The sensor with electron donor phenothiazine-2-carbaldehyde and electron acceptor indolium carboxylic acid, is developed with an intramolecular charge transfer transition between them. The synthesized molecule senses cyanide ion in water. The cyanide ion reacts with the molecule via nucleophilic addition in the indolium ring with a noticeable purple to colorless change in the solution observed. Also with the cyanide ion interaction, the sensor exhibits change in UV-visible absorption and fluorescence spectra. While the other ion does not show spectral and visual changes when interacts with the sensor molecule. Also the interference study reveals that the molecule is highly selective towards cyanide ion. Different source of water samples confirms the CN⁻ ion sensing efficiency of the molecule. 1:1 interaction between the molecule PTI and cyanide ion is confirmed from the results of Jobs plot, ¹H NMR and HRMS. Paper strips were prepared and this can act as a simple tool to sense cyanide ion in various water samples.

该传感器采用电子供体吩噻嗪-2-甲醛和电子受体吲哚羧酸，通过它们之间的分子内电荷转移转变而开发。合成的分子感知水中的氰化物离子。氰化物离子通过吲哚环中的亲核加成与分子反应，在溶液中观察到明显的紫色到无色的变化。此外，随着氰化物离子的相互作用，传感器表现出紫外-可见吸收和荧光光谱的变化。而另一种离子在与传感器分子相互作用时不会表现出光谱和视觉变化。干扰研究还表明该分子对氰化物离子具有高度选择性。不同来源的水样证实了分子的CN-^离子传感效率。从乔布斯图、¹ H NMR 和 HRMS的结果证实了分子PTI和氰化物离子之间的 1:1 相互作用。准备了纸条，这可以作为检测各种水样中氰化物离子的简单工具。