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Porous organic cages

DOI: 10.1038/nmat2545 DOI Help

Authors: Tomakazu Tozawa (University of Liverpool) , James Jones (University of Liverpool) , Shashikala I. Swamy (University of Liverpool) , Shan Jiang (University of Liverpool) , Dave Adams (University of Liverpool) , Stephen Shakespeare (University of Liverpool) , Rob Clowes (University of Liverpool) , Darren Bradshaw (University of Liverpool) , Tom Hasell (University of Liverpool) , Sam Chong (University of Liverpool) , Julia Parker (Diamond Light Source) , Abbie Trewin (University of Liverpool) , John Bacsa (University of Liverpool) , A M Z Slawin (University of Liverpool) , Alexander Steiner (University of Liverpool) , Andrew I. Cooper (University of Liverpool) , Chiu Tang (Diamond Light Source) , Stephen Thompson (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Materials

State: Published (Approved)
Published: October 2009

Abstract: 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 m2 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.

Subject Areas: Chemistry

Instruments: I11-High Resolution Powder Diffraction

Added On: 21/10/2009 08:38

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