【摘要】 以金属离子Zn(II)为金属源，对苯二乙酸（ppda）和均苯三咪唑（t ib）作为有机配体，通过水热法合成了配位聚合物[Zn3(Cl)4(ppda)(t i b)2]·H2O。在配位聚合物晶体结构中，Zn1和Zn2离子的配位数都是4,Zn3离子的配位数是5，分别形成变形四面体和六面体。每个均苯三咪唑配体连接3个Zn(II)离子形成一维无限带状链，同时对苯二乙酸反式桥链将一维带状链支撑形成一维孔洞结构，电负性较大的卤素氯离子与苯环氢、结晶水分子氢容易形成氢键，使得一维孔洞互相穿插，构成复杂的三维超分子结构。该配位聚合物在水中稳定性良好，有良好的荧光传感性能，可作为荧光传感器高效灵敏地检测水体系中的四环素(TEC)，检出限为0.45μmol，荧光猝灭率为72.89%。荧光猝灭机理为光诱导电子转移和内滤效应协同作用。更多还原

【Abstract】 The coordination polymer [Zn3(Cl)4(ppda)(tib)2]·H2O is synthesized by hydrothermal method using metal ion Zn(II) as metal source and phenylenediacetic acid(ppda) and homo-phenyl tri-imidazole(tib) as organic ligands. In the crystal structure of coordination polymer, the coordina-tion number of Zn1and Zn2ion is 4, and the coordination number of Zn3ion is 5, forming deformed tetrahedron and hexahedron respectively. Each tib ligand connects three zinc(II) ions to form a one-dimensional infinite strip chain. At the same time, the trans-bridge chain of ppda supports the onedimensional strip chain to form a one-dimensional hole structure. The highly electronegative halogen chloride ions easily form hydrogen bonds with benzene ring hydrogen and water molecular hydrogen, which makes the one-dimensional holes interpenetrate with each other to form a three-dimen-sional supramolecular structure. This coordination polymer has good stability in water, and has good fluorescence sensing properties. For example, it can be used as a fluorescence sensor to detect tetracycline(TEC) in water with a detection limit of 0.45 μmol and a fluorescence quenching rate of72.89%. The fluorescence quenching mechanism is the synergistic effect of photoinduced electron transfer and internal filtration effect.更多还原