4.8 Article

Role of Proton-Coupled Electron Transfer in the Redox Interconversion between Benzoquinone and Hydroquinone

期刊

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 45, 页码 18538-18541

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AMER CHEMICAL SOC
DOI: 10.1021/ja308700t

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资金

  1. National Science Foundation [CHE-0957215]
  2. Richard T. and Hugh G. Chatham Fund for Faculty Research and Development
  3. UNC EFRC: Center for Solar Fuels, an Energy Frontier Research Center
  4. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001011]
  5. Division Of Chemistry
  6. Direct For Mathematical & Physical Scien [0957215] Funding Source: National Science Foundation

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Benzoquinone/hydroquinone redox inter conversion by the reversible Os(dmb)(3)(3+/2+) couple over an extended pH range with added acids and bases. has revealed the existence of seven discrete pathways. Application of spectrophotometric monitoring with stopped-flow mixing has been used to explore the role of PCET. The results have revealed a role for phosphoric acid and acetate as proton donor and acceptor in the concerted electron-proton transfer reduction of benzoquinone and oxidation of hydroquinone, respectively.

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