Paramagnetic Properties and Complexation Kinetics of Edta With Praseodymium and Holmium(III) Cations in Aqueous Solution

被引：10

作者：

Babailov, S. P. ^{[1
]}

Kokovkin, V. V. ^{[1
]}

Stabnikov, P. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Div, AV Nikolaev Inst Inorgan Chem, Novosibirsk, Russia

来源：

JOURNAL OF STRUCTURAL CHEMISTRY | 2010年 / 51卷 / 04期

关键词：

lanthanide-induced shifts in NMR spectra; dynamic NMR; EDTA; aqueous solutions; kinetics; chemical exchange; molecular dynamics; NMR thermosensors; medical magnetic resonance tomography; DYNAMICS;

D O I：

10.1007/s10947-010-0095-y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The NMR method is used to study the features of the complexation kinetics of paramagnetic lanthanide cations with EDTA in aqueous media at temperature and pD variation. The acidity of solutions is determined by the potentiometric method with a glass electrode. By the dynamic NMR method it is found that the activation enthalpy of the association between EDTA complexones and Ln cations is Delta H = 71 +/- 5 kJ/mol in a temperature range from 290 K to 368 K (at pD = 1.6). The obtained results indicate that Ho and Pr complexes with EDTA are promising compounds as in vivo NMR thermosensors for biology and medicine.

引用

页码：652 / 656

页数：5

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