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 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 729
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jelechem.2014.07.005
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.15-20
  • Keywords: Multichromism, Electrochemical polymerization, Electrochromic device, Thienylenepyrrole polymers, SOLUBLE CONDUCTING POLYMER, FLUORESCENT POLYMER, TUNGSTEN, PYRROLE
  • Middle East Technical University Affiliated: Yes


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 NaClO4 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. (C) 2014 Published by Elsevier B.V.