Computer Science
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010natch...2..187d&link_type=abstract
Nature Chemistry, Volume 2, Issue 3, pp. 187-191 (2010).
Computer Science
1
Scientific paper
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)2NH2]+ and [Ga2Sb2S7]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.
Ding Nan
Kanatzidis Mercouri G.
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