Conducting copolymers of thiophene functionalized polystyrenes with thiophene

Sahin E., Camurlu P., Toppare L., Mercore V., Cianga I., Yagci Y.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol.579, no.2, pp.189-197, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 579 Issue: 2
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jelechem.2005.01.017
  • Journal Name: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.189-197
  • Keywords: electrochromic devices, conducting polymers, graft copolymerization, POLYMER ELECTROCHROMIC DEVICES, TRANSFER RADICAL POLYMERIZATION, LIGHT-EMITTING-DIODES, ELECTRODE MATERIAL, COUPLING PROCESSES, POLYPYRROLE
  • Middle East Technical University Affiliated: Yes

Abstract

Thiophene capped polystyrenes (TCP1, TCP2) were synthesized by atom transfer radical polymerization of styrene followed by Suzuki condensation with 2-thiophene boronic acid. Electrically conducting graft polymers of TCP1 and TCP2 with thiophene were achieved by electrochemical methods. Characterization of the graft polymers were performed by cyclic voltammetry (CV), Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy analyses. Electrochromic properties of the conducting copolymers were investigated by spectroelectrochemistry, kinetic and colorimetry studies. The observed lambda(max) and band gap values were found to be at 432 nm, 2.10 eV and 453 nm, 2.13 eV for P(TCP1 -co-Th) and P(TCP2-co-Th), respectively. Also, we successfully established the utilization of dual-type complementary colored polymer electrochromic devices using P(TCP I co-Th)/poly(3,4-ethylenedioxythiophene) (PEDOT) in sandwich configuration. The switching ability, stability and optical memory of the electrochromic device were investigated with UV-Vis spectrophotometer and CV. P(TCP1-co-Th)/PEDOT switches between blue and brown. (c) 2005 Elsevier B.V. All rights reserved.