L. Xu et al. / Electrochimica Acta 56 (2011) 2815–2822
2821
tion of the monomer in 0.2 M NaClO4/ACN solution. The obtained
polymer film is studied by cyclic voltammetry, UV–vis and FT-IR
spectra, scanning electron microscopy. Electrochromic properties
of PBTB film are investigated in detail. Spectroelectrochemistry
reveals that PBTB film has good electrochromic properties (yel-
low color at neutral state and green color at full doped state).
The dual type ECD constructed utilizing PBTB and PEDOT has
reasonable response time (0.43 s) and optical contrast (29.5%) at
628 nm. The CE of the ECD is calculated to be 408.9 cm2 C−1. It
is interesting that this ECD shows green color at neutral state.
These properties make PBTB a good candidate for commercial
applications.
Acknowledgements
Financial supports from the National Natural Science Foun-
dation of China (no. 20906043) and the Taishan Scholarship of
Shandong Province are gratefully acknowledged.
Fig. 11. Open circuit stability of the PBTB/PEDOT ECD monitored at 628 nm.
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1,4-Dis(2-thienyl)-benzene monomer containing benzene and
thiophene units is synthesized by coupling reaction and then
its polymer is successfully synthesized by electrochemical oxida-