Absolute ion hydration free energy scale and the surface potential of water via quantum simulation
Absolute ion hydration free energy scale and the surface potential of water via quantum simulation
复制标题
通过量子模拟的绝对离子水合自由能尺度和水的表面电势
DOI:
10.1073/pnas.2017214117
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Beck, Thomas L.
中科院分区:
文献类型:
--
作者:
Shi, Yu;Beck, Thomas L.
With a goal of determining an absolute free energy scale for ion hydration, quasi-chemical theory and ab initio quantum mechanical simulations are employed to obtain an accurate value for the bulk hydration free energy of the Na+ion. The free energy is partitioned into three parts: 1) the inner-shell or chemical contribution that includes direct interactions of the ion with nearby waters, 2) the packing free energy that is the work to produce a cavity of sizein water, and 3) the long-range contribution that involves all interactions outside the inner shell. The interfacial potential contribution to the free energy resides in the long-range term. By averaging cation and anion data for that contribution, cumulant terms of all odd orders in the electrostatic potential are removed. The computed total is then the bulk hydration free energy. Comparison with the experimentally derived real hydration free energy produces an effective surface potential of water in the range −0.4 to −0.5 V. The result is consistent with a variety of experiments concerning acid–base chemistry, ion distributions near hydrophobic interfaces, and electric fields near the surface of water droplets.
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影响因子:
4.4
作者:
L. Horváth;T. Beu;M. Manghi;J. Palmeri
通讯作者:
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影响因子:
64.8
作者:
Y. Bhattacharjee
通讯作者:
Y. Bhattacharjee
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
影响因子:
1.6
作者:
Richard C. Remsing;J. Weeks
通讯作者:
J. Weeks
影响因子:
1.1
作者:
V. Craig;C. L. Henry
通讯作者:
C. L. Henry