二维金属有机框架材料的剥层及其在选择性检测叶酸中的应用

Exfoliation of two-dimensional metal-organic frameworks and its application in selective detection of folic acid

与块状金属-有机框架材料(MOFs)相比,MOFs纳米片由于其超薄的厚度、大表面积及更多的活性位点而受到越来越多的关注。在表面活性剂的辅助作用下,通过自下而上的策略获得了超薄的MOF-2纳米片,与块状MOF-2相比,MOF-2纳米片呈现出肉眼可见的蓝色荧光,与此同时,MOF-2纳米片具有高选择性和高灵敏度检测水溶液中叶酸的能力,可作为叶酸的荧光传感器。该项工作通过将MOF-2的形貌从块体调整到2D纳米片,提高了其发光性能,同时也为设计和改进二维层状材料性能提供了新的思路与策略。

Compared with bulk MOFs(Metal-organic frameworks),two-dimensional MOF nanosheets have received growing interests due to their ultrathin thickness and large surface area with countless active sites.Despite the potential of layered materials,there are few researches on two-dimensional nanomaterials at present.Herein,the ultrathin MOF-2 nanosheets were obtained by the bottom-up surfactant assisted strategy,endowing remarkable luminescence property for the first time.MOF-2 nanosheets displayed visible blue fluorescence and served as a promising luminescence sensor to detect folic acid.In short,the luminescence property of MOF-2 was regulated by controlling the morphology from bulk to 2D nanosheet,which provided a new strategy to design and improve other performances of 2D materials.