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Issue 11, 2018
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A flexible metal–organic framework with adaptive pores for high column-capacity gas chromatographic separation

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Abstract

Solvothermal reaction of Zn(NO3)2 and a bifunctional ligand 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H2mpba) using benzene as template gave a two-fold interpenetrated porous framework [Zn2(Hmpba)2(mpba)]·2C6H6 (1·C6H6 or MCF-54), which displayed single-crystal to single-crystal (SCSC) structural transformations upon activation and adsorption of methanol, toluene and cyclohexane. Single-crystal structural analysis and computational simulations demonstrated that compound 1 possesses adaptive pores toward various shapes or arrangements of guests. Using silicone rubber as binder, microcrystalline powders of 1 were coated on the inner surface of a capillary column for gas chromatography, which displayed high separation performances and/or abnormal separation sequences for similar benzene homologues. By virtue of the large loading amount of adsorbent, the column shows extra-large column-capacity, being almost 300 times larger than that of common commercial capillary columns, leading to good selectivities and resolutions even in the presence of large amount of interferents.

Graphical abstract: A flexible metal–organic framework with adaptive pores for high column-capacity gas chromatographic separation

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Publication details

The article was received on 12 Jul 2018, accepted on 26 Aug 2018 and first published on 29 Aug 2018


Article type: Research Article
DOI: 10.1039/C8QI00684A
Inorg. Chem. Front., 2018,5, 2777-2783

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    A flexible metal–organic framework with adaptive pores for high column-capacity gas chromatographic separation

    C. He, Z. Ye, Y. Xu, Y. Xie, X. Lian, J. Zhang and X. Chen, Inorg. Chem. Front., 2018, 5, 2777
    DOI: 10.1039/C8QI00684A

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