Ultra-sensitive ratiometric luminescent sensing of diquat and application in hydrogel anti-counterfeiting of Eu3+/Tb3+-doped Zn-MOF

Key Points

• The ratiometric luminescent sensing enables detection of diquat at low concentrations, enhancing usability in various applications.
• Sensitivity measurements demonstrate detection limits in the nanomolar range for diquat, specifically targeting ≤10 nM concentrations.
• Employing eu3+/tb3+-doped zinc-metal organic frameworks allows for robust hydrogel design with enhanced luminescent properties.
• This novel approach supports anti-counterfeiting measures in commercial products, indicating potential for broader security applications.