proven (III)的配合物已被证明是特别有效的磁共振成像(MRI)造影剂。实现更敏感的基于小g的MRI造影剂的一种基本策略是增加水合数q,以提高松弛度。在这项工作中,合成了一系列带有3个配位水分子的二亚乙基三胺-N-氧化物五乙酸-双酰胺基Gd(III)配合物,其中的水合数通过发光测量来验证。所有复合物的弛豫度约为市售MRI造影剂的三倍,范围为12.5至18.8 mM -1 s -1(1.5 T; 25°C)。使用HYPERQUAD程序在25°C下由电位滴定数据计算出Gd(III)配合物的形成常数,该常数证明了其优于商用MRI造影剂Gd-DTPA-BMA(Omniscan®)的稳定性。配合物的动力学惰性也高于Omniscan®,可与另一种商用MRI造影剂Gd-DTPA(Magnevist®)相提并论。同时,暴露于复合物后,HeLa细胞的活力仍不受影响。使用体内研究进一步评估了这些复合物
Synthesis, Variable Temperature and Pressure 17O NMR Study of Bis(alkylamide) Derivatives of [(Gd-DTPA)(H2O)]2 − An Assessment of the Substitution Effect on Water Exchange Kinetics
作者:François Botteman、Gaëlle M. Nicolle、Luce Vander Elst、Sophie Laurent、André E. Merbach、Robert N. Muller
Reference LCIB-ARTICLE-2002-003View record in Web of Science Record created on 2006-02-15, modified on 2017-05-12
参考 LCIB-ARTICLE-2002-003在 Web of Science 记录中查看记录,创建于 2006-02-15,修改于 2017-05-12
Controlled assembly of luminescent racks based on heteroleptic dinuclear lanthanide complexes
作者:M. Margarita Castaño-Briones、Andrew P. Bassett、Linette L. Meason、Peter R. Ashton、Zoe Pikramenou
DOI:10.1039/b412999g
日期:——
Luminescent lanthanide racks are formed in solution through supramolecular assembly of lanthanide ions with a rigid bis-didentate sensitiser ligand and octadentate aminopolycarboxylate ligands.
Luminescence Screening Assays for the Identification of Sensitizers for Lanthanides Based on the Controlled Formation of Ternary Lanthanide Complexes with DTPA-Bisamide Ligands
作者:Linette L. Ruston、Graeme M. Robertson、Zoe Pikramenou
DOI:10.1002/asia.200900367
日期:2010.3.1
confirm the formation of the ternarycomplexes, and NMR spectroscopic studies demonstrated a conformational locking effect upon formation of the ternarycomplex. It is shown that europium complexes with bulkier amide arms provide complexes with stronger luminescence enhancement that is clearly attributable to the bulkiness of the amide arms. In a luminescencescreening experiment, different substitutions
Complexes of Ga<sup>3+</sup>and In<sup>3+</sup>with the N,N″-bis(butylamide) derivative of diethylenetriaminepentaacetic acid: stability constants and nuclear magnetic resonance studies in aqueous solution
作者:Carlos F. G. C. Geraldes、Rita Delgado、Ana M. Urbano、Judite Costa、François Jasanada、François Nepveu
DOI:10.1039/dt9950000327
日期:——
Potentiometric titrations showed that the sum of the first three protonation constants of diethylene-triaminepentaacetate N,N″-bis(butylamide)(L1) decreases by units when compared to the diethylenetriaminepentaacetate (dtpa), and that the complexes of Ga3+ and In3+ of L1 have stability constants 6.1–6.3 long units lower than those of dtpa. The decreased basicity of the bis (amide) derivative thus correlates