双配体Zn(Ⅱ)MOFs材料的构筑及光致发光性能

The Construction of Double Ligands Zn(Ⅱ)MOFs and Its Photoluminescence Properties

以2,5-二羟基对苯二甲酸(H 4-DHBDC)和4,4′-联吡啶(4,4′-Dipyridyl)为双配体、Zn(NO 3)2 6H 2O为金属盐,在水/DMF=3∶2(体积比)的溶剂体系中,采用溶剂热法,在120℃时构筑了一种组成为[Zn 2(H 2-DHBDC)(DHBDC)0.5(4,4′-Dipyridyl)1.5]n的Zn(Ⅱ)MOFs材料。利用X-射线单晶衍射(PXRD)、红外光谱(FTIR)、热重分析(TGA)和荧光分光光度法(FS)等,对其晶体结构和性质进行了分析与表征。结果表明,Zn(Ⅱ)MOFs材料属于单斜晶系,P 2(1)/n空间群,且具有三维网状结构。热重分析和荧光分析表明,Zn(Ⅱ)MOFs材料具有良好的热力学稳定性和光致发光性能。

2,5-dihydroxyterephthalic acid(H 4-DHBDC)and 4,4′-bipyridine(4,4′-Dipyridyl)as double ligands,Zn(NO 3)2 6H 2O as a metal salt,the solvothermal method was adopted in a solvent system of water/DMF=3∶2(volume fraction)and a Zn(Ⅱ)MOFs material was constructed by solvothermal method at 120℃.Its composition was[Zn 2(H 2-DHBDC)(DHBDC)0.5(4,4′-Dipyridyl)1.5]n.The crystal structure and properties were analyzed and characterized by X-ray single crystal diffraction(PXRD),infrared spectroscopy(FTIR),thermogravimetric analysis(TGA)and fluorescence spectrophotometry(FS).The results showed that the Zn(Ⅱ)MOFs material belongs to the monoclinic system,P 2(1)/n space group,and has a three-dimensional network structure.The analysis of thermogravimetric and fluorescence show that the Zn(Ⅱ)MOFs material has good thermodynamic stability and photoluminescence property.