Advertisement

Applied Magnetic Resonance

, Volume 20, Issue 4, pp 473–482 | Cite as

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

  • A. S. Mashnin
  • S. V. Anishchik
  • V. I. Borovkov
  • I. V. Yeletskikh
  • O. A. Anisimov
  • Yu. N. Molin
Article

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.

Keywords

Radical Cation Magnetic Field Strength Weak Magnetic Field Solvent Viscosity Magnetic Field Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Anisimov O.A., Grigoryants V.M., Molchanov V.K., Molin Yu.N.: Chem. Phys. Lett.66, 265–268 (1979)CrossRefADSGoogle Scholar
  2. 2.
    Trifunac A.D., Smith J.P.: Chem. Phys. Lett.73, 94–97 (1980)CrossRefADSGoogle Scholar
  3. 3.
    Molin Yu.N., Anisimov O.A., Melekhov V.I., Smirnov S.N.: Faraday Discuss. Chem. Soc.78, 289–301 (1984)CrossRefGoogle Scholar
  4. 4.
    Saik V.O., Lukzen N.N., Grigoryants V.M., Anisimov O.A., Doktorov A.B., Molin Yu.N.: Chem. Phys.84, 421–430 (1984)CrossRefGoogle Scholar
  5. 5.
    Saik V.O., Anisimov O.A., Lozovoy V.V., Molin Yu.N.: Z. Naturforsch. A40, 239–245 (1985)ADSGoogle Scholar
  6. 6.
    Desrosiers M.F., Trifunac A.D.: Chem. Phys. Lett.121, 382–385 (1985)CrossRefADSGoogle Scholar
  7. 7.
    Desrosiers M.F., Trifunac A.D.: J. Phys. Chem.90, 1560–1564 (1986)CrossRefGoogle Scholar
  8. 8.
    Koptyug A.V., Saik V.O., Anisimov A.O., Molin Yu.N.: Chem. Phys.138, 173–178 (1989)CrossRefGoogle Scholar
  9. 9.
    Werst D.W., Trifunac A.D.: J. Phys. Chem.92, 1093–1103 (1988)CrossRefGoogle Scholar
  10. 10.
    Tadjikov B.M., Stass D.V., Molin Yu.N.: J. Phys. Chem. A101, 377–383 (1997)CrossRefGoogle Scholar
  11. 11.
    Klein J., Voltz R.: Can. J. Chem.55, 2102–2106 (1977)CrossRefGoogle Scholar
  12. 12.
    Brocklehurst B.: J. Chem. Soc. Faraday Trans.93, 1079–1087 (1997)CrossRefGoogle Scholar
  13. 13.
    Brocklehurst B.: Radiat. Phys. Chem.50, 213–225 (1997)CrossRefADSGoogle Scholar
  14. 14.
    Bagryansky V.A., Usov O.M., Lukzen N.N., Molin Yu.N.: Appl. Magn. Reson.12, 505–512 (1997)CrossRefGoogle Scholar
  15. 15.
    Salikhov K.M.: Magnetic Isotope Effect in Radical Reactions, p. 90. Wien: Springer 1996.Google Scholar
  16. 16.
    Anishchik S.V., Grigoryants V.M., Shebolaev I.V., Chernousov Yu.D., Anisimov O.A., Molin Yu.N.: Prib. Tekh. Eks.4, 74–76 (1989)Google Scholar
  17. 17.
    Veselov A.V., Melekhov V.I., Anisimov O.A., Molin Yu.N., Ushida K., Shida T.: Chem. Phys. Lett.133, 478–481 (1987)CrossRefADSGoogle Scholar
  18. 18.
    Wilson R., Kivelson D.: J. Chem. Phys.44, 154–168 (1966)CrossRefADSGoogle Scholar

Copyright information

© Springer 2001

Authors and Affiliations

  • A. S. Mashnin
    • 1
  • S. V. Anishchik
    • 1
    • 2
  • V. I. Borovkov
    • 1
    • 2
  • I. V. Yeletskikh
    • 2
  • O. A. Anisimov
    • 1
  • Yu. N. Molin
    • 1
  1. 1.Institute of Chemical Kinetics and CombustionRussian Academy of SciencesNovosibirskRussian Federation
  2. 2.Novosibirsk State UniversityNovosibirskRussian Federation

Personalised recommendations