Lanthanide complexes of iminocarboxylate ligands derived from 1,4,7-triazacyclononane: structural characterisation and relaxivity of the GdIII and luminescence of the EuIII complexesElectronic supplementary information (ESI) available: 1H NMR spectra of [Y(L1)(CH3CO2)] (6) in D2O at 298 K and 1H NMR data on acid-catalysed hydrolysis of [La(L)] (5) in D2O (pD = 4.4). See http://www.rsc.org/suppdata/dt/b2/b209090m/
作者:Lorenzo Tei、Alexander J. Blake、Michael W. George、Julia A. Weinstein、Claire Wilson、Martin Schröder
DOI:10.1039/b209090m
日期:2003.4.17
A new asymmetric derivative of 1,4,7-triazacyclononane with two iminocarboxylic pendant arms attached to the macrocyclic ring has been designed and prepared. Lanthanide complexes of L1 and of its previously reported symmetric analogue L, containing three pendant arms, are described. The complexes [Ln(L)] (Ln = Gd, Eu, Dy) and [Ln(L1)X] (Ln = Y, Gd, Eu, Dy) (X = Cl− or CH3COO−) have been synthesised
的一个新的不对称导数 1,4,7-三氮杂环壬烷设计并制备了带有连接在大环上的两个亚氨基羧酸侧基的悬臂。描述了L 1及其先前报道的对称类似物L的镧系元素络合物,其中包含三个侧链。的配合物[LN(L)](Ln为钆,铕,镝)和[LN(L 1)X](Ln为Y,钆,铕,镝)(X =氯-或CH 3 COO - )已通过席夫碱缩合合成1,4,7-三(2-氨基乙基)-1,4,7-三氮杂环壬烷(1)或1,4-双(2-氨基乙基)-1,4,7-三氮杂环壬烷(2)分别与丙酮酸钠在镧系元素离子模板上 配合物[Gd(L)]和[Gd(L 1)(CH 3 CO 2)]的结构特征为X射线晶体学。 1 H NMRD 2 O中反磁性[La(L)]和[Y(L 1)]的光谱研究表明,这些配合物对pH值显示出不同的pH依赖性。水解L和L 1中的C N键的数目。水解[Y(L 1)]在中性pH下会在数小时内发生,而酸性介质需要达到相同的速率水解的[La(L)]。