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Investigations of clustering of ions and diffusivity in concentrated aqueous solutions of lithium chloride by molecular dynamic simulations

机译:分子动态模拟对氯化锂浓缩水溶液中离子和扩散性的研究

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摘要

The interactions between lithium (Li+) ions, chloride (Cl-) ions and water molecules in aqueous LiCl solutions and their effect on the dynamic and equilibrium properties of the salt solutions have been investigated by molecular dynamics (MD) simulations. The optimized potentials for liquid simulations for all atoms (OPLS-AA) force field have been used to study various properties of lithium chloride solutions for the concentrations, in the range of 0.1 M to 19.28 M. The MD simulation with the OPLS-AA force field gives a fair explanation of many important properties of alkali salt solutions which are in agreement with the experimental results. A microscopic description of LiCl solutions and diffusivity of LiCl obtained by simulation are in good agreement with the experimental data. The MD simulation indicated a strong solvation of monovalent ions in water and cluster formation of the cations at higher salt concentrations. The diffusion coefficient of LiCl decreases depending on the coordination structure of ions that changes with the salt concentration.
机译:通过分子动力学(MD)模拟研究了LiCL溶液中锂(Li +)离子,氯化物(Cl-)离子和水分子的相互作用及其对盐溶液的动态和平衡性质的影响。所有原子(OPLS-AA)力场的液体模拟的优化电位已被用于研究浓度的氯化锂溶液的各种性质,在0.1μm至19.28m的范围内。使用OPLS-AA力的MD模拟现场对碱性盐溶液的许多重要特性进行了公平的解释,这些属性与实验结果一致。通过模拟获得的LiCl解决方案的显微镜描述和通过模拟获得的LiCl的扩散性与实验数据很好。 MD模拟表明,在较高盐浓度下阳离子的水和簇形成的强溶解。 LiCL的扩散系数根据与盐浓度变化的离子的配位结构而降低。

著录项

  • 来源
    《RSC Advances》 |2015年第20期|共10页
  • 作者单位

    Inst Chem Technol Dept Chem Engn Bombay 400019 Maharashtra India;

    Inst Chem Technol Dept Chem Engn Bombay 400019 Maharashtra India;

    Inst Chem Technol Dept Chem Engn Bombay 400019 Maharashtra India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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