Valence-delocalization of the mixed-valence oxo-centered trinuclear iron propionates [Fe 2 III FeIIO(C2H5CO2)6(py)3]npy;n=0, 1.5 |
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| Authors: | Tadahiro Nakamoto Motomi Katada Satoshi Kawata Susumu Kitagawa Hirotoshi Sano Michiko Konno |
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| Affiliation: | (1) Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Minamiohsawa, Hachioji, 192-03 Tokyo, Japan;(2) Radioisotope Research Center, Tokyo Metropolitan University, Minamiohsawa, Hachioji, 192-03 Tokyo, Japan;(3) Department of Chemistry, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, 112 Tokyo, Japan |
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| Abstract: | Mixed-valence trinuclear iron propionates [Fe2IIIFeIIO(C2H5CO2)6(py)3]npy, wheren=0, 1.5, were synthesized and the structure of the pyridine-solvated complex was determined by single-crystal X-ray diffraction. Mössbauer spectra of the solvated propionate complex showed a temperature-dependent mixed-valence state related to phase transitions, reaching an almost delocalized valence state at room temperature. On the other hand, the non-solvated propionate showed a remarkable change of the spectral shape related to a phase transition, remaining in a localized valence state at higher temperatures up to room temperature. |
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