Unblocking a rigid purine MOF for kinetic separation of xylenes

Richelle Lyndon; Yuxiang Wang; Ian M. Walton; Yao Ma; Yang Liu; Zhenzi Yu; Guanghui Zhu; Samuel Berens; Yu-Sheng Chen; SuYin G. Wang; Sergey Vasenkov; David S. Sholl; Krista S. Walton; Simon H. Pang; Ryan P. Lively

doi:10.1039/D2CC04387D

Unblocking a rigid purine MOF for kinetic separation of xylenes†

Richelle Lyndon,‡^a Yuxiang Wang,

‡^a Ian M. Walton,^a Yao Ma,^a Yang Liu,^a Zhenzi Yu,^a Guanghui Zhu,

^a Samuel Berens,^b Yu-Sheng Chen,^c SuYin G. Wang,^c Sergey Vasenkov,

^b David S. Sholl,^ad Krista S. Walton,

^a Simon H. Pang

^e and Ryan P. Lively

*^a

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* Corresponding authors

^a School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA 30332, USA
E-mail: ryan.lively@chbe.gatech.edu

^b Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA

^c ChemMatCARS Beamline, The University of Chicago, Advanced Photon Source, Lemont, Illinois 60439, USA

^d Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA

^e Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA

Abstract

The separation of xylene isomers still remains an industrially challenging task. Here, porous purine-based metal–organic frameworks (MOFs) have been synthesized and studied for their potential in xylene separations. In particular, Zn(purine)I showed excellent para-xylene/ortho-xylene separation capability with a diffusion selectivity of 6 and high equilibrium adsorption selectivity as indicated by coadsorption experiments. This high selectivity is attributed to the shape and size of the channel aperture within the rigid framework of Zn(purine)I.

Chemical Communications

Unblocking a rigid purine MOF for kinetic separation of xylenes†

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Unblocking a rigid purine MOF for kinetic separation of xylenes

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