Fluorescent chemosensor based-on naphthol-quinoline for selective detection of aluminum ions

In this study, an assay to quantify the presence of aluminum ions with a receptor containing naphthol and quinoline moieties was developed using a turn-on fluorescence enhancement approach. Upon treatment with aluminum ions, the fluorescence of the receptor was enhanced at 510 nm due to the formation of a complex between the ligand and aluminum ions at room temperature. As the concentration of Al³⁺ was increased, the fluorescence gradually increased. Other metal ions, such as K⁺, Ag⁺, Ca ²⁺, Mg²⁺, Zn²⁺, Mn²⁺, Co ²⁺, Ni²⁺, Cu²⁺, Cd²⁺, Cr ³⁺, Fe³⁺, In³⁺, had no significant effect on the fluorescence.