Abstract
Metal-organic frameworks (MOFs) show the pre-eminence over other traditional fluorescent probes in the detection of water contaminants. Here, a novel lanthanide metal-organic framework Tb-MOF was successfully constructed by anchoring Tb3+ and 4,4'-(4-amino-1,2,4-triazol-3,5-diyl)dibenzoic acid (H2atdbc) which exhibited high chemical stability and water stability. Furthermore, sensing experiments showed that Tb-MOF could be used as a multifunctional probe to detect Fe3+ (LOD = 5.01 × 10-7 mol L-1, Ksv = 1.28 × 104 L mol-1), Cr2O72− (LOD = 2.92 × 10-6 mol L-1, Ksv = 8454.37 L mol-1) and acetylacetone (LOD = 5.59 × 10-4 mol L-1, Ksv = 12.32 L mol-1) separately. PXRD, ICP-MS, IR and UV–vis spectra were conducted to explore the detection mechanisms. The experiments showed that the detection mechanism for Fe3+ was energy transfer and ion exchange, and the detection mechanisms for Cr2O72− and acetylacetone were energy transfer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have