| Abstract: Reaction of Cd(NO3)2 and imidazole-4,5-dicarboxylic acid (H3IDC) with 5:2 metal/ligand molar ratio under DMF/HAc solvothermal condition, yielded a new 3D layered-pillared metal-organic framework architecture of [Cd5(IDC)2(HIDC)2(DMF)2]n(1), which was structurally characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. X-ray diffraction crystal structural analysis reveals its crystallizes in orthorhombic, space group Pbca, with a=1.414 30(4) nm, b=1.571 78(4) nm, c=1.608 89(4) nm, V=3.576 51(16) nm3, Z=4, Dc=2.456 g·cm-3, F(000)=2 520, the final R1=0.032 0, wR2=0.074 5 for 2 471 observed reflections with I>2σ(I). In complex 1, each Cd(Ⅱ) ion is six-coordinated with a distorted octahedral coordination geometry, and each μ5-IDC3- acts as a bridge to bond five Cd(Ⅱ) ions, leading to an infinite 2D network of [Cd5( μ5-IDC)2(DMF)2]n4n+, which are further linked through μ4-HIDC2- to generate an infinite 3D layered-pillared framework architecture of [Cd5( μ5-IDC)2( μ4-HIDC)2(DMF)2]n with 1D open channels along the a axis, which are filled with coordinated DMF molecules. Furthermore, its thermal stability and luminescent property at room temperature in the solid state were also investigated. CCDC: 798235. |
