Europium Activated Aluminum Organic Frameworks for Highly Selective and Sensitive Detection of Fe3+ and Cr(Ⅵ) in Aqueous Solution

The aluminum based MOFs compound, MIL-96(Al), has been studied as a luminescence sensor by incorporating of Euions, which renders the compound strong red-light emission. The as-synthesized MIL-96(Al):Eunanocrystals exhibit water dispersibility and environmental stability, which are general requirement for an ideal sensing material. The MIL-96(Al):Eunanocrystals show excellent selective detection ability on Feions in aqueous solution with value of low detection limit 20 μM. Meanwhile, it also exhibits excellent selective detection ability on CrOand CrOin aqueous solution with value of low detection limit 10 and 22 μM, respectively. The results of this study show that MIL-96(Al):Eunanocrystals could be used as a multi-responsive luminescent senor for Feand Cr(Ⅵ) species in aqueous solution. The possible luminescence quenching mechanism has also been discussed.