A multi-ion detection Schiff base chemosensor: turn-off and ratiometric fluorescence sensing of Ni2+, Co2+, Cd2+, and Cu2+ions

Key Points

• Turn-off and ratiometric fluorescence sensing effectively detects multiple metal ions.
• Nickel, cobalt, cadmium, and copper ions show distinct fluorescence responses with the chemosensor.
• Analysis involved the interaction of the chemosensor with metal ions in solution to observe fluorescence changes.
• Fluorescence-based chemosensing may enhance environmental monitoring of heavy metal contaminants.