A novel polyhedron-based metal-organic framework with high performance for gas uptake and light hydrocarbon separation

作者：Sun, Qiushi; Yao, Shuo; Liu, Bing; Liu, Xinyao; Li, Guanghua; Liu, Xiaoyang; Liu, Yunling^*

来源：Dalton Transactions, 2018, 47(14): 5005-5010.

DOI：10.1039/c7dt04622g

• PORE-SIZE
• ADSORPTION
• CO2
• SELECTIVITY
• DESIGN
• ENHANCEMENT
• CAPACITY
• KINETICS
• CRYSTAL
• STORAGE

A novel polyhedron-based metal-organic framework [(CH3)(2)NH2](2)[Zn-3(TADIPA)(2)(DMF)(2)]4DMF (JLU-Liu40), which possesses three types of cages with different shapes and sizes, has been successfully synthesized. The framework of JLU-Liu40 is constructed by two inorganic secondary building units (SBUs) of 4-connected square binuclear Zn-paddlewheel and 4-connected tetrahedron mononuclear Zn unit and one organic SBU, which has abundant Lewis basic sites (LBSs), and the framework can be simplified as a pair of 3-connected triangle geometries. Moreover, JLU-Liu40 shows a new (3, 4, 4)-connected topology with the Schlafli symbol {7(2), 9}(2){7(4), 8(2)}. With the benefit of its high density of open metal sites (OMSs) and LBSs, JLU-Liu40 shows good adsorption ability for some small gases such as N-2, CO2, CH4, C2H6 and C3H8. In addition, the theoretical ideal adsorbed solution theory (IAST) calculation indicates that JLU-Liu40 should be a promising material for light gas separation.

• 出版日期2018-4-14
• 单位吉林大学; 无机合成与制备化学国家重点实验室; 中国海洋大学