Electrochemical Properties of Tetrasubstituted Cobalt Phthalocyanines with Fragments of Benzoic Acid

The method of cyclic voltammetry is used for the first time to study the electrochemical behavior of cobalt phthalocyanine derivatives with fragments of benzoic acid CoPc(4-O–C 6 H 4 COOH) 4 and CoPc(4- S–C 6 H 4 COOH) 4 in an aqueous alkaline solution. Comparative analysis is carried out of the ele...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2018-11, Vol.54 (11), p.873-878
Main Authors: Berezina, N. M., Bazanov, M. I., Maizlish, V. E.
Format: Article
Language:English
Subjects:
Benzoic acid
Chemistry
Chemistry and Materials Science
Cobalt
Derivatives
Electrochemical analysis
Electrochemistry
Electrowinning
Fragments
Metal phthalocyanines
Oxidation
Oxygen
Physical Chemistry
Substitution reactions
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Summary:The method of cyclic voltammetry is used for the first time to study the electrochemical behavior of cobalt phthalocyanine derivatives with fragments of benzoic acid CoPc(4-O–C 6 H 4 COOH) 4 and CoPc(4- S–C 6 H 4 COOH) 4 in an aqueous alkaline solution. Comparative analysis is carried out of the electrochemical behavior and change in the electrocatalytic activity of metal phthalocyanines in the reaction of molecular oxygen electroreduction depending on the functional substitution in the macrocycle molecule. In the case of the CoPc(4-O–C 6 H 4 COOH) 4 and CoPc(4-S–C 6 H 4 COOH) 4 compounds, central metal ion oxidation (Co 2+ → Co 3+ ) and reduction (Co 2+ → Co 1+ ) processes and also two successive one–electron stages of phthalocyanine ligand electroreduction are registered. It is shown that the studied cobalt phthalocyanine derivatives manifest electrocatalytic activity in the process of molecular oxygen electroreduction.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193518130074