Chernozhuk T. Electrical conductivity, solvatation and interparticle interactions in lithium salts solutions in g-butyrolaktone, propylene carbonate and a mixtures of propylene carbonate with 1,2-dimethoxyethane.

The regularities peculiarities of the effect of temperature, nature of solvent, nature and size of ions on the characteristics of interparticle interactions, electrical conductivity and ion solvation, thermodynamics of ionic association in solutions of 1-1 electrolytes in propylene carbonate, g-butyrolactone and propylene carbonate-based mixtures with 1,2-dimethoxyethane were elucidated. According to the results of a comprehensive study of the selected ion-molecular systems by the methods of dielcometry, conductometry, molecular dynamics simulation and theoretical statistical mechanics description, the method for prediction of the limiting ion molar conductivity and thermodynamic characteristics of ionic association have been offered. An essential difference in the temperature dependence of the Pisarzhevskyi-Walden product for singly charged ions in g-butyrolactone, propylene carbonate and its mixtures with 1,2-dimethoxyethane has been established. The microscopic nature of solvophilous solvation of lithium cation and solvophobous solvation of tetrabutylammonium cation in aprotic dipolar solvents was elucidated on the example of propylene carbonate using experimental data on the boundary molar ionic conductivity and the results of classical molecular dynamics simulation. The analysis of an array of own and literature data on the association constants of 1-1 electrolytes in non-aqueous solvents within the statistical mechanics description of ionic association with the use of the Ramanathan-Friedman model allowed offering a universal method for predict in of association constants of 1-1 electrolytes in non-aqueous solvents in a wide temperature range.