Synthesis, characterization, and electrochromic properties of conducting copolymers of 2-[(3-thienylcarbonyl)oxy]ethyl 3-thiophene carboxylate with thiophene and pyrrole

BULUT U., Alkan S., Yilmaz F., Yagci Y., Toppare L.

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, cilt.A41, sa.8, ss.937-947, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: A41 Sayı: 8
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1081/ma-120039180
  • Dergi Adı: JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.937-947
  • Anahtar Kelimeler: electrochemical polymerization, conducting copolymers, electrochromic properties, thiophene, POLYMER, POLYPYRROLE, DEVICES, POLYTHIOPHENE, CONTRAST
  • Acıbadem Mehmet Ali Aydınlar Üniversitesi Adresli: Hayır

Özet

2-[(3-Thienylcarbonyl)oxy]ethyl 3-thiophene carboxylate (TOET) was synthesized via the reaction of 3-thionylcarboxylic acid with ethylene glycol, and electrochemically polymerized with thiophene (Th) and pyrrole (Py) by using tetrabutylannnonium tetrafluoroborate (TBAFB) as the supporting electrolyte in acetonitrile (ACN). Characterization of the resulting copolymers were performed via cyclic voltammetry, FTIR, and scanning electron microscopy (SEM). Electrical conductivities are measured by the four-probe technique. Spectroelectrochemical analysis shows that the copolymer of this monomer with Th has an electronic band gap (due to the pi-pi* transition) of 1.97 eV. The homopolymer possessed a yellow color in its reduced form, and a greenish blue color in its oxidized form, however, no switching ability. The copolymer exhibited multi-color changes from a pale red in the neutral state, an orange, and finally a bluish-gray upon oxidation, and a long-term switching stability up to 450 double switches.