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以水杨醛双缩乙二胺为前驱体,利用简便的液相反应合成了五配位的、具有变形四方锥形结构的Schiff碱双核铜配合物,并通过元素分析、FT-IR、X-射线单晶衍射对其进行结构表征。结果表明,配合物(C16H14Cu N2O2)属于单斜晶系C2/c,a=26.636(5)A,b=6.987 0(14)A,c=14.736(3)A,Z=8,V=2 719.1(9)3,Mr=329.83,F(000)=1 352,R=0.056 0,wR=0.126 3。结构分析表明,该配合物是由两个基本单元C16H14Cu N2O2所组成,每个基本单元由1个Cu(Ⅱ)离子和1个水杨醛双缩乙二胺分子组成。配合物分子之间通过分子间C—H…O氢键的弱相互作用沿晶体学c轴方向组装形成二维网络结构。探究了配合物的荧光和磁性。结果表明,标题配合物相对于自由配体发生了完全的荧光淬灭现象,在10~300 K,配合物具有顺磁性。
Schiff base binuclear copper complex with pentacoordinated, tetragonal pyramidal structure was synthesized by salicylaldehyde ethylenediamine as precursor. The complex was characterized by elemental analysis, FT-IR, X-ray Single crystal diffraction characterization of its structure. The results show that the complex (C16H14Cu N2O2) belongs to the monoclinic system C2 / c with a = 26.636 (5) A, b = 6.987 0 (14) A, c = 14.736 (3) A, Z = 8 and V = 2 719.1 (9) 3, Mr = 329.83, F (000) = 1 352, R = 0.056 0, wR = 0.126 3. Structural analysis shows that the complex is composed of two basic units C16H14Cu N2O2, each basic unit consists of one Cu (Ⅱ) ion and one salicylaldehyde ethylenediamine molecule. The weak interaction between the complex molecules through the intermolecular C-H ... O hydrogen bonding forms a two-dimensional network structure along the crystallographic c-axis direction. The fluorescence and magnetic properties of the complex were investigated. The results show that the title complex undergoes complete fluorescence quenching compared with the free ligand. At 10 ~ 300 K, the complex has paramagnetic properties.