title: A chiral mixed metal-organic framework based on a Ni(saldpen) metalloligand: synthesis, characterization and catalytic performances.
abstract: A three-dimensional (3D) chiral mixed metal-organic framework [Cd4Cl(Ni-L)3(Ni-HL)(H2O)6(DMF)]·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 (∼1.1 × 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.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Ren
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Cheng
authors.forename: Shaorong
authors.initials: S
authors.lastname: Yang
authors.forename: Chaorong
authors.initials: C
authors.lastname: Qi
authors.forename: Huanfeng
authors.initials: H
authors.lastname: Jiang
authors.forename: Qiuping
authors.initials: Q
authors.lastname: Mao
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry; D002254:Carbonates / Q000138:chemical synthesis / Q000737:chemistry; D002384:Catalysis; D004852:Epoxy Compounds / Q000737:chemistry; D005029:Ethylenediamines / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: C585683:(R,R)-N,N'-bis-(salicylidine)diphenylethylenediamine; D002254:Carbonates; D004852:Epoxy Compounds; D005029:Ethylenediamines; D008024:Ligands; D009942:Organometallic Compounds; D002245:Carbon Dioxide; D009532:Nickel