Syntheses and Optical Properties of Perfluorophenyl Containing Benzimidazole Derivatives: The Effect of Donor Units |
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| Authors: | Merve Ileri Serife O Hacioglu Ali Cirpan |
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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 |
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| Abstract: | Synthesis of two novel donor – acceptor – donor type monomers containing benzimidazole as the acceptor unit and thiophene and 3,4-ethylenedioxythiophene (EDOT) as the donor units were performed. 2-(Perfluorophenyl)-4,7-di(thiophen-2-yl)-1H-benzod]imidazole and 4,7-bis(2,3-dihydrothieno3,4-b]1,4]dioxin-5-yl)-2-(perfluorophenyl)-1H-benzod]imidazole were synthesized successfully and polymerized electrochemically. The electrochemical and spectroelectrochemical studies of the polymers were studied. The effect of electron donating moieties on the optical properties of electrochemically polymerized polymers was investigated. Both polymers were p type dopable and possessed multi-chromic property. Optical studies demonstrated that the polymer based on EDOT unit (P2) resulted in lower band gap since EDOT is higher electron donating group than thiophene. |
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| Keywords: | Benzimidazole donor-acceptor donor effect perfluorophenyl electrochromism |
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