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- W2605588219 abstract "Two new benzoyl coumarin amide derivatives with ortho hydroxyl benzoyl as terminal group have been synthesized. Their photophysical properties and recognition properties for cyanide anions in acetonitrile have also been examined. The influence of electron donating diethylamino group in coumarin ring and hydroxyl in benzoyl group on recognition properties was explored. The results indicate that the compounds can recognize cyanide anions with obvious absorption and fluorescence spectral change and high sensitivity. The import of diethylamine group increases smartly the absorption ability and fluorescence intensity of the compound, which allows the recognition for cyanide anions can be observed by naked eyes. The in situ hydrogen nuclear magnetic resonance spectra combining photophysical properties change and job's plot data confirm that Michael addition between the chemosensors and cyanide anions occurs. Molecular conjugation is interrupted, which leads to fluorescence quenching. At the same time, there is a certain extent hydrogen bond reaction between cyanide and hydroxyl group in the compounds, which is beneficial to the recognition." @default.
- W2605588219 created "2017-04-28" @default.
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- W2605588219 date "2017-08-01" @default.
- W2605588219 modified "2023-10-16" @default.
- W2605588219 title "Two benzoyl coumarin amide fluorescence chemosensors for cyanide anions" @default.
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- W2605588219 doi "https://doi.org/10.1016/j.saa.2017.04.008" @default.
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