A 4-Amino-1,8-Naphthalimide Derivative for Selective Fluorescent Detection of Palladium(II) Ions

Palladium is a member of the platinum group of metals and can be used in the electronics industry for applications such as preparing precision resistors. It is also utilized for catalysis in organic chemistry to achieve faster reaction speeds and lower costs of production in industry. Overexposure to Pd is harmful to the environment and to human health because it can be conveyed quickly to the liver, kidney, spleen, adrenal glands, lungs, and bones. Herein, a fluorescent probe that contains an alkynyl group for specific reaction with PdII ions, and a naphthalimide group as a fluorophore was designed. This probe has high specificity and selectivity for PdII ions relative to many other metal ions. HPLC analysis was carried out to verify the mechanism of the detection. There is a distinct color change during the detection process. The influence of pH values shows that the probe is suitable to detect PdII ions in the range pH 6–9.