Wang X, Li Z, Nie J, Wu L, Chen W, Qi S, Xu H, Du J, Shan Y, Yang Q. A novel hydrophilic fluorescent probe for Cu
2+ detection and imaging in HeLa cells.
RSC Adv 2021;
11:10264-10271. [PMID:
35423512 PMCID:
PMC8695708 DOI:
10.1039/d0ra09894a]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 02/26/2021] [Indexed: 01/16/2023] Open
Abstract
Copper is an essential element in living systems and plays an important role in human physiology; therefore, methods to detect the concentration of copper ions in living organisms are important. Herein, we report a highly water-soluble naphthalimide-based fluorescent probe that can be used for the detection of Cu2+. The probe, BNQ, has high selectivity and sensitivity. The fluorescence intensity of the probe at 520 nm was visible to the naked eye under a UV lamp; upon the gradual addition of Cu2+, there was a colour change from green to nearly colourless. Furthermore, the detection limit of BNQ for Cu2+ was 45.5 nM. The detection mechanism was investigated using a Job's plot and density functional theory (DFT) calculations. In addition, owing to great biocompatibility, we were able to successfully use BNQ to detect Cu2+ in living HeLa cells with low toxicity.
Probe BNQ was successfully used for detection of exogenous Cu2+ in cells using a rare ESDPT sensing mechanism.![]()
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