3D Metal-organic framework based on cadmium complex of pyrazine-2,3,5,6- tetracarboxylic acid

摘要

The 3D metal-organic framework based on cadmium complex of pyrazine-2,3,5,6-tetracarboxylate (pztc~(4-)), {Cd_2(pztc) (H_2O)_2}_n, has been synthesized by the reaction of H_4pztc and Cd(NO_3)_2?4H_2O under hydrothermal conditions and characterized by elemental analysis, IR, single-crystal X-ray diffraction and fluorescence measurement. This complex belongs to triclinic system, P?1 space group with a = 5.0080(10) ?, b = 6.6578(13) ?, c = 8.5790(17) ?, α = 89.28(3)°, β = 75.76(3)°, γ = 78.80(3)°. All the donor N and O atoms in pztc~(4-) coordinate to Cd(II) ions. As decadentate ligand, each pztc~(4-) links eight Cd(II) atoms, which is a novel coordination mode of pztc~(4-).