The crystallized solvent could influence the lanthanide water bonding?
The crystallized solvent could influence the lanthanide water bonding?
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DOI：
10.1016/j.ica.2006.03.023
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发表时间：
2006-07-01
影响因子：
2.8
通讯作者：
Aime, S.
中科院分区：
文献类型：
--
作者：
Bombieri, G.;Marchini, N.;Aime, S.
两个钆DOTAM配合物[Gd（DOTAM）H2O]（CF 3SO 3）（3）中心点3 H（2）O（1）和[Gd（DOTAM）H2O]（CF 3SO 3）（3）中心点0.5H（2）O中心点CH 3CN（2）具有M异构体结构，配位几何构型围绕Gd离子覆盖的正方反棱柱（SA）。它们对于（2）中的2.396（6）和2.474（7）埃的Gd-O-水键长不同，其中在晶胞中存在两个独立的分子。影响Gd-O-水键距离的因素，重要的MRI实验中的水交换速率，已相关的不同网络的氢键涉及Gd配位水分子。母体化合物[Pr（DOTAM）H2O]（CF 3SO 3）（3）中心点HO中心点CH 3CN（3）的X射线结构揭示了In异构体的意外扭曲正方反棱柱（TSA）配位几何特征。(c)2006 Elsevier B. V.保留所有权利。
Two gadonilium DOTAM complexes [Gd(DOTAM)H2O](CF3SO3)(3) center dot 3H(2)O (1) and [Gd(DOTAM)H2O](CF3SO3)(3) center dot 0.5H(2)O center dot CH3CN (2) have the structure of the M isomer, with coordination geometry around the Gd ion capped square antiprismatic (SA). They differ for the Gd-O-water bond lengths of 2.396(6) and 2.474(7) angstrom in (2) where two independent molecules are present in the crystal cell. The factors influencing the Gd-O-water bond distance, important for the water exchange rate in MRI experiments, have been correlated to the different network of hydrogen bonds involving the Gd coordinated water molecule. The X-ray structure of the parent compound [Pr(DOTAM)H2O](CF3SO3)(3) center dot HO center dot CH3CN (3) reveals an unexpected twisted square antiprismatic (TSA) coordination geometry characteristic of the In isomer. (c) 2006 Elsevier B.V. All rights reserved.