Abstract
A new 2-fold interpenetrated cadmium metal–organic framework {[Cd2(TPPBDA)(OBA)2]·4DMA·8H2O}n (1) (Cd-MOF) (TPPBDA = N,N,N′,N′-tetrakis(4-(4-pyridine)-phenyl)biphenyl-4,4′-diamine, H2OBA = 4,4′-oxybis(benzoate), and DMA = N,N-dimethylacetamide) was synthesized by a solvothermal reaction. Compound 1 is a 3D net with a meso-helical chain. A noticeable structural feature is that the arrangement of lattice DMA molecules is different in the different meso-helical channels. The material exhibits gas sorption properties for CO2, H2, and CH4. The adsorption selectivity of CO2/CH4 was calculated from the single-component isotherms using the dual-site Langmuir–Freundlich-based ideal adsorbed solution theory. In addition, the luminescent properties of the Cd-MOF in the solid state and in suspension in different organic solvents was investigated.
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