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Comparative NMR Study of nPrBTP and iPrBTP

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

Abstract (englisch): 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.

Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1016/j.proche.2016.10.006
ISSN: 1876-6196
URN: urn:nbn:de:swb:90-626427
KITopen ID: 1000062642
HGF-Programm 32.01.11; LK 01
Erschienen in Procedia chemistry
Band 21
Seiten 38–45
Lizenz CC BY-NC-ND 4.0: Creative Commons Namensnennung – Nicht kommerziell – Keine Bearbeitungen 4.0 International
Bemerkung zur Veröffentlichung ATALANTE 2016 International Conference on Nuclear Chemistry for Sustainable Fuel Cycles
Schlagworte NMR Spectroscopy; Bonding; Extraction; BTP; An(III)/Ln(III) separation
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