N-donor ligands such as n-Pr-BTP [2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine] preferentially bind trivalent actinides (An) over trivalent lanthanides (Ln) in liquid-liquid separation. However, the chemical and physical processes responsible for this selectivity are not yet well understood. Here, an explorative comparative X-ray spectroscopy and computational (L-edge) study for the An/Ln L-edge and the N K-edge of [An/Ln(n-Pr-BTP)](NO), [Ln(n-Pr-BTP)](CFSO) and [Ln(n-Pr-BTP)](ClO) complexes is presented. High-resolution X-ray absorption near-edge structure (HR-XANES) L-edge data reveal additional features in the pre- and post-edge range of the spectra that are investigated using the quantum chemical codes FEFF and FDMNES. X-ray Raman spectroscopy studies demonstrate the applicability of this novel technique for investigations of liquid samples of partitioning systems at the N K-edge.
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| http://dx.doi.org/10.1107/S1600577521012091 | DOI Listing |
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