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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/20980
Title: Fast photoprocesses in a symmetric indotricarbocyanine dye (hitc) in solutions
Authors: Samtsov, M. P.
Tikhomirov, S. A.
Buganov, O. V.
Kaplevsky, K. N.
Melnikov, D. G.
Lyashenko, L. S.
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2009
Citation: Journal of Applied Spectroscopy. - 2009. - № 6. - С. 783-790.
Abstract: Spectral-kinetic and photochemical properties of HITC dye with iodide and perchlorate counterions have been studied in environments where the dye molecules exist in different ionic forms. In ethanol, the dye molecules exist as free ions; in dichlorobenzene, as contact ion pairs. Superfast transformation of non-stationary spectra in an HITC dye bleaching band is found. The observed effects are interpreted within the framework of concepts on "burning out" a notch in the contour of a non-uniformly widened vibronic band of S0 → S1-absorption. Qualitative differences in recorded absorption spectra from the dye excited electronic states for weakly and highly polar solvents are found. It is shown that the observed differences are caused by superfast charge transfer in the contact ion pairs that results in the formation of free radicals.
URI: http://elib.bsu.by/handle/123456789/20980
Appears in Collections:Статьи сотрудников НИИ ПФП

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