A metal-organic framework based on a custom-designed diisophthalate ligand exhibiting excellent hydrostability and highly selective adsorption of C2 H2 and CO2 over CH4

Dalton Transactions : an International Journal of Inorganic Chemistry
Yao WangYabing He

Abstract

The ligand truncation strategy provides facile access to a wide variety of linkers for the construction of MOFs bearing diverse structures and intriguing properties. In this work, we employed this strategy to design and prepare a novel bent diisophthalate ligand, and used it to successfully construct a copper-based MOF ZJNU-51 with the formula of [Cu2L(H2O)2]·5DMF (H4L = 5,5'-(triphenylamine-4,4'-diyl) diisophthalic acid), which was thoroughly characterized by various techniques including FTIR, TGA, PXRD and single-crystal X-ray diffraction. ZJNU-51 is a two-fold interpenetrated network in which the single network consists of dicopper paddlewheel units connected by the organic ligands and contains open channels as well as six distinct types of metal-organic cages. Furthermore, gas adsorption properties with respect to C2H2, CO2, and CH4 were systematically investigated, demonstrating that ZJNU-51 is a highly promising material for C2H2/CH4 and CO2/CH4 separations. Specifically, the IAST adsorption selectivity at 298 K and 1 atm reaches 35.6 and 5.4 for the equimolar C2H2/CH4 and CO2/CH4 gas mixtures, respectively. More significantly, as revealed by PXRD and N2 adsorption measurements, ZJNU-51 exhibits excellent chemical stabili...Continue Reading

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Citations

Jul 10, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Minghui HeYabing He
Sep 22, 2020·Chemical Society Reviews·Xuan ZhangOmar K Farha
Jan 5, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Shuang LiuYunling Liu
May 16, 2020·Chemical Reviews·Xinlei LiuFreek Kapteijn

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