Description

Contacts : Vladimir Sladkov, Veronika Zinovyeva and Jérôme Roques

This research topic of the CHIMèNE team is focused on studies of chemical equilibria (hydrolysis, complexation, redox…) of f- and d- elements in aqueous and ionic liquid media. The thermodynamic and kinetic data on these equilibria are important not only for fundamental knowledge, but they have also practical applications for radionuclide environmental monitoring, in medical field and for electrical energy production.

The number of physicochemical experimental methods (spectrophotometry, capillary electrophoresis, electrochemistry…) is successfully used for revealing and characterizing of chemical equilibria (Figure 1). To confirm the experimental data and to obtain the information on the structural parameters and on the chemical bond nature of the complex species, numerical simulations are performed using the density functional theory (DFT) approach.

Figure 1- Chemical equilibria and methods used for their studies

 

We develop this work for several potential applications (Figure 2) : 
Figure 2 – Potential applications

Collaborations

Health physics pole at IJCLab, University of Burgundy, University of Strasbourg, IRSN, CEA, Triskem

Thesis in progress

● Emanuele Zanda (since 2020) : Complexation of Th(IV), Zr(IV) and U(IV) with hydroxamic acid ligands

Recent articles

● V. Sladkov, J. Roques, M. Meyer. Assignment of complex species by affinity capillary electrophoresis: The case of Th(IV)desferrioxamine B. Electrophoresis 41 (2020) 1870-1877

● V. Sladkov, M. He, P. Jewula, M-J. Penouilh, S. Brandes, C. Stern, J-C. Chambron, M. Meyer. A solution and gas-phase study of uranyl hydroxamato complexes. Journal of Radioanalytical and Nuclear Chemistry 318 (2018) 259-266

● A. Sornosa-Ten, P. Jewula, T. Fodor, S. Brandès, V. Sladkov, Y. Rousselin, C. Stern, J-C. Chambron and M. Meyer. Effects of preorganization in the chelation of UO22+ by hydroxamate ligands: cyclic PIPO vs. linear NMA. New Journal of Chemistry 42 (2018) 7765-7779

● V. Sladkov, A.A. Bessonov, J. Roques, I.A. Charushnikova and A.M. Fedosseev. Complexation of An(VI) with succinic acid in aqueous acid solutions: uranyl vs. plutonyl. New Journal of Chemistry 42 (2018) 7780-7788

● V. Sladkov. Affinity capillary electrophoresis in studying the complex formation equilibria of radionuclides in aqueous solution. Electrophoresis 37 (2016) 2558-2566