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Applied Magnetic Resonance

, Volume 44, Issue 4, pp 509–517 | Cite as

Temperature Dependence of Electron Spin Relaxation of 2,2-Diphenyl-1-Picrylhydrazyl in Polystyrene

  • Virginia Meyer
  • Sandra S. Eaton
  • Gareth R. Eaton
Article

Abstract

The electron spin relaxation rates for the stable radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) doped into polystyrene were studied by inversion recovery and electron spin echo at X-band and Q-band between 20 and 295 K. At low concentration (340 μM, 0.01 %), spin–lattice relaxation was dominated by the Raman process and a local mode. At high concentration (140 mM, 5 %), relaxation is orders of magnitude faster than at the lower concentration, and 1/T 1 is approximately linearly dependent on the temperature. Spin lattice relaxation rates are similar at X-band and Q-band. The temperature dependence of spin echo dephasing was faster at about 140 K than at higher or lower temperatures, which is attributed to a wagging motion of the phenyl groups.

Keywords

Electron Paramagnetic Resonance DPPH Relaxation Rate Dynamic Nuclear Polarization Spin Lattice Relaxation Rate 
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.

Notes

Acknowledgments

The partial support of this work by NIH NIBIB grant EB002807 (GRE and SSE) is gratefully acknowledged.

References

  1. 1.
    S.V. Kolaczkowski, J.T. Cardin, D.E. Budil, Appl. Magn. Reson. 16, 293–298 (1999)CrossRefGoogle Scholar
  2. 2.
    Z.H. Jang, B.J. Suh, M. Corti, L. Cattaneo, D. Hajny, F. Borsa, M. Luban, Rev. Sci. Instrum. 79, 046101 (2008)ADSCrossRefGoogle Scholar
  3. 3.
    I.V. Smolyaninov, N.A. Antonova, A.I. Poddel’sky, S.A. Smolyaninova, V.P. Osipova, N.T. Berberova, J. Organomet. Chem. 696, 2611–2620 (2011)CrossRefGoogle Scholar
  4. 4.
    G.E. Schacher, Phys. Rev. 135, A185–A190 (1964)ADSCrossRefGoogle Scholar
  5. 5.
    J.P. Goldsborough, M. Mandel, G.E. Pake, Phys. Rev. Lett. 4, 13–15 (1960)ADSCrossRefGoogle Scholar
  6. 6.
    T.J.B. Swanenberg, N.J. Poulis, G.W.J. Drewes, Physica 29, 713–720 (1963)CrossRefGoogle Scholar
  7. 7.
    G. Hocherl, H.C. Wolf, Z. Phys. 183, 341–351 (1965)ADSCrossRefGoogle Scholar
  8. 8.
    H. Yoshida, K. Hayashi, S. Okamura, Arkiv. Kemi. 23, 177–189 (1964)Google Scholar
  9. 9.
    J. Turkevich, J. Soria, M. Che, J. Chem. Phys. 56, 1463–1466 (1972)ADSCrossRefGoogle Scholar
  10. 10.
    M.K. Bowman, L. Kevan, in Time Domain Electron Spin Resonance, ed. by L. Kevan, R.N. Schwartz (Wiley, New York, 1979), pp. 68–105Google Scholar
  11. 11.
    S.W. Provencher, J. Chem. Phys. 64, 2772–2777 (1976)ADSCrossRefGoogle Scholar
  12. 12.
    G.C. Borgia, R.J.S. Brown, P. Fantazzini, J. Magn. Reson. 147, 273–285 (2000)ADSCrossRefGoogle Scholar
  13. 13.
    G.C. Borgia, R.J.S. Brown, P. Fantazzini, J. Magn. Reson. 132, 65–77 (1998)ADSCrossRefGoogle Scholar
  14. 14.
    S.S. Eaton, G.R. Eaton, Biol. Magn. Reson. 19, 29–154 (2000)CrossRefGoogle Scholar
  15. 15.
    J. Murphy, Phys. Rev. 145, 241–247 (1966)ADSCrossRefGoogle Scholar
  16. 16.
    J.G. Castle Jr, D.W. Feldman, J. Appl. Phys. 36, 124–128 (1965)ADSCrossRefGoogle Scholar
  17. 17.
    S.S. Eaton, K.M. More, B.M. Sawant, G.R. Eaton, J. Am. Chem. Soc. 105, 6560–6567 (1983)CrossRefGoogle Scholar
  18. 18.
    S. Chandrasekar, Rev. Mod. Phys. 15, 1–87 (1943)ADSCrossRefGoogle Scholar
  19. 19.
    V.A. Atsarkin, V.V. Demikov, G.A. Vasneva, Phys. Rev. B 56, 9448–9453 (1997)ADSCrossRefGoogle Scholar
  20. 20.
    L. van Gerven, A. Van Itterbeek, L. De Laet, in Paramagnetic Resonance, ed. by W. Low (1963), p. 905–918Google Scholar
  21. 21.
    H. Sato, V. Kathirvelu, A.J. Fielding, S.E. Bottle, J.P. Blinco, A.S. Micallef, S.S. Eaton, G.R. Eaton, Mol. Phys. 105, 2137–2151 (2007)ADSCrossRefGoogle Scholar
  22. 22.
    I.M. Brown, J. Chem. Phys. 65, 630–638 (1976)ADSCrossRefGoogle Scholar
  23. 23.
    H. Sato, V. Kathirvelu, G. Spagnol, S. Rajca, S.S. Eaton, G.R. Eaton, J. Phys. Chem. B. 112, 2818–2828 (2008)CrossRefGoogle Scholar
  24. 24.
    D.A. Davids, E.P. Wagner, Phys. Rev. Lett. 12, 141–142 (1964)ADSCrossRefGoogle Scholar
  25. 25.
    H. Sato, S.E. Bottle, J.P. Blinco, A.S. Micallef, G.R. Eaton, S.S. Eaton, J. Magn. Reson. 191, 66–77 (2008)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Wien 2012

Authors and Affiliations

  • Virginia Meyer
    • 1
  • Sandra S. Eaton
    • 1
  • Gareth R. Eaton
    • 1
  1. 1.Department of Chemistry and BiochemistryUniversity of DenverDenverUSA

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