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Paramagnetic relaxation of radical cations in alkane solutions as measured by time-resolved magnetic field effects

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Abstract

Spin-lattice relaxation times of radical cations were measured by the decay of the time-resolved magnetic field effect in the recombination fluorescence of radical ion pairs in liquid hydrocarbons at high concentrations of solvent holes acceptor. The dependences of spin-lattice relaxation time on the magnetic field strength and solvent viscosity were studied. The results could not be explained in terms of the model of ion-molecular charge transfer involving monomeric or dimeric radical cations. The paramagnetic relaxation observed in a weak magnetic field is attributed to internal reorganizations of aggregates that originate from radical cations at high acceptor concentration.

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Authors and Affiliations

  1. Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk, Russian Federation

    A. S. Mashnin, S. V. Anishchik, V. I. Borovkov, O. A. Anisimov & Yu. N. Molin

  2. Novosibirsk State University, Novosibirsk, Russian Federation

    S. V. Anishchik, V. I. Borovkov & I. V. Yeletskikh

Authors
  1. A. S. Mashnin
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  2. S. V. Anishchik
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  3. V. I. Borovkov
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  4. I. V. Yeletskikh
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  5. O. A. Anisimov
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  6. Yu. N. Molin
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Mashnin, A.S., Anishchik, S.V., Borovkov, V.I. et al. Paramagnetic relaxation of radical cations in alkane solutions as measured by time-resolved magnetic field effects. Appl. Magn. Reson. 20, 473–482 (2001). https://doi.org/10.1007/BF03162330

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  • DOI: https://doi.org/10.1007/BF03162330

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