Spectral-Luminescent Properties of Neutral and Ionic Cresols |
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| Authors: | Email author" target="_blank">O?N?ChaikovskayaEmail author T?V?Sokolova I?V?Sokolova |
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| Institution: | (1) Academician V. D. Kuznetsov Siberian Physical-Technical Institute, Tomsk State University, 1 Novosobornaya Sq., Tomsk, 634050, Russia;(2) Tomsk State University, Tomsk, Russia |
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| Abstract: | The spectral characteristics of various forms (neutral, anionic, and cationic) of o- and p-cresols in water have been investigated by electron-absorption spectroscopy, fluorescence, and quantum-chemistry methods. The presence of a methyl substituent in cresol in the orthostate enhances the acid and base properties of this substance in the excited state as compared to those of cresol in the parastate. The difference between the mechanisms of formation of cationic o- and p-cresols is explained by the inversion of electron levels in the system of electron-excited states. Ionic cresols have a low quantum yield of fluorescence (≤10−2) because the efficiency of intercombination conversion in them is higher as compared to that of neutral cresols.__________Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 2, pp. 165–170, March–April, 2005. |
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| Keywords: | o-cresol p-cresol ionic forms of cresols fluorescence |
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