Functional ionic compounds for asymmetric catalysis and separation: Application on the synthesis of nanostructured silica bearing ionic substructures

I&EC 132

Peter Hesemann, peter.hesemann@enscm.fr1, Benoît Gadenne1, Joël JE. Moreau1, Ali Ouadi2, Isabelle Billard2, Clotilde Gaillard2, and Gilles Moutiers3. (1) Architectures moléculaires et matériaux nanostructurés, Ecole Nationale Supérieure de Chimie, 8 rue de l'Ecole Normale, 34296 Montpellier cedex 5, France, (2) Chimie Nucléaire, Institut de Recherches Subatomiques (IReS), BP28, 67037 Strasbourg Cedex 2, France, B. P. 28, 67037 Strasbourg Cedex 2, France, (3) Department of physical chemistry, CEA, DEN/DPC/SCP, 91191 Gif-sur-Yvette, France, CEA Saclay, 91191 Gif sur Yvette, France
We studied task-specific ionic liquids bearing metal complexing substructures for asymmetric catalysis and liquid-liquid extraction. Camphor- and BINOL functionalized ionic compounds are efficient ligands in homogeneous asymmetric catalysis. The ionic substructure allows an appropriate tuning of the solubility in order to ensure recycling of the chiral ionic auxiliary. The re-used ionic ligands showed similar catalytic properties in each reaction cycle. Ionic 2-hydroxybenzylamines were used in the liquid-liquid extraction of americium(III). The water immiscible functional ionic liquids served as both extracting agent and reception phase for the Am(III) species. Distribution coefficients up to 40 were observed depending on the extraction conditions.

A second research axis concerns the incorporation of functional ionic species in nanostructured silica via a template directed hydrolysis-polycondensation. This technique resulted in an increased regularity of the obtained functionalized silica materials and offers a new access to supported ionic liquid phases with defined architectures on a nanometric scale.

 

Ionic Liquids: Not Just Solvents Anymore OR Ionic Liquids: Parallel Futures (Sponsored by Green Chemistry and Engineering, Separation Science and Technology and Novel Chemistry with Industrial Applications Sub-Divisions)
8:00 PM-10:00 PM, Sunday, 26 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster

Division of Industrial and Engineering Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006