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Proceedings Paper

Study of photoreduction kinetics of xanthene dyes with intersystem crossing from upper triplet states
Author(s): A. Sizykh; E. Slyusareva; K. Tarbetskaya
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Paper Abstract

Modeling of kinetics of photoprocesses in polyatomic molecules based on four-level energy scheme is carried out. The model includes the processes in dye under cw photoexcitation and takes into account a reverse intersystem crossing and photochemical reaction from the upper triplet states. The analytical time-dependent relation for dye concentration of the initial form was obtained taking into account the contrast of rates of various photoprocesses and using of quasistationary approximation. It was shown that rate constant of photolysis correlates with probability of intersystem crossing of the dyes. For the xanthene dyes in gelatin it was shown that simple experimental method of cw laser photolysis combined with the kinetic model could be effective technique of study of upper excited states participation.

Paper Details

Date Published: 9 July 2007
PDF: 7 pages
Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67272N (9 July 2007); doi: 10.1117/12.752497
Show Author Affiliations
A. Sizykh, Siberian Federal Univ. (Russia)
E. Slyusareva, Siberian Federal Univ. (Russia)
K. Tarbetskaya, Siberian Federal Univ. (Russia)


Published in SPIE Proceedings Vol. 6727:
ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics

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