Multifunctional Chemosensors for the Simultaneous Detection of Copper and Mercury Ions: Applications in Test Strip Fabrication, Spiking Studies, and Logic Gate Formulation.

ABSTRACT: This study reports the successful synthesis of three new benzidine-based chemosensors (CRBD-1, CRBD-2, and CRBD-3). Among these, CRBD-1 and CRBD-2 exhibited exceptional selectivity and ultrafast response toward Cu²⁺ and Hg²⁺ ions, evident by a distinct naked-eye color change. The sensors demonstrated remarkable stability across a broad pH range and achieved low detection limits in the ppm range. CRBD-1 displayed a high binding constant for Cu²⁺ (2.42 × 10⁸) and Hg²⁺ (1.45 × 10⁷). Notably, the limit of detection (LOD) for Cu²⁺ (0.953 ppm) and Hg²⁺ (0.003 ppm) was significantly lower than the established safety thresholds set by WHO and ESEPA. The mechanism of Cu²⁺ sensing, involving intramolec

SUBMITTER: Dhawale A 

PROVIDER: S-EPMC11904692 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature