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• W3195049519 endingPage "112976" @default.
• W3195049519 startingPage "112976" @default.
• W3195049519 abstract "The demand for efficient methods to determine mercury ion (Hg2+) is increasing. Herein, we developed a ratiometric fluorescence assay by the coupling of nanozyme and fluorescence resonance energy transfer (FRET) to determine Hg2+. Platinum nanoparticles (PtNPs) was synthesized as effective nanozyme to catalyze the oxidation of o-phenylenediamine (OPD) at the presence of hydrogen peroxide (H2O2) to produce 2,3-diaminophenazine (DAP). The fluorescence emission of Si quantum dots (QDs) at 414 nm (I414) was observed to be quenched by DAP (emission at 576 nm (I576)) via FRET mechanism, whereas Hg2+ can depress the catalytic activity of PtNPs to generate DAP. Based on this principle, SiQDs/PtNPs/OPD/H2O2-based ratiometric fluorescence assay was developed that the emission ratio of DAP and SiQDs (I576/I414) decreased with a higher concentration of Hg2+. Noteworthy, the sensitivity of such system was found to be related with the value of I576/I414. The developed assay offered a detection range of 20–3000 nM and a detection limit of 10.5 nM. This assay was applied to analyze Yangtze river water, and its reliability has been validated by the standard ICP-MS method. Our work provided an effective and convenient method for Hg2+ detection." @default.
• W3195049519 created "2021-08-30" @default.
• W3195049519 creator A5012287126 @default.
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• W3195049519 date "2021-11-01" @default.
• W3195049519 modified "2023-10-04" @default.
• W3195049519 title "Ratiometric fluorescent sensing of mercury (II) ion based on the Pt nanozyme-triggered fluorescence resonance energy transfer between Si quantum dots and 2,3-diaminophenazine" @default.
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• W3195049519 doi "https://doi.org/10.1016/j.sna.2021.112976" @default.
• W3195049519 hasPublicationYear "2021" @default.
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