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6942114 
Journal Article 
A highly sensitive naphthalimide-based fluorescent probe for detection of Cu2+ via selective hydrolysis reaction and its application in practical samples 
Li, X; Guo, Y; Xu, T; Fang, Min; Xu, Q; Zhang, Fan; Wu, Z; Li, Cun; Zhu, W; , 
2020 
Yes 
Journal of the Chinese Chemical Society
ISSN: 0009-4536 
WILEY-V C H VERLAG GMBH 
WEINHEIM 
67 
6 
1070-1077 
WOS:000502159700001 
A novel fluorescent probe CN3, containing 1,8-naphthalimide and picolinate units, was synthesized, and its structure was characterized by H-1 nuclear magnetic resonance spectroscopy (H NMR), C-13 nuclear magnetic resonance spectroscopy (C NMR), and mass spectroscopy techniques. The detection property of CN3 toward copper ions (Cu2+) has been investigated in ethanol-HEPES buffer (v/v = 1/1, pH = 7.40) solution by UV-Vis absorption and fluorescence emission spectra. The results showed that CN3 had a highly selective and sensitive fluorescence quenching response to Cu2+, which was attributed to the generation of weak fluorescent N-ethyl-4-hydroxyphenyl-1,8- naphthalimide (compound 2) in polar ethanol-HEPES buffer (v/v = 1/1, pH = 7.40) via selective hydrolysis reaction. The detection of CN3 for Cu2+ was not influenced in the presence of other competing metal ions, and the limit of detection was as low as 50.0 nM. Therefore, the color of CN3 changed from colorless to yellowish when the Cu2+ was added. Furthermore, the fluorescent probe CN3 was utilized to detect Cu2+ in real water samples with fine performance. 
copper ion (Cu2+); fluorescent probe; hydrolysis; naphthalimide derivative