Halide and sodium ion parameters for modeling aqueous solutions in TIP5P-Ew water

Ivan Gladich, Paul Shepson, Igal Szleifer, Marcelo Carignano

Research output: Contribution to journalArticle

15 Citations (Scopus)


We present new Lennard-Jones parameters for the halide ions Cl-, Br- and I- and for the alkali ion Na+, to be used in combination with the TIP5P-Ew water model. Molecular dynamics simulations and thermodynamics integration are used to obtain one set of parameters to reproduce the experimental hydration free energy, the ion-oxygen coordination number and the structure of the solvation layer. The reported parameters reproduce the experimental hydration free energies within the numerical uncertainty of the simulations and their prediction of structural quantities are in good agreement with experimental results. The diffusion coefficients are calculated as a further test: the obtained parameters provide a reasonable prediction of experimental diffusion coefficients.

Original languageEnglish
Pages (from-to)113-117
Number of pages5
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 1 Apr 2010


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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