Electrochemical polymerization of a new low-voltage oxidized thienylenepyrrole derivative and its electrochromic device application


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Carbas B. B. , Kivrak A. , Teke E., ZORA M., ÖNAL A. M.

Journal of Electroanalytical Chemistry, vol.729, pp.15-20, 2014 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 729
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jelechem.2014.07.005
  • Title of Journal : Journal of Electroanalytical Chemistry
  • Page Numbers: pp.15-20

Abstract

Synthesis of a new monomer, 2,5-bis-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5- yl)-1-phenyl-1H-pyrrole (ENE), from pyrrole, iodobenzene and 3,4-ethylenedioxythiophene (EDOT), and its electropolymerization are reported. ENE was oxidized at a low oxidation potential (0.45 V vs. Ag/AgCl) and successfully electropolymerized in acetonitrile containing 0.1 M NaClO 4 and LiClO4 electrolyte mixture. The resulting polymer, P(ENE), revealed five distinctive colors upon doping, which indicated that the polymer is multichromic. P(ENE) has a coloration efficiency of 288 cm 2/C at 422 nm with a specific optical band gap of 2.0 eV. Furthermore, an electrochromic device (ECD) based on P(ENE) and poly(ethylene dioxythiophene) (PEDOT) was constructed and its switching was investigated by UV-vis spectroscopy. © 2014 Published by Elsevier B.V.