Hyperfine Interactions

, Volume 205, Issue 1–3, pp 75–79 | Cite as

Weak cooperativity in selected iron(II) 1D coordination polymers

  • Marinela M. Dîrtu
  • Damien Gillard
  • Anil D. Naik
  • Aurelian Rotaru
  • Yann Garcia
Article

Abstract

The spin crossover behaviour of a new class of FeII coordination polymers [Fe(phtptrz)3]I2 (1), [Fe(phtptrz)3](ReO4)2•CH3OH (2) and [Fe(phtptrz)3]TaF7•6H2O (3) based on a novel ligand 4-(3 -N-phtalimido-propyl)-1,2,4-triazole (phtptrz), were investigated by temperature dependent 57Fe Mössbauer spectroscopy and magnetic susceptibility measurements. The adverse effect of bulky substituent on 1,2,4-triazole, favorable supramolecular interactions and influence of increasing anion size on spin crossover profile is discussed. 1 and 2 show thermally induced spin conversions of gradual and incomplete nature with associated thermochromism, and transition temperatures T1/2 ~ 163 K and 137 K, respectively. A spin state crossover is also identified for 3.

Keywords

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

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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.
    Garcia, Y., Ksenofontov, V., Gütlich, P.: Spin transition molecular materials: new sensors. Hyperfine Interact. 139/140, 543 (2002)CrossRefGoogle Scholar
  3. 3.
    Naik, A.D., Tinant, B., Muffler, K., Wolny, J.A., Schünemann, V., Garcia, Y.: Relevance of supramolecular interactions, texture and lattice occupancy in the designer iron(II) spin crossover complexes. J. Solid State Chem. 182, 1365 (2009)ADSCrossRefGoogle 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 I. Top. Curr. Chem. 233, 229 (2004)CrossRefGoogle Scholar
  5. 5.
    Fujigaya, T., Jiang, D.-L., Aida, T.: Spin crossover dendrimers: generation number dependent cooperativity for thermal spin transition. J. Am. Chem. Soc. 127, 5484 (2005)CrossRefGoogle Scholar
  6. 6.
    Schlamp, S., Weber, B., Naik, A.D., Garcia, Y.: Cooperative spin transition in a lipid layer like system. Chem. Commun. 47, 7152 (2011)CrossRefGoogle Scholar
  7. 7.
    Boland, Y., Hertsens, P., Marchand-Brynaert, J., Garcia, Y.: New ditopic and tripodal 1,2,4-triazole-and tetrazole-based ligands for coordination chemistry. Synthesis 9, 1504 (2006)Google Scholar
  8. 8.
    Dîrtu, M.M., Rotaru, A., Gillard, D., Linares, J., Codjovi, E., Tinant, B., Garcia, Y.: Prediction of the spin transition temperature in FeII one dimensional coordination polymers: an anion based database. Inorg. Chem. 48, 7838–7852 (2009)CrossRefGoogle Scholar
  9. 9.
    Wei, Y.L., Sonar, P., Grunert, M., Kusz, J., Schlüter, A.D., Gütlich, P.: Iron(II) spin transition complexes with dendritic ligands, Part II. Eur. J. Inorg. Chem. 25, 3930 (2010)CrossRefGoogle Scholar
  10. 10.
    Kahn, O.: Molecular Magnetism. Wiley (1993)Google Scholar
  11. 11.
    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

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Marinela M. Dîrtu
    • 1
  • Damien Gillard
    • 1
  • Anil D. Naik
    • 1
  • Aurelian Rotaru
    • 2
  • Yann Garcia
    • 1
  1. 1.Institute of Condensed Matter and Nanosciences, MOST – Inorganic ChemistryUniversité Catholique de LouvainLouvain-la-NeuveBelgium
  2. 2.Department of Electrical Engineering and Computer Science“Stefan cel Mare” UniversitySuceavaRomania

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