Abstract
A symmetrical photochromic diarylethene, 1,2-bis-[2-methyl-5-(2,4-fluorophenyl)-3-thienyl]perfluorocyclopentene (1a), has been synthesized. Its photochemical properties, including photochromic behavior and fluorescent features, have been investigated in detail. The compound showed good photochromism both in solution and in solid state. Especially, the diarylethene exhibited a relatively strong fluorescence switches along with the photochromism from open-ring isomers to closed-ring isomers in solid state. When irradiated by UV light, the photocyclization reaction was occurred and the emission intensity of the diarylethene decreased significantly, due to producing the non-fluorescence closed-ring isomers. The back irradiation by appropriate wavelength visible light regenerated its open-ring isomers and recovered the original emission intensity. The cycles of fluorescence switching can be repeated ca. 10 times and the efficiency of photo-switching almost keeps as same as that of original value. The results demonstrated that the diarylethene can potential act as a system for reversible data processing using fluorescence as the detection method.
Published Version
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