Abstract
A new photoinduced fluorescent switch based on a photochromic diarylethene, 1-(2-methyl-3-benzothiophenyl)-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyperfluorocyclope-ntene was synthesized and its photochromism was investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to purple upon irradiation with UV light both in solution and in PMMA amorphous film. In acetonitrile, the open-ring isomer of the diarylethene1oexhibited relatively strong fluorescence at 473 nm when excited at 320 nm. The results demonstrated that the diarylethene can be also functioned as a fluorescence switch.
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