Electrochemical and optical properties of novel donor‐acceptor thiophene‐perylene‐thiophene polymers |
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| Authors: | Sermet Koyuncu Mahmut Kus Serafettin Demic ?smet Kaya Eyup Ozdemir Siddik Icli |
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| Institution: | 1. Solar Energy Institute, Ege University, 35100, Bornova, ?zmir, Turkey;2. Department of Chemistry, Faculty of Sciences and Arts, ?anakkale Onsekiz Mart University, 17020, ?anakkale, Turkey;3. Department of Chemistry, Faculty of Sciences and Arts, Mugla University, 48000, Mugla, Turkey |
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| Abstract: | In this study, donor‐acceptor type thiophene‐perylene‐thiophene monomers were synthesized and polymerized by both oxidative polymerization using FeCl3 as catalyst and the electrochemical process. UV–vis, FTIR, 1H NMR, and elemental analysis techniques were used for structural characterization. Thermal behaviors of these compounds were determined by using TGA system. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels and electrochemical and optical band gap values were calculated by using the results of cyclic voltammetry and UV–vis measurements, respectively. The number–average molecular weight (Mn), weight–average molecular weight (Mw), and polydispersity index (PDI) values of synthesized polymers were determined by size exclusion chromatography. Conductivity measurements of these polymers were carried out by electrometer by using a four‐point probe technique. The conductivity was observed to be increased by iodine doping. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1974–1989, 2008 |
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| Keywords: | band gap conducting polymers donor‐acceptor polymers dyes/pigments electrochemistry gel permeation chromatography heteroatom‐containing polymers spectroelectrochemistry thermogravimetric analysis (TGA) thiophene‐perylene |
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