Solvothermal Synthesis, Structure and Luminescent Property of a Cd(II) Coordination Polymer with Imidazole-4,5-dicarboxylate

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 [Cd-5(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) nm(3), Z=4, D-c=2.456 g.cm(-3), F(000)=2 520, the final R-1=0.032 0, wR(2)=0.074 5 for 2 471 observed reflections with I>2 sigma(I). In complex 1, each Cd(II) ion is six-coordinated with a distorted octahedral coordination geometry, and each mu(5)-IDC3- acts as a bridge to bond five Cd(II) ions, leading to an infinite 2D network of [Cd-5(mu(5)-IDC)(2)(DMF)(2)](n)(4n+), which are further linked through mu(4)-HIDC2- to generate an infinite 3D layered-pillared framework architecture of [Cd-5(mu(5)-IDC)(2) (mu(4)-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.