重金属离子、挥发性有机化合物(VOC)和农药是人们广泛关注的热点问题,它们对人类健康和生态环境造成了严重危害。准确有效地检测这些物质在许多领域都具有重要意义。通过溶剂热法方法合成的三维铕基金属有机框架[Eu(BDC)(NO3)(DMF)2]n (1,BDC = 1,4-苯二甲酸),其具有良好的水稳定性和优异的光致发光性能。荧光研究结果表明:Eu⁃MOF在含有Fe3+离子、丙酮或NIT的溶液中均表现出荧光猝灭现象,具有很好的选择性,其检测限(体积分数和浓度)分别为1.98 μmol·L−1、1.09%、2.47 μmol·L−1。最后通过实验和模拟相结合的方法,揭示了其荧光淬灭的机理。As hot issues of frequent concern, heavy metal ions, volatile organic compounds (VOCs) and pesticides pose serious hazards to human health and the ecological environment. Accurate and effective detection of these substances is of great importance in many fields. A three-dimensional (3D) europium-based metal-organic framework [Eu(BDC)(NO3)(DMF)2]n (1, BDC = 1,4-benzenedicarboxylic acid) has been constructed by solvothermal method, which demonstrates good water stability and excellent photoluminescence properties. The fluorescence study results indicate that it could selectively detect Fe3+ ions, acetone and NIT by fluorescence quenching with the detection limits (volume fraction and concentration) of 1.98 μmol·L−1, 1.09% and 2.47 μmol·L−1, respectively. Finally, the mechanism of its fluorescence quenching was elucidated by a combination of experiments and simulations.
