A Multichromic Copolymer Based on 4-(9H-carbazol-9-yl)- N,N-diphenylaniline and 3,4-ethylenedioxythiophene Prepared via Electrocopolymerization

作者：Ouyang, Mi^*; Fu, Zhiyan; Lv, Xiaojing; Hu, Bin; Wang, Pingjing; Huang, Senbiao; Dai, Yuyu; Zhang, Cheng

来源：Journal of the Electrochemical Society, 2013, 160(11): H787-H792.

DOI：10.1149/2.103310jes

• ELECTROCHROMIC MATERIAL
• CONJUGATED POLYMERS
• FILMS
• DERIVATIVES
• ELECTRODES
• OXIDATION

Copolymer based on 4-(9H-carbazol-9-yl)-N,N-diphenylaniline (CDPN) and 3,4-ethylenedioxythiophene (EDOT) was electrochemically synthesized and characterized. Through electrochemical methods, FTIR spectroscopy and scanning electron microscopy (SEM) analysis, the resulting polymer was confirmed to be a copolymer rather than a blend or a composite of the respective homopolymers. Besides, the spectroelectrochemical and electrochromic properties of the copolymer (P(CDPN-co-EDOT)) films were investigated. According to the spectroelectrochemical analysis, the copolymer film revealed distinct electrochromic properties with four colors: claret red, green, cadetblue, and blue. At the neutral state of the copolymer, the pi-pi* transition absorption peak was located at 530 nm and the energy gap was calculated as 1.67 eV. The copolymer film showed a maximum optical contrast (Delta T%) of 36% in visible region with a switching time of 1.8 s and 43% in the near-IR region with a switching time of 2.5 s. The coloration efficiency (CE) of P(CDPN-co-EDOT) were calculated to be 332 cm(2) . C-1 (at 530 nm), 277 cm(2) . C-1 (at 810 nm) and 552 cm(2) . C-1 (at 1100 nm). Repeated cyclic voltammograms indicated that the copolymer had reasonable stability because of the existence of EDOT units.

• 出版日期2013
• 单位浙江工业大学