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Instruments / Technical Area	Publication Details	Published	Actions
I11-High Resolution Powder Diffraction I19-Small Molecule Single Crystal Diffraction	Separation of rare gases and chiral molecules by selective binding in porous organic cages Linjiang Chen , Paul S. Reiss , Sam Chong , Daniel Holden , Kim E. Jelfs , Tom Hasell , Marc A. Little , Adam Kewley , Michael E. Briggs , Andrew Stephenson , K. Mark Thomas , Jayne A. Armstrong , Jon Bell , Jose Busto , Raymond Noel , Jian Liu , Denis M. Strachan , Praveen K. Thallapally , Andrew I. Cooper Nature Materials DOI: 10.1038/nmat4035 Diamond Proposal Number(s): [7040, 8728] Show Abstract ▼ Abstract: The separation of molecules with similar size and shape is an important technological challenge. For example, rare gases can pose either an economic opportunity or an environmental hazard and there is a need to separate these spherical molecules selectively at low concentrations in air. Likewise, chiral molecules are important building blocks for pharmaceuticals, but chiral enantiomers, by definition, have identical size and shape, and their separation can be challenging. Here we show that a porous organic cage molecule has unprecedented performance in the solid state for the separation of rare gases, such as krypton and xenon. The selectivity arises from a precise size match between the rare gas and the organic cage cavity, as predicted by molecular simulations. Breakthrough experiments demonstrate real practical potential for the separation of krypton, xenon and radon from air at concentrations of only a few parts per million. We also demonstrate selective binding of chiral organic molecules such as 1-phenylethanol, suggesting applications in enantioselective separation.	Jul 2014

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I11-High Resolution Powder Diffraction
I19-Small Molecule Single Crystal Diffraction

Separation of rare gases and chiral molecules by selective binding in porous organic cages