JRP CALL information
Supported By

European Commission

Short description of the work
Studies on metal-ligand interactions allow us to determine chemical affinity of actinides to the ligand studied as we move across the 5f-series. Fundamental information on the behaviour of actinides in solvent extraction processes can be gathered from the studies on actinide speciation in liquid media, on the thermodynamic and structural properties of their complexes with organic ligands, etc. New hydrophilic sulphonated BTP ligands were synthesized and proven to selectively complex trivalent actinides in HNO3 solutions The objective of this proposal was to characterize the complexes of U(IV,VI) and Pu(IV) via NMR and ESI‐MS and to determine their thermodynamic properties via microcalorimetry. Unfortunately, some difficulties with determination of 1:3 complexes caused that it was decided to perform some additional extraction-liquid-liquid experiments with Pu(IV). In the present work, we studied the distribution ratio of Pu(IV) in the two-phase systems: TODGA (in kerosene) / SO3-Ph-BTP (0–30 mM) in aqueous HNO3 (0.5-3.0 M). Based on the distribution ratios of the metal ions we determined the apparent stability constants of their SO3-Ph-BTP complexes in the aqueous phase.

Main visitor contact data
Organisation: INCT

JRP Identification
JRP nr: TALI-C04-17
JRP title: Coordination chemistry of uranium(IV, VI) and plutonium(IV) with a hydrophilic poly‐N‐dentate BTP ligand .
JRP scope: Scope 1: Actinide separation chemistry

Visited Associated Pooled Facility
Visited APF during the stay: CEA - ATALANTE
Name of the APF Contact Person: M-Ch. Charbonnel

Other APF and organisation involved in the JRP
Other organisations involved:
Other APF involved in the project:

Description of the work done at the associated pooled facility
Start date of the stay: 2/16/2015
End date of the stay: 5/7/2015
Quantity of access: 59
Access Unit: Days