Logo BSU

Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/20973
Title: Generation of singlet oxygen by indotricarbocyanine dyes in low-polarity media
Authors: Samtsov, M. P.
Voropai, E. S.
Kaplevskii, K. N.
Mel’nikov, D. G.
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2008
Citation: Journal of Applied Spectroscopy. - 2008. - № 5. - С. 692-699.
Abstract: We present the results of a study of the spectral luminescence properties of three groups of indotricarbocyanine dyes, each of which is formed from compounds with the same cation and different anions. In high-polarity solvents, in the absorption and emission spectra of the dyes we see one type of center; in low-polarity solvents, due to the presence of different ionic forms of the dyes (free ions, contact ion pairs), we observe either one type or two types of centers. By analysis of the luminescence of molecular oxygen in the 1.27 µm spectral region, we determined the efficiency of photosensitization of 1O2 formation by dyes in deuterated solvents. We have shown that in low-polarity solvents, the yield for singlet oxygen generation is higher for indotricarbocyanine dyes which are found in the contact ion pair state and which also contain a heavy atom (I) in the anion. We have observed that an increase in the fraction of contact ion pairs in solution as the dye concentration increases or when an additional salt is introduced leads to an increase in the quantum yield for generation of singlet oxygen. In polar deuterated acetonitrile, the counterion has no effect on the efficiency of photosensitization of oxygen by the dyes.
URI: http://elib.bsu.by/handle/123456789/20973
Appears in Collections:Статьи сотрудников НИИ ПФП

Files in This Item:
File Description SizeFormat 
2008Generation of singlet oxygen by indotricarbocyanine dyes in low-polarity media).pdf182,4 kBAdobe PDFView/Open


PlumX

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.