A highly selective turn-on fluorescent and naked-eye colourimetric dual-channel probe for cyanide anions (CNˉ) has been designed and characterized. In the mixed solution (DMSO / H₂O, 9:1, v / v), only CNˉ could cause an increase in the UV absorption intensity and the corresponding fluorescence intensity increased, and other anions had no significant effect on the probe. After treatment with cyanide in the probe solution, the solution showed a noticeable colour change, from light yellow to purple. Moreover, a fluorescence spectrophotometer can be used to observe that the fluorescence intensity of the solution is significantly enhanced. The response of the colourimetric and fluorescent dual-channel probe to CNˉ was attributed to nucleophilic addition, and the mechanism was determined by ¹H NMR spectroscopy. In addition, this probe was used to detect CNˉ in actual water samples, including river water, drinking water, and tap water. The spiked CNˉ recovery rate is very high (97.2%-100.06%), and analytical precision is also very high (RSD < 2%), which shows its feasibility and reliability for detecting cyanide ions in actual water samples.

设计并表征了一种用于氰化物阴离子 (CNˉ) 的高选择性开启荧光和肉眼比色双通道探针。在混合溶液(DMSO/H ₂ O, 9:1, v/v)中，只有CNˉ会引起紫外吸收强度增加，相应荧光强度增加，其他阴离子对探针无明显影响。在探针溶液中用氰化物处理后，溶液显示出明显的颜色变化，从浅黄色变为紫色。此外，可以使用荧光分光光度计观察溶液的荧光强度显着增强。比色荧光双通道探针对CNˉ的响应归因于亲核加成，其机制由¹决定核磁共振谱。此外，该探针还用于检测实际水样中的CNˉ，包括河水、饮用水和自来水。加标CNˉ的回收率非常高（97.2%-100.06%），分析精度也非常高（RSD < 2%），显示了其检测实际水样中氰化物离子的可行性和可靠性。