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- W2023185452 abstract "Fluorescence of the isomeric 2-, 3-, and 4-phenylpyridines was induced by forming hydrogen-bonded complexes with trifluoroacetic acid (TFA) in a hydrocarbon solvent. The results indicate a high sensitivity of these molecules for TFA with 1:1 H-bonded formation constants of 0.85×103, 1.59×103, and 1.85×103 M−1, respectively, which increase with the basicity of the azine. In each case induced fluorescence occurs as the result of an excited state H-bond transfer. With 2-phenylpyridine in cyclohexane, complexation converts a nonfluorescent molecule to an H-bonded species with a fluorescence quantum yield of 0.24. The application of these molecules as fluorescence probes for acid molecules in a non-polar solvent is suggested." @default.
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- W2023185452 date "1998-10-01" @default.
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- W2023185452 title "Induced fluorescence of phenylpyridines by hydrogen bonding complexation" @default.
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- W2023185452 doi "https://doi.org/10.1016/s1010-6030(98)00345-1" @default.
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