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Information × Registration Number 0203U008013, 0100U003272 , R & D reports Title A Theoretic Basis of the Purposeful Usage of Nonaqua Electrolyte Solutions in Electrochemical Devices and Processes popup.stage_title Head Vjunnik I., Доктор хімічних наук Registration Date 07-04-2003 Organization Kharkov National University named after V.N.Karazin popup.description2 Objects of investigation: dimethylsulphoxide, solutions of 1-1 and 2-1 electrolytes in : dimethylsulphoxide, solutions of LiBF4 in acetonitrile, solutions of 1-1 electrolytes in solvents with low dielectric permitivity. The aim of this work is studying and modelling of temperature-concentration dependencies of the specific electric conductivities and viscosity of electrolite solutions. Method of investigation: conductometry, viscosimetry. Limiting molar conductivities and ion association of LiBF4 in acetonitrile at 15-65 grad. C are determined by results of conductometric experiments. With their help and on the basis of the analysis of temperature-concentration dependence of specific electrical conductance it is established, that its temperature dependence is determined mainly by the temperature change of the limiting molar conductivity, where as the concentration dependence is determined by the change of the ionic concentration. A new technique of conductometric data processing for 1-1 electrolytes insolutions with a low dielectric constant taking into account the formation of complex ionic species, ion pairs and ion triples is developed and tested. In the research the scientific problem of improvement and development of the structural-dynamic concepts of inter-particle interactions in non-aqueous electrolyte solutions is solved. Due to this the applicability of the analytical expressions for concentration dependence of the relative dynamic viscosity of solutions for unsymmetrical and associated electrolytes is considerably extended, and also the new regularities of influence of the various factors on a character and intensity of inter-particle interactions in electrolyte solutions in aprotic solvents are found. The concept of ionic solvation dynamics is developed. In accordance with this concept the change of microviscosity of a solution occurs due to the modification of its structure in the vicinity of an ion as a result of specific short-range interactions of the latter with solvent molecules. The developed concept of dynamic solvation is extended for ionic complexes, that has allowed for the first time to evaluate quantitatively an intensity of interaction of ion complexes of 1-1 and 2-1 electrolytes with the nearest molecular environment from the viscosimetric data. Product Description popup.authors popup.nrat_date 2020-04-02 Close