Abstract
We indicated, in our previous work, that tetraethylammonium (Et4N+) ion is solvated in an aqueous polymer solution in a similar fashion to in water, and the Et4N+ electrode can be used for a reference for the determination of transfer thermodynamic values. On the basis of this finding, we have evaluated the Gibbs free energy of transfer of selected ions from water to aqueous hydrophilic polymer solutions such as poly (ethylene glycol) and poly (acrylic acid) . X-ray absorption fine structure (XAF) measurements have allowed us to discuss the structural aspects of ions in the aqueous polymer solutions.
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