A Highly Selective Fluorescence Sensor based on Quinoline for the Fluorescence Detection of Al3+ in Aqueous

Abstract

Abstract: Specific recognition of ultra-trace levels of ions in semi-water using super-quicker methods is still a challenge for environmental monitoring. The development of ion-selective fluorescence sensors for selective detection of Al3+ is an essential task because of the importance of Al3+ to the human body. A fluorescent chemosensor S based on quinoline as a binding and signaling unit has been designed and synthesized in a one-step procedure. More importantly, when Al3+ ions are added to the sensor S, it showed immediate responses toward Al3+ ions in dimethylformamide (DMF) solution with the strong blue fluorescence quenching. And the S detection limit (LOD) of Al3+ in aqueous media (1.0 M) is 1.75x10-7 M. Furthermore, the proposed mechanism of action for sensor S and metal ions has been learned using some research techniques such as FE-SEM, FT-IR, XRD and XPS. Further, the fluorescence chemical sensor specifically recognizes the metal aluminum ion.