文献名： Aggregation-induced emission enhancement (AIEE)-active tetraphenylethene (TPE)-based chemosensor for CN ⁻

作者 ： Yilan Wang ^a ; Hongliang Liu ^a ; Zhao Chen ^a ; Shouzhi Pu ^ab

^a Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China

^b Department of Ecology and Environment, Yuzhang Normal University, Nanchang 330103, PR China

摘要： An aggregation-induced emission enhancement (AIEE)-active fluorescent sensor has been successfully designed and synthesized, combining the AIE effect of tetraphenylethylene (TPE) with the cyanide acceptor of phenanthro[9,10- d ]imidazole. The sensor exhibits not only the property of AIEE in DCM/ n -hexane or THF/H ₂ O, but also the phenomenon of mechanofluorochromic (MFC). It displays large Stokes shift (107 nm) due to the intramolecular charge transfer (ICT) process. The cation of CN ⁻  boosts the ICT process to make the greater Stokes shift (184 nm) with the fluorescent color vary from blue-green to sodium-yellow and visually turning from light yellow to dark yellow in the naked eyes. The results of Job's plot, ESI-MS and the DFT calculations provide the stoichiometric ratio and electronic properties of the sensor. Furthermore, the sensor could be applied to qualitative and quantitative detection of CN ⁻  on test paper strips.

关键词： Aggregation-induced emission enhancement ; Mechanofluorochromic ; Fluorescent sensor ; Cyanide