A chiral mixed metal-organic framework based on a Ni(saldpen) metalloligand: synthesis, characterization and catalytic performances

作者：Ren, Yanwei; Cheng, Xiaofei; Yang, Shaorong; Qi, Chaorong; Jiang, Huanfeng^*; Mao, Qiuping

来源：Dalton Transactions, 2013, 42(27): 9930-9937.

DOI：10.1039/c3dt50664a

• Carbon dioxide adsorption
• Catalytic performance
• Heterogeneous catalyst
• IR and UV-Vis spectrum
• Metal organic framework
• Optically Active
• Propylene carbonate
• Single crystal x-ray diffraction

A three-dimensional (3D) chiral mixed metal-organic framework [Cd4Cl(Ni-L)(3)(Ni-HL)(H2O)(6)(DMF)]center dot 4DMF (CMOF 1) based on a new enantiopure dicarboxyl-functionalized Ni(saldpen) metalloligand Ni-H2L and a novel tetranuclear cadmium cluster [Cd4Cl(CO2)(7)(CO2H)] has been synthesized and characterized by elemental analyses, IR and UV-vis spectra, thermogravimetric analysis, nitrogen and carbon dioxide adsorption, powder and single-crystal X-ray diffractions. Each tetranuclear-cadmium cluster in 1 is linked by eight Ni-L ligands, and each Ni-L ligand is linked by two tetranuclear-cadmium clusters to generate a 3D framework with 1D open channels (similar to 1.1 x 0.9 nm(2)) along the b-axis. Based on its good stability, permanent porosity, Lewis acid sites and moderate uptake for CO2, 1 can be used as a self-supported heterogeneous catalyst for the synthesis of optically active propylene carbonate by asymmetric cycloaddition of CO2 with racemic propylene oxide under relatively mild conditions.

• 出版日期2013
• 单位华南理工大学