Hide/Show Apps

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

Carbas, Buket Bezgin
TEKE, Ecem
Zora, Metin
Önal, Ahmet Muhtar
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.