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Stretched exponential kinetics of the luminescence concentration depolarization and penetration depth of molecules in a medium

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Abstract

The kinetics of the luminescence concentration depolarization of molecules in a medium is studied theoretically. It is shown that the concentration depolarization kinetics is well described by a stretched exponential function of time, r(t)/r 0 ≈ exp[−b(t/τ)β], where r(t) and r 0 are the luminescence anisotropy values at time moments t and t = 0, respectively. The parameters b and β allow the determinnation of the penetration depth of the molecules in the medium.

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Authors and Affiliations

  1. Petersburg State Transport University, St. Petersburg, 190031, Russia

    E. N. Bodunov

  2. Centro de Quimica-Fisica Molecular and Institute of Nanotechnology, Instituto Superior Técnico, Universitade de Lisboa, Lisboa, Portugal

    M. N. Berberan-Santos

Authors
  1. E. N. Bodunov
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  2. M. N. Berberan-Santos
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Correspondence to E. N. Bodunov.

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Original Russian Text © E.N. Bodunov, M.N. Berberan-Santos, 2015, published in Optika i Spektroskopiya, 2015, Vol. 119, No. 1, pp. 25–31.

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Bodunov, E.N., Berberan-Santos, M.N. Stretched exponential kinetics of the luminescence concentration depolarization and penetration depth of molecules in a medium. Opt. Spectrosc. 119, 22–28 (2015). https://doi.org/10.1134/S0030400X1507005X

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  • DOI: https://doi.org/10.1134/S0030400X1507005X

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