Abstract
The selective capture of Cs+ from solution is relevant to the remediation of nuclear waste and remains a significant challenge. Here we describe a new framework composed of [(CH3)2 NH 2]+ and [Ga2 Sb2 S7] 2- layers, which are perforated with holes. Shape selectivity couples with framework flexibility, allowing the compound to respond to the ion-exchange process. The size, shape and flexibility of the holes allow Cs+ ions in an aqueous solution to selectively pass through and enter the material via an ion-exchange process. Following capture, the structure dynamically closes its holes in a manner reminiscent of a Venus flytrap, which prevents the Cs + ions from leaching out. This process has useful implications in the separation science of Cs as it relates to the clean-up of nuclear waste. The dynamic response we describe here provides important insights for designing new materials for the selective removal of difficult-to-capture ions.
Original language | English |
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Pages (from-to) | 187-191 |
Number of pages | 5 |
Journal | Nature chemistry |
Volume | 2 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2010 |
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)