Electrochemical co-polymerization of a novel fluorene derivative with 3,4-ethylenedioxythiophene

Bezgin B., Yagan A., ÖNAL A. M.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol.632, pp.143-148, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 632
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jelechem.2009.04.011
  • Journal Name: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.143-148
  • Keywords: Electropolymerization, Band gap, Electrochemical impedance spectroscopy, Spectroelectrochemistry, Fluorene, VERSATILE ELECTROACTIVE POLYMERS, ANODIC-OXIDATION, POLYFLUORENE DERIVATIVES, CONJUGATED COPOLYMERS, EFFICIENT, FILMS, ELECTROPOLYMERIZATION, ELECTROSYNTHESES, FAMILY, UNITS
  • Middle East Technical University Affiliated: Yes

Abstract

The co-polymerization of a novel fluorene derivative, N-(9H-fluoren-9-ylidene)benzamine (FBA), with 3,4-ethylenedioxythiophene (EDOT) was successfully achieved in acetonitrile via direct anodic oxidation of the monomer mixtures both on platinum and indium-tin oxide working electrodes. The characterization of copolymer films, poly(EDOT-co-FBA), was carried out utilizing electrochemical, spectroelectrochemical, electrochemical impedance (EIS), and FT-IR techniques. It is found that poly(EDOT-co-FBA) films which were synthesized with a feed ratio of FBA/EDOT 5/2 via both potentiodynamically and potentiostatically, had different properties than that of electrochemically prepared poly(3,4-ethylenedioxythiophene) (PEDOT) film. Spectroelectrochemical investigations revealed that copolymer films exhibit relatively lower band gap (1.63 eV) than that of polyfluorenes. Electrochemical impedance spectroscopy (EIS) was also employed to investigate both the resistance and capacitance properties of copolymer coatings. (C) 2009 Elsevier B.V. All rights reserved.