Cyanine-based probe-possessing indolium iodide and indole unit were synthesized in two-step with easy available raw material: a potential probe for the cyanide ion detection. The detecting ability of the probe was investigated and confirmed by a visual and instrumental approach. A noticeable color change from orange to colorless obtained only for cyanide ions and other added ions does not impart any changes visually and through UV and Fluorescence technique. To confirm the mechanism of sensing 1H-NMR recorded. From the result, the peak belonging to N-methyl displayed an upfield shift from 4.01 δ ppm to 2.74 δ ppm due to the disappearance of indolium iodide ion and the olefin protons peaks were shifted from 7.19 to 6.17 and 8.70 to 7.20 δ ppm confirms the nucleophilic addition of cyanide ion to the probe. Test kit from filter paper prepared for the real-time monitoring cyanide ion. The prepared strip is effective in detecting cyanide ion with a visual color change.

采用容易获得的原材料，分两步合成了含有碘化吲哚和吲哚单元的花青基探针：一种用于氰化物离子检测的潜在探针。通过视觉和仪器方法研究并确认了探针的检测能力。仅氰化物离子和其他添加离子获得的从橙色到无色的显着颜色变化不会在视觉上以及通过紫外线和荧光技术带来任何变化。确认记录的 1H-NMR 传感机制。从结果来看，由于碘化吲哚离子的消失，属于N-甲基的峰显示出从 4.01 δ ppm 到 2.74 δ ppm 的上场位移，并且烯烃质子峰从 7.19 位移到 6.17，从 8.70 位移到 7.20 δ ppm，证实了氰化物离子与探针的亲核加成。测试套件由滤纸制成，用于实时监测氰化物离子。所制备的试纸条可通过视觉颜色变化有效检测氰化物离子。