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

Abstract 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.