Abstract
Acetylene (C2H2) is a commonly utilized raw material in chemical industry, and the separation of C2H2 is of great significance. Metal-organic frameworks (MOFs) have garnered extensive attention in the field of gas adsorption and separation. Herein, we fabricated one new Co-MOF, {[Co4(F-PyIP)4(DMF)2(H2O)4]·2DMF}n (1), through using a F-functionalized ligand 2-fluorine-5-(4-pyridyl)isophthalic acid (H2F-PyIP). The MOF forms a 3,6-connected three-dimensional anatase topological framework and contains the square channels, in which the F functional groups enhance the adsorption for C2H2 over CH4 and CO2, leading to higher isosteric heat of adsorption for C2H2 than CO2 and CH4 as well as significant adsorption selectivity for C2H2/CO2 (2.1) and C2H2/CH4 (15.2) binary mixed gases at 298 K under 100 kPa.
Published Version
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