Porous Europium Metal-Organic Frameworks as Highly Sensitive Bi-Functional Sensor for Isoprocarb and Levofloxacin

The development of highly sensitive fluorescence sensing materials has attracted much attention in recent years. In this study, a new two-dimensional porous europium metal-organic frameworks (EuMOFs) have been obtained. Studies have shown that EuMOFs is a stable, fast response, and highly sensitive fluorescence sensor for isoprocarb and levofloxacin (Lvx), which are closely related to food safety and human health. The limits of detection (LOD) for isoprocarb and Lvx are as low as 1.0 and 0.5 nM, respectively, which were much lower than the national standards (GB 28260-2011 for isoprocarb is 2.583 μM). EuMOFs can also achieve strong anti-interference detection of isoprocarb in apple peel and rice extract solution, and Lvx in real urine, with excellent detection stability in 0.01~9.0 nM. The recovery rates for isoprocarb and Lvx in real samples are in 99.12%~101.25%.