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Citation: WANG Xue-Mei, SHI Chen, XIAO Yin-Bo, WEI Bin, SUN Yue-Ming, QI Zheng-Jian. Synthesis and Electrochemical Characteristics of 3-Alkylthiophene Copolymers[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 707-710. shu

Synthesis and Electrochemical Characteristics of 3-Alkylthiophene Copolymers

1.
College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189

Corresponding author: QI Zheng-Jian,
Received Date: 23 June 2008
Available Online: 9 September 2008
Fund Project: “九七三”基础研究发展计划(2007CB936300) (2007CB936300)国家科技支撑(2007BAK26B06) (2007BAK26B06)江苏省研究生创新基金(1107040024)资助项目 (1107040024)

A series of 3-alkylthiophene copolymers,poly[(2,4-bisvinyl-3-hexylthiophene-co-2,5-bisphenyl-1,3,4-oxadiazole](P3HT-OXD),poly[(2,4-bisvinyl-3-octylthiophene)-co-2,5-bisphenyl-1,3,4-Oxa-diazole)](P3OT-OXD),poly[(2,4-bisvinyl-3-hexylthiophene)-co-2,6-pyridine](P3HT-Py),and poly[(2,4-bisvinyl-3-octylthiophene)-co-2,6-pyridine](P3OT-Py) were synthesized by Heck Coupling approach.Their structures were characterized by NMR and gel permeation chromatography(GPC).The photoelectric properties were investigated using cyclic voltammetry and UV-Vis spectroscopy.The results indicated that the ionization potential(I_p) and band gap(E_g) of the copolymers were reduced with an increase of the length of the alkyl chain.The band gap of P3OT-OXD was 0.11 eV lower than that of P3HT-OXD,and the band gap of P3OT-Py was 0.19 eV lower than that of P3HT-Py.Electron affinity(E_a) of polythiophene containing 1,3,4-oxadiazole in main chain was comparatively high,which will be avail to enhance electron-transpo-rting effect and improve the balanced rates for electron and hole injection.
- polythiophene,
- cyclic voltammetry,
- electron affinity,
- ionization potential,
- band gap
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