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 H-1 NMR, C-13 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 pi-conjugated oligomers for the development of various electrical and electrochemical devices. (C) 2014 Elsevier Ltd. All rights reserved.