Fluorescent aggregates of cation-anionic polymethine dyes with simple structures |
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| Authors: | Kh S Dzhulibekov A S Tatikolov R Kh Dzhumadinov N Nizamov Zh A Krasnaya |
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| Institution: | (1) A. Navoi State University of Samarkand, 15 Universitetsky bulvar, 703004 Samarkand, Uzbekistan;(2) N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977 Moscow, Russian Federation;(3) N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 117913 Moscow, Russian Federation |
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| Abstract: | The absorption, fluorescence, and excitation spectra of two cation-anionic dyes with simple structures, which have the identical anions and variable cations, were studied in weakly polar and nonpolar solvents as well as in binary mixtures of solvents with different polarity. Under these conditions heterogeneous fluorescent aggregates were found at 20 °C. The structure of the cation has a significant influence on the formation and properties of the aggregates of cation-anionic polymethine dyes.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 476–480, March, 1995. |
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| Keywords: | fluorescence and absorption spectra cation-anionic polymethine dyes aggregates ion pairs |
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