Advertisement

Hyperfine Interactions

, Volume 204, Issue 1–3, pp 119–123 | Cite as

Coordination preference and magnetic properties of FeII assemblies with a bis-azole bearing 1,2,4-triazole and tetrazole

  • Anil D. Naik
  • Antoine P. Railliet
  • Marinela M. Dîrtu
  • Yann Garcia
Article

Abstract

With a new bis-azole molecular fragment (Htt) bearing 1,2,4-triazole and tetrazole, a mononuclear complex [Fe(tt)2(H2O)4]·2H2O (1), a trinuclear complex [Fe3(tt)6(H2O)6]·2H2O (2) and a 1D coordination polymer [Fe(tt)(Htt)2]BF4·2CH3OH (3) were obtained by varying reaction conditions. Htt acts either as an anionic or neutral ligand depending upon the reaction medium and pH. Thermal variation of spin states of 13 were investigated in the range 77–300 K by 57Fe Mössbauer spectroscopy. 1 totally remains in high-spin state over the entire temperature range whereas no spin crossover was evidenced in 2. Nearly 1:1 high-spin and low-spin population ratio is found in 3, which remains constant over the entire temperature range investigated.

Keywords

57Fe Mössbauer spectroscopy Coordination polymers Spin-transition, 1,2,4-triazole 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Kahn, O., Kröber, J., Jay, C.: Spin transition molecular materials for displays and data recording. Adv. Mater. 4, 718 (1992)CrossRefGoogle Scholar
  2. 2.
    Gütlich, P., Garcia, Y., Goodwin, H.A.: Spin crossover phenomena in Fe(II) complexes. Chem. Soc. Rev. 29, 419 (2000)CrossRefGoogle Scholar
  3. 3.
    Bousseksou, A., Molnár, G., Salmon, L., Nicolazzi, W.: Molecular spin crossover phenomenon: recent achievements and prospects. Chem. Soc. Rev. 40, 3313 (2011)CrossRefGoogle Scholar
  4. 4.
    Garcia, Y., Niel, V., Muñoz, M.C., Real, J.A.: Spin crossover in 1D, 2D and 3D polymeric Fe(II) networks; spin crossover in transition metal compounds. Top. Curr. Chem. 233, 229 (2004)CrossRefGoogle Scholar
  5. 5.
    Prins, F., Monrabal-Capilla, M., Osorio, E.A., Coronado, E., van der Zant, H.S.J.: Room-temperature electrical addressing of a bistable spin-crossover molecular system. Adv. Mater. 23, 1545 (2011)CrossRefGoogle Scholar
  6. 6.
    Garcia, Y., Guionneau, P., Bravic, G., Chasseau, D., Howard, J.A.K., Kahn, O., Ksenofontov, V., Reiman, S., Gütlich, P.: Synthesis, crystal structure, magnetic properties and 57Fe Mössbauer spectroscopy of the new trinuclear [Fe3(4-(2′-hydroxy-ethyl)-1,2,4-triazole)6(H2O)6](CF3SO3)6 spin crossover compound. Eur. J. Inorg. Chem. 1531 (2000)Google Scholar
  7. 7.
    Naik, A.D., Marchand-Brynaert, J., Garcia, Y.: A simplified approach to N- and N,N′-linked 1,2,4-triazoles by transamination. Synthesis 1, 149 (2008)Google Scholar
  8. 8.
    Robert, F., Naik, A.D., Garcia, Y.: Influence of a thermochromic anion on the spin crossover of iron(II) trinuclear complexes probed by Mössbauer spectroscopy. J. Phys. Conf. Ser. 217, 012031 (2010)ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Anil D. Naik
    • 1
  • Antoine P. Railliet
    • 1
  • Marinela M. Dîrtu
    • 1
  • Yann Garcia
    • 1
  1. 1.Institute of Condensed Matter and Nanosciences, MOST–Inorganic ChemistryUniversité Catholique de LouvainLouvain-la-NeuveBelgium

Personalised recommendations