Selective fluorescent turn-off sensing of Pd2+ ion: applications as paper strips, polystyrene films, and in cell imaging

Abstract

Pyridine-2,6-dicarboxamide based scaffolds with appended naphthyl groups act as fluorescent probes for the selective detection of Pd²⁺ ions in aqueous medium. Collective studies comprising Job's plots, Benesi–Hildebrand fittings, Stern–Volmer plots and detection limits illustrate the notable sensing abilities of such probes for the Pd²⁺ ion. These probes further demonstrate potential applications as paper-strip sensors, as polystyrene film-based sensors, and in cell imaging.