A Kirkwood-Buff Derived Force Field for Aqueous Alkali Halides.

A Kirkwood-Buff Derived Force Field for Aqueous Alkali Halides.
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DOI:
10.1021/ct100517z
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发表时间:
2011-04-26
影响因子:
5.5
通讯作者:
Smith, Paul E.
Smith, Paul E.
中科院分区:
化学1区
文献类型:
--
作者:
Gee, Moon Bae;Cox, Nicholas R.;Jiao, Yuanfang;Bentenitis, Nikolaos;Weerasinghe, Samantha;Smith, Paul E.

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提出了一个经典的不可极化力场,用于模拟碱金属卤化物水溶液(MX)(M = Li+,Na+,K+,Rb+,Cs+,X = F-,Cl-,Br-,I-)及其与生物分子的相互作用.该模型是专门设计来重现实验Kirkwood-Buff积分,从而溶液盐的活动,作为盐浓度的函数。此外,我们证明,这些模型合理地再现其他实验性质,包括离子扩散常数,介电衰减,和混合的多余热量。开发的参数,通过考虑使用先前建立的模型NaCl的水性NaX和MCl溶液的属性。转移到其他盐的参数,然后建立成功的模拟额外的盐水溶液,KI和CsBr,最初不包括在参数化程序。
A classical nonpolarizable force field is presented for the simulation of aqueous alkali halide solutions (MX), where M = Li+, Na+, K+, Rb+, Cs+ and X = F−, Cl−, Br−, I−, and their interactions with biomolecules. The models are specifically designed to reproduce the experimental Kirkwood-Buff integrals, and thereby the solution salt activities, as a function of salt concentration. Additionally, we demonstrate that these models reasonably reproduce other experimental properties including ion diffusion constants, dielectric decrements, and the excess heats of mixing. The parameters are developed by considering the properties of aqueous NaX and MCl solutions using a previously established model for NaCl. Transferability of the parameters to other salts is then established by the successful simulation of additional aqueous salt solutions, KI and CsBr, not originally included in the parameterization procedure.
DOI: 10.1021/jp904806f
发表时间: 2009-09-10
期刊: The journal of physical chemistry. B
影响因子: --
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