Hydrothermal synthesis,crystal structure and fluorescence property of complex[Cd(1,3-BDC)(L)(H_2O)_2]·H_2O

A new transition metal complex,[Cd(1,3-BDC)(L)(H2O)2]·H2O(L = 2-(3-pyridyl)-1H-benzoimidazole,1,3-H2 BDC = 1,3-benzenedicarboxylic acid)was prepared by the hydrothermal method,and structurally characterized by element analysis,IR and single-crystal X-ray diffraction.Result reveals that the complex belongs to the monoclinic system with space group P21/c.The cell parameters are:a=1.016 41(6)nm,b=2.088 42(12)nm,c=1.001 38(6)nm,β=106.336 0(10)°,V=2.039 8(2)nm3,Z=4,R1=0.020 7,wR2=0.494.In the complex,CdⅡ ion is seven-coordinated distorted decahedral mode by one pyridyl nitrogen atom of L ligand,four oxygen atoms from two 1,3-BDC ligands,and two oxygen atoms of two coordinated water molecules.The 1,3-BDC bridges the adjacent CdⅡ ions to form a 1Dpolymeric chain,then the neighboring chains are extended into a 3D supramolecular network by the hydrogen bonding andπ…πinteractions.The thermal stability and fluorescence property of the title complex was also studied.