| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1267613 | Organic Electronics | 2011 | 10 Pages |
A new poly-2,7-di-2-thienyl-9H-carbazole derivative (poly(TCT-N)) bearing nitro (–NO2) subunit has been reported. The electrochemical and optical properties of TCT-N monomer and its polymer have been compared to the 9-phenyl-2,7-di-2-thienyl-9H-carbazole (TCT) standard molecule. Cyclic voltammetry revealed that TCT-N and TCT have excellent polymerization activity; due to extended conjugation with the attached thiophene unit and also their low oxidation potentials. The oxidation potential of TCT-N is higher than that of TCT, because of electro-withdrawing effect of –NO2 moiety. Besides, the TCT-N polymeric film prepared via electrochemical process exhibits a multi-electrochromic behavior compared with TCT standard molecule. The electroactive orange color of poly-TCT-N film converted respectively to green, turquoise and dark blue upon applied positive potentials. Consequently, the polymeric electrochrome exhibits multi-electrochromic behavior, high redox stability, high coloration efficiency and reasonable response time for electrochromic applications.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We report here electrochemical synthesis of a new 2,7 linked polycarbazole derivative containing the –NO2 substituent. ► Synthesized monomer has excellent polymerization activity; due to extended conjugation with the attached thiophene unit. ► The polymeric film exhibits multi-electrochromic behavior, high redox stability, high coloration efficiency.
