Spray-processable thiazolothiazole-based copolymers with altered donor groups and their electrochromic properties

Akpinar H. Z., UDUM Y., TOPPARE L. K.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.51, no.18, pp.3901-3906, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 18
  • Publication Date: 2013
  • Doi Number: 10.1002/pola.26791
  • Journal Name: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3901-3906
  • Keywords: benzotriazole, conducting polymers, conjugated polymers, electrochemistry, electrochromism, multichromism, thiazolothiazole, thin films, FIELD-EFFECT TRANSISTORS, POLYMER SOLAR-CELLS, WITHDRAWING THIAZOLE DERIVATIVES, CO-OLIGOMERS, PHYSICAL-PROPERTIES, ORGANIC ELECTRONICS, PERFORMANCE, POLYTHIOPHENES, MOBILITIES, MOLECULES
  • Gazi University Affiliated: Yes

Abstract

Two novel thiazolo[5,4-d] thiazole containing donor-acceptor type alternating copolymers, poly[2-(5-(2-decyl-2H-benzo[d][1,2,3] triazol-4-yl) thiophen-2-yl)-5-(thiophen-2-yl) thiazolo [5,4-d] thiazole] (BTzTh) and poly[2-(5-(2-decyl-2H-benzo[d][1,2,3]-triazol-4-yl) furan-2-yl)-5-(furan-2-yl) thiazolo[5,4-d] thiazole] (BTzFr) were synthesized by Stille coupling polymerization and their electrochemical and electrochromic properties were explored. Electrochemical activities of the spray-casted polymer films were determined by cyclic voltammetry. To evaluate the effect of thiophene and furan moieties on the optical properties of the copolymers, spectroelectrochemistry studies were performed. To examine the switching abilities, copolymer films were subjected to a double potential step chronoamperometry in their local maximum absorptions. Both thiazolothiazolecontaining copolymers showed multichromic properties with low band-gap values 1.7 and 1.9 eV for BTzTh and BTzFr, respectively. The decent electrochromical properties together with solution processability make them important candidates for electrochromic applications. (C) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 3901-3906