Abstract
Cyclic voltammetry (CV) has been used to investigate the electrochemical behavior of three arylene vinylene oligomers containing triphenylamine and carbazole units at the ends. The synthesis of oligomers was performed using Wittig reaction conditions, between 4-formyltriphenylamine or 3-formyl-N-hexyl-carbazole and two diphosphonium salts. The cyclic voltammograms, recorded in anodic range of potentials, revealed that the oligomers undergo quasi-reversible or irreversible redox processes. Polymer films were deposited on Pt electrode by CV and CPE (Controlled Potential Electrolysis) methods. The polymer films obtained by electrochemical polymerization methods show no solubility in all organic solvents and present similar FT-IR data with those polymers synthesized by chemical oxidative polymerization. Characterizations of the oligomers were made by 1H-NMR spectroscopy, UV–Vis and fluorescence spectroscopy. Due to the lack of their solubility, the polymers obtained by electrochemical methods were characterized only by FT-IR spectroscopy.
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