A Novel Cd(Ⅱ)-MOF Constructed from an Organosillicon Tetracarboxylic Acid Ligand

摘要

A silicon-based tetracarboxylate connector has been prepared and employed in the construction of new metal-organic framework (MOF) material.A novel Cd(Ⅱ) coordination compound,namely,[Cd4(H2O)(L)(DMA)2]n (1,H4L =5,5'-(diphenylsilanediyl) diisophthalic acid,DMA =N,N-dimethylacetamide) has been successfully synthesized based on the ligand.X-ray single-crystal structure analysis reveals that polymer 1 crystallizes in monoclinic,space group P (i) with a =10.3335(11),b =14.1557(15),c =22.004(2) (A),α =72.308(2),β =88.105(2),γ=88.363(3)°,V =3064.2(6) (A)3,Cd4Si2C64N2O19H52,Mr =1659,Dc =1.790 g/cm3,μ(MoKα) =1.486 mm-1,F(000) =1630,Z =2,the final R =0.0660 and wR =0.1302 for 12069 observed reflections (I ＞ 2σ(I)).Its structure has been further characterized by elemental analysis,thermogravimetric analyses and IR spectroscopy.Additionally,luminesccnt propcrty of the title compound has been explored,and shows intense photoluminescent property in the solid state at room temperature.