Ak. Lyashchenko et Ay. Zasetskii, Structural transition to electrolyte-water solvent and changes in the molecular dynamics of water and properties of solutions, J STRUCT CH, 39(5), 1998, pp. 694-703
A model of concentration transition "ions and complexes in a water structur
e --> ionic and ionic-aqueous clusters --> polymer structures of salt and c
rystal hydrate melts" is suggested. The appearance of cluster nanostructure
s outside the first zone of a water-like structure is regarded as a general
characteristic of solutions. The characteristics of solutions, phase equil
ibria, and salts of complex composition are interpreted based on this model
. Investigation of the complex dielectric constant of electrolytic solution
s in the SHF and EHF bands (7-119 GHz) at high concentrations showed that t
here are two dispersion regions in which the relaxation times differ by a f
actor 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 f
or ionic-aqueous polymer chains. It is shown that the two structure subsyst
ems of wafer molecules in concentrated solutions may be described using the
limited rotator/generalized diffusion molecular model.