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MPA-CdTe quantum dots as "on-off-on" sensitive fluorescence probe to detect ascorbic acid via redox reaction
Meiling Ding1, Kun Wang1, Min Fang1
1School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China; AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, China; Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Anhui University, Hefei 230601, China.
This study developed a novel fluorescent probe using Mercaptopropionic acid (MPA) capped Cadmium Telluride (CdTe) quantum dots (QDs) for detecting ascorbic acid (AA). The probe exhibits an "on-off-on" fluorescence response, enabling sensitive detection of AA in human plasma.
Area of Science:
- * Materials Science: Synthesis and characterization of Mercaptopropionic acid (MPA) capped Cadmium Telluride (CdTe) quantum dots (QDs).
- * Analytical Chemistry: Development of a novel fluorescent probe for sensitive detection of analytes.
- * Biochemistry: Application in biological sample analysis, specifically human plasma.
Background:
- * Quantum dots (QDs) offer unique fluorescence properties for sensing applications.
- * Ascorbic acid (AA) is a vital biomolecule with implications in health and disease.
- * Developing sensitive and selective detection methods for AA is crucial for biomedical research.
Purpose of the Study:
- * To synthesize MPA-CdTe QDs as a fluorescent probe.
- * To investigate the
- on-off-on
Main Methods:
- * Hydrothermal synthesis of MPA-CdTe QDs in an aqueous medium.
- * Modification of MPA-CdTe QDs with Fe3+ to create a quenched fluorescence state.
- * Utilizing fluorescence emission spectroscopy and nuclear magnetic resonance spectroscopy for principle validation.
Main Results:
- * Fe3+ quenched the fluorescence of MPA-CdTe QDs, establishing an
- off
Conclusions:
- * The developed Fe3+@MPA-CdTe QDs probe offers a sensitive and selective method for AA detection.
- * The
- on-off-on
