Abstract
Gold (Au) and palladium (Pd) species have been widely used in synthetic chemistry, biology, and environmental sciences, raising hard-to-ignore health and environment risks due to their potential toxicity. Herein, a novel dual-functional fluorescent probe was rationally designed and developed for simultaneous quantification and visualization of Au3+ and Pd species in the environmental and biological systems. Significant fluorescence enhancement at 484 and 606 nm and color changes were observed upon addition of Au3+ and Pd0 with high sensitivity. The detection limit for Au3+ and Pd0 was as low as 68 nM and 7 nM, respectively. Combined with smartphone chromaticity and dual-channel fluorescence imaging analysis, this probe was successfully applied to the quantification and visualization of Au3+ and Pd species in real water samples. Thus, simultaneous naked-eye visualization and quantification of Au3+ and Pd0 in real water samples was achieved using this probe. The probe was also successfully applied to fluorescence imaging of Au3+ and Pd0 in HeLa cells and zebrafish, promoting the monitor and understanding about gold and palladium species in environmental and biological systems.
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