A novel conducting polymer based on terthienyl system bearing strong electron-withdrawing substituents and its electrochromic device application

ASİL ALPTEKİN D., CİHANER A., Algi F., ÖNAL A. M.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.618, ss.87-93, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 618
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jelechem.2008.02.027
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.87-93
  • Anahtar Kelimeler: electrochemical polymerization, electrochromic device, conducting polymers, polythiophene, electron-withdrawing substituents, FIELD-EFFECT TRANSISTOR, PI-CONJUGATED SYSTEMS, BANDGAP POLYMERS, DIOXYTHIOPHENE POLYMERS, REACTIVE GROUPS, POLYTHIOPHENE, CELLS, POLY(3-METHYLTHIOPHENE), 3-METHYLTHIOPHENE, OLIGOMERS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A novel conducting polymer bearing strong electron-withdrawing substituents (EWS) directly attached to the 3,4-positions of the thiophene ring was synthesized by electrochemical polymerization of diethyl 2,5-di(thiophen-2-yl)thiophene-3,4-dicarboxylate (SSS-Diester). The polymer (PSSS-Diester) was characterized by cyclic voltammetry, FT-IR and UV-vis spectroscopy. The polymer has a reversible redox process and demonstrates a stable electrochromic behavior: reddish orange in the neutral state, brown in the intermediate state and green in the oxidized state. Optical density and response time of the dual-type electrochromic device based on PSSS-Diester were found to be 0.23 and 0.6 s at 623 nm, respectively. It is also noteworthy that the device shows good environmental and redox stability (i.e. 94% of the optical activity of the device retained after 500th switch). (c) 2008 Elsevier B.V. All rights reserved.