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


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.


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


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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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