混合配体构筑的水相高稳定Zn(Ⅱ)金属有机框架铁离子荧光探针

Construction of water stable Zn(Ⅱ)metal-organic framework iron ion fluorescence probe with mixed ligand

在溶剂热条件下,用咪唑衍生物4,4’-双(2-甲基-1H-咪唑-1-基)-1,1’-联苯(4,4’-BMIB)和2,5-二甲氧基对苯二甲酸(H2DTA)作为混合配体与Zn(Ⅱ)构建出具有荧光性质的金属有机框架,即[Zn(DTA)(4,4’-BMIB)]n(MOF 1)。通过X射线单晶衍射、X射线粉末衍射、红外光谱和热重分析对其进行表征,结果表明MOF 1是一个拓扑符号为(6~3·10~3)的四连接框架结构。此外,MOF 1具有良好的荧光性,能够对水溶液中的铁离子实现高灵敏及高选择的荧光猝灭检测。

Under solvothermal conditions,an imidazole derivative 4,4′-bis(2-methyl-1H-imidazol-1-yl)-1,1′-biphenyl(4,4′-BMIB),2,5-dimethoxyterephthalic acid(H2DTA)and Zn(Ⅱ)ion were used to construct a metal-organic framework(MOF)with fluorescent properties,namely[Zn(DTA)(4,4′-BMIB)]n(MOF 1). It was characterized by X-Ray single crystal diffraction,X-Ray powder diffraction,infrared spectroscopy and thermogravimetric analysis. The results showed that MOF 1 was a four connected frame structure with topological symbol(6~3·10~3). In addition,MOF 1 has good fluorescence and can realize highly sensitive and selective fluorescence quenching detection of iron ions in aqueous solution.