Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Antiferromagnetic coupling in [Mn12O12(O2CMe)6(p-CO2-phenyl nitronyl

  • 39 Accesses


The synthesis of [Mn12O12(O2CMe)6(p-CO2-phenyl nitronyl nitroxide)10(H2O)4]· 4H2O, (1), by direct replacement of some of the acetate groups in [Mn12O12(O2CMe)16(H2O)4] · 4H2O · 2MeCO2H, (2), with the organic radical p-HO2C-phenyl nitronyl nitroxide, (3), is reported. E.p.r. spectra show exchange narrowing in (1) due to coupling between the manganese ions and radicals. The isotropic hyperfine splitting constant from the manganese ions is a = 96 Oe at 5.5K. The magnetic susceptibility indicates antiferromagnetic exchange interactions between the manganese ions and the radicals with the Weiss constant θ = -25 K. The spin was determined to be S = 6 from magnetization data in the 2--30 K temperature range at 50 kOe, suggesting a mixture of ground state with excited states.

This is a preview of subscription content, log in to check access.


  1. 1.

    T. Lis, Acta Crystallogr. Sect. B, 36, 2042 (1980).

  2. 2.

    D. Gatteschi, A. Caneschi, L. Pardi and R. Sessoli, Science, 265, 1054 (1994).

  3. 3.

    D.D. Awschalom and D.P. DiVicenzo, Phys. Today, 48, 43 (1995).

  4. 4.

    S. Gider, D.D. Awschalom, T. Douglas, S. Mann and M. Chaparala, Science, 268, 77 (1995).

  5. 5.

    H.J. Eppley, H.-L. Tsai, N. de Vries, K. Folting, G. Christou and D.N. Hendrickson, J. Am. Chem. Soc., 117, 301 (1995).

  6. 6.

    K. Takeda and K. Awaga, Phys. Rev. B, 56, 14560 (1997).

  7. 7.

    P. Gerbier, D. Ruiz-Molina, N. Domingo, D.B. Amabilino, J. Vidal-Gancedo, J. Tejeda, D.N. Hendrickson and J. Veciana, Monatsh. Chem., 134, 265 (2003).

  8. 8.

    J.M. North, R.M. Achey and N.S. Dalal, Phys. Rev. B, 66, 174437 (2002).

  9. 9.

    N.C. Schiødt, F.F. de Biani, A. Caneschi and D. Gatteschi, Inorg. Chim. Acta, 248, 139 (1996).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Vega paz, A., Padilla, J. Antiferromagnetic coupling in [Mn12O12(O2CMe)6(p-CO2-phenyl nitronyl. Transition Metal Chemistry 29, 620–622 (2004). https://doi.org/10.1007/s11243-004-2792-x

Download citation


  • 4H2O
  • Manganese
  • Excited State
  • Magnetic Susceptibility
  • Exchange Interaction