A simple Al³⁺ receptor, 2-hydroxyquinoline-3-aldehyde-(benzoyl)hydrazone (L), has been synthesized by condensing 2-hydroxyquinoline-3-aldehyde with benzoic hydrazide. L displayed a high selectivity and pronounced fluorescence enhancement for Al³⁺ over other common cations in water. Moreover, based on the Job’s plot, ESI-MS spectrometry, it could be considered that L and Al³⁺ were coordinated with a 1:1 ratio. In addition, the detection limit of L for sensing Al³⁺ was calculated to be 7.21 × 10⁻⁸ M, which was lower than the acceptable limit of Al³⁺ level in drinking water defined by World Health Organization (WHO) (1.85 × 10⁻⁶ M). These results indicated that this chemical sensor L could be used as a serviceable molecular probe for practical applications.

通过将2-羟基喹啉-3-醛与苯甲酰肼缩合，合成了一种简单的Al ³⁺受体2-羟基喹啉-3-醛-（苯甲酰基）hydr（L）。L在水中显示出对Al ³⁺的高选择性和明显的荧光增强。此外，根据乔布斯图，ESI-MS光谱法，可以认为L和Al ^3+的配比为1：1。另外，用于感测Al ³⁺的L的检测极限被计算为7.21×10 ^-8  M，低于Al ³⁺的可接受极限。世界卫生组织（WHO）定义的饮用水中的水含量（1.85×10 ^-6  M）。这些结果表明，该化学传感器L可以用作实际应用中的有用的分子探针。