THE STUDY OF THE INTERACTIONS OF COBALT(II) TETRASULFOPHTHALOCYANINE WITH CYSTEINE AND HISTIDINE

Authors
SEKOTA M NYOKONG T
Citation
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
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear",Crystallography
Journal title
Polyhedron → ACNP
ISSN journal
02775387
Volume
16
Issue
19
Year of publication
1997
Pages
3279 - 3284
Database
ISI
SICI code
0277-5387(1997)16:19<3279:TSOTIO>2.0.ZU;2-B
Abstract
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.