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Quenching of triplet states of quinones by phenols

  • Physical Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    The kinetics of quenching the triplet states of quinones by phenols in liquid solutions are determined by the process of forming a hydrogen-bond complex between the triplet and the quenching agent and by transfer of a hydrogen atom in this complex.

  2. 2.

    The isotope effect for the rate constant in quenching triplet states of quinones by phenols first increases with increasing acidity of the phenol, and then drops off.

  3. 3.

    The quantum yields of phenoxyl and semiquinone radicals formed by quenching triplet states of quinones by phenols are usually close to 100%, In quenching by phenols with strong acidic properties, the quantum yield of the radicals is lower if the triplet state of the quinone has a low energy.

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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 765–771, April, 1984.

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Kokrashvili, T.A., Levin, P.P. & Kuz'min, V.A. Quenching of triplet states of quinones by phenols. Russ Chem Bull 33, 702–708 (1984). https://doi.org/10.1007/BF00947818

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  • DOI: https://doi.org/10.1007/BF00947818

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