Koyuncu, Fatma BaycanKoyuncu, SermetOzdemir, Eyup2025-01-272025-01-2720111566-11991878-5530https://doi.org/10.1016/j.orgel.2011.06.023https://hdl.handle.net/20.500.12428/24332A 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. (C) 2011 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessPoly-2,7-carbazolesElectrochemical polymerizationElectrochromic polymersArticle12101701171010.1016/j.orgel.2011.06.023Q1WOS:000293591500017