Youshan Zhang, Baoyang Lu, Liqi Dong
Dec 1, 2016
Citations
0
Influential Citations
6
Citations
Journal
Electrochimica Acta
Abstract
Abstract The derivative of terthiophene oligomer 2-(2,5-di(thiophen-2-yl)thiophen-3-yl)acetic acid (TTAA) was synthesized, and its electropolymerization was researched comparatively by using three systems (CH 3 CN-Bu 4 NPF 6 , CH 2 Cl 2 -Bu 4 NPF 6 , and BFEE). The effects of solvent on the electrochemical, morphology, redox stability, spectroelectrochemical properties and electrochromic performance of the achieved poly(2-(2,5-di(thiophen-2-yl)thiophen-3-yl)acetic acid) (PTTAA) films were studied in detail. PTTAA could be electrosynthesized in all the three systems facilely and displayed wonderful electroactivity and prominent redox stability in a wide potential window. The PTTAA films obtained in CH 3 CN-Bu 4 NPF 6 and CH 2 Cl 2 -Bu 4 NPF 6 had similar electrochemistry property except morphology. PTTAA formed in BFEE had lower oxidation potential (0.4 V) and better cycling stability. Also, it showed moderate response time (1.2 s) and excellent coloration efficiency (391 cm 2 C −1 ), enhanced its possible application as electrochromic material. So compared with common solvents CH 3 CN and CH 2 Cl 2 , TTAA could electrochemical polymerization at a lower potential and got higher quality polymer films in the strong Lewis acid BFEE. And this also made PTTAA as-formed in BFEE had better redox stability and electrochromic perfromance.