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

Authors: MURAT ATEŞ, NESİMİ ULUDAĞ, FATİH ARICAN, TOLGA KARAZEHİR

Abstract: Methyl 4-((9H-(carbazole-9-carbanothioylthio) benzoate (MCzCTB) was chemically synthesized and characterized by FTIR, ^1H 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 NaClO_4/CH_3CN and 1 M H_2SO_4. P(MCzCTB)/GCE was characterized by cyclic voltammetry, Fourier transform infrared-attenuated transmittance reflectance, scanning electron microscopy-energy dispersive X-ray, and electrochemical impedance spectroscopy. The capacitive behavior of the modified electrode was obtained by Nyquist, Bode-magnitude, and Bode-phase plots. The highest capacitance at low frequency was obtained as \sim 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. CS_2 and OCH_3 groups are electron-withdrawing and electron-donating groups in the monomer structure. These groups affect the polymerization and capacitive behavior of the polymer. The polymer may be used for supercapacitor and biosensor applications in the future.

Keywords: Methyl 4-((9H-(carbazole-9-carbanothioylthio) benzoate, electrochemical impedance spectroscopy, capacitor, electropolymerization, synthesis, SEM images

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