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Aggregation-induced emission enhancement (AIEE)-active tetraphenylethene (TPE)-based chemosensor for CN.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-09-10 , DOI: 10.1016/j.saa.2020.118928
Yilan Wang 1 , Hongliang Liu 1 , Zhao Chen 1 , Shouzhi Pu 2
Affiliation  

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/H2O, 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.



中文翻译:

CN的基于聚集诱导的发射增强(AIEE)-活性四苯乙烯(TPE)的化学传感器。

结合四苯基乙烯(TPE)的AIE效应和菲咯[9,10- d ]咪唑的氰化物受体,成功设计并合成了一种聚集诱导发射增强(AIEE)活性荧光传感器。该传感器表现出不仅在DCM / AIEE的属性ñ己烷或THF / H 2 O,而且mechanofluorochromic(MFC)的现象。由于分子内电荷转移(ICT)过程,它显示出较大的斯托克斯位移(107 nm)。CN的阳离子-增强ICT过程,使斯托克斯位移(184 nm)更大,荧光颜色从蓝绿色变为钠黄色,肉眼从浅黄色变为深黄色。乔布图,ESI-MS和DFT计算的结果提供了传感器的化学计量比和电子特性。此外,传感器可以被应用到CN的定性和定量检测-对试纸条。

更新日期:2020-09-18
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