期刊
JOURNAL OF CHEMICAL PHYSICS
卷 113, 期 11, 页码 4668-4673出版社
AMER INST PHYSICS
DOI: 10.1063/1.1288688
关键词
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First-principles molecular dynamics simulations have been performed on the solvation of Na+ in water. Consistent with the available experimental data, we find that the first solvation shell of Na+ contains on average 5.2 water molecules. A significant number of water exchanges between the first and second solvation shells are observed. However, the simulations are not long enough to reliably measure the rate of water exchange. Contrary to several previous studies, we do not find any effect of Na+ on the orientation of water molecules outside of the first solvation shell. Furthermore, the complete set of structural properties determined by first-principles molecular dynamics is not predicted by any of the known classical simulations. (C) 2000 American Institute of Physics. [S0021-9606(00)50435-8].
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