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Molecular dynamics simulations of sodium chloride solutions in water-dimethyl sulphoxide mixtures: Potentials of mean force and solvation structures

机译:水-二甲亚砜混合物中氯化钠溶液的分子动力学模拟:平均力和溶剂化结构的潜力

摘要

Five solutions of sodium chloride in mixtures of water and dimethyl sulphoxide (DMSO) have been simulated using the conventional molecular dynamics technique. The potentials of mean force (PMFs) of the sodium chloride ion pair in the presence of the five water-DMSO mixtures with DMSO mole fractions (x(DMSO)) of 0.10, 0.21, 0.35, 0.48 and 0.91 have been computed. The derived PMFs have been confirmed by the long time dynamical ion-pair trajectories. The solvation structures of the ions in the presence of these mixtures have been analyzed using the ion-solvent radial distribution functions and the corresponding integration numbers. It has been found that the Na+ ion is always preferentially solvated by the water molecules in all the water-DMSO solvent mixtures. The Cl- ion is slightly preferred by the DMSO molecules in these mixed solvents. (C) 1999
机译:使用常规的分子动力学技术已经模拟了氯化钠在水和二甲基亚砜(DMSO)混合物中的五种溶液。计算了五种水-DMSO混合物(DMSO摩尔分数(x(DMSO))分别为0.10、0.21、0.35、0.48和0.91)下氯化钠离子对的平均力(PMFs)。长时间的动态离子对轨迹已证实了衍生的PMF。使用离子溶剂的径向分布函数和相应的积分数分析了在这些混合物存在下离子的溶剂化结构。已经发现,在所有水-DMSO溶剂混合物中,Na +离子总是优先被水分子溶剂化。在这些混合溶剂中,DMSO分子更优选Cl-离子。 (C)1999

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    DAS AK; TEMBE BL;

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  • 年度 1999
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  • 原文格式 PDF
  • 正文语种 eng
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