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Electrochemical synthesis of polymers with alternate phenothiazine and bithiophene units |
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| Authors: | Mieczys?aw ?apkowski Sylwia Plewa Jacek Doskocz Joanna Cabaj Wies?aw W Su?kowski |
| Affiliation: | a Silesian University of Technology, Faculty of Chemistry, Strzody 9, 44-100 Gliwice, Poland b PAS, Centre of Polymer and Carbon Materials, ul. M. Curie-Skolodowska 34, 41-819 Zabrze, Poland c Wroc?aw University of Technology, Department of Chemistry, Faculty of Medicinal Chemistry and Microbiology, Wybrze?e Wyspiańskiego 27, 50-370 Wroc?aw, Poland d Department of Environmental Chemistry and Technology, Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland |
| Abstract: | An electrochemical and spectroelectrochemical study of a new monomer—N-alkyl-bis(thiophene)phenotiazine have been presented. Electrochemical polymerization of the monomer leads to a polymer with alternate phenothiazine and bithiophene units. Polymerization proceeds after bielectronic oxidation of the molecule. Monoelectronic oxidation gives a stable radical cation with spin located on phenothiazine. Electrochemical properties of the polymer depend on the thickness of the film deposited on the electrode. For thin layers one can observe a characteristic redox couple of phenothiazine oxidation to a radical cation. Analysis of the polymer behaviour and the results of spectroelectrochemical measurements indicate a mixed-type of polymer conductivity. |
| Keywords: | Phenothiazine derivatives Cyclic voltammetry Radical cation ESR Oxidation mechanism |
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