Electrosynthesis of a new indole based donor-acceptor-donor type polymer and investigation of its electrochromic properties

Carbas B. B., Kivrak A., Kavak E.

MATERIALS CHEMISTRY AND PHYSICS, vol.188, pp.68-74, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 188
  • Publication Date: 2017
  • Doi Number: 10.1016/j.matchemphys.2016.12.040
  • Journal Name: MATERIALS CHEMISTRY AND PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.68-74
  • Keywords: Poly-indole, Electrochromism, Polythiophene, Conjugated polymer, FIELD-EFFECT TRANSISTORS, SCHOTTKY-BARRIER, ELECTROCHEMICAL POLYMERIZATION, SOLAR-CELLS, DEVICES, POLYINDOLE, FILMS, ION, POLYACETYLENE, EFFICIENCY
  • Eskisehir Osmangazi University Affiliated: No

Abstract

The purpose of this research is to synthesize a novel monomer, namely, 1-mety1-2,3-di(thiophen-2-y1)-1H-indole (DTI) and to present optical and electrochemical characterization of its corresponding polymer film, P(DTI). The donor thiophene unit was matched with acceptor indole unit in consideration of donor acceptor-donor approach in order to achieve DTI monomer. This monomer was electropolymerized in the medium 0.1 M LiClO4/Ethanol:ACN solution mixture and a conductive indole based polymer, P(DTI) was obtained. The spectroelectrochemical studies show that P(DTI) has a band gap of 2.45 eV and a color change from pale green to dark green with a switching time of 0.9 s during oxidation and a high coloration efficiency (286 cm(2)/C) at 830 nm. Furthermore, P(DTI) shows good environmental and redox stability with a retention of 85% after 1500th switching. (C) 2016 Elsevier B.V. All rights reserved.