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 Al 3+ was increased, the fluorescence gradually increased. Other metal ions, such as K +, Ag +, Ca 2+, Mg 2+, Zn 2+, Mn 2+, Co 2+, Ni 2+, Cu 2+, Cd 2+, Cr 3+, Fe 3+, In 3+, had no significant effect on the fluorescence.