• Spin-transition in nearly cubic site in [FeII(L)3][PF6]2
    V. Mishra, R. Mukherjee, J. Linares, E. Codjovi, F. Varret and L.M. Lawson Daku
    Hyperfine Interactions, 188 (1-3) (2009), p71-78
    DOI:10.1007/s10751-008-9891-6 | unige:3560 | Abstract | Article PDF
The spin-transition (1A15T2) behaviour of a new mononuclear iron(II) compound [FeII(L)3][PF6]2[L = 2-[3-(2′-pyridyl)pyrazole-1-ylmethyl]pyridine] has been investigated by 57Fe Mössbauer spectroscopy. Analysis of the Mössbauer spectra revealed low value of the quadrupole splitting of the high-spin state which reflects iron(II) to be in nearly cubic lattice site. Mössbauer spectra under light show the light-induced excited spin state trapping effect and the observed quadrupole splitting of the metastable high-spin state is found little sensitive to the high-spin fraction value. DFT calculations are in progress to document the almost cubic nature of the ligand-field acting on the iron atom.



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