Design and coordination behavior of the first selective recognition ligand of 147Pm(III)

Dalton Transactions : an International Journal of Inorganic Chemistry
Weisheng LiuMinyu Tan

Abstract

A new amide tripodal ligand, 6-[2-(2-diethylamino-2-oxoethoxy)ethyl]-N,N,12-triethyl-11-oxo-3,9-dioxa-6,12-diazatetradecanamide (4) has been designed and synthesized for the recognition of rare earth ions. Three representative complexes of trivalent lighter (La), middle (Gd), and heavier (Er) rare earth ions with 4 were synthesized and characterized by X-ray crystallography. In the complex, the heptadentate forms a cup-like coordination cavity encapsulating the central ion. Different supramolecular complex dimers are constructed by pi-pi interaction and van der Waals forces in accordance with the lanthanide contraction. The differences of the cavity and dimer structures were investigated further by assessing the separation efficiency of in multitrace solvent extraction of rare earth ions from picrate acid solution and the ligand has the best separation factor for 147Pm(III).

Citations

Jan 1, 2008·Acta Crystallographica. Section E, Structure Reports Online·Wei-Sheng LiuDa-Qi Wang
Aug 10, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Ana de Bettencourt-DiasAyuk M Ako

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