Abstract
The method of molecular–level computer simulation at the temperature of 298 K was used to study the fundamental regularities of formation of electric properties of the hydrate shell of the Na+ cation in a planar model nanopore with hydrophilic structureless walls in contact with water vapors. Electric polarizability changes nonmonotonously: as consistent with the changes in the molecular structure of the system. Hydration within the pore occurs in several stages, from formation of chain structures, microdrop compaction and ejection of the ion from its own hydrate shell to encapsulation and absorption of the ion by the solvent preceding formation of nanoelectrolyte. Despite the significant differences in the energy of retaining hydrate shells for Na+ and Cl─ ions, polarizabilities of the two systems are close and behave similarly under variation of conditions. Strong spatial anisotropy of the polarizability tensor of the ion–hydrate complex is due to the effect of the nanopore walls on multiparticle spatial correlations in the system.
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The paper is dedicated to the memory of academician V.A. Kistyakovskii (1865–1952).
Original Russian Text © S.V. Shevkunov, 2016, published in Elektrokhimiya, 2016, Vol. 52, No. 9, pp. 1022–1032.
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Shevkunov, S.V. Structure and electric properties of sodium ion hydrate shell in nanopore with hydrophilic walls. Russ J Electrochem 52, 910–919 (2016). https://doi.org/10.1134/S1023193516090093
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DOI: https://doi.org/10.1134/S1023193516090093