Abstract
The results of quantum-chemical calculations of absorption, fluorescence, and induced T-T absorption spectra and the rate constants of photophysical processes for the monomer and dimers of the 3,3′-diethylthiacarbocyanine cation are presented. It has been shown that the formation of the dimers leads to a substantial reduction in the efficiency of the radiative pathways and enhancement of the efficiency of the non-radiative pathways of deactivation of the fluorescent state, thereby resulting in a decrease in the quantum yield of fluorescence. The fluorescence quantum yield depends in this case on the relative orientation of the molecules in the dimer with respect to each other. The calculation results satisfactorily describe experimental data on the spectral and luminescent properties of the dimers of the 3,3′-diethylthiacarbocyanine cation and their photophysical processes.
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Proceedings of the Symposium on Molecular Photonics Devoted to the Memory of Academician A. N. Terenin (St. Petersburg, June 25–27, 2009)
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Bazyl’, O.K., Artyukhov, V.Y. & Mayer, G.V. Photophysical processes in dimers of thiacarbocyanine cations. High Energy Chem 44, 113–120 (2010). https://doi.org/10.1134/S0018143910020050
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DOI: https://doi.org/10.1134/S0018143910020050