OUTER COORDINATION SPHERE - CHARACTERIZATION BY NUCLEAR MAGNETIC-RELAXATION DISPERSION
OUTER COORDINATION SPHERE - CHARACTERIZATION BY NUCLEAR MAGNETIC-RELAXATION DISPERSION
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DOI：
10.1021/j100370a022
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发表时间：
1990-04-05
影响因子：
--
通讯作者：
BRYANT, RG
中科院分区：
文献类型：
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作者：
LESTER, CC;BRYANT, RG
核磁弛豫分散数据上获得的三（丙二酸）铬酸钾（III），钾三（丙二酸）铬酸（III），和钾hexacyanochromate（III）的水溶液中的金属配合物的外配位域的磁弛豫效应的表征。数据表明，水质子的核自旋弛豫不是由金属络合物的旋转运动控制，而是由水分子和金属络合物的相对平移运动控制，并且在某些情况下，由金属中心的电子弛豫控制。与以前的分析使用类似的方法，采用不太完整的解释模型，目前的数据表明，在紧邻的金属离子的区域中的水的平移流动性的扰动非常小相比，散装水的属性。
Nuclear magnetic relaxation dispersion data obtained on aqueous solutions of potassium tris (oxalato) chromate (III), potassium tris (malonato) chromate (III), and potassium hexacyanochromate (III) provide a characterization of magnetic relaxation effects in the outercoordination domains of the metal complexes. The data demonstrate that the water proton nuclear spin relaxation is not controlled by rotational motions of the metal complex but by the relative translational motions of the water molecules and the metal complex and, in some cases, by the electron relaxation in the metal center. Unlike previous analyses using similar approaches that employed less complete interpretive models, the present data demonstrate that the translational mobility of the water in the regions immediately adjacent to the metalion are perturbed very little compared with properties of bulk water.