Effect of Dithienopyrrole Unit on Electrochromic and Optical Properties of Benzotriazole-Based Conjugated Polymers

UNLU N. A., DENIZ T. K., SENDUR M., ÇIRPAN A.

MACROMOLECULAR CHEMISTRY AND PHYSICS, vol.213, no.18, pp.1885-1891, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 213 Issue: 18
  • Publication Date: 2012
  • Doi Number: 10.1002/macp.201200274
  • Journal Name: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1885-1891
  • Keywords: benzotriazole, conjugated polymers, dithienopyrrole, electrochromism, SOLUTION PROCESSABLE BENZOTRIAZOLE, FIELD-EFFECT TRANSISTORS, SOLAR-CELLS, LOW BANDGAP, N-ALKYL, COPOLYMERS, DONOR, FLUORENE, ELECTRON, DERIVATIVES
  • Middle East Technical University Affiliated: Yes

Abstract

A series of benzotriazole (BTz)- and dithienopyrrole (DTP)-based three polymers; poly[2-(2-dodecyl-2H-benzo[d][1,2,3]triazol-4-yl)-4-hexyl-4H-dithieno[3,2-b:2',3'-d]pyrrole] (P1), poly[2- (5-(2-dodecyl-7-(thiophen-2-yl)-2H-benzo[d][1,2,3]triazol-4-yl)thiophen-2-yl)-4-hexyl-4H-dithieno[3,2-b:2',3'-d]pyrrole] (P2), and poly[2-(5-(2-dodecyl-7-(4-hexylthiophen-2-yl)-2H-benzo[d][1,2,3]triazol-4-yl)-3-hexylthiophen-2-yl)-4-hexyl-4H-dithieno[3,2-b:2',3'-d]pyrrole] (P3) was synthesized via Stille coupling. To investigate the effect of the p-bridges on the electrochromic properties of BTz-based polymers, thiophene and 3- hexylthiophene was incorporated between BTz and DTP moiety. Different p-bridges affected the HOMO and LUMO energy levels, coloration efficiency, switching time, and optical contrast.