Solvent Extraction: Structure of the Liquid-Liquid Interface Containing a Diamide Ligand

Journal Article · Mon Jun 20 00:00:00 EDT 2016 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.201603395· OSTI ID:1340301

Scoppola, Ernesto ^[1]; Watkins, Erik B. ^[2]; Campbell, Richard A. ^[3]; Konovalov, Oleg ^[4]; Girard, Luc ^[5]; Dufrêche, Jean-Francois ^[5]; Ferru, Geoffroy ^[6]; Fragneto, Giovanna ^[3]; Diat, Olivier ^[5]

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1. Institut Laue-Langevin, 38000 Grenoble France; Institut de Chimie Séparative de Marcoule, UMR 5257 CEA/CNRS/ENSCM/Université Montpellier, 30207 Bagnols-sur-Cèze France
2. Institut Laue-Langevin, 38000 Grenoble France; Materials Synthesis and Integrated Devices, Los Alamos National Laboratory, Los Alamos NM 87545 USA
3. Institut Laue-Langevin, 38000 Grenoble France
4. European Synchrotron Radiation Facility, 38430 Grenoble France
5. Institut de Chimie Séparative de Marcoule, UMR 5257 CEA/CNRS/ENSCM/Université Montpellier, 30207 Bagnols-sur-Cèze France
6. Argonne National Labororatory, Lemont IL 60439 USA

Knowledge of the (supra)molecular structure of an interface that contains amphiphilic ligand molecules is necessary for a full understanding of ion transfer during solvent extraction. Even if molecular dynamics already yield some insight in the molecular configurations in solution, hardly any experimental data giving access to distributions of both extractant molecules and ions at the liquid–liquid interface exist. Here, the combined application of X-ray and neutron reflectivity measurements represents a key milestone in the deduction of the interfacial structure and potential with respect to two different lipophilic ligands. Indeed, we show for the first time that hard trivalent cations can be repelled or attracted by the extractant-enriched interface according to the nature of the ligand.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE; Institut de Chimie Séparative de Marcoule (ICSM)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1340301
• Journal Information: Angewandte Chemie (International Edition), Vol. 55, Issue 32; ISSN 1433-7851
• Publisher: Wiley
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY