Synthesis of methyl 4-(9H-carbazole-9-carbanothioylthio) benzoate: electropolymerization and impedimetric study

Methyl 4-((9H-(carbazole-9-carbanothioylthio) benzoate (MCzCTB) was chemically synthesized and charac- terized by FTIR, 1 H NMR, and 13 C NMR. A novel synthesized monomer was electropolymerized on a glassy carbon electrode (GCE) in various initial molar concentrations of (MCzCTB)0= 1, 3, 5, and 10 mM in 0.1 M NaClO4/CH3CN and 1 M H2SO4. P(MCzCTB)/GCE was characterized by cyclic voltammetry, Fourier transform infrared-attenuated transmittance reectance, scanning electron microscopy-energy dispersive X-ray, and electrochemical impedance spec- troscopy. The capacitive behavior of the modied electrode was obtained by Nyquist, Bode-magnitude, and Bode-phase plots. The highest capacitance at low frequency was obtained as 53.1 mF cm 2 from Nyquist plot and 19.454 Fg 1 at a scan rate of 10 mV s 1 for (MCzCTB)0 = 1.0 mM. CS2 and OCH3 groups are electron-withdrawing and electron- donating groups in the monomer structure. These groups aect the polymerization and capacitive behavior of the polymer. The polymer may be used for supercapacitor and biosensor applications in the future.