Crown ethers in graphene

Junjie Guo, Jaekwang Lee, Cristian I. Contescu, Nidia C. Gallego, Sokrates T. Pantelides, Stephen J. Pennycook, Bruce A. Moyer and Matthew F. Chisholm ()
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Junjie Guo: Oak Ridge National Laboratory
Jaekwang Lee: Oak Ridge National Laboratory
Cristian I. Contescu: Oak Ridge National Laboratory
Nidia C. Gallego: Oak Ridge National Laboratory
Sokrates T. Pantelides: Oak Ridge National Laboratory
Stephen J. Pennycook: Oak Ridge National Laboratory
Bruce A. Moyer: Oak Ridge National Laboratory
Matthew F. Chisholm: Oak Ridge National Laboratory

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Crown ethers are at their most basic level rings constructed of oxygen atoms linked by two- or three-carbon chains. They have attracted attention for their ability to selectively incorporate various atoms or molecules within the cavity formed by the ring. However, crown ethers are typically highly flexible, frustrating efforts to rigidify them for many uses that demand higher binding affinity and selectivity. Here we present atomic-resolution images of the same basic structures of the original crown ethers embedded in graphene. This arrangement constrains the crown ethers to be rigid and planar. First-principles calculations show that the close similarity of the structures should also extend to their selectivity towards specific metal cations. Crown ethers in graphene offer a simple environment that can be systematically tested and modelled. Thus, we expect that our finding will introduce a new wave of investigations and applications of chemically functionalized graphene.

Date: 2014
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DOI: 10.1038/ncomms6389

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