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    • Electrochemical copolymerization of 𝑁-methylpyrrole and 2,2'-bithitiophene; characterization, micro-capacitor study, and equivalent circuit model evaluation

      Murat Ates Fatih Arican Tolga Karazehir

      Volume 36 Issue 7 December 2013 pp 1281-1290

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/036/07/1281-1290

    • Keywords

       

      𝑁-methylpyrrole; 2,2'-bithitiophene; copolymers; electrochemical impedance spectroscopy; conducting polymers; circuit model.

    • Abstract

       

      𝑁-methylpyrrole (𝑁-MPy) and 2,2'-bithiophene (BTh) were electrocopolymerized in 0.2 Macetonitrile–sodium perchlorate solvent–electrolyte couple on a glassy carbon electrode (GCE) by cyclic voltammetry (CV). The resulting homopolymers and copolymers in different initial feed ratios of [𝑁-MPy]0/[BTh]0 = 1/1, 1/2, 1/5 and 1/10 were characterized by CV, Fourier-transform infrared reflectance attenuated transmittance (FTIR–ATR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and electrochemical impedance spectroscopy (EIS). The capacitive behaviours of the modified electrodes were defined via Nyquist, Bode-magnitude, Bode-phase and admittance plots. The equivalent circuitmodel of R(C(R)(QR)(CR)) was performed to fit theoretical and experimental data. The highest low-frequency capacitance (𝐶LF) were obtained as 𝐶LF = ∼ 1.23 × 10-4 mF cm-2 for P(N-MPy), 𝐶LF = ∼ 2.09 × 10-4 mF cm-2 for P(BTh) and 𝐶LF = ∼ 5.54 × 10-4 mF cm-2 for copolymer in the inital feed ratio of [𝑁-MPy]0/[BTh]0 = 1/2.

    • Author Affiliations

       

      Murat Ates1 Fatih Arican1 Tolga Karazehir1 2

      1. Department of Chemistry, Faculty of Arts and Sciences, Namik Kemal University, Degirmenalti Campus, Tekirdag 59030, Turkey
      2. Department of Chemistry, Faculty of Arts and Sciences, Istanbul Technical University, Maslak, Istanbul, Turkey

    • Dates

       
      Published
      December 2013
      Manuscript received
      29 July 2012
      Manuscript revised
      4 November 2012

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