A Low Band Gap Polymer Based on Selenophene and Benzobis (thiadiazole)

Abdulrazzaq M., İçli Özkut M. , Gokce G., Ertan S., Tutuncu E., CİHANER A.

ELECTROCHIMICA ACTA, vol.249, pp.189-197, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 249
  • Publication Date: 2017
  • Doi Number: 10.1016/j.electacta.2017.08.007
  • Title of Journal : ELECTROCHIMICA ACTA
  • Page Numbers: pp.189-197


A new derivative of benzobis(thiadiazole) based donor-acceptor-donor type monomers, namely 4,7-di (selenophen-2-yl)benzo[1,2-c;4,5-c']bis[1,2,5]thiadiazole (SeBTSe), was synthesized and its polymerization was carried out successfully via electrochemical polymerization in an electrolyte solution of 0.1 M tetrabutylammonium hexafluorophosphate dissolved in dichloromethane. The monomer SeBTSe is a deep red chromophore and it has four redox states: one oxidation, one neutral and two reduction states. The electrochemical behaviour of the corresponding polymer called PSeBTSe was studied by cyclic and differential pulse voltammetry. There is a good agreement between electrochemical (0.62-0.66 eV) and optical (0.63 eV) bandgaps of the polymer. Like the monomer, the ambipolar polymer has four redox states and electrochromic properties: gray beige at neutral state, smoky azurite at oxidized state, beige at first reduced state and dark beige at second reduced state. (C) 2017 Elsevier Ltd. All rights reserved.