2-(1H-1,2,4-三唑-3-基)吡啶Mn^(Ⅱ)配合物的合成、结构及荧光性质

Syntheses,Structure and Photo-Luminescent Properties of Mn^(Ⅱ) Complex with 2-(1H-1,2,4-Triazol-3-yl) pyridine

采用水热合成法,通过配体[2-(1H-1,2,4-三唑-3-基)吡啶](2-HTP)与MnSO4·H2O中的Mn2+离子组装配位,得到一个结构新颖的配合物[Mn(C7H5N4)·(SO4)·2H2O](1),对其进行元素分析、红外光谱、X射线单晶衍射、固体荧光以及热重分析等测试。结构分析表明,配合物1属于单斜晶系P21/n空间群,部分晶胞参数:a=1. 16373(12) nm,b=0. 79324(9) nm,c=1. 40241(15) nm,V=1. 1996(2) nm3,Z=4。在配合物1中,配体2-HTP与Mn2+离子以双齿的方式配位,Mn2+离子还与两个结晶水分子相连并与SO2-4中O原子的桥联作用连接成为一维的链状结构。此外,配体的芳香环之间还存在弱的π-π空间堆积效应,通过对配合物进行固体荧光测试表明其具有良好的蓝光性质,在477 nm处存在较强的荧光发射峰。

A novel complex,[Mn(C 7 H 5 N 4)·(SO 4)·2H 2 O](1),was synthesized by hydrothermal reaction of organic ligand 2-(1 H-1,2,4-triazol-3-yl)pyridine(2-HTP)with MnSO 4·H 2 O in ethanol aqueous solution.The analysis and characterization of complex 1 were obtained via elemental analysis,infrared(IR),X-ray single-crystal diffraction,solid fluorescence analysis,and thermogravimetric analysis(TGA).Crystal data of complex 1 at 297 K are:monoclinic,P2 1/n,a=1.16373(12)nm,b=0.79324(9)nm,c=1.40241(15)nm,V=1.1996(2)nm 3,Z=4.Crystal structure analysis indicates that 2-HTPs,as bidentate ligands,coordinate to Mn 2+that links to two water molecules and SO 2-4 by bridge connection into one-dimensional chain complex.In addition,there areπ-πstacking between the aromatic-ring of 2-HTPs.Solid fluorescence analysis reveals that complex 1 shows blue fluorescence property with a strong emission at 477 nm.