A porous Zn-based metal-organic framework with an expanded tricarboxylic acid ligand for effective CO2 capture and CO2/CH4 separation

作者：Gao, Feng-Xian^*; Ye, Ying-Jie; Zhao, Long-Tao; Liu, Dong-Hai; Li, Yue^*

来源：Inorganic Chemistry Communications, 2018, 94: 39-42.

DOI：10.1016/j.inoche.2018.05.031

• Porous framework
• Nanosized ligand
• Low density framework
• Selective CO2 capture

A trigonal nanosized carboxylate ligand, 4, 4',4 ''-(triazine-2,4,6-triyl-tris(benzene-4,1-diy1))tribenzoic acid (H(3)TAPB), has been applied in the construction of a highly porous metal - organic framework (MOF). A solvothermal reaction of H(3)TAPB and a zinc salt in a mixed solvent of DEF/d ioxane/H2O produces the targeted porous MOF [Zn-3(TAPB)(2)(H2O)(2)](DEF)(4)(H2O)(3) (1, DEF = N,N-Dielhylformamide). This MOF contains a linear Zn-3 secondary building unit with two terminal water molecules occupied the axis positions, which is connected by the TAPB(3-) ligands to afford a 3-fold interpenetrated framework with a large calculated void volume (69.7%). The activated MOF shows exceptional porosities and high CO2 uptake capacities as well as good sorption selectivity of CO2/CH4 around room temperature.

• 出版日期2018-8
• 单位河南工程学院