为了探讨3-羧基-1,2,4-三氮唑(MTC)配合物的性质.本文采用水热法合成了一个结构新颖的配合物[Mn(C3H2 N3O2)2(H2O)2].通过红外光谱(IR)、元素分析、热重分析(TGA)和粉末X射线衍射(PXRD)等技术手段表征了配合物的结构和性能.X射线单晶衍射分析表明,配合物为一单核结构,属于单斜晶系P21/c空间群.MnⅡ离子采取六配位,每个Mn离子位于反演中心,分别与两个MTC配体中的1个O和1个N原子螯合配位,同时还与2个水分子配位,形成一个稍微变形八面体构型结构.同时,在配合物中存在着丰富的氢键和弱的πr-πr作用力,通过分子间氢键和弱π-π相互作用形成一个三维网络结构.固体荧光研究表明,配合物的发射峰为517 nm,较配体发生7 nm蓝移.该研究对新型金属有机配合物荧光材料的开发具有一定的指导和借鉴意义.
In order to investigate the properties of 3-carboxyl-1,2,4-triazole complexes,a novel complex,[Mn(C3H2N3O2)2 (H2O) 2],was synthesized by the hydrothermal method.The properties of the complex were characterized by Fourier transform infrared spectroscopy (IR),element analysis,thermal gravimetric anlysis(TGA) and powder X-ray diffraction (PXRD).The single crystal X-ray analysis reveals that the complex is a unique single-core structure and belongs to the monoclinic crystal system in space group P21/c.The coordination number of Mn Ⅱ is six.The Mn Ⅱ atom is located on an inversion centre.Each Mn Ⅱ atom is coordinated by two O atoms and two N atoms from two 3-carboxyl-1,2,4-triazole anions and two coordinated water molecules to form a slightly distorted octahedral geometry.The discrete molecules of the complex are furthermore linked,resulting in a three-dimensional network structure through extensive intermolecular hydrogen bonds and πr-tr interactions.Solid fluorescence of the complex shows an emission peak at 517 nm.Compared with the ligand,there is a 7 nm blue shift.The research provides a reference for exploiting new metal-organic complex fluorescent materials.
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