Colorimetric Sensor Recognition of Cu²⁺, Fe²⁺, and Pb²⁺ Ions Using Curcumin-Derived Schiff Base Ligand
This study demonstrates that two curcumin-derived Schiff base ligands, CurAP and CurMP, serve as effective and selective colorimetric chemosensors for the visual detection of Cu²⁺, Fe²⁺, and Pb²⁺ ions in an aqueous-DMF mixture through the formation of 1:1 bidentate complexes, a mechanism further supported by conceptual density functional theory analysis.