Zaitseva I. Thermodynamic of complex formation between ammonium cation and crown-ethers in aqueous-organic solvents

Investigation objects: cations- ammonium, sodium, potassium; electronodonor ligands- 18-crown-6, DCG-18-crown-6. Purpose: to establish quantitative regularities of aqueous-organic solvents and temperature influence on complex formation between ammonium cation and crown ethers thermodynamic characteristics. Methods: potentiometry, conductometry, radiometry, gravimetric analysis. Quantitative connections between complex formation of sodium, potassium and ammonium cations with crown ethers thermodynamics and reagents solvatation have been estimated. Coronates stability thermodynamic classification in aqueous-organic solvents has been proposed. Application degree: working out of methodological base for forecasting and ion selectivity directing with crown-ethers and aqueousorganic solvents in model systems.