An Operationally Simple Method for Separating the Rare-Earth Elements Neodymium and Dysprosium
An Operationally Simple Method for Separating the Rare-Earth Elements Neodymium and Dysprosium
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DOI：
10.1002/anie.201501659
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发表时间：
2015-07-06
影响因子：
16.6
通讯作者：
Schelter, Eric J.
中科院分区：
文献类型：
--
作者：
Bogart, Justin A.;Lippincott, Connor A.;Schelter, Eric J.
稀土金属是电子材料和永磁体的重要组成部分。回收消费材料是一种有前途的稀土新来源。为了鼓励回收，显然需要简单的方法来有针对性地分离稀土金属盐的混合物。三脚架氮氧配体[{（2-（BuNO）-Bu-t）C6 H4 CH 2}（3）N]（3-）（TriNOx（3-））的金属配合物，特征在于由其三个（2）-（N，O）配体臂形成的尺寸敏感孔。金属阳离子在孔中的暴露诱导包含[M（TriNOx）thf]/ [M（TriNOx）]（2）（M=稀土金属）的自缔合平衡。早期和晚期金属的平衡常数（K-eq）的差异，使简单的Nd/Dy分离，通过浸出分离比S-Nd/Dy=359。
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-(BuNO)-Bu-t)C6H4CH2}(3)N](3-) (TriNOx(3-)), feature a size-sensitive aperture formed of its three (2)-(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 (K-eq) for early and late metals enables simple Nd/Dy separations through leaching with a separation ratio S-Nd/Dy=359.