Electrocatalytic Investigations of Cu(II) and Fe(III) Complexes of Salophen Derivative Schiff Bases on the Pencil Graphite Electrode

Abstract

This present study describes a pencil graphite electrode surface covered with Cu(II) and Fe(III) complexes based on Salophen derivative Schiff bases in acetonitrile solution containing LiClO4 as a supporting electrolyte. Cyclic voltammetry method was used for the surface modification procedure with 25 cycle at a sweep rate of 50 mV s−1. Some characterization methods were used to identify of the prepared modified surfaces including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Ultraviolet‐visible Spectroscopy (UV‐Vis), and Scanning Electron Microscopy/Energy Dispersive X‐ray Spectroscopy (SEM/SEM‐EDX). The catalytic activity of these modified surfaces on the electrochemical oxidation of catechol (CC) was investigated and they compared with each other. The results demonstrated that these modified electrodes showed perfect electrocatalytic activity on the catechol determination, however the modified electrode prepared with the Cu(II) complex has higher catalytic activity than this prepared with the Fe(III) complex thanks to its the lower detection limit.

Sensor Based on a Poly[2-(Dimethylamino)ethyl Methacrylate-Co-Styrene], Gold Nanoparticles, and Methylene Blue-Modified Glassy Carbon Electrode for Melamine Detection

“…However, immobilization of the MB molecules on the GCE/PN–AuNPs surface electrode led to an increase to 1630.6 Ω, most likely due to the poor conductivity of MB. Using Equation (1) [ 37 ], the coverage of the GCE/PN–AuNPs–MB was calculated (θ 1 = 90%). where R CT0 represents the charge transfer resistance of the bare GCE and R CT represents the charge transfer resistance of the GCE/PN–AuNPs–MB under the same condition.…”

Immobilization of CoII‐(N,N′‐bis(salicylidene)‐2‐aminobenzylamine) on Poly(pyrrole‐co‐o‐anisidine)/Chitosan Composite Films: Application to Electrocatalytic Oxidation of Catechol

“…With these voltammograms, the relationship between concentration increase and current change was determined as proportionally. Then, two linear working ranges were observed on the obtained concentration increase-current change graph (Figure 10b) [32]. The limit of detection value (LOD) and linear ranges were determined as 1.1 μM and 3.0 μM-6.0 μM for the first linear working range and 16 μM-80 μM for the second linear range (Table .1).…”

Heterobimetallic conducting polymers based on salophen complexes via electrosynthesis

“…8 Salen and salophen complexes, a distinguished class of SB complexes known for their potentially tetradentate N 2 O 2 coordination pocket, have often been the subject of electropolymerization studies, starting from Goldsby's work in 1989. [9][10][11][12] In later studies, electrochemical polymerization of such complexes was carried out to achieve the modification of electrode surfaces and to investigate their performance as electrocatalysts, 13,14 sensors, 15 supercapacitors 16 and even as cathode materials for batteries. 17 In particular, the interest in heterometallic catalysts -especially based on abundant metals -continues to grow 18 thanks to the combined activity of different metal centers and the improved catalytic performance, as well as the importance of intrinsically conducting polymers (ICPs).…”