Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (22): 2254-2258. Previous Articles     Next Articles

Original Articles


许贺, 庞月红, 黎小宇, 丁洪流, 程欲晓, 施国跃, 金利通*   

  1. (华东师范大学化学系 上海 200062)
  • 收稿日期:2006-03-20 修回日期:2006-04-17 出版日期:2006-11-28 发布日期:2006-11-28
  • 通讯作者: 金利通

Study on Electrochemical Systhesis and Electrochromism of Poly(3-bromothiophene) in Ionic Liquid

XU He; PANG Yue-Hong; LI Xiao-Yu; DING Hong-Liu; CHENG Yu-Xiao; SHI Guo-Yue; JIN Li-Tong*   

  1. (Department of Chemistry, East China Normal University, Shanghai 200062)
  • Received:2006-03-20 Revised:2006-04-17 Online:2006-11-28 Published:2006-11-28
  • Contact: JIN Li-Tong

Ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM]PF6 has been used as solvent and electrolyte for the preparation of poly(3-bromothiophene) (PBrT) films by galvanostat and cyclic voltammetry. The structure and morphology of PBrT films were characterized by the means of the FT-IR spectrum and the scanning electron microscopy (SEM). The thermal stability of PBrT films has been inves-tigated through thermogravimetry and differential thermal analysis (TG-DTA). The electrochemical and electrochromic properties of PBrT flims were examined with UV-Vis spectrum, chronoamperometry, and chronoabsorptometry. The results showed that the surface morphology of PBrT films prepared in ionic liquid was denser and smoother than those prepared in traditional organic solvent. The PBrT films exhibited outstanding redox reversibility, good charging/discharging capacitance, high electroactive performance and good thermal stability. Electrochromic properties of the PBrT films showed a good color contrast and rapid response time (0.5 s). Ionic liquids exhibited wide electrochemical potential window, high conductivity and recyclability. Therefore, they open a promising field for the electropolymerization and so on.

Key words: ionic liquid [BMIM]PF6, poly(3-bromothiophene), electropolymerization, electrochromism