Abstract A novel green emissive AIE active probe, a naphthopyran-malononitrile conjugate (NPM), was utilized for selective dual channel (colorimetric and fluorimetric) sensing of CN− ions in DMSO-water (2/3, v/v, pH = 7.4) solution. The nucleophilic addition of CN− ion on the dicyano-vinyl group breaks the π-electron conjugation, thereby restricting intra-molecular charge transfer(ICT) process in the probe NPM and leading to a visual color change and observable spectral changes. NPM shows good selectivity for CN− ions with the LOD of 4.27 × 10−7 M, which renders it a candidate probe for cyanide detection in aqueous environments. For the practical applicability, NPM-coated paper strips were prepared for convenient, on-site detection of cyanide in aqueous medium.

中文翻译：

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具有聚集诱导发射的新型萘并吡喃化学剂量计：选择性双通道检测水介质和试纸中的氰化物离子

摘要 一种新型绿色发射 AIE 活性探针，萘并吡喃-丙二腈偶联物 (NPM)，用于选择性双通道（比色和荧光）检测 DMSO-水（2/3，v/v，pH = 7.4）中的 CN− 离子） 解决方案。CN- 离子在二氰基乙烯基上的亲核加成破坏了 π 电子共轭，从而限制了探针 NPM 中的分子内电荷转移 (ICT) 过程并导致视觉颜色变化和可观察到的光谱变化。NPM 对 CN− 离子显示出良好的选择性，LOD 为 4.27 × 10−7 M，使其成为水环境中氰化物检测的候选探针。为了实际适用性，制备了 NPM 涂层纸条，以便于现场检测水性介质中的氰化物。