Synthesis, Photochromism Properties of A Hybrid Diarylethene Based on Hydroxyl Group

摘要

A novel unsymmetrical diarylethene derivative 1-[2-methyl-5-(3-trifluoromethylphenyl)-3-thienyl]-2-[2-methyl-5-(4-hydroxylphenyl)-3-thienyl]hex afluorocyclopentene (1a) was successfully synthesized.The properties of the compound,including photochromic and fluorescence properties of the diarylethene were also investigated systematically.The results showed that this compound exhibited reversible photochromism,undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light both in solution and in PMMA film,and its absorption maxima were observed at 593 nm in methanol and at 598 nm in PMMA amorphous film,respectively,upon irradiation with 297 nm UV light.In methanol solution,the open-ring isomer of the diarylethene 1 exhibited relatively fluorescence at 569 nm when excited at 360 nm.