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Structural transition to electrolyte-water solvent and changes in the molecular dynamics of water and properties of solutions

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Abstract

A model of concentration transition “ions and complexes in a water structure → ionic and ionicaqueous clusters → polymer structures of salt and crystal hydrate melts” is suggested. The appearance of cluster nanostructures outside the first zone of a waterlike structure is regarded as a general characteristic of solutions. The characteristics of solutions, phase equilibria, and salts of complex composition are interpreted based on this model. Investigation of the complex dielectric constant of electrolytic solutions in the SHF and EHF bands (7–119 GHz) at high concentrations showed that there are two dispersion regions in which the relaxation times differ by a factor of 5–10. Relaxation processes are separated, the numbers of molecules in hydration shells are calculated, and relaxation times are determined for bulky tetrahedral water with hydration shells of ions, for clusters, and for ionicaqueous polymer chains. It is shown that the two structure subsystems of water molecules in concentrated solutions may be described using the limited rotator/generalized diffusion molecular model.

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Authors and Affiliations

  1. N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, USSR

    A. K. Lyashchenko & A. Yu. Zasetskii

Authors
  1. A. K. Lyashchenko
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  2. A. Yu. Zasetskii
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Translated fromZhumal Strukturnoi Khimii, Vol. 39, No. 5, pp. 851–863, September–October, 1998.

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Lyashchenko, A.K., Zasetskii, A.Y. Structural transition to electrolyte-water solvent and changes in the molecular dynamics of water and properties of solutions. J Struct Chem 39, 694–703 (1998). https://doi.org/10.1007/BF02903542

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  • DOI: https://doi.org/10.1007/BF02903542

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