喹啉-8-甲醛乙酰腙锌/镉配合物的晶体结构及荧光性质（英文）

Crystal Structures and Fluorescence Property of Zn(Ⅱ)/Cd(Ⅱ) Complexes Based on N-((quinolin-8-yl)methylene)acetohydrazide

合成并通过单晶X射线衍射、元素分析及红外光谱表征了配合物{[Zn(HL)(H_2O)(SO_4)]·H_2O}n(1),[Cd(HL)Cl_2](2)和[Cd(HL)I2](3)的结构(HL为喹啉-8-甲醛乙酰腙)。单晶衍射结果表明,配合物1中,中心Zn髤离子的配位构型为扭曲的八面体,与来自1个中性三齿配体HL的ONN原子供体,1个水分子和2个μ2桥联的硫酸根配位,从而形成沿b轴方向的一维链。配合物2和3中Cd髤与1个中性三齿配体HL和2个卤素阴离子(2中为氯离子,3中为碘离子)配位,配位构型为扭曲的四方锥。乙腈溶液中,配合物3与配体HL几乎无荧光发射,而配合物1和2分别在428和408 nm处有强荧光。

Three complexes, namely {[Zn（HL）（H2O）（SO4）]·H2O}n （1）,[Cd（HL）Cl2] （2） and[Cd（HL）I2] （3） （HL=N-（（quinolin-8-yl）methylene）acetohydrazide） have been synthesized and characterized by single crystal X-ray diffraction, elemental analysis and IR spectroscopy. X-ray diffraction analysis results show that in complex 1, the Zn（Ⅱ） ion with a distorted octahedron coordination geometry is six-coordinated, involving one coordinated water molecule, one ONN donor set of an neutral ligand HL, and two O atoms from two independent μ2-bridged sulfate anions, thus forming one dimension chain-like framework along b axis. However, the coordination geometry of the Cd（Ⅱ） ion in each of complexes 2 and 3 is a distorted square planar geometry with a tridentate acylhydrazone ligand and two halide anions （chloride for 2, while iodide for 3）. In CH3CN solution, the ligand HL and complex 3 exhibit almost none fluorescence emission, whilst complexes 1 and 2 show remarkable peaks at about 428 and 408 nm, respectively.