CHELATE FORMATION OF N-TRIS(2-AMINOETHYL)AMINE-N',N',N'',N''',N'''-HEXAACETIC ACID (H(6)TTAHA) AND N-(PYRID-2-YL-METHYL)ETHYLENEDIAMINE-N,N',N'-TRIACETIC ACID (H(3)PEDTA) WITH GADOLINIUM(III) - SYNTHESES, STABILITY-CONSTANTS, AND NMR-RELAXIVITIES

被引：13
|
作者：
RULOFF, R [1 ]
ARNOLD, K [1 ]
BEYER, L [1 ]
GRUNDER, W [1 ]
WAGNER, M [1 ]
HOYER, E [1 ]
机构：
[1] UNIV LEIPZIG,INST ANORGAN CHEM,D-04103 LEIPZIG,GERMANY
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1995年 / 621卷 / 05期
关键词：
CHELATES; GADOLINIUM(III); STABILITY CONSTANTS; H-1-NMR RELAXIVITY;
D O I：
10.1002/zaac.19956210518
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The chelate formation of N-tris(2-aminoethyl)amine-N',N',N'',N'',N''',N'''-hexaacetic acid (H(6)TTAHA) and N-(pyrid-2-yl-methyl)ethylenediamine-N,N',N'-triacetic acid (H(3)PEDTA) with gadolinium(III) has been studies potentiometrically in aqueous solution at 25 degrees C and mu = 0.1 (KCl). [Gd(TTAHA)](3-):1g beta(M/ML) = 19.0;{H[Gd(TTAHA)]}(2-):1gK(H/MHL) = 8.30; [Gd(PEDTA):1g beta(M/ML) = 15.56. Both 1:1 gadolinium(III) complexes were isolated as Na2H[Gd(C18H24N4O12)] . 3.5 H2O and [Gd(C14H16N3O6] . 3 H2O, respectively. Their H-1-NMR relaxivities [1 . mmol(-1) . s(-1)] ({H[Gd(TTAHA)]}(2-): 9.5; [Gd(PEDTA)]:8.8) offer promising applications for H-1-NMR imaging.
引用
收藏
页码：807 / 811
页数：5
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