Abstract

Two isostructural lanthanide metal-organic frameworks (LnMOFs), MOF1 and MOF2, were synthesized by solvothermal reaction. The composition and morphology of MOF1 and MOF2 were characterized by FT-IR, EDX, TG, PXRD, et al. The fluorescence spectra show that MOF1 and MOF2 have the significant characteristic emission bands of Eu³⁺ and Tb³⁺ ions, respectively. Based on the characteristic emissions of Eu³⁺ and Tb³⁺ in MOF1 and MOF2, we studied the fluorescence sensing experiments of them to aromatic compounds. The results show that MOF1 and MOF2 both exhibit significant fluorescence quenching effect toward p-nitroaniline, o-nitrophenol and p-nitrophenol with good selectivity and sensitivity. Furthermore, the anti-interference and recyclability were carried out. All the results confirm MOF1 and MOF2 can be used as potential sensing materials for the selective detection of environment pollutants.

摘要

通过溶剂热反应合成了两种同构的镧系金属有机骨架（MOF1和MOF2）。用FT-IR，EDX，TG，PXRD等表征了MOF1和MOF2的组成和形貌。荧光光谱表明，MOF1和MOF2分别具有明显的Eu ³⁺和Tb ³⁺离子特征发射带。基于MOF1和MOF2中Eu ³⁺和Tb ³⁺的特征发射，我们研究了它们对芳族化合物的荧光传感实验。结果表明，MOF1和MOF2均对对硝基苯胺，邻硝基苯酚和对硝基苯酚均具有明显的荧光猝灭作用。-硝基苯酚具有良好的选择性和敏感性。此外，进行了抗干扰和可回收性。所有结果都证明MOF1和MOF2可以用作潜在检测材料，用于选择性检测环境污染物。