M. Sekota et T. Nyokong, THE STUDY OF THE INTERACTIONS OF COBALT(II) TETRASULFOPHTHALOCYANINE WITH CYSTEINE AND HISTIDINE, Polyhedron, 16(19), 1997, pp. 3279-3284
Kinetics for the interaction of cobalt(lI) tetrasulfophthalocyanine ([
(CoTSPc)-T-II](4-), Pc(-2)= phthalocyanine dianion) with the amino aci
ds, histidine and cysteine, in pH 7.2 phosphate buffer were studied. T
he rates were found to be first order in both the [(CoTSPc)-T-II](4-)
and the amino acid. The formation of the [(CoTSPc)-T-III](3-) species
in the presence of histidine occurred with a rate constant of 0.16 dm(
3) mol(-) s(-1), whereas the formation of the [(CoTSPc)-T-I](5-) speci
es in the presence of cysteine gave a rate constant of 2.2 dm(3) mol(-
) s(-1). (C) 1997 Elsevier Science Ltd.