In this study, we determined the stability of some fully N-methyl substituted polycation-inorganic polyanion complexes by potentiometric measurements at t ) 25 °C. As for other previously studied similar systems, the stability of ALHr species (A ) amine; L ) inorganic polyanion; r ) 1, 2, ... m, with m g n, n ) maximum protonation degree of the amine) is a function of the charges involved in the formation equilibrium. The basicity of the polyanion also plays a fairly significant role. The stability of these species is compared with that of analogous species of unsubstituted amines and with that of polyammoniumcarboxylate complexes. Simple predictive stability relationships are given.
Binding of phosphate, pyrophosphate, and hexacyanoferrate(II) by fully N-methyl substituted polyantmonium cations in aqueous solution
CREA, Francesco;DE ROBERTIS, Alessandro;DE STEFANO, Concetta;FOTI, Claudia;SAMMARTANO, Silvio
2004-01-01
Abstract
In this study, we determined the stability of some fully N-methyl substituted polycation-inorganic polyanion complexes by potentiometric measurements at t ) 25 °C. As for other previously studied similar systems, the stability of ALHr species (A ) amine; L ) inorganic polyanion; r ) 1, 2, ... m, with m g n, n ) maximum protonation degree of the amine) is a function of the charges involved in the formation equilibrium. The basicity of the polyanion also plays a fairly significant role. The stability of these species is compared with that of analogous species of unsubstituted amines and with that of polyammoniumcarboxylate complexes. Simple predictive stability relationships are given.Pubblicazioni consigliate
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