Solvent effect on fluorescence spectra of a spirooxazine |
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Authors: | Hiromasa Nishikiori Nobuaki Tanaka Katsuhiko Takagi Tsuneo Fujii |
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Institution: | (1) Department of Chemistry, Faculty of Science, Taibah University, Al-MAdinah Al-Munawarah, P.O. Box 30002, Kingdom of Saudi Arabia |
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Abstract: | Fluorescence and excitation spectra of spironaphthoxazine (SNO) in various solvents have been investigated systematically. The fluorescence in low-polar solvents normally originated from SNO in the excited state. In protic high-polar solvents, fluorescence from an excited intermediate species (X*
h) relaxed from a part of the excited SNO by breaking a C-O bond in the oxazine ring was also observed. It has been found that a ground-state intermediate species (Xs), transformed from a part of ground-state SNO, is directly excited to its excited state (Xs
*), which displays fluorescence in aprotic high-polar solvents. |
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Keywords: | FLUORESCENCE SPIROOXAZINE SPIRONAPHTOXAZINE SOLVENT EFFECT PHOTOCHROMISM |
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