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Fluorescence Depolarization Kinetics of Neutral and Charged 2-(3′-Pyridyl)oxazole

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Abstract

The results of measurements of the starionary and time-resolved flurescence anisotropy and of the AM1 and INDO/S calculations were used for conformational analysis of a neutral molecule of the 2-(3′-pyridyl)oxazole series and of its N-ethyl cation. Most probably, the excitation of the quasi-planar rotamers of the cation, in contrast to the neutral molecule, is accompanied by a ∼90° turn of its Et-py fragment with the formation of a twisted charge-transfer conformation. According to the data obtained for ethanol and glycerol solutions and for the poly(methyl methacrylate) matrix at 20°C, the efficiency of the intramolecular relaxation is independent of the viscosity.

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Authors and Affiliations

  1. Moscow State University, Moscow, Russia

    V. V. Volchkov & M. V. Rusalov

  2. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

    G. V. Dem’yanov & T. I. Syreishchikova

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  1. V. V. Volchkov
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  2. G. V. Dem’yanov
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  3. M. V. Rusalov
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  4. T. I. Syreishchikova
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Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 5, 2005, pp. 836–840.

Original Russian Text Copyright © 2005 by Volchkov, Dem’yanov, Rusalov, Syreishchikova.

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Volchkov, V.V., Dem’yanov, G.V., Rusalov, M.V. et al. Fluorescence Depolarization Kinetics of Neutral and Charged 2-(3′-Pyridyl)oxazole. Russ J Gen Chem 75, 790–794 (2005). https://doi.org/10.1007/s11176-005-0319-6

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  • DOI: https://doi.org/10.1007/s11176-005-0319-6

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