Smartphone-integrated multi-emission Eu-MOF hydrogel for visual, discrimination of antibiotics in milk and honey.

Multi-emission fluorescence sensing has long been a prominent research topic, addressing the challenge of distinguishing pollutants analogues. Building on this area of interest, a multi-emitting three ligand-based metal-organic framework (CUST-864: [Eu(phen)(atiip)(HIPA)·H2O]) is synthesized, capable of simultaneously distinguishing six antibiotics can be identified with 100 % accuracy in actual food samples of milk and honey. Furthermore, a convenient hydrogel composite (H-CUST-864) is created for on-site detection of antibiotics. When integrated with a smartphone, this hydrogel material can realize visual detection, enabling semi-quantitative monitoring of antibiotics. This work offers broader application prospects of lanthanide metal-organic frameworks with multi-emission fluorescent properties for visual monitoring.