Benzothiadiazole-based dyes that emit red light in solution,solid, and liquid state |
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Authors: | Tsutomu Ishi-i Miki SakaiChihiro Shinoda |
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Affiliation: | Department of Biochemistry and Applied Chemistry, Kurume National College of Technology, 1-1-1 Komorino, Kurume 830-8555, Japan |
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Abstract: | In this paper, we report the preparation and red-light-emitting behavior of benzothiadiazole–tris(alkyloxy)phenylethene dyes. In solution, we observed an efficient red light emission with high fluorescence quantum yields (up to 0.78). With increase in solvent polarity, the emission bands shifted to longer wavelengths accompanied by a large Stokes shift of up to 152 nm. A moderate fluorescence quantum yield of 0.52 could be achieved even in the polar solvent dimethylformamide. Red light emission with good fluorescence quantum yields (up to 0.50) was also observed in the bulk solid, liquid, and film state. |
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Keywords: | Red light emission Solid-state fluorescence Liquid-state fluorescence Benzothiadiazoles Donor&ndash acceptor |
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