A new pyrene derivative BF bearing a furan group was synthesized via a one-step reaction as a colorimetric and ratiometric chemosensor for Al~(3+) in ethanol-H_2O(9:1,v/v,pH 7.2,HEPES buffer)solution.This chemosensor could selectively recognize Al~(3+) in the presence of other competing ions.Low limit of detection(LOD) and high association constant revealed its superior sensitivity and binding affinity toward Al~(3+).Besides,the probe BF performed perfectly in a reversibility test using EDTA.The mechanism of the interaction has been confirmed by ~1H NMR titration.Importantly,chemosensor BF has also been utilized to detect Al~(3+) on test paper strips,which showed its potential for practical applications. A new pyrene derivative BF bearing a furan group was synthesized via a one-step reaction as a colorimetric and ratiometric chemosensor for Al ~ (3+) in ethanol-H 2 O (9: 1, v / v, pH 7.2, HEPES buffer) solution . This chemosensor could selectively recognize Al ~ (3+) in the presence of other competing ions. Low limit of detection (LOD) and high association constant revealed its superior sensitivity and binding affinity toward Al ~ (3 +). BF performed perfectly in a reversibility test using EDTA. The mechanism of the interaction has been confirmed by ~ 1H NMR titration. Implantantly, chemosensor BF has also been utilized to detect Al ~ (3+) on test paper strips, which showed its potential for practical applications.