A simple photochromic Schiff base was successfully prepared by the condensation of salicylaldehyde and benzoyl hydrazine. This compound has reversible photochromic properties based on isomerization and ESIPT mechanisms. In organic solvents, after irradiation with 365 nm UV light for 2 min, the absorption peak at 367 nm of the compound showed a significant decrease, while a double absorption peak appeared at 418 nm and 438 nm, accompanied by a significant change of the solution color from colorless to yellow. The compound can also complex with Al³⁺ at the molar ratio of 2:1 in the water solution (acetonitrile/water, v/v, 1:99), resulting in significantly enhanced fluorescence of the compound, so as to achieve fluorescence detection of Al³⁺ in living cells and water samples.

通过水杨醛与苯甲酰肼的缩合反应成功制备了一种简单的光致变色席夫碱。该化合物具有基于异构化和 ESIPT 机制的可逆光致变色特性。在有机溶剂中，用365 nm紫外光照射2 min后，化合物在367 nm处的吸收峰明显降低，而在418 nm和438 nm处出现双吸收峰，同时溶液发生明显变化颜色由无色变为黄色。该化合物还可以在水溶液（乙腈/水，v/v，1:99）中以2:1的摩尔比与Al ³⁺络合，使化合物的荧光显着增强，从而实现荧光检测活细胞和水样中的 Al ³⁺。