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

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SO42-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。

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

A novel complex, Mn(C₇H₅N₄)·(SO₄)·2H₂O](1), was synthesized by hydrothermal reaction of organic ligand 2-(1H-1,2,4-triazol-3-yl)pyridine(2-HTP) with MnSO₄·H₂O 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, P2₁/n, a=1.16373(12) nm, b=0.79324(9) nm, c=1.40241(15) nm, V=1.1996(2) nm³, Z=4. Crystal structure analysis indicates that 2-HTPs, as bidentate ligands, coordinate to Mn²⁺ that links to two water molecules and SO42- by bridge connection into one-dimensional chain complex. In addition, there are π-π stacking 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.