Excimer fluorescence of pyrene in sol-gel silica.
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概要
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The fluorescence and excitation spectra of pyrene at high concentrations were studied along the sol to xerogel stages of the sol–gel silica formed by the acidic hydrolysis of tetraethyl orthosilicate. The monomer and excimer fluorescence of pyrene were observed in the reaction system. Their relative intensities revealed that complex changes occurred that depended on the reaction time and the excitation wavelengths. The environmental polarity of the probe molecules also changed as shown by the fluorescence vibronic structure. The excitation spectrum of the excimer fluorescence in some stages was red shifted in comparison with that of the monomer fluorescence, indicating the existence of bimolecular ground-state pyrene associations. The mechanism by which pyrene molecules are trapped in the silica network is discussed on the basis of the results.
- 公益社団法人 日本化学会の論文
著者
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Matsui Kazunori
Department Of Chemistry College Of Engineering Kanto Gakuin University
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Matsui Kazunori
Department of Industrial Chemistry, College of Engineering, Kanto Gakuin University
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Usuki Naomi
Department of Industrial Chemistry, College of Engineering, Kanto Gakuin University
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