Murat ATEŞ, Nesimi ULUDAĞ, Fatih ARICAN, Tolga KARAZEHİR

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 characterized by FTIR, 1H NMR, and 13C 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 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. CS2 and OCH3 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.

Anahtar Kelimeler:

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

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

Keywords:

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

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1H NMR spectra were recorded on a Bruker 400 spectrometer operating at 400 MHz. Spectra were registered in CDCl3using the solvent as an internal standard at 400 MHz for1H and
C NMR spectroscopies at room temperature.
The capacitances (CLF) were calculated by the following equation:32 −34 CLF= (I+− I−)/ϑ× m
The polymer mass was calculated by the following formula: Qdep× Mmon/Z× F
In this formula, F: Faraday formula; Z = 2;35,36Qdep: Deposition charge; Mmon: Monomer mass.
I+and I−are the maximum currents in the positive and negative voltage scans, respectively; ϑ is the scan rate; m is the mass of the composite materials.
Preparation of the CFMEs