配合物[Cd(1,3-BDC)(L)(H_2O)_2]·H_2O的水热合成、晶体结构和荧光性质

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

利用水热方法制备了一个新的过渡金属镉配合物[Cd(1,3-BDC)(L)(H2O)2]·H2O(1,3-H2BDC=间苯二甲酸,L=2-(3-吡啶基)-1H-苯并咪唑),并通过元素分析、红外光谱和X-射线单晶衍射方法确定了该配合物的晶体结构.结构分析表明该配合物属于单斜晶系,P21/c空间群,晶胞参数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.配合物中CdⅡ离子与L配体的1个吡啶N原子、1,3-BDC的4个氧原子和2个配位水的O原子配位,形成七配位的扭曲十面体结构.配体1,3-BDC的桥连相邻的CdⅡ离子形成一维聚合物链,相邻链间通过氢键和π…π作用形成三维超分子网络,并对该配合物的热稳定性和荧光性质进行了研究.

A new transition metal complex, [Cd（1,3-BDC）（L）（HeO）2]·H2O （L = 2-（3-pyridyl）- 1H-benzoimidazole, 1,3-HeBDC = 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= α=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 1D polymeric chain, then the neighboring chains are extended into a 3D supramolecular network hy the hydrogen bonding and π…π interactions. The thermal stability and fluorescence property of the title complex was also studied.