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Issue 20, 2019
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Two copper-based MOFs constructed from a linear diisophthalate linker: supramolecular isomerism and gas adsorption properties

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Abstract

Combining a linear diisophthalate ligand, 5,5′-(2,3-dimethylbenzene-1,4-diyl)diisophthalic acid, with CuCl2·2H2O under different solvothermal conditions afforded two distinct copper-based metal–organic frameworks (ZJNU-96 and ZJNU-97), which were structurally characterized by various techniques. Single-crystal X-ray diffraction analyses reveal that they contain the same inorganic and organic building units but exhibit different topological structures, thus belonging to supramolecular isomers. Furthermore, gas adsorption studies show that ZJNU-96 not only exhibits better stability against desolvation than ZJNU-97 but also displays promising potential for selective adsorptive separation of C2H2 and CO2 from CH4, with C2H2 (CO2) uptake of 183.6 (88.7) cm3 (STP) g−1 and C2H2 (CO2)/CH4 (v/v, 50/50) IAST adsorption selectivity of 26.6 (5.2) at 298 K and 1 atm.

Graphical abstract: Two copper-based MOFs constructed from a linear diisophthalate linker: supramolecular isomerism and gas adsorption properties

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Publication details

The article was received on 11 Mar 2019, accepted on 25 Apr 2019 and first published on 26 Apr 2019


Article type: Paper
DOI: 10.1039/C9CE00359B
CrystEngComm, 2019,21, 3192-3198

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    Two copper-based MOFs constructed from a linear diisophthalate linker: supramolecular isomerism and gas adsorption properties

    M. He, T. Xu, Z. Jiang, X. Yu, Y. Zou, L. Yang, X. Wang, X. Wang and Y. He, CrystEngComm, 2019, 21, 3192
    DOI: 10.1039/C9CE00359B

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