Different complexation of Nd3+ and Sm3+ with L-malic acid

被引：3

作者：

Sukhno, IV ^{[1
]}

Buz'ko, VY ^{[1
]}

Panushkin, VT ^{[1
]}

Gavriluk, MB ^{[1
]}

机构：

[1] Kuban State Univ, Krasnodar 350040, Russia

来源：

RUSSIAN JOURNAL OF COORDINATION CHEMISTRY | 2004年 / 30卷 / 08期

关键词：

D O I：

10.1023/B:RUCO.0000037440.00961.5d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complexation of Nd3+ and Sm3+ ions with L-malic acid (H(3)Mal) in aqueous solutions (I = 0.1 mol/l KCl) was studied by pH-metric titration at the molar concentration ratios of H(3)Mal : lanthanide equal to I : 2, 1:1, 2:1 in the pH range 2.8-9.5. Mathematical modeling of composite equilibrium processes was used to determine the compositions and stability constants of Nd(III) and Sm(III) L-malate complexes. It was found that in addition to the 1:1 and 1:2 complexes with different degree of deprotonation, the protonated L-malate complexes and hydroxo complexes of these metals were also formed. The Sm3+ and Nd3+ ions were established to behave differently during complexation with H(3)Mal.

引用

页码：591 / 598

页数：8

共 31 条

[1]

ALI SA, 1980, ZH NEORG KHIM, V25, P2977

[2] Characterization of the ionization and spectral properties of mercapto-carboxylic acids - Correlation with substituents and structural features [J].