Synthesis and photophysical properties of structural isomers of novel 2,10-disubstituted benzofuro[2,3-e]naphthoxazole-type fluorescent dyes |
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Authors: | Haruka Egawa OoyamaToshihiko Hino Takehiro SakamotoTakahiro Yamaguchi Katsuhira Yoshida |
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Affiliation: | a Department of Applied Science, Graduate School of Integrated Arts and Science, Kochi University, Akebono-cho, Kochi 780-8520, Japan b Department of Applied Science, Faculty of Science, Kochi University, Japan |
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Abstract: | Structural isomers of novel 2,10-disubstituted benzofuro[2,3-e]naphthoxazole fluorescent dyes have been synthesized. The phtophysical properties have been investigated in solution and in the solid state. The absorption and fluorescence intensities of the naphth[1,2-d]oxazoles are much stronger than those of the naphth[2,1-d]oxazoles in solution. Moreover, in the solid state, the emission intensities of the former are typically much stronger than those of latter isomers. To understand the differences in photophysical properties, semi-empirical molecular orbital calculations and the X-ray crystallographic analyses have been performed. |
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Keywords: | Fluorescent dye Photophysical property Substituent effect Solid-state fluorescence Crystal structure Structual isomers |
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