Acta Chim. Sinica ›› 2014, Vol. 72 ›› Issue (12): 1238-1244.DOI: 10.6023/A14060463 Previous Articles     Next Articles



侯影飞a, 徐刚强a,b, 赵金生b, 孔瑛a, 杨冲a   

  1. a. 中国石油大学(华东)重质油国家重点实验室 青岛 266580;
    b. 聊城大学化学化工学院 聊城 252059
  • 投稿日期:2014-06-13 发布日期:2014-11-07
  • 通讯作者: 赵金生
  • 基金资助:


Electrosynthesis and Characterization of the Donor-Acceptor Type Multicolored Electrochromic Materials

Hou Yingfeia, Xu Gangqianga,b, Zhao Jinshengb, Kong Yinga, Yang Chonga   

  1. a. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), QingDao 266580;
    b. Department of Chemistry and Chemical Engineering, LiaoCheng University, LiaoCheng 252059
  • Received:2014-06-13 Published:2014-11-07
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 51473074), the General and Special Program of the Postdoctoral Science Foundation of China (Nos. 2013M530397, 2014T70861).

Two novel monomer were synthesized via Stille cross coupling reaction. Electropolymerization of the monomers gave birth to the donor-acceptor type polymers: poly{10,13-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl) dibenzo[a,c]phenazine} (P1) and poly{10,13-bis(4-ethylthiophen-2-yl)dibenzo[a,c]phenazine} (P2). Cyclic voltammetry and UV-vis spectroscopy were used to study the electrochemical and optical properties of the polymer films. The surface morphologies of the polymer films were investigated by scanning electron microscopy (SEM). The slight structural modification of the two polymer films results in the variation of the optical and electronic properties. As shown in the studies, P1 film was green in the neutral state, and with the increment of the applied potentials, four different colors were observed (light green, greyish-green, grey and cadet blue). The P1 film had prominent high optical contrast (T%) of 74.8%, excellent response time of 0.6 s and good coloration efficiency (CE) of 285.8 cm2/C at 1600 nm. Electrochromic switching response for polymer film P1 at 470 nm, 790 nm was also monitored. The slight loss in percent transmittance contrast value at the three given wavelengths indicated the stable ability of the polymer film of P1. The colors of polymer film P2 in the neutral and oxidized state were greyish-blue and cadet green, respectively. The optical contrast (T%) of P2 film was found to be 64.5%, the response time was 2.4 s and the coloration efficiency (CE) was 316.7 cm2/C at the wavelength of 1340 nm. P2 film showed high stability at the wavelength of 1340 nm, but at 754 nm the stability was not satisfactory. Moreover, both of the two polymers exhibited low optical bandgap (Eg) (the Eg of P1 was 1.26 eV and the Eg of P2 was 1.54 eV). Both polymer films revealed obvious donor-acceptor behaviors, and they were not only n-dopable but also p-dopable.

Key words: dibenzo[a,c]phenazine, conducting polymers, donor-acceptor behavior, electrochemical polymerization, electrochromism