Electrochemical copolymerization of N-methylpyrrole and 2,2′-bithitiophene; characterization, micro-capacitor study, and equivalent circuit model evaluation
| Autor: | Fatih Arican, Tolga Karazehir, Murat Ates |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
circuit model
Materials science Thin-Films Scanning electron microscope Analytical chemistry Pyrrole Polybithienyl Capacitance Conducting Copolymers Perchlorate chemistry.chemical_compound copolymers Copolymer General Materials Science conducting polymers Electrodes Kramers-Kronig Transforms Electropolymerization Polypyrrole Polythiophene Dielectric spectroscopy electrochemical impedance spectroscopy chemistry Mechanics of Materials Impedance Spectroscopy Electrode 2 2 '-bithitiophene Equivalent circuit Cyclic voltammetry N-methylpyrrole |
| Zdroj: | Bulletin of Materials Science. 36:1281-1290 |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/s12034-013-0609-2 |
| Popis: | N-methylpyrrole (N-MPy) and 2,2'-bithiophene (BTh) were electrocopolymerized in 0 center dot 2 M acetonitrile-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 circuit model of R(C(R)(QR)(CR)) was performed to fit theoretical and experimental data. The highest low-frequency capacitance (C (LF)) were obtained as C (LF) = similar to 1 center dot 23 x 10 (-4) mF cm (-2) for P(N-MPy), C (LF) = similar to 2 center dot 09 x 10 (-4) mF cm(-2) for P(BTh) and C (LF) = similar to 5 center dot 54 x 10 (-4) mF cm(-2) for copolymer in the inital feed ratio of [N-MPy](0)/[BTh] (0) = 1/2. Research Foundation of Namik Kemal University, TurkeyNamik Kemal University [NKUBAP.00.10.YL.12.02] Financial support for this work by the Research Foundation of Namik Kemal University, Turkey, (project number: NKUBAP.00.10.YL.12.02), is gratefully acknowledged. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|