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• W2020677277 abstract "Emission and absorption spectra of aniline have been studied in different solvents at 300 K and 77 K. This molecule exhibits broad and structureless fluorescence and poorly resolved phosphorescence in glassy polar ethanol and non-polar methylcyclohexane and n-hexane matrices at 77 K. Unlike the behaviour in a polar medium, fluorescence is found to be more intense than phosphorescence in non-polar media. In contrast to the case of glassy matrices, aniline shows highly stuctured emission and excitation spectra in crystalline cyclohexane and benzene matrices at 77 K. Excited state dipole moment calculation shows that both the singlet states contain charge transfer character, which is responsible for the strong phosphorescence in polar glassy medium. Spectral analysis indicates that the aniline molecule is slightly distorted in both the singlet and triplet states. The marked reduction in phosphorescence intensity of this molecule observed in non-polar matrices, particularly in a benzene crystalline matrix, relative to that in an ethanol matrix, is attributable to the decreased intersystem crossing rate and increased non-radiative rate from the emitting triplet state." @default.
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• W2020677277 date "1992-11-01" @default.
• W2020677277 modified "2023-10-11" @default.
• W2020677277 title "Environmental effects on the absorption and luminescence properties of aromatic amines: Aniline" @default.
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• W2020677277 doi "https://doi.org/10.1016/0584-8539(92)80235-o" @default.
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