无机化学学报

2-十四烷基-DTPA及其钆(Ⅲ)螯合物的合成与表征(英)

Synthesis and Characterization of 2-Tetradecyl-DTPA and Its Gd(Ⅲ) Chelate

作者	单位
冯志明	湖南师范大学化学化工学院,长沙 410081
李峰	湖南师范大学化学化工学院,长沙 410081
朱小娟	湖南师范大学化学化工学院,长沙 410081
陈蓉	湖南师范大学化学化工学院,长沙 410081
李晓如	中南大学化学化工学院,长沙 410083

摘要:

关键词: 钆(Ⅲ)螯合物 DTPA衍生物稳定性

基金项目:

Abstract: Synthesis and characterization of the ligand, [2-tetradecyl-3,6,9-tris(carboxymethyl)-3,6,9-triazaundecan-1,11-dioic acid, H₅L] and its Gd(Ⅲ) chelate are described. Protonation constants for H₅L (lgK_i^H = 10.80, 8.40, 4.30, 2.80, 2.15) and the stability constant for GdL^2- (lgK_GdL^2-= 22.75) were determined by potentiometric titration and are similar with the related values of DTPA and Gd-DTPA respectively. The results obtained show that the basicity of the ligand and the stability constant of its Gd(Ⅲ) chelate are not obviously altered after introduction of a linear chain tetradecyl group at the terminal acetic acid residue of DTPA.

Keywords: Gd(Ⅲ) chelate DTPA derivative stability

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冯志明,李峰,朱小娟,陈蓉,李晓如.2-十四烷基-DTPA及其钆(Ⅲ)螯合物的合成与表征(英)[J].无机化学学报,2004,20(5):547-550.

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