Dynamic behavior and some of the molecular properties of water molecules in pure water and in magnesium chloride solutions
Dynamic behavior and some of the molecular properties of water molecules in pure water and in magnesium chloride solutions
复制标题
纯水和氯化镁溶液中水分子的动态行为和一些分子性质
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
J. Leyte
中科院分区：
文献类型：
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作者：
R. Struis;J. D. Bleijser;J. Leyte
通过对纯水中/sup 17/O对/sup 2/H、/sup 17/O和/sup 1/H的弛豫速率的研究，导出了相互作用常数的值，并证明了在皮秒时间尺度上，水在-10 ~ 53/sup 0/C之间具有各向同性取向。在MgCl/sub /溶液中，在阳离子水化壳中，水分子的取向是各向异性的，弛豫速率的有效相关时间和耦合常数发生了显著的变化。水化水的各向异性运动与最近的中子衍射结果一致。讨论了这些效应的浓度和温度依赖性。
From the study of the relaxation rates of /sup 2/H, /sup 17/O, and /sup 1/H due to /sup 17/O in pure water the values of the interaction constants were derived and it is demonstrated that on a picosecond time scale water reorients isotropically for temperatures between -10 and 53/sup 0/C. In MgCl/sub 2/ solutions it is shown that in the cationic hydration shell the water molecule reorients anisotropically and that the effective correlation times and coupling constants of the relaxation rates are significantly changed. The anisotropic motion of the hydration water is interpreted in concordance with recent neutron diffraction results. The concentration and temperature dependence of these effects are discussed.