Coumarinyl(thienyl)thiazoles: novel photochromes with modulated fluorescence |
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Authors: | Traven Valery F Bochkov Andrei Y Krayushkin Mikhail M Yarovenko Vladimir N Nabatov Boris V Dolotov Sergei M Barachevsky Valery A Beletskaya Irina P |
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Institution: | Mendeleev University of Chemical Technology, Moscow 125047, Miusskaya sq., 9, Russian Federation. traven@muctr.ru |
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Abstract: | Novel photochromic 5-(3'-coumarinyl)-4-(3'-thienyl)thiazoles have been synthesized. These compounds display intensive fluorescence emission in the open form A, which is modulated by light. Fluorescence intensity decreases significantly upon irradiation of A with UV-light (lambda<400 nm) due to formation of the cyclic form B. Irradiation of B with visible light (lambda>470 nm) promotes its opening and the recovering of fluorescence. Novel dihetarylethenes undergo photochromic modulation of fluorescence both in solution and in polymeric matrices. |
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