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A novel ratiometric fluorescent probe for detection of iron ions and zinc ions based on dual-emission carbon dots.
- Source :
-
Sensors & Actuators B: Chemical . Apr2019, Vol. 284, p186-192. 7p. - Publication Year :
- 2019
-
Abstract
- Graphical abstract Highlights • The dual-emission carbon dots were directly prepared by carbonizing glutathione in the water/formamide mixture. • The carbon dots exhibited dual emission peaks at 470 nm and 655 nm with excitation of 400 nm. • Fe3+ can be detected based on the fluorescence quenching at 655 nm of DCDs in acidic environments. • Zn2+ can be detected based on the fluorescence quenching at 470 nm of DCDs in alkaline environments. Abstract Herein, we developed a facile route for the preparation of dual-emission carbon dots (DCDs) by carbonizing glutathione in the water/formamide mixture. The synthesized DCDs displayed dual emission band respectively at 470 nm and 655 nm under the single-wavelength excitation at 400 nm, which can be used for the detection iron ions (Fe3+) and zinc ions (Zn2+) in different pH environments. An obvious fluorescence quenching around 655 nm was detected with the addition of Fe3+ in acidic environments, and a linear range of 2.5–30 μmol·L−1 and a detection limit of 0.8 μmol L−1 for Fe3+ were achieved. Moreover, another fluorescence quenching at 470 nm was also observed with the addition of Zn2+ in alkaline environments, and a linear range of 2.5–50 μmol L−1 and a detection limit of 1.2 μmol L−1 for Zn2+ were achieved. The prepared DCDs was used as a ratiometric fluorescent probe for determination of Fe3+ and Zn2+ ions in serum samples. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FLUORESCENT probes
*IRON ions
*ZINC ions
*GAS mixtures
*QUENCHING (Chemistry)
Subjects
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 284
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 134927565
- Full Text :
- https://doi.org/10.1016/j.snb.2018.12.139