纳米笼
化学
锕系元素
邻苯三酚
镅
镧系元素
萃取(化学)
核化学
无机化学
色谱法
有机化学
离子
催化作用
作者
Lei Mei,Peng Ren,Qun-Yan Wu,Yubin Ke,Jun-Shan Geng,Kang Liu,Xueqing Xing,Zhiwei Huang,Kexin Hu,Yalan Liu,Liyong Yuan,Guang Mo,Zhonghua Wu,John K. Gibson,Zhifang Chai,Wei‐Qun Shi
摘要
The separation of actinides has a vital place in nuclear fuel reprocessing, recovery of radionuclides, and remediation of environmental contamination. Here we propose a new paradigm of nanocluster-based actinide separation, namely, nanoextraction, that can achieve efficient sequestration of uranium in an unprecedented form of giant coordination nanocages using a cone-shaped macrocyclic pyrogallol[4]arene as the extractant. The U24-based hexameric pyrogallol[4]arene nanocages with distinctive [U2(PG)2] binuclear units (PG = pyrogallol) that rapidly assembled in situ in monophasic solvent were identified by single-crystal X-ray diffraction, MALDI-TOF mass spectrometry, NMR spectroscopy, and small-angle X-ray and neutron scattering. Comprehensive biphasic extraction studies showed that this novel separation strategy has enticing advantages such as fast kinetics, high efficiency, and good selectivity over lanthanides, thereby demonstrating its potential for efficient separation of actinide ions.
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