1. A chiral mixed metal–organic framework based on a Ni(saldpen) metalloligand: synthesis, characterization and catalytic performances.
- Author
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Ren, Yanwei, Cheng, Xiaofei, Yang, Shaorong, Qi, Chaorong, Jiang, Huanfeng, and Mao, Qiuping
- Subjects
METAL-organic frameworks ,LIGANDS (Chemistry) ,METAL clusters ,RING formation (Chemistry) ,CHEMICAL engineering - Abstract
A three-dimensional (3D) chiral mixed metal–organic framework [Cd
4 Cl(Ni–L)3 (Ni–HL)(H2 O)6 (DMF)]·4DMF (CMOF 1) based on a new enantiopure dicarboxyl-functionalized Ni(saldpen) metalloligand Ni–H2 L and a novel tetranuclear cadmium cluster [Cd4 Cl(CO2 )7 (CO2 H)] 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 (∼1.1 × 0.9 nm2 ) 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. [ABSTRACT FROM AUTHOR]- Published
- 2013
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