. Tcherniega, Anna D. Kudryavtseva, Tatiana V. Mironova, Evgenia A. Slyusareva, Mishik A. Kazaryan

Author Affiliations +

Proceedings Volume 11322, XIV International Conference on Pulsed Lasers and Laser Applications; 113222H (2019) https://doi.org/10.1117/12.2550825
Event: XIV International Conference on Pulsed Lasers and Laser Applications (AMPL-2019), 2019, Tomsk, Russian Federation

Abstract

Stimulated low-frequency Raman scattering (SLFRS) spectrum in dimethylformamide (DMF) was registered in the range from 0.1 to 1 cm-1. SLFRS is a result of the laser pulses interaction with acoustic oscillations of the associates, therefore knowledge of the SLFRS frequency shifts (and consequently associates eigenvibrations frequencies) gives possibility to estimate the size of DMF associates. Scattering was excited by pulses of a ruby laser with a narrow spectral line and recorded by Fabri-Perot interferometers. In the scattering spectrum SLFRS component was recorded with a frequency shift of 0.33 cm–1 (10 GHz), which corresponds to the size of associates of about 150 nm. Simultaneously with the SLFRS, stimulated Brillouin scattering was recorded in the backward scattering spectrum.

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Mikhail A. Shevchenko, Nikolay V. Tcherniega, Anna D. Kudryavtseva, Tatiana V. Mironova, Evgenia A. Slyusareva, and Mishik A. Kazaryan "Determination of the parameters of associates in dimethylformamide using stimulated low-frequency Raman scattering", Proc. SPIE 11322, XIV International Conference on Pulsed Lasers and Laser Applications, 113222H (11 December 2019); https://doi.org/10.1117/12.2550825

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