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Sensitive Fluorescent Sensor for Hydrogen Sulfide in Rat Brain Microdialysis via CsPbBr 3 Quantum Dots.
- Source :
-
Analytical chemistry [Anal Chem] 2019 Dec 17; Vol. 91 (24), pp. 15915-15921. Date of Electronic Publication: 2019 Dec 06. - Publication Year :
- 2019
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Abstract
- The instability and insolubility of perovskite quantum dots in aqueous solution prohibit applications in polar solvents. As a highly toxic gas pollutant and also an endogenous gaseous signaling molecule existing in a variety of physiological processes, hydrogen sulfide (H <subscript>2</subscript> S), with high selectivity and high specificity, detection is of great significance. In this study, a simple device has been designed to separate H <subscript>2</subscript> S from aqueous solution and CsPbBr <subscript>3</subscript> quantum dots (CsPbBr <subscript>3</subscript> QDs) have been used as the detection probe to develop a novel fluorescent sensor for rapid H <subscript>2</subscript> S detection. The addition of hydrogen sulfide to the phosphoric acid solution results in the escape of H <subscript>2</subscript> S from the aqueous sample and hence it passing into the n -hexane solution containing CsPbBr <subscript>3</subscript> QDs, resulting in the quenching of the fluorescence of CsPbBr <subscript>3</subscript> QDs. The fluorescence intensity of the system has a linear relationship with the concentration of H <subscript>2</subscript> S in the range of 0-100 μM with the detection limit of 0.18 μM. The proposed system has been applied to detection of H <subscript>2</subscript> S in rat brain microdialysate with satisfying results. The potential mechanism regarding the quenching of fluorescence from CsPbBr <subscript>3</subscript> QDs by H <subscript>2</subscript> S has been studied as well.
Details
- Language :
- English
- ISSN :
- 1520-6882
- Volume :
- 91
- Issue :
- 24
- Database :
- MEDLINE
- Journal :
- Analytical chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 31755262
- Full Text :
- https://doi.org/10.1021/acs.analchem.9b04387