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An easily prepared benzothiazole-based probe (BHM) was prepared and characterized by general spectra, including 1 H NMR, 13 C NMR, HRMS, and single-crystal X-ray diffraction. Based on the synergistic mechanism of the inhabitation of intramolecular charge transfer (ICT), the BHM displayed high selectivity and sensitivity for Al 3+ in DMF/H 2 O ( v/v , 1/1) through an obvious blue-shift in the fluorescent spectrum and significant color change detected by the naked eye, respectively. The binding ratio of BHM with Al 3+ was 1:1, as determined by the Job plot, and the binding details were investigated using FT-IR, 1 H NMR titration, and ESI-MS analysis. Furthermore, the BHM was successfully applied in the detection of Al 3+ in the Songhua River and on a test stripe. Fluorescence imaging experiments confirmed that the BHM could be used to monitor Al 3+ in human stromal cells (HSC).

A Benzothiazole-Based Fluorescent Probe for Ratiometric Detection of Al3+ and Its Application in Water Samples and Cell Imaging