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Quantum yield and rate constant of the singlet 1Δ g oxygen luminescence in an aqueous medium in the presence of nanoscale inhomogeneities

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Abstract

The quantum yields and lifetimes of photosensitized luminescence of the 1Δ g state of singlet oxygen in an aquatic media with a controlled concentration of dielectric anisotropy centers (polyethylene glycol) have been measured using the methods of laser fluorometry. It is established that the quantum yield and the rate constant (k r ) of the a 1Δ g → X 3Σ - g luminescence of 1O2 increase as the polymer concentration increases. The effect is analyzed within a general approach involving a relationship between kr and dielectric properties of the medium and is explained by the increased density of photon states and the local field factor in the space around O2(а 1Δ g ).

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Authors and Affiliations

  1. Stepanov Institute of Physics of National Academy of Science of Belarus, Minsk, 220072, Belarus

    E. S. Jarnikova, M. V. Parkhats, S. V. Lepeshkevich & B. M. Dzhagarov

  2. Department of Chemistry, York University, M3J 1P3, Toronto, Ontario, Canada

    A. S. Stasheuski

Authors
  1. E. S. Jarnikova
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  2. M. V. Parkhats
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  3. A. S. Stasheuski
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  4. S. V. Lepeshkevich
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  5. B. M. Dzhagarov
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Correspondence to B. M. Dzhagarov.

Additional information

Original Russian Text © E.S. Jarnikova, M.V. Parkhats, A.S. Stasheuski, S.V. Lepeshkevich, B.M. Dzhagarov, 2017, published in Optika i Spektroskopiya, 2017, Vol. 122, No. 4, pp. 616–621.

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Jarnikova, E.S., Parkhats, M.V., Stasheuski, A.S. et al. Quantum yield and rate constant of the singlet 1Δ g oxygen luminescence in an aqueous medium in the presence of nanoscale inhomogeneities. Opt. Spectrosc. 122, 596–601 (2017). https://doi.org/10.1134/S0030400X17040221

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  • DOI: https://doi.org/10.1134/S0030400X17040221

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