Study of photoreduction kinetics of xanthene dyes with intersystem crossing from upper triplet states

A. Sizykh; E. Slyusareva; K. Tarbetskaya

doi:10.1117/12.752497

9 July 2007 Study of photoreduction kinetics of xanthene dyes with intersystem crossing from upper triplet states

A. Sizykh, E. Slyusareva, K. Tarbetskaya

Proceedings Volume 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics; 67272N (2007) https://doi.org/10.1117/12.752497
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

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.

Citation Download Citation

A. Sizykh, E. Slyusareva, and K. Tarbetskaya "Study of photoreduction kinetics of xanthene dyes with intersystem crossing from upper triplet states", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67272N (9 July 2007); https://doi.org/10.1117/12.752497

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