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A novel quinoline-based Schiff base fluorescent sensor BQPA had been synthesized and characterized by common spectroscopic methods. It showed highly sensitive fluorescent enhancement (300-fold) and ratiometric absorbance for the determination of Al3+ with low detection limits of 31 nM in CH3CH2OH/H2O (1: 9, v/v) solution. The stoichiometry of the BQPA–Al3+ complex was 1:1, determined by Job plots...
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