Multichromic benzimidazole‐containing polymers: Comparison of donor and acceptor unit effects |
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| Authors: | Ayda Goycek Nurioglu Hava Akpinar Merve Sendur Levent Toppare |
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| Institution: | 1. Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey;2. Department of Polymer Science and Technology, Middle East Technical University, 06800 Ankara, Turkey;3. The Center for Solar Energy Research and Application (GüNAM), Middle East Technical University, 06800 Ankara, Turkey;4. Department of Biotechnology, Middle East Technical University, 06800 Ankara, Turkey |
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| Abstract: | This study reports a comparative study on electrochromic properties of two donor–acceptor–donor (DAD)‐type polymers namely poly(2‐heptyl‐4,7‐di(thiophen‐2‐yl)‐1H‐benzo d]imidazole) (BImTh) and poly(4,7‐bis(2,3‐dihydrothieno3,4‐b] 1,4]dioxin‐5‐yl)‐2‐heptyl‐1H‐benzod]imidazole) (BImEd). DAD‐type monomers were polymerized electrochemically on indium tin oxide‐coated glass slides to determine the optical properties of the polymers. Electrochemical p‐doping experiments were performed to determine the band gap and absorption band values of the polymer films at different redox states. Polymerization of BImTh and BImEd yields multichromic polymers. Donor and acceptor effects are studied by comparing the PBImEd and PBImTh with corresponding benzotriazole derivatives. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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| Keywords: | benzimidazole conjugated polymers donor‐acceptor theory electrochemistry electrochromism functionalization of polymers thin films |
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