Abstract
The spin-crossover behaviors of mixed-valence iron compounds [FeIIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIILMe](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3L is a hexadentate N6 tripod ligand containing three imidazole groups and H3LMe is its 2-methylimidazole derivative. Deconvolution analyses of the Mössbauer spectra revealed that a two-step SCO (LS FeII–LS FeIII→HS FeII–LS FeIII→HS FeII–HS FeIII) proceeds in each compound on elevating the temperature. Compound 2 exhibited lower spin-transition temperatures than 1. “Frozen-in effect” was observed below 120 and 50 K for 1 and 2, respectively.
Similar content being viewed by others
References
Sunatsuki, Y., Ikuta, Y., Matsumoto, N., Ohta, H., Kojima, M., Iijima, S., Hayami, S., Maeda, Y., Kaizaki, S., Dahan, F., Tuchagues, J.-P.: Angew. Chem., Int. Ed. Engl. 42, 1614 (2003)
Ikuta, Y., Ooidemizu, M., Yamahata, Y., Yamada, M., Osa, S., Matsumoto, N., Iijima, S., Sunatsuki, Y., Kojima, M., Dahan, F., Tuchagues, J.-P.: Inorg. Chem. 42, 7001 (2003)
Maeda, Y., Oshio, H., Takashima, Y., Mikuriya, M., Hidaka, M.: Inorg. Chem. 25, 2958 (1986)
Timken, M.D., Abdel-Maugoud, A.M., Hendrickson, D.N.: Inorg. Chem. 25, 160 (1986)
Blume, M., Tjon, J.A.: Phys. Rev. 165, 446 (1968)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Iijima, S., Mizutani, F., Niwa, O. et al. Mössbauer studies of mixed-valence spin-crossover iron complexes with a hexadentate tripod ligand. Hyperfine Interact 166, 397–402 (2005). https://doi.org/10.1007/s10751-006-9299-0
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10751-006-9299-0