Synthesis and Application of a Highly Sensitive and High Selective Aluminum Ion Ratio Probe

In this paper, we constructed a kind of fluorescent probe based on 3-(benzo[d]thiazol-2-yl)-2-hydroxy-5-methylbenzaldehyde for the detection of aluminum ions. The fluorescent probe has high sensitivity and selective detection to aluminum ions, and can display the dual response of color and strong fluorescence change. Research results show that the probe showed very good fluorescence enhancement effect to aluminum ion. Other metal ions in the process of test do not have noticeable interference to the test results. The ratio of fluorescence intensity (I₄₉₀/I₅₆₇) with aluminum ion concentration (0-20 μmol/L) shows a good linear relationship between the probe and aluminum. The detection limit is as low as 0.5 μmol/L. Due to its high sensitivity and selectivity, the probe can be used for detection of aluminum ion content in the polluted river.