Study on Photochromic Compounds with Synthesis Photochromic Diarylethenes Based on Five-Membered Heterocycle and Benzenze Ring

Abstract

A novel photochromic diarylethene 1-{[2-methyl-5-formyl-3-thieny}-2-[2-methyl-5-(2-cyanophenyl)-3-thienyperfluorocyclopentene (1o) has been synthesized for the examination of its properties including photochromism, fluorescence properties and optical recording. The concentration effect in hexane solution was investigated also. The result indicated that the diarylethene 1o changed the color from colorless to royalblue upon irradiation with 297 nm UV light, in which absorption maxima were observed at 592 and 603 nm in hexane and PMMA film, respectively. The colorless open form with fluorescence character could be regenerated by irradiation with visible light. In hexane solution, when the concentration at 2 × 10-5 mol/L the fluorescence peak have the maximum. The cyano group and its substituted position can availably modulate the optical and electrochemical behaviours of these diarylethene derivatives. In addition, polarization optical recording using this diarylethene as recording medium was performed successfully.