Electrochemical and optical properties of an azo dye based conducting copolymer


CİHANER A., Algi F.

TURKISH JOURNAL OF CHEMISTRY, cilt.33, ss.759-767, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 33 Konu: 6
  • Basım Tarihi: 2009
  • Doi Numarası: 10.3906/kim-0902-21
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Sayfa Sayıları: ss.759-767

Özet

The electrochemical and optical properties of a novel conducting copolymer called poly(2,5'-dimethyl-[4-(2,5-di-thiophen-2-yl-pyrrol-1-yl)-phenyl]azobenzene-co-(3,4-ethylenedioxythiophene)) (poly(1-co-EDOT)) are reported. Electrochemically synthesized poly(1-co-EDOT) based on the azo dye has a well-defined and reversible redox couple (0.37 V vs. Ag/AgCl) with good cycle stability. The copolymer film exhibits high conductivity (13 S/cm) as well as electrochromic behavior (magenta when neutralized and transmissive sky blue when oxidized). Furthermore, electro-optically active copolymer film has a low band gap of 1.79 eV with a pi-pi* transition at 555 nm.