Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (4): 961-968.doi: 10.3866/PKU.WHXB201601047

• ARTICLE • Previous Articles     Next Articles

Effects of Monomer Molar Ratio on the Electrochemical and Electrochromic Properties of Copolymers

Bin HU1,*(),Pei WANG1,Xiao-Jing Lü2,Ping-Jing WANG2,Yu-Yu DAI2,Mi OUYANG2,*()   

  1. 1 Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University, Zhoukou 466001, Henan Province, P. R. China
    2 College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2015-11-23 Published:2016-04-07
  • Contact: Bin HU,Mi OUYANG;
  • Supported by:
    the National Natural Science Foundation of China(51203138, 51273179);Key Scientific and Technological Project of Henan Province, China(152102210156)


Copolymers were prepared by electropolymerization using different feed ratios of 6-(3, 6-di(thiophen-2-yl)-9H-carbazol-9-yl)hexyl ferrocenecarboxylate (BTC-H-Fc) and 3, 4-ethoxylenedioxythiophene (EDOT). The structure and performance of copolymers were characterized by electrochemical measurements, Fourier transform infrared (FT-IR) spectroscopy, and spectroelectrochemistry. The results showed that all the copolymers could exhibit desirable electrochemical features. Spectroelectrochemical studies indicated that P(BTC-H-Fc: EDOT)-1 was light green at the neutral state, and changed to green and then purple with increasing applied potential. P(BTC-H-Fc:EDOT)-4 possessed outstanding color-changing ability; its colors included chocolate brown, yellow brown, green, blue, and purple. P(BTC-H-Fc:EDOT)-8 could be chocolate brown, gray black, blue green, and sky blue. All the copolymer films possessed favorable optical contrast, switching time, and coloration efficiency, laying the foundation for their potential applications in electrochromic device.

Key words: Conjugated polymer, Electrochromism, Ferrocene, Electropolymerization, Coloration efficiency