Dual-ligand europium-based metal–organic frameworks and hydrogels for sensitive ratiometric fluorescent detection of tetracyclines in food

Key Points

• To develop a dual-ligand europium-based fluorescent probe for detecting tetracyclines in food.
• Created a europium-based metal–organic framework fluorescent probe (NH 2 -BDC-Eu-DPA)
• Developed a corresponding hydrogel for ratiometric detection
• Conducted visual analysis of tetracyclines in animal-derived foods.
• Successfully demonstrated sensitive detection of tetracyclines
• Fluorescent probe showed ratiometric response to tetracyclines
• Hydrogel facilitated easier visual analysis of results.