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Information × Registration Number 0203U008018, 0100U003273 , R & D reports Title Quantitative characteristics of complexation processes in heterogeneous and microgeterogeneous media popup.stage_title Head Loginova L.P., Registration Date 10-04-2003 Organization Kharkov National University named after V.N.Karazin popup.description2 The objects of the investigations are diphosphonic acids. Here the purpose is to obtain quantitative characteristics of equilibrium of protolyte processes and complex formation of diphosphonic acids in aqueous solutions and microheterogeneous media. The investigations methods used showed that pH-metric titration, competition pH-metry and direct potentiometry with copper selective electrode. In aqueous solutions and in the presence of micelles of ionic surfactants the acid-basic and complex formation properties of diphosphonic acids (methylendiphosphonic, ethane-1-hydroxy-1,1-diphosphonic, dimethylmethylendiphosphonic, dioxtylmethylendisphosphonic, diphenyloxyetylendisphosphonic, diphenylmethylendisphosphonic) have been investigated. In aqueous solutions and microheterogeneous media the constants of dissociation of acids and stability constants of complex with Mg(II) and Cu(II) have been determined. The acidity of disphosphonic acids decreases in the presence of anionic microaggregates and increases inthe presence of cationic surfactant by comparison with aqueous solutions. The effect of microheterogeneous media on the acid dissociation constants are explained by specials of bind of products of graded dissociation of diphosphonic acids by micellar pseudophase of ionic surfactants. Regularities of the effect of microheterogeneous media and the presence of deputies in phosphonic groups on the ability of anions of diphosphonic acids form complex with Mg(II) and Cu(II) have been revealed. It has been suggested, that the difference lg K between aqueous and micellar solutions be used to estimate the partition coefficient of reactants (complexes, ligands) in the system micelle-water. The results of an investigation permit prediction of behavior of organophosphorous complexones in practical uses. Product Description popup.authors popup.nrat_date 2020-04-02 Close