Synthesis and electrochemical properties of a new benzimidazole derivative as the acceptor unit in donor-acceptor-donor type polymers

OZELCAGLAYAN A. C., SENDUR M., AKBASOGLU N., APAYDIN D. H., ÇIRPAN A., TOPPARE L.

ELECTROCHIMICA ACTA, vol.67, pp.224-229, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 67
  • Publication Date: 2012
  • Doi Number: 10.1016/j.electacta.2012.02.047
  • Journal Name: ELECTROCHIMICA ACTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.224-229
  • Keywords: Benzimidazole, Electrochromism, Multichromic, Conjugated polymers, Donor effect, CONJUGATED POLYMERS, ELECTROCHROMIC POLYMERS, NEUTRAL STATE, BAND-GAP, GREEN, ELECTRON
  • Middle East Technical University Affiliated: Yes

Abstract

A new benzimidazole unit, 4'-(tert-butyl)spiro[benzo[d]imidazole-2,1'-cyclohexane] was synthesized and coupled with different donor units like 3-hexylthiophene and 3,4-ethylenedioxythiophene (EDOT) via Stille coupling. The donor-acceptor-donor (D-A-D) type monomers, 4'-(tert-butyl)-4,7-bis(4-hexylthiophen-2-yl)spiro[benzo[d]imidazole-2,1'-cyclohexane] (BIHT) and 4'-(tert-butyl)-4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)spiro[benzo[d]imidazole-2,1'-cyclohexane] (BIED) were electrochemically polymerized, their electrochemical and optical properties were investigated by cyclic voltammetry, UV-vis-NIR spectroscopy techniques. Effect of donor groups on the optical and electronic properties of polymer was studied. (C) 2012 Elsevier Ltd. All rights reserved.