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An easily accessible fluorescent chemosensor bearing a naphthalimide group has been designed. The chemosensor is highly selective and sensitive for Cu2+ ions in ethanol‐water solution compared with other tested metal ions and anions. The chemosensor, which contains a CN group, fluoresces weakly when excited at 340 nm. Upon addition of Cu2+ ions, a fluorescent enhancement is observed with emission at λem=433 nm, and no such significant changes are found with other metal ions and anions. With optimized conditions, the linear fluorescence enhancement of the sensor towards Cu2+ ions is in the range of 0.05–1.5 μM with a detection limit of 0.025 μM.
Asian Journal of Organic Chemistry – Wiley
Published: Dec 1, 2014
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