一种联吡啶二甲酸镍配合物的合成、表征及荧光性能

Synthesis, Characterizatin and Fluorescence Property of Bipyridine Dicarboxylate Ni(Ⅱ) Complex

以2,2′-联吡啶-6,6′-二甲酸(6,6′-H2bpdc)和硫酸镍为原料,用水热法合成了配合物[Ni(6,6′-bpdc)(H2O)2],通过元素分析、X射线(粉末与单晶)衍射、红外光谱、热分析和荧光光谱对[Ni(6,6′-bpdc)(H2O)2]进行了表征,并对X射线粉末衍射数据进行了计算。配合物[Ni(6,6′-bpdc)(H2O)2]的晶体结构属于三斜晶系,■空间群,晶胞参数为a=0.716 72(5)nm、b=0.802 52(5)nm、c=1.094 98(7)nm、α=92.214(2)°、β=96.290(2)°、γ=92.010(2)°,中心Ni^(2+)与配体6,6′-H2bpdc中的N、O原子及两个配位水中的O原子配位,形成配位数为6的扭曲八面体构型。荧光性能研究表明6,6′-H2bpdc配体与Ni^(2+)形成配合物[Ni(6,6′-bpdc)-(H_(2)O)_(2)]后产生了荧光猝灭现象。

Complex[Ni(6,6′-bpdc)(H_(2)O)_(2)]was synthesized with 2,2′-bipyridine-6,6′-dicarboxylic acid(6,6′-H2bpdc)and nickel sulfate hexahydrate as raw materials via hydrothermal method.The complex was characterized by elemental analyses,X-ray diffraction,infrared spectroscopy,thermogravimetric analysis and fluorescence,and X-ray powder diffraction data were indexed.The crystal structure of complex belongs to triclinic system with P1 space group.The lattice parameters are a=0.71672(5)nm,b=0.80252(5)nm,c=1.09498(7)nm,α=92.214(2)°,β=96.290(2)°andγ=92.010(2)°.The nickel ion is coordinated by oxygen and nitrogen atoms in the ligand and oxygen atoms in two coordinated water molecules to form the warped octahedral complex with a coordination number of 6.Fluorescence measurements showed that the ligand was coordinated with nickel ion to form the complex,resulting in fluorescence quenching.