Synthesis,Crystal Structure,and Luminescent Property of a New 3D Cd(II) Coordination Polymer Constructed from Imidazole-4,5-dicarboxylic Acid and 1,4-Bis(imidazol-1-ylmethyl) benzene Ligands

Reaction of H3IDC(H3IDC=imidazole-4,5-dicarboxylic acid),bix(bix=1,4-bis(imidazol-1-ylmethyl)benzene) with CdCl2 under hydrothermal condition,yielded a new 3D cadmium(Ⅱ) coordination polymer [Cd(HIDC)(bix)0.5]n(1),which was structurally characterized by elemental analysis,infrared spectroscopy,thermal gravimetric analysis,and single-crystal X-ray diffraction.X-ray diffraction crystal structural analysis reveals its crystallizes in monoclinic,space group P21/n with a=1.155 30(17) nm,b=1.052 68(16) nm,c=1.198 71(18) nm,β=110.245(2)°,V=1.367 8(4) nm3,Z=4,Dc=1.873 g·cm-3,F(000)=756,the final R1=0.033 6,and wR2=0.091 1 for 2 000 observed reflections with I2σ(I).In 1,each Cd(Ⅱ) ion is six-coordinated with a distorted octahedral coordination geometry,and each μ3-HIDC2 acts as a bridge to bond three Cd(Ⅱ) ions,leading to an infinite 2D brickwall-like network of [Cd(μ3-HIDC)]n,which are further linked through μ2-bix to generate an infinite 3D layered-pillared framework architecture of [Cd(HIDC)(bix)0.5]n.Furthermore,the luminescent property of 1 was also investigated at room temperature in the solid state.CCDC:772779.