Collect. Czech. Chem. Commun. 1987, 52, 1223-1230

Catalytic activity of cobalt(II) tetrasulphophthalocyanine for the oxidation of sulphite ions and other substrates by dioxygen

Dana M. Wagnerová

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6


The oxidation of sulphite ions by dioxygen in the presence of cobalt(II) tetrasulphophthalocyanine (CoTSP) is catalyzed by traces of metal ions in the system and not by the complex itself. The addition of EDTA completely suppresses the oxidation of sulphite ions even in the presence of CoTSP. When the oxidation of a substrate is actually catalyzed by CoTSP, EDTA has no effect on the reaction rate. The catalytic effect of CoTSP is observed if the substrate and the catalyst form a reactive binary adduct, CoTSP substrate, responsible for an absorption band near 450 nm.