Turn-on fluorescence detection of specific inorganic anions by Zr(IV)-MOF with amino-functional group

Multifunctional Luminescent 3D Ln-MOFs with High Sensitivity for Trace Detection of Micronutrients

“…1,2 The simultaneous luminescence of lanthanide ions (Ln 3+ ) and ligands produces double fluorescence emission, which reduces the interference of external conditions on detection, thus improving the detection sensitivity and reducing the detection limit, which makes the fluorescence MOFs get great development. 3−5 The 4f orbitals of Ln 3+ fill gradually from 4f 0 to 4f, 14 and these electron energy levels give Ln 3+ excellent optical properties. However, the direct luminescence efficiency of Ln 3+ is very low, and the antenna effect can significantly enhance the luminescence of Ln 3+ .…”

“…The 4f orbitals of Ln 3+ fill gradually from 4f 0 to 4f, and these electron energy levels give Ln 3+ excellent optical properties. However, the direct luminescence efficiency of Ln 3+ is very low, and the antenna effect can significantly enhance the luminescence of Ln 3+ . , In other words, Ln 3+ is coupled with ligand, and the ligand that are organic in nature serves as an “antenna” to trap photons.…”

“…However, the fluorescence detection of Ln-MOFs materials is still in the preliminary stage. So far, a variety of Ln-MOFs have been developed, and their unique antenna effects, high quantum efficiency, fluorescence monochromator, narrow emission bands, sharp characteristic emission peaks, long excited state lifetimes (>Ms) and significant Stokes shifts (>200 nm) have attracted extensive attention from researchers. − They have successfully applied Ln-MOFs to many fields, such as heterogeneous catalysis, gas storage/separation, proton conduction, light-emitting devices, and more. − However, in various applications, fluorescence detection based on chemical sensing is the best choice for rapid identification and detection of ions, small molecules and vapors. , In comparison with conventional detection strategies, fluorescence detection displays many merits, e.g., high sensitivity, nondestructive, good selectivity, and practicability …”

Dual-response fluorescence sensing of H2PO4− and CO32− using AJP filter paper based on a pH-stable CdII-based luminescent metal–organic framework

“…1–4 Among them, anions are widely used in biology, medicine, agriculture and industry, and once they flow into water resources and soil, they will cause irreversible damage to the environment. 5–12 Nutrient enrichment caused by the overuse of inorganic phosphates in agriculture leads to excessive algal growth thus causing serious environmental problems. 4,13 In addition, phosphate plays an important role in the vital system as one of the essential nutrients, and its low level can cause hypophosphatemia.…”