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Selective nonspecific solvation under dielectric saturation and fluorescence spectra of dye solutions in binary solvents

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Abstract

The influence of selective nonspecific solvation on the fluorescence spectra of three substitutedN-methylphthalimides in a binary solvent system consisting of a nonpolar (n-heptane) and a polar (pyridine) component has been studied under conditions close to dielectric saturation. The substantially nonlinearity of the effect is confirmation that the spectral shifts of fluorescence bands depend on the number of polar solvent molecules involved in solvating the dye molecule. The measured fluorescence spectral shifts determined by substituting one nonpolar solvent molecula with a polar one in the proximity of the dye molecule agree quantitatively with the forecasts of the previously proposed semiempirical theory which describes this nonlinear solvation phenomenon.

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Authors and Affiliations

  1. Vavilov State Optical Institute, 199034, Leningrad, USSR

    N. G. Bakhshiev & M. B. Kiselev

Authors
  1. N. G. Bakhshiev
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  2. M. B. Kiselev
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Bakhshiev, N.G., Kiselev, M.B. Selective nonspecific solvation under dielectric saturation and fluorescence spectra of dye solutions in binary solvents. J Fluoresc 1, 177–181 (1991). https://doi.org/10.1007/BF00865364

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  • DOI: https://doi.org/10.1007/BF00865364

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