A novel highly selective probe with both aggregation-induced emission enhancement and intramolecular charge transfer characteristics for CN^sup -^ detectio

A novel fluorescence chemosensor M1 was designed and synthesized through Knoevenagel condensation reaction between 2-(4-naphthalen-1-yl-phenyl)-2H-[1,2,3]triazole-4-carbaldehyde and malononitrile. UV–vis absorption and fluorescence emission spectroscopy found that M1 possessed intramolecular charge...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2018-03, Vol.257, p.154
Main Authors: Xie, Zhengfeng, Kong, Xiangjuan, Feng, Lei, Ma, Junchi, Li, Yuqin, Wang, Xin, Bao, Wanrui, Shi, Wei, Hui, Yonghai
Format: Article
Language:English
Subjects:
Agglomeration
Anions
Charge transfer
Chemical compounds
Chemical sensors
Chemical synthesis
Chemoreceptors
Cyanides
Emissions
Fluorescence
Malononitrile
Molecules
NMR
Nuclear magnetic resonance
Sensors
Spectrum analysis
Titration
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Summary:A novel fluorescence chemosensor M1 was designed and synthesized through Knoevenagel condensation reaction between 2-(4-naphthalen-1-yl-phenyl)-2H-[1,2,3]triazole-4-carbaldehyde and malononitrile. UV–vis absorption and fluorescence emission spectroscopy found that M1 possessed intramolecular charge transfer (ICT) and aggregation-induced emission enhancement (AIEE) properties. Because M1 contained dicyano-vinyl groups which can easily occurred the nucleophilic Michael addition of cyanide anion. So M1 exhibited remarkable selectivity and sensitivity toward CN− with a low detection limitation of 3.91 × 10−8 M. The mechanism with cyanide anion was systematically studied by 1H NMR titration experiments and HR-MS.
ISSN:0925-4005
1873-3077