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Comparative NMR Study of nPrBTP and iPrBTP

Adam, Christian; Rohde, Viktoria; Müllich, Udo; Kaden, Peter; Geist, Andreas ORCID iD icon; Panak, Petra J.; Geckeis, Horst


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.

Volltext §
DOI: 10.5445/IR/1000062642
DOI: 10.1016/j.proche.2016.10.006
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1876-6196
KITopen-ID: 1000062642
HGF-Programm 32.01.11 (POF III, LK 01) Extraktions- und Koordinationschemie der Actiniden
Erschienen in Procedia chemistry
Verlag Elsevier
Band 21
Seiten 38–45
Bemerkung zur Veröffentlichung ATALANTE 2016 International Conference on Nuclear Chemistry for Sustainable Fuel Cycles
Schlagwörter NMR Spectroscopy, Bonding, Extraction, BTP, An(III)/Ln(III) separation
Nachgewiesen in Dimensions
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