Abstract
Aluminum(Al)is widely used in food industry,but excessive absorption of Al~(3+)causes many serious health problems.Therefore,it is of great significance to determine the specificity of Al~(3+).In this study,we designed and synthesized a water-soluble perylene diimide derivative(PDI-Phe)for monitoring Al~(3+)rapidly and visually.Through absorption and emission spectroscopy techniques,we systematically explored the properties and mechanism of the sensor to Al~(3+).The limit of detection(LOD)of Al~(3+)was as low as 6.54 nM.And with the existence of Al~(3+),electrostatic interaction and intermolecular π-π stacking promoted the aggregation and fluorescence quenching of PDI-Phe.Even in the presence of other analytes,PDI-Phe still had excellent selectivity and sensitivity for Al~(3+)detection.Besides,it also had the characteristics of low cost,good water solubility,excellent chemical and optical stability,and easy synthesis.Finally,this method can be further applied to tap water samples.
NSTL