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CSJ Journals

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2009, Vol.82, No.1

118-120

Photoinduced Proton Transfer in 2-(2′-Hydroxynaphthalenyl)benzoxazole: Observation of Fluorescence with a Small Stokes Shift Induced by Excited-State Intramolecular Proton Transfer

Kanda Tomoko 1 , Momotake Atsuya 1 , Shinohara Yoshihiro 2 , Sato Tomoo 1 , Nishimura Yoshinobu 1 , Arai Tatsuo 1
1 Graduate School of Pure and Applied Sciences, University of Tsukuba
2 Research Facility Center for Science and Technology, University of Tsukuba
https://doi.org/10.1246/bcsj.82.118

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Abstract
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2-(2′-Hydroxynaphthalenyl)benzoxazole (1) emits fluorescence with small Stokes shift from its excited tautomer (K*), produced by excited-state intramolecular proton transfer. Intramolecular hydrogen bonding may be responsible for this phenomenon on comparison with the results of 2-(2′-hydroxyphenyl)benzoxazole (HBO) and 2-(naphthalene-1-yl)benzoxazole (2) as a reference compound.

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