Effective solvent mediated potentials of Na+ and Cl− ions in aqueous solution: temperature dependence
2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, no 13, 5722-5727 p.Article in journal (Refereed) Published
The effective solvent-mediated potentials for Na+ and Cl− ions in aqueous solution were calculated in a wide range of temperatures from 0 to 100 °C. The potentials have been determined using the inverse Monte Carlo approach, from the ion–ion radial distribution functions computed in 50 ns molecular dynamics simulations of ions and explicit water molecules. We further separated the effective potentials into a short-range part and an electrostatic long-range part represented by a coulombic potential with some dielectric permittivity. We adjusted the value of the dielectric permittivity to provide the fastest possible decay of the short-range potentials at larger distances. The obtained temperature dependence of the dielectric permittivity follows well the experimental data. We show also that the largest part of the temperature dependence of the effective potentials can be attributed to the temperature-dependent dielectric permittivity.
Place, publisher, year, edition, pages
2011. no 13, 5722-5727 p.
ion solution, Monte Carlo
Research subject Physical Chemistry
IdentifiersURN: urn:nbn:se:su:diva-67063DOI: 10.1039/C0CP02397COAI: oai:DiVA.org:su-67063DiVA: diva2:469420
FunderSwedish Research Council