Task-Specific Ionic Liquids Bearing 2-Hydroxybenzylamine Units: Synthesis and Americium-Extraction Studies

A. Ouadi (1) , Benoît Gadenne (2) , Peter Hesemann (2) , Joël J.E. Moreau (2) , I. Billard (1) , C. Gaillard (1) , S. Mekki (1, 3) , Gilles Moutiers (3)

1 IReS - Institut de Recherches Subatomiques
2 UMR 5076 - Hétérochimie Moléculaire et Macromoléculaire
3 SCP - Service de Chimie Physique

The synthesis of two task-specific ionic liquids (TSILs) bearing 2-hydroxybenzylamine entities is described. These compounds are based on an imidazolium substructure onto which one hydrobenzylamine-complexing moiety is grafted. We have demonstrated that, whether pure or diluted, TSIL is able to extract americium ions. Furthermore, recovery of americium from the IL phase into a receiving phase can be achieved under acidic conditions. A possible mechanism for the metal-ion partitioning is presented, in which the extraction system is driven by an ion-exchange mechanism.

Mots clés: americium; green chemistry; ion exchange; ionic liquids; solvent extraction

Domaines: Chimie de coordination; Chimie organique

A. Ouadi, Benoît Gadenne, Peter Hesemann, Joël J.E. Moreau, I. Billard, et al.. Task-Specific Ionic Liquids Bearing 2-Hydroxybenzylamine Units: Synthesis and Americium-Extraction Studies. Chemistry - A European Journal, 2006, 12 (11), pp.3074-3081. ⟨10.1002/chem.200500741⟩. ⟨hal-00178038⟩