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Studies on Electrochemical Synthesis of Polythiophene in an Ionic Liquid
Shi Jiahua1,2, Yang Chunhe2, Gao Qingyu*1, Li Yongfang2
1.College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475001;2.Center for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080
Abstract:
Polythiophene(PTh)films were prepared by the direct electropolymerization of thiophene in the ionic liquid,1-butyl-3-methylimidazolium hexafluorophosphate(BMIM)PF6 . The structure and morphology of PTh films were characterized by means of the FT-IR spectrum and the scanning electron microscopy( SEM). The electrical and electrochemical properties of PTh films were examined with the UV-Vis spectrum,cyclic voltammetry(CV) and four-probe method. The results showed that when the potential for electropolymerization was controlled between +1.7 and +1.9 V(vs. Ag/AgCl),very homogeneous PTh films could be prepared in the ionic liquid (BMIM)PF6 used as solvent and electrolyte. The de-doping(reduction)and re-doping(re-oxidation)of the PTh film prepared in ionic liquid are reversible and stable,and the conductivity of PTh films is 0.01-0.1 S/cm.
Key words:  Ionic liquid(BMIM)PF6,Polythiophene,Electrochemical polymerization,Cyclic voltammetry
FundProject:
聚噻吩在离子液体中的电化学合成研究
石家华1,2, 杨春和2, 高青雨*1, 李永舫2
1.河南大学化学化工学院,开封,475001;2.中国科学院化学研究所分子科学中心,北京,100081
摘要:
在1-丁基-3-甲基咪唑六氟磷酸盐离子液体(BMIM)PF6中直接电化学合成制备了聚噻吩膜.通过红外光谱(FT-IR)和扫描电子显微镜(SEM)对聚噻吩膜的结构和形貌进行了表征.利用紫外可见光谱(UV-Vis)、循环伏安法(CV)和四探针法研究了聚噻吩膜的电子和电化学特性.研究结果表明,在电位1.7~1.9 V(相对于Ag/AgCl),在(BMIM)PF6中可以制备均匀的聚噻吩膜,其中,离子液体(BMIM)PF6既作为溶剂又作支持电解质;在离子液体中制备的聚噻吩膜具有良好的稳定性和充放电能力,聚噻吩膜的电
关键词:  离子液体(BMIM)PF6  聚噻吩  电化学聚合  循环伏安法
DOI:10.1088/1674-0068/17/4/503-507
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