The biphasic transfer of Eu(NO3)3 by trioctylphosphine oxide (TOPO) diluted in a molecular diluent or as a component of a hydrophobic eutectic solvent (HES) was studied by two-phase isothermal titration calorimetry and complemented by XAS, FTIR, and NMR spectroscopy. In HES, the solvent intermolecular interactions introduce an enthalpic penalty, which is overcompensated by a reduction of the entropic cost of Eu(III) phase transfer, resulting in enhanced metal partitioning.
Identifying the Thermodynamic Driving Force of Metal Extraction by Hydrophobic Eutectic Solvents / Vaz, I.C.M., Saldanha Pinheiro, M., Olea, F., Cirillo, L., Mannucci, G., Busato, M., D'Angelo, P., Santos, R., Bastos, M., Santos, L.M.N.B.F., Coutinho, J.A.P., Schaeffer, N.. - In: CHEMSUSCHEM. - ISSN 1864-5631. - 19:11(2026), pp. 1-6. [10.1002/cssc.70794]
Identifying the Thermodynamic Driving Force of Metal Extraction by Hydrophobic Eutectic Solvents
Cirillo L.;Mannucci G.;Busato M.;D'Angelo P.;
2026
Abstract
The biphasic transfer of Eu(NO3)3 by trioctylphosphine oxide (TOPO) diluted in a molecular diluent or as a component of a hydrophobic eutectic solvent (HES) was studied by two-phase isothermal titration calorimetry and complemented by XAS, FTIR, and NMR spectroscopy. In HES, the solvent intermolecular interactions introduce an enthalpic penalty, which is overcompensated by a reduction of the entropic cost of Eu(III) phase transfer, resulting in enhanced metal partitioning.| File | Dimensione | Formato | |
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