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A new unsymmetrical photochromic diarylethene 1- (2-methyl-5- trimethylsilacetenyl-3-thienyl)-2-(2-Cyanophenyl) perfluorocyclopentene (1o) were synthesized. Under alternating irradiation with UV and visible light, the compounds showed favorable photochromism in hexane. The product changing from colorless to orange after irradiation with 297 nm UV light, and the product has been characterized by UV/Vis spectrophotometry, Fluorescence spectrophotometry. The cyclization processes of compound(1c)belong to the zero order reaction. Keywords-diarylethene; kinetics; photochromic

Synthesis and Properties of Unsymmetry Diarylethene 1-[2-methyl-5- trimethylsilacetenyl-3-thienyl]-2-[2-Cyanophenyl] Perfluorocyclopentene