A novel rhodamine-based turn-on fluorescent probe for dual detection of Cr3+ and Cu2+ with solvent-dependent binding properties

摘要

A new and simple 8-aminoquinoline-rhodamine conjugate-based fluorescent probe was constructed. This chemosensor displayed simultaneously significant fluorescent enhancement for Cr3+ in CH3CN solution and Cu2+ in ethanol solution with high selectivity and sensitivity. The solvent-dependent binding modes provided facile and efficient dual-analyte fluorescent detection. Besides, the concomitant differentiable calorimetric changes with Cr(3+)and Cu2+ in CH3CN medium contributed easy and sensitive analysis of both cations by absorbance measurements and naked eyes. Finally, the probe was applied to detect Cr3+ and Cu2+ on silica gel plates.