Spectroscopic investigation of the different complexation and extraction properties of diastereomeric diglycolamide ligands-Reference-Cited by-同舟云学术

Spectroscopic investigation of the different complexation and extraction properties of diastereomeric diglycolamide ligands

Published:2022-04-26 Issue:5 Volume:110 Page:291-300
ISSN:0033-8230
Container-title:Radiochimica Acta
language:en
Short-container-title:

Author:

Weßling Patrik¹²,Trumm Michael²,Sittel Thomas¹²,Geist Andreas²,Panak Petra J.¹²

Affiliation:

1. Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, 76021 Karlsruhe , Germany

2. Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany

Abstract

Abstract (2R,2′S)-2,2′-oxybis-(N,N-didecylpropanamide) (cis-mTDDGA) and (2R,2′R)-2,2′-oxybis-(N,N-didecylpropanamide) (trans-mTDDGA) were studied using time-resolved laser fluorescence spectroscopy (TRLFS), vibronic side-band spectroscopy (VSBS) and density functional theory calculations (DFT) to find reasons for their different extraction properties. Stability constants of the respective Cm(III) and Eu(III) complexes show cis-mTDDGA to be the superior ligand which is in agreement with results from extraction experiments. cis-mTDDGA extracts Cm(III) and Eu(III) as 1:3 complexes. In case of trans-mTDDGA, 1:2 complexes of the form [M(trans-mTDDGA)2(η1-NO3)(H2O)2]2+ (M = Cm, Eu) are extracted additionally to the 1:3 complexes. VSBS and DFT confirm the presence of inner-sphere nitrate in the 1:2 complex.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/ract-2021-1134/pdf

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