Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jun 16;302:123013. doi: 10.1016/j.saa.2023.123013. Online ahead of print.

ABSTRACT

Developing highly sensitive fluorescent probe for Al³⁺ and H₂O detection is highly desirable, due to aluminum toxicity poses a significant threat to public health. On the other hand, the determination of water content holds immense significance in a wide range of fields such as food processing, pharmaceutical manufacturing. In this paper, a novel acylhydrazone-based fluorescent probe P was successfully synthesized and characterized for the sequential detection of Al³⁺ and water in alcohols. The probe P exhibited a remarkable “turn-on” response towards Al³⁺ by emitting yellow fluorescence at 567 nm, with high selectivity and large Stokes shift (147 nm). Meanwhile, the in situ formed P-Al³⁺ complex demonstrated significant solvatofluorochromic characteristic, which could be utilized as a second probe for detecting water via fluorescence quenching with low detection limit in alcohols (0.008%, methanol; 0.013%, ethanol; 0.013%, isopropanol; 0.037%, n-butanol; vol.%) and acetonitrile (0.072%, vol.%). Moreover, the P-Al³⁺ complex was able to detect the alcoholic strength of Chinese Baijiu without the interference of other alcohols, providing an excellent recovery rate (100.0-107.0%). Different Chinese Baijius, with various alcoholic strength, could be distinguished by simple test strips. Furthermore, the P-Al³⁺ complex could also analyze the water content in organic solvents .

PMID:37348274 | DOI:10.1016/j.saa.2023.123013