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- W2023004324 abstract "Preferential solvation of solvatochromic probe coumarin 153 has been studied in toluene−acetonitrile and toluene−methanol solvent mixtures. Solvatochromic shifts of absorption and fluorescence spectra of coumarin 153 in these nonideal systems are analyzed as a function of solvent polarity. There is no apparent preferential solvation of coumarin 153 in the ground state. For the excited-state molecule preferential solvation is observed in toluene−acetonitrile mixtures and it is confirmed by a theoretical model. For the excited C153 in toluene−methanol mixtures strong nonlinearity in the fluorescence solvatochromic shifts is attributed mainly to formation of a hydrogen bond between methanol and C153. IR spectra of C153 in solvent mixtures containing methanol confirm formation of a hydrogen bond between methanol and C153. The presence of a hydrogen-bonded C153 in toluene−methanol mixtures causes an unusual dependence of the C153 fluorescence lifetime on the mole fraction of methanol in solution." @default.
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- W2023004324 date "2002-02-05" @default.
- W2023004324 modified "2023-10-17" @default.
- W2023004324 title "Preferential Solvation of Coumarin 153The Role of Hydrogen Bonding" @default.
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- W2023004324 doi "https://doi.org/10.1021/jp013916g" @default.
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