【摘要】 利用溶剂热法合成了两例同构金属-有机框架（MOFs）化合物（FJU-40-H与FJU-40-NH₂）,进行X射线粉末衍射及红外分析,探究了两例MOFs在不同溶剂分子、不同金属盐溶液和不同pH值溶液中的荧光性质.结果表明:羧酸配体上有无—NH₂的存在对MOFs的荧光性能有明显的影响,在水体系中,FJU-40-NH₂的荧光性能大大优于FJU-40-H.实验还发现:尽管Fe³⁺对该同构MOFs的荧光都有明显的淬灭作用,然而,利用FJU-40-NH₂的荧光淬灭效应可实现对Fe³⁺的传感检测,而FJU-40-H则不适宜.同构MOFs配体官能团的不同可导致其荧光性能的差异,这可为高性能传感器的构建提供思路.更多还原

【Abstract】 In this paper,two isomorphic metal-organic frameworks（MOFs） compounds（FJU-40-H and FJU-40-NH₂） were prepared by solvothermal method,and characterized by powder X-ray diffraction and infrared analysis.The fluorescence properties of the two isomorphic MOFs were explored in different solvent molecules,different metal salt solutions and different pH value solutions.The results showed that the presence of —NH₂ on carboxylic acid ligands has a significant effect on the fluorescence properties of MOFs.In water system,the fluorescence properties of FJU-40-NH₂ are much better than that of FJU-40-H.It was also found that Fe³⁺ had obvious quenching effect on the fluorescence of the isomorphic MOFs,and the fluorescence quenching effect of FJU-40-NH₂ could be used to detect Fe³⁺ sensitively,however,FJU-40-H was not suitable for doing it.This work illustrated that different functional groups of isomorphic MOFs ligands can lead to different fluorescence performance,which provided ideas for the construction of high-performance sensors.更多还原