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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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