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• W4200516663 endingPage "1455" @default.
• W4200516663 startingPage "1447" @default.
• W4200516663 abstract "The lack of reliable approaches for real-time measurement and quantification of polysulfides (H2Sn) in vivo greatly limits the exploration of their potential roles in brain functions. Herein, an electrochemical probe, 4-(5-(1,2-dithiolan-3-yl)pentanamido)-1,2-phenylene bis(2-fluoro-5-nitrobenzoate) (FP2), was rationally designed and created for determination of H2Sn. The bis-electrophilic groups of FP2 could specifically recognize two -SH groups in H2Sn and trigger the generation of an electroactive pyrocatechol moiety, resulting in a well-defined faradic current signal at ∼0.24 V (vs Ag/AgCl). Meanwhile, bidentate thiols were designed as anchoring sites to greatly improve the assembled stability of FP2 at the Au surface, which efficiently defended the interference of glutathione (GSH) with a current decrease of less than 5.2% even after long-term measurements in 5 mM GSH for 3 h. In addition, a stable inner reference molecule with dithiols, α-lipoic acid ferrocenylamide (FcBT), was synthesized to construct a ratiometric electrochemical strategy for in vivo determination of H2Sn through one-step coassembling with FP2 via double S-Au bonds. The present ratiometric strategy demonstrated high selectivity for real-time tracking of H2Sn in a linear range of 0.25-20 μM. Eventually, the developed microelectrode with high selectivity, accuracy, and stability was employed for in vivo assaying of H2Sn in mouse brains with ischemia." @default.
• W4200516663 created "2021-12-31" @default.
• W4200516663 creator A5011031924 @default.
• W4200516663 creator A5065295188 @default.
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• W4200516663 date "2021-12-24" @default.
• W4200516663 modified "2023-10-14" @default.
• W4200516663 title "Highly Stable Electrochemical Probe with Bidentate Thiols for Ratiometric Monitoring of Endogenous Polysulfide in Living Mouse Brains" @default.
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• W4200516663 doi "https://doi.org/10.1021/acs.analchem.1c04894" @default.
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