RadChem 2018

Session

TAN 2

TAN.2

15 May 2018, 08:30

Casino Conference Centre

Conveners

TAN 2

• Alexander Yakushev (GSI Helmholtzzentrum für Schwerionenforschung GmbH)
• Peter Burns (University of Notre Dame)

604. Paramagnetic NMR investigations in metal-organic complexes of tetravalent actinides with soft-donor ligands

Dr Peter Kaden (Helmholtz-Zentrum Dresden - Rossendorf e. V.)

15/05/2018, 08:30

Chemistry of Actinide and Trans-actinide Elements

Verbal

Electronic interactions between metal and ligand are the origin of additional NMR chemical shifts observed on nuclei of the ligand in paramagnetic metal-organic complexes. The major two contributors to these paramagnetic chemical shifts are Fermi-contact shifts (FCS) and pseudo-contact shifts (PCS). FCS are due to delocalisation of unpaired electron density in molecular orbitals involving both...

599. Coordination Chemistry of Uranium (U(IV) and -(VI)) with Bidentate N-donor Ligands

Dr Juliane März (Helmholtz-Zentrum Dresden - Rossendorf)

15/05/2018, 08:45

Chemistry of Actinide and Trans-actinide Elements

Verbal

Coordination Chemistry of Uranium (U(IV) and -(VI)) with Bidentate N-donor Ligands

Introduction
The bidentate N-donor ligands 2,2’-bipyridine (bipy) and 1,10-phenanthroline (phen) have attracted considerable attention in the field of coordination chemistry over the last decades because of their remarkable...

498. Complexation of americium(III) with citric acid : role of the hydroxo function ?

Christelle Tamain (CEA Marcoule)

15/05/2018, 09:00

Chemistry of Actinide and Trans-actinide Elements

Verbal

Alpha-hydroxycarboxylic acids are important molecules in nuclear field. They can be used as complexing agent or buffer in aqueous phase in actinide selective separation processes. These molecules are also present in the environment as a degradation product of cellulose. Therefore the alpha hydroxyl-carboxylate ligands are likely to influence the speciation in the fuel cycle processes and in...

728. Polydentate phosphinoxide-bearing N-heterocycles as extractants for f-elements

Dr Nataliya Borisova (Moscow State University)

15/05/2018, 09:15

Chemistry of Actinide and Trans-actinide Elements

Verbal

A new type of heterocyclic “hard-and-soft” phosphinoxide-bearing N-heterocycles for f-elements binding was proposed from the basis of DFT simulation (PBE, B3LYP, cc-pVDZ and cc-pVTZ basis sets). The efficient method for the scalable preparation of the reagents by cross-coupling reactions was developed. As a N-donor scaffold the pyridine, 2,2’-bipyridine and phenanthroline were used and their...

493. Thermodynamics of the complexation of neptunium (V) with halides in aqueous solution at elevated temperatures

Mr Martin M. Maiwald (Ruprecht-Karls Universität Heidelberg)

15/05/2018, 09:30

Chemistry of Actinide and Trans-actinide Elements

Verbal

Introduction
Deep geological salt rock formations are in discussion to serve as host rock for a repository of high-level nuclear waste. This approach requires a well-founded knowledge of the geochemical behaviour of the radionuclides in diluted to concentrated salt solutions to model their potential migration and retention in the near- and far-field of the repository over long time scales....

497. Actinide samples production at Mainz University for applications in chemistry and physics research

Christoph Düllmann (University Mainz)

15/05/2018, 09:45

Production and Application of Radionuclides

Verbal

Rare actinide isotopes are essential in many basic science research projects, yet working with them always features unique aspects, especially due to their limited availability and often high radioactivity. In our contribution, we will focus on actinide targets produced via molecular plating (MP) [1], a technique refined over decades and well-confirmed to be ideal in many cases. Recent...