期刊
POLYMERS
卷 9, 期 5, 页码 -出版社
MDPI AG
DOI: 10.3390/polym9050173
关键词
nitrotriphenylamine; electrochemistry; thiophene derivatives; electrochromism; spectroelectrochemistry
资金
- National Natural Science Foundation of China [51473074, 31400044]
- Natural Science Foundation of Shandong Province [ZR 2014JL009]
- open foundation of State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum
In this study, four novel donor-acceptor systems, 4-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-N-(4-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)phenyl)-N-(4-nitrophenyl)aniline (NETPA), 4-(4-methoxythiophen-2-yl)-N-(4-(4-methoxythiophen-2-yl)phenyl)-N-(4-nitrophenyl)aniline (NMOTPA), 4-(4-methylthiophen-2-yl)-N-(4-(4-methylthiophen-2-yl)phenyl)-N-(4-nitrophenyl)aniline (NMTPA) and 4-nitro-N, N-bis(4-(thiophen-2-yl)phenyl)aniline (NTTPA), were successfully synthesized by Stille coupling reaction and electropolymerized to obtain highly stable conducting polymers, PNETPA, PNMOTPA, PNMTPA and PNTTPA, respectively. The polymers were characterized using cyclic voltammetry (CV), step profiling and UV-Vis-NIR spectroscopy. The band gaps (E-g values) were 1.34, 1.59, 2.26, and 2.34 eV, for PNETPA, PNMOTPA, PNMTPA and PNTTPA, respectively. In addition, electrochromic switching showed that all polymers exhibit outstanding optical contrasts, high coloration efficiencies and fast switching speeds in the near-infrared region (NIR). These properties make the polymers suitable materials for electrochromic applications in NIR region.
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