Synthesis of star-shaped pyrrole and thiophene functionalized monomers and optoelectrochemical properties of corresponding copolymers

Ak M., TOPPARE L. K.

MATERIALS CHEMISTRY AND PHYSICS, vol.114, pp.789-794, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 114
  • Publication Date: 2009
  • Doi Number: 10.1016/j.matchemphys.2008.10.041
  • Journal Name: MATERIALS CHEMISTRY AND PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.789-794
  • Keywords: Conducting polymers, Spectroelectrochemistry, Star-shaped polymers, s-Triazines, ELECTROCHEMICAL PROPERTIES, ELECTROCHROMIC PROPERTIES, MAIN-CHAIN, S-TRIAZINE, 1,3,5-TRIAZINE, POLYMERS, DEVICES, UNITS
  • Middle East Technical University Affiliated: Yes

Abstract

Star-shaped thiophene and pyrrole functionalized monomers namely 2,4,6-tris(4-(1H-pyrrol-1-yl)phenoxy)-1,3,5-triazine (TriaPy) and 2,4,6-tris(4-(1H-pyrrol-1-yl)phenoxy)-1,3,5-triazine (TriaTh) were synthesized from 2,4,6-trichloro-1,3,5-triazine, thiophen-3-ylmethanol and 4-(1H-pyrrol-1-yl)phenol. Electrochemical copolymerization of monomers with thiophene and pyrrole was achieved in tetrabutylammonium tetrafluoroborate/acetonitrile (TBAFB/AN). Resulting copolymers were characterized by Fourier transform infrared (FTIR) spectrometer, cyclic voltammetry (CV) and conductivity measurements. Spectroelectrochemical analysis reflected that copolymer films have low lambda(max) for pi-pi* electronic transitions accompanied with a rather high band gap compared to polythiophene and polypyrrole. Switching abilities of copolymer films were evaluated by a kinetic study via measuring the transmittance (%T) at the maximum contrast. (C) 2008 Elsevier B.V. All rights reserved.