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- Title
An Operationally Simple Method for Separating the Rare-Earth Elements Neodymium and Dysprosium.
- Authors
Bogart, Justin A.; Lippincott, Connor A.; Carroll, Patrick J.; Schelter, Eric J.
- Abstract
Rare-earth metals are critical components of electronic materials and permanent magnets. Recycling of consumer materials is a promising new source of rare earths. To incentivize recycling there is a clear need for simple methods for targeted separations of mixtures of rare-earth metal salts. Metal complexes of a tripodal nitroxide ligand [{(2-tBuNO)C6H4CH2}3N]3- (TriNOx3-), feature a size-sensitive aperture formed of its three η2-(N,O) ligand arms. Exposure of metal cations in the aperture induces a self-associative equilibrium comprising [M(TriNOx)thf]/ [M(TriNOx)]2 (M=rare-earth metal). Differences in the equilibrium constants (Keq) for early and late metals enables simple Nd/Dy separations through leaching with a separation ratio SNd/Dy=359.
- Subjects
NEODYMIUM; RARE earth metals; DYSPROSIUM; NITROXIDES; METAL complexes
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 28, p8340
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/anie.201501659