PHYSICOCHEMICAL STUDIES ON THE CHELATION BEHAVIOR OF BIOLOGICALLY-ACTIVE 2-HYDROXY-1-NAPHTHALDEHYDE SEMICARBAZONE (HNAS) WITH SOME LANTHANONS

被引：0

作者：

SAHADEV ^{[1
]}

SHARMA, RK ^{[1
]}

SINDHWANI, SK ^{[1
]}

机构：

[1] UNIV DELHI,DEPT CHEM,DELHI 110007,INDIA

来源：

MONATSHEFTE FUR CHEMIE | 1992年 / 123卷 / 1-2期

关键词：

POTENTIOMETRY; FORMATION CONSTANT; 2-HYDROXY-1-NAPHTHALDEHYDE SEMICARBAZONE (HNAS); LANTHANONS;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The chelation behaviour of the complexes of La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Y3+, Tb3+, Dy3+, Ho3+ with biologically active 2-Hydroxy-1-naphthaldehyde semicarbazone (HNAS) has been studied potentiometrically in 75% (upsilon/upsilon) dioxane-water medium at various ionic strengths. The method of Bjerrum and Calvin, as modified by Irving and Rossotti has been used to find out the values of nBAR and pL. The formation constants of metal chelates and the values of S(min) have been calculated. The order of formation constants of chelates was found to be: La3+ < Ce3+ < Pr3+ < Nd3+ < Sm3+ < Eu3+ < Gd3+ < Y3+ < Tb3+ < Dy3+ < Ho3+.

引用

页码：25 / 33

页数：9

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