Abstract

A novel unsymmetrical photochromic diarylethene, 1‐[2‐methyl‐5‐phenyl‐3‐ thienyl]‐2‐[2‐methyl‐5‐(3‐fluoro‐4‐chloro)phenyl‐3‐thienyl]perfluorocyclo‐pentene, was designed and constructed successfully. Its photochemical properties, including photochromic, fluorescence behavior and kinetics, have been investigated systematically. The results indicated that its photochromic behavior could be modulated by UV/V is light, changing from colorless to blue in hexane. What is more, the kinetic experiments illustrated that the cyclization/ cycloreversion process of this diarylethene were determined to be the zeroth/first reaction.

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