Porous organic cages

Tozawa, Tomokazu and Jones, James T. A. and Swamy, Shashikala I. and Jiang, Shan and Adams, Dave J. and Shakespeare, Stephen and Clowes, Rob and Bradshaw, Darren and Hasell, Tom and Chong, Samantha Y. and Tang, Chiu and Thompson, Stephen and Parker, Julia and Trewin, Abbie and Bacsa, John and Slawin, Alexandra M. Z. and Steiner, Alexander and Cooper, Andrew I. (2009) Porous organic cages. Nature Materials, 8 (12). pp. 973-978. ISSN 1476-1122

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Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of non-porous sub-units. The three-dimensional connectivity between the cage windows is controlled by varying the chemical functionality such that either non-porous or permanently porous assemblies can be produced. Surface areas and gas uptakes for the latter exceed comparable molecular solids. One of the cages can be converted by recrystallization to produce either porous or non-porous polymorphs with apparent Brunauer-Emmett-Teller surface areas of 550 and 23 m(2) g(-1), respectively. These results suggest design principles for responsive porous organic solids and for the modular construction of extended materials from prefabricated molecular pores.

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Journal Article
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Nature Materials
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12 Aug 2013 10:57
Last Modified:
22 Nov 2022 00:05