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Comparative NMR study of nPrBTP and iPrBTP

 
: Adam, C.; Rohde, V.; Müllich, U.; Kaden, P.; Geist, A.; Panak, P.J.; Geckeis, H.

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Fulltext (PDF; )

Procedia chemistry. Online journal 21 (2016), pp.38-45
http://www.sciencedirect.com/science/journal/18766196
ISSN: 1876-6196
International Conference on Nuclear Chemistry for Sustainable Fuel Cycles <5, 2016, Montpellier>
Bundesministerium für Bildung und Forschung BMBF
02NUK020A
Bundesministerium für Bildung und Forschung BMBF
02NUK020D
English
Journal Article, Conference Paper, Electronic Publication
Fraunhofer ICT ()

Abstract
Bistriazinyl-pyridine type ligands are important extracting agents for separating trivalent actinide ions from trivalent lanthanides. The alkyl substituents on the lateral triazine rings have a significant effect on the stability of the ligand against hydrolysis and radiolysis. Furthermore they influence solubility, extraction behaviour and selectivity. TRLFS and extraction studies suggest differences in complexation and extraction behaviour of BTP ligands bearing iso-propyl or n-propyl substituents, respectively. As NMR studies allow insight into the metal-ligand bonding, we conducted NMR studies on a range of 15N-labelled nPrBTP and iPrBTP Ln(III) and Am(III) complexes. Our results show that no strong change in the metal-ligand bonding occurs, thus excluding electronic reasons for differences in complexation behaviour, extraction kinetics and selectivity. This supports mechanistic reasons for the observed differences.

: http://publica.fraunhofer.de/documents/N-467556.html