Synthesis and Identification of Yttrium and Aluminum Ions Using Fluorescent Probes with Four Teeth Bis-beta-diketone Ligands

Résumé fourni par la source

The most distinctive feature of rare-earth β-diketone fluorescent probes lies in the relatively high absorption coefficient and efficient energy transfer of the ligands to ions like Eu3+ and Tb3+. However, there are few reports on using bis-β-diketone ligands themselves as fluorescent probes. A new fluorescent probe, bis-β-diketone ligand fluorescent probe-1,1-thiophen-2,5-bis (9-anthracenyl)-1,3-propanedione (E), was designed and synthesized by using anthracene as fluorophore and dimethyl 2,5-thienediarboxylate as raw material through Claisen ester condensation reaction. The structure of the probe was confirmed by IR,1HNMR, and XPS. The recognition properties of bis-β-diketone E for rare earth and metal ions were systematically studied. The results revealed that bis-β-diketone E has significant fluorescence quenching effects on Y3+ and Al3+, with detection limits of 2.29×10-6 mol/L and 5.5×10-7 mol/L, respectively. The ability of bis-β-diketone E to identify Al3+ in water samples and expanding agents as a fluorescent probe was also investigated, providing a new approach for food detection.

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