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Solvent-dependent supramolecular self-assembly of boron cage pillared metal–organic frameworks for selective gas separation

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Abstract

A novel family of microporous boron cage pillared supramolecular metal–organic frameworks BSF-n (n = 4–8) were synthesized with the self-assembly behavior controlled by solvents. Their porous structures of formula [CuB12H12(L)2]n (L = 4,4′-azopyridine for BSF-4 and BSF-5; L = 1,2-bis(4-pyridyl)acetylene for BSF-6; L = 1,4-di(pyridine-4-yl)benzene for BSF-7; L = 4,4′-dipyridine for BSF-8) were all characterised by single crystal diffraction analysis. The use of ethylene glycol leads to non-interpenetrated structures while methanol/water solution affords interpenetrated frameworks. Gas adsorption experiments indicated that interpenetrated BSF-4 has the potential for highly selective separation of C2H2/C2H4 and C2H2/CO2 mixtures.

Graphical abstract: Solvent-dependent supramolecular self-assembly of boron cage pillared metal–organic frameworks for selective gas separation

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Article information


Submitted
30 Jan 2020
Accepted
14 Mar 2020
First published
16 Mar 2020

CrystEngComm, 2020, Advance Article
Article type
Paper

Solvent-dependent supramolecular self-assembly of boron cage pillared metal–organic frameworks for selective gas separation

Y. Zhang, L. Wang, J. Hu, S. Duttwyler, X. Cui and H. Xing, CrystEngComm, 2020, Advance Article , DOI: 10.1039/D0CE00142B

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