Highly sensitive and selective fluorescent probe based on Pd-catalyzed reaction for detection of Pd2+
A novel “off-on” fluorescent probe ACBT, using a readily available dye 2-(2’-aminophenyl) benzothiazole as the fluorophore, for determination of Pd2+ was designed and synthesized in this work. Based on the palladium triggered cleavage reaction, the probe ACBT exhibited rapid response speed (<2 min), high selectivity and sensitivity towards Pd2+ in aqueous solution under mild conditions. The detection limit of probe ACBT was towards Pd2+ estimated to be as low as 2.6 nM. Furthermore, fabrication of probe ACBT test strips was achieved for a convenient visual detection of palladium. In addition, it also has been successfully applied to detect Pd2+ in environmental water samples with satisfying results, indicating that this probe ACBT could be a potentially and feasible method to detect Pd2+ in environmental systems.