苯并[d]咪唑基Ni(Ⅱ)配合物的合成、晶体结构与荧光性质研究

Synthesis,Crystal Structure and Fluorescent Properties of Ni(Ⅱ)Complex with Benzo[d]Imidazole Ligand

以3-(4-羧苯基)-7-甲基-2-丙基-3H-苯并[d]咪唑-5-羧酸和六水合氯化镍为原料,采用混合溶剂加热回流方法合成出了一例具有三维超分子结构的镍配合物,并通过X射线单晶衍射、元素分析、红外光谱、紫外-可见光光谱和荧光光谱表征方法对其进行了结构解析和性质表征。X-射线单晶衍射结果表明,配合物属于三斜晶系,P 1空间群;其晶胞参数为a=0.7785(16)nm,b=1.1266(2)nm,c=1.1756(2)nm,α=113.63(3)°,β=93.24(3)°,γ=101.00(3)°,V=0.9171(3)nm^(3)。标题配合物为单核配合物,由4个配体阴离子连接中心Ni(II)离子形成了一维环形链,并进一步通过氢键和π-π堆积作用形成了三维超分子结构。荧光光谱分析结果表明配体和标题配合物均具有良好的荧光性质,且配合物的荧光性质优于配体。

A nickel complex with a three-dimensional supramolecular structure was synthesized through mixed solvent refluxing method using 3-(4-carboxyphenyl)-7-methyl-2-propyl-3H-benzo[d]imidazole-5-carboxylic acid and NiCl_(2)·6H_(2)O as raw material.Its structure and property were characterized by X-ray single crystal diffraction,elemental analysis,IR,UV-Vis and fluorescence spectra.Single crystal X-ray diffraction studies reveal that the complex is in the triclinic system,space group of P 1 with a=0.7785(16)nm,b=1.1266(2)nm,c=1.1756(2)nm,α=113.63(3)°,β=93.24(3)°,γ=101.00(3)°,V=0.9171(3)nm^(3).The title complex is a mononuclear complex which consists of four ligand anions that connect the center Ni(II)cation to form a one-dimensional ring chain,and further forms a three-dimensional supramolecular structure through hydrogen bonding andπ-πstacking.Fluorescence spectrum analysis shows that both the ligand and the title complex have good fluorescence properties,and the fluorescence properties of the title complex are better than that of the ligand.