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金属-有机框架物在荧光识别领域表现出良好的应用前景,为探究合成更为精确识别的物质,本文利用二羧酸配体(H_2PAIA=5-丙酰胺基间苯二甲酸)和硝酸铜通过溶剂调控合成了两例结构不同的铜基金属-有机框架物(MOFs){[Cu(PAIA)(H_2O)]·2H_2O}(1)和{[Cu_3(PAIA)_2(DMSO)(Pyridine)_(1.5)]}(DMSO:二甲基亚砜;Pyridine:吡啶)(2)。尽管由相同的金属离子和有机配体构筑而成,但显示出具有显著溶剂导向特征的不同框架结构:配合物1为三维NbO型拓扑结构,而配合物2为二维sql型拓扑结构。正是由于这些结构上的差异,导致两个配合物的荧光识别性能和疏水性能展现出显著的不同。配合物1能够同时识别Pb~(2+)和Ag~+离子,而配合物2只能识别Pb~(2+),对Ag~+没有明显的信号响应。配合物1的疏水角85.06°比配合物2的52.71°有显著的增加。
Metal-organic frameworks have shown good prospects in the field of fluorescence recognition. In order to explore the more accurate identification of the synthesized materials, the dicarboxylic acid ligand (H 2 PAIA = 5-propionamido isophthalic acid) and copper nitrate Solvent-mediated synthesis of two Cu-based metal-organic frameworks (MOFs) {{Cu (PAIA) · 2H_2O} (1) and {Cu_3 (PAIA) _2 (DMSO) (1.5)]} (DMSO: dimethylsulfoxide; Pyridine: pyridine) (2). Although constructed from the same metal ions and organic ligands, different framework structures with significant solvent-oriented features are shown: Complex 1 is a three-dimensional NbO type topology and Complex 2 is a two-dimensional sql topology. It is because of these structural differences that the two complexes show significant differences in fluorescence recognition and hydrophobicity. Complex 1 can recognize both Pb 2+ and Ag + ions, while complex 2 can only recognize Pb 2+ without obvious signal response to Ag +. The hydrophobic angle of Complex 1 85.06 ° is significantly higher than that of Complex 2 52.71 °.