Research progress of fluorescent-substance@MOFs

Schematic diagram of fluorescence sensors constructed by MOFs doped with different guest substance. [Display omitted] •Fluorescent-substance@MOFs can improve the fluorescence sensing performance of dye on the original performance of dye, so it is necessary to summarize them.•According to different types of fluorescent substance, the design strategy and action mechanism of fluorescent-substance@MOFs are summarized.•The fluorescent-substance@MOFs sensor in the past five years is summarized, and the future research prospects and possible challenges in this field are discussed. Metal-organic frameworks (MOFs) are porous crystal materials formed by the self-assembly of metal ions and organic ligands. MOFs have great application potential in many fields because of their adjustable pore structures, large specific surface area, and good stability. The introduction of fluorescent substances into the metal centers, organic ligands, or voids of MOFs can make them have the function of fluorescence sensing. Fluorescent-substance@MOFs offer a wide variety of advantages that are unmatched by other fluorescent probes, such as high stability, pre-enrichment, and ratiometric luminescence. Here, we introduce the research progress of fluorescent-substance@MOFs prepared from guest substances such as molecular dyes, quantum dots, nanoclusters, and lanthanide metals. And put forward the challenges and future development directions in this field.