文章基本信息

标题：Speciation Studies of Ternary Systems Involving Toxic Metals, Dipeptide and Catecholic Ligands
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作者：Anjali Sinha ; Renu Nair (Ahuja
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：9
页码：16297
DOI：10.15680/IJIRSET.2016.0509103
出版社：S&S Publications
摘要：Ternary complexes of metal M [ Pb (II), Cd(II) and Hg (II)] with A (Glycylglycine) and B ( o-Vanillinand 4- Methyl catechol) are investigated potentiometrically. Ligands A and B bind to metal ion M simultaneously toform 1:1:1 MAB mixed ligand complex in various equilibria. Experiments are performed in aqueous medium at threedifferent temperatures (20ºC±1, 30ºC±1 and 40ºC±1) and at three ionic strengths (μ=0.05M, 0.10M and 0.15M) inorder to calculate thermodynamic stability constants and other thermodynamic parameters. SCOGS computer programis used to obtain the speciation of various species formed in a particular equilibrium. The relative stability of ternarycomplexes as compared to binary species are expressed in term of Δ log K.. Values of Δ log K suggest that theformation of ternary complexes is favorable. The order of stability of the complexes with respect to metal ion is foundto be Hg(II) < Cd(II) < Pb(II).
关键词：glycylglycine ; ternary complexes; speciation; SCOGS.