A New Diarylethene with Donor-acceptor Group for Reversible Photo-induced Electrochemical Switching

摘要

A new diarylethene compound with donor and acceptor substituent was synthesized from 2,3-bis(2-methyl-benzo[b]thiophene-3-yl)hexafluorocyclopentene (BIT) over 5 steps.The donor-acceptor structured BTF compound (TBTFE) showed spectral change to a longer wavelength through photochromism with a high cyclization quantum yield (0.56).The 3,4-ethylenedioxythiophene (T) and carboethoxy (E) groups directly connected to BTF unit promoted electrical change accompanied with the photoisomerization of the BTF unit.Photo-induced electrical switching was achieved from a photocell containing TBTFE doped polymer film,which showed reversible and stable current change over repeated cycles by the alternative UV/Vis irradiation,as estimated by the I-V plot.