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• W2021332158 abstract "The direct electrochemistry of myoglobin (Mb) has been observed at a glassy carbon (GC) electrode coated with silica sol−gel-encapsulated Mb film. A well-behaved cyclic voltammogram is observed with a midpoint potential (E1/2) of −0.25 V vs Ag/AgCl in a pH 7.0 phosphate buffer. This potential, which is pH-dependent, is 70−90 mV more negative than the formal potential values obtained by using the spectroeletrochemical titration method at the same pH. Square wave voltametry (SWV) also shows a peak potential of −0.25 V for the reduction of Mb under the same experimental conditions. Both cathodic and anodic peak currents have a linear relationship with the scan rate. The midpoint potential decreases with pH, having a slope of −30 mV/pH. UV−vis and resonance Raman spectroscopic studies reveal that the sol−gel provides a bio-compatible environment where Mb retains a structure similar to its solution form, a 6-coordinated aquomet myoglobin. These results suggest that the silica sol−gel is a useful matrix for studying direct electrochemistry of other heme proteins." @default.
• W2021332158 created "2016-06-24" @default.
• W2021332158 creator A5033331920 @default.
• W2021332158 creator A5071055422 @default.
• W2021332158 creator A5087089135 @default.
• W2021332158 date "2005-06-28" @default.
• W2021332158 modified "2023-10-16" @default.
• W2021332158 title "Direct Electrochemistry and Raman Spectroscopy of Sol−Gel-Encapsulated Myoglobin" @default.
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• W2021332158 doi "https://doi.org/10.1021/la050422s" @default.
• W2021332158 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16042479" @default.
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