【摘要】 以硝酸锌与3,4’-联苯二甲酸（3,4’-H2dpdc）,4,4’-联吡啶（4,4’-bpy）为反应物,以水为溶剂,适当调节pH值,通过水热反应,得到配合物[Zn（3,4’-Hdpdc）₂（4,4’-bpy）]（Zn-MOF）。利用X射线单晶衍射测试分析确定了该配合物是由4,4’-bpy配体桥联Zn（Ⅱ）离子形成的"Z"形链结构,属于单斜晶系,C2/c空间群。在278nm激发下,Zn-MOF的荧光发射光谱在341⁵37nm范围出现宽发射峰,最强发射峰波长406nm,属于配体的π*—π跃迁。研究了该配合物对Tb（Ⅲ）离子发光性能的影响。实验结果表明,Zn-MOF可敏化甲醇和水溶液中的Tb（Ⅲ）离子,使Tb（Ⅲ）离子的特征荧光发射峰增强。在荧光光谱490,545,585和624nm出现强的线状发射峰,对应于Tb（Ⅲ）离子的⁵D₄→⁷F_J（J=6³）跃迁。最强发射峰位于545nm（⁵D₄→⁷F₅）,为绿光。Zn-MOF可用作荧光探针检测甲醇和水溶液中的Tb（Ⅲ）离子。更多还原

【Abstract】 A metal-organic framework[Zn（3,4’-Hdpdc）₂（4,4’-bpy）]（Zn-MOF）has been synthesized by hydrothermal reaction with the Zn（NO3）2·6H₂O,3,4’-biphenyl dicarboxylic acid（3,4’-H2dpdc）and 4,4’-bipyridine（4,4’-bpy）,and its crystal structure was confirmed by X-ray single crystal diffraction.The complex was the monoclinic system,C2/c space group.The complex had a"Z"-shaped chain structure formed by the 4,4’-bpy ligand and Zn（Ⅱ）ion.The Zn-MOF exhibited intense ligandbased blue luminescence with the maximum excitation wavelength of 278 nm,and the emission band was in the range of 341⁵37 nm from theπ*—πtransition of the ligand.The emission maximum was at 406 nm.The luminescence properties of the complex toward Ln（Ⅲ）metal ions in methanol/aqueous solutions were studied.Fluorescence spectrum show the characteristic emission peaked of Tb（Ⅲ）ions at 490,545,585 and 624 nm,which corresponded to ⁵D₄→⁷F_J（J=6³）transitions of Tb（Ⅲ）,the strongest emission peaked at 545 nm（⁵D₄→⁷F₅）,for the green light.The experimental results showed that the ZnMOF can sensitize the Tb（Ⅲ）ion in the methanol solution and in water,and thus the compound can be used as a fluorescent probe to detect Tb（Ⅲ）ions in methanol solutions and in water.更多还原