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Issue 5, 2019
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Two ultramicroporous metal–organic frameworks assembled from binuclear secondary building units for highly selective CO2/N2 separation

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Abstract

Two novel metal–organic frameworks [Ni22-Cl)(BTBA)2·DMF]·Cl·3DMF (JLU-MOF56, BTBA = 3,5-bis(triazol-1-yl)benzoic acid) and [Co22-Cl)(BTBA)2·DMF]·Cl·3DMF (JLU-MOF57) have been successfully synthesized under solvothermal conditions. Crystallographic analysis indicates that the two compounds with different metal ions are isoreticular and both are constructed from binuclear [M22-Cl)(COO)2N4] (M = Co, Ni) and a 3-connected hetero-N,O donor ligand. The overall framework possesses a (3,6)-connected dag topology. Furthermore, both of them feature ultramicroporous channels of 3.5 Å × 3.4 Å, which are suitable for adsorbing smaller carbon dioxide (CO2) gas molecules but not larger nitrogen (N2) gas molecules. Therefore, JLU-MOF56 and JLU-MOF57 exhibit good performance for CO2/N2 separation, and are promising materials for gas adsorption and purification.

Graphical abstract: Two ultramicroporous metal–organic frameworks assembled from binuclear secondary building units for highly selective CO2/N2 separation

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Publication details

The article was received on 07 Nov 2018, accepted on 12 Dec 2018 and first published on 14 Dec 2018


Article type: Paper
DOI: 10.1039/C8DT04424D
Dalton Trans., 2019,48, 1680-1685

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    Two ultramicroporous metal–organic frameworks assembled from binuclear secondary building units for highly selective CO2/N2 separation

    S. Liu, S. Yao, B. Liu, X. Sun, Y. Yuan, G. Li, L. Zhang and Y. Liu, Dalton Trans., 2019, 48, 1680
    DOI: 10.1039/C8DT04424D

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