Electroanalysis of thiocyanate using a novel glassy carbon electrode modified by aryl radicals and cobalt tetracarboxyphthalocyanine |
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Authors: | Fungisai Matemadombo Tebello Nyokong |
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Affiliation: | a Rhodes University, Department of Chemistry, PO Box 94, 6140 Grahamstown, South Africa b Ghent University, Department of Textiles, Technologiepark 907, B-9052 Ghent, Belgium |
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Abstract: | Electrochemical grafting of 4-nitrobenzenediazonium tetrafluoroborate onto a glassy carbon electrode (GCE) results in the formation of a nitrophenyl radical, which reacts with the surface to form a covalent bond (grafting) and results in a nitrophenyl modified electrode. The nitro group is electrochemically reduced to a NH2 group. Cobalt tetracarboxyphthalocyanine (CoTCPc) complex is then attached to the NH2 group using 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and N-hydroxysuccinimide (NHS) as coupling agents. The new CoTCPc modified electrode was characterized using cyclic voltammetry and then employed for the catalytic oxidation of thiocyanate. |
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Keywords: | Cobalt tetracarboxyphthalocyanine Thiocyanate Aryl radical Cyclic voltammetry 1-Ethyl-3-(3-dimethylaminopropyl)-carbodiimide N-Hydroxysuccinimide |
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