The Synthesis and Characterization of -3,4-Ethylenedioxythiophene Derivatives with Electroactive Features

We report the synthesis of conjugated oligomers based on electron withdrawing 3,4-ethylenedioxythiophene (EDOT) in the case of which band gaps are tuned by the insertion of alkylated diphenylamine or phenoxazine/phenothiazine units. The structures and properties of synthesized compounds were characterized by 1H NMR, 13C NMR, UV-Vis absorption, and fluorescence spectroscopy as well as electrochemical measurements. The luminescence spectra demonstrate that copolymers are good chromophores. Also the electrical properties confirm the applicability of these novel aryl-based π-conjugated oligomers for the development of various electrical and electrochemical devices.