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• W2916833829 abstract "Herein, a new molecular autocatalytic reaction scheme based on a H2 O2 -mediated deprotection of a boronate ester probe into a redox cycling compound is described, generating an exponential signal gain in the presence of O2 and a reducing agent or enzyme. For such a purpose, new chemosensing probes built around a naphthoquinone/naphthohydroquinone redox-active core, masked by a self-immolative boronic ester protecting group, were designed. With these probes, typical autocatalytic kinetic traces with characteristic lags and exponential phases were obtained by using either UV/Visible or fluorescence optical detection, or by using electrochemical monitoring. Detection of concentrations as low as 0.5 μm H2 O2 and 0.5 nm of a naphthoquinone derivative were achieved in a relatively short time (<1 h). From kinetic analysis of the two cross-activated catalytic loops associated with the autocatalysis, the key parameters governing the autocatalytic reaction network were determined, indirectly showing that the analytical performances are currently limited by the slow nonspecific self-deprotection of boronate probes. Collectively, the present results demonstrate the potential of this new exponential molecular amplification strategy, which, owing to its generic nature and modularity, is quite promising for coupling to a wide range of bioassays involving H2 O2 or redox cycling compounds, or for use as a new building block in the development of more complex chemical reaction networks." @default.
• W2916833829 created "2019-03-02" @default.
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• W2916833829 date "2019-04-08" @default.
• W2916833829 modified "2023-10-17" @default.
• W2916833829 title "Exponential Molecular Amplification by H₂O₂‐Mediated Autocatalytic Deprotection of Boronic Ester Probes to Redox Cyclers" @default.
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• W2916833829 doi "https://doi.org/10.1002/chem.201900627" @default.
• W2916833829 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30809849" @default.
• W2916833829 hasPublicationYear "2019" @default.
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