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A novel fluorescent probe based on naphthalimide and nile blue for selective recognition of Cu2+ and pH
•The novel and dual responsive fluorescent probe NapL is sensitive for Cu2+ and pH.•The probe NapL has been successfully used for the detection of Cu2+ in MCF-7 breast cancer cells under neutral conditions with low toxicity.•The probe NapL has been successfully used to make convenient and low-cost p...
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Published in: | Journal of molecular structure 2023-12, Vol.1294, p.136541, Article 136541 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •The novel and dual responsive fluorescent probe NapL is sensitive for Cu2+ and pH.•The probe NapL has been successfully used for the detection of Cu2+ in MCF-7 breast cancer cells under neutral conditions with low toxicity.•The probe NapL has been successfully used to make convenient and low-cost pH test strip for detecting pH range (7.4–2.1).
A dual responsive and “turn-on” fluorescent probe NapL with large Stokes shift (115 nm) and large fluorescence emission (585 nm) was designed, synthesized and investigated. NapL has high selective and suitable sensitive (LOD = 82.6 nM) towards Cu2+ over a wide pH range (7.4–12.1) through a fluorescence “turn-on” mechanism and with rapid response to Cu2+ (30 s) in complex environments. Furthermore, NapL is sensitive toward pH changes within range (7.4–2.1) with obvious "turn - on" effect (about 37- fold). The sensitive detection characteristics of Cu2+ can be ascribed to the coordination performance of N and O atoms to Cu2+, whereas pH responsiveness is ascribed to the protonation of imino group. NapL has been made into convenient and low-cost pH test strip for detecting pH range (7.4–2.1), and it has also been successfully used for the detection of Cu2+ in MCF-7 breast cancer cells under neutral conditions. |
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ISSN: | 0022-2860 1872-8014 |
DOI: | 10.1016/j.molstruc.2023.136541 |