The study of the interactions of cobalt(II) tetrasulfophthalocyanine with cysteine and histidine

被引：28

作者：

Sekota, M ^{[1
]}

Nyokong, T ^{[1
]}

机构：

[1] RHODES UNIV,DEPT CHEM,ZA-6140 GRAHAMSTOWN,SOUTH AFRICA

来源：

POLYHEDRON | 1997年 / 16卷 / 19期

关键词：

cysteine; histidine; cobalt; tetrasulfophthalocyanine; cystine; amino acids; DIMETHYL-SULFOXIDE; PHTHALOCYANINE; EQUILIBRIUM; PORPHYRINS; KINETICS; CYANIDE;

D O I：

10.1016/S0277-5387(97)00096-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Kinetics for the interaction of cobalt(lI) tetrasulfophthalocyanine ([(CoTSPc)-T-II](4-), Pc(-2)= phthalocyanine dianion) with the amino acids, histidine and cysteine, in pH 7.2 phosphate buffer were studied. The 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-) species in the presence of cysteine gave a rate constant of 2.2 dm(3) mol(-) s(-1). (C) 1997 Elsevier Science Ltd.

引用

页码：3279 / 3284

页数：6

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