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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 29, Number 4
BKCSDE 29(4)
April 20, 2008 

A New Diarylethene with Donor-acceptor Group for Reversible Photo-induced Electrochemical Switching
Eunkyoung Kim*, Miyoung Kim, Kyongtae Kim†
Photochromism, Diarylethene, Ring cyclization, Ring opening, Photo-electrical switching
A new diarylethene compound with donor and acceptor substituent was synthesized from 2,3-bis(2-methylbenzo[ b]thiophene-3-yl)hexafluorocyclopentene (BTF) 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.
827 - 832
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