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Temperature dependence of the mixed-valence state of57Fe-atoms produced in57Co-Labelled oxo-centered trinuclear iron acetate complexes

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Abstract

Emission Mössbauer spectra of mixedvalence trinuclear complexes,57Co-labelled [CoFe2O(CH3CO2)6(H2O)3] and [CoFe2O(CH3CO2)6 (py)3]py were compared with that of [CoCr2O(CH3CO2)6 (py)3]py. It was found that the57Fe atoms produced in57Co-labelled [CoFe2O(CH3CO2)6(H2O)3] and [CoFe2O(CH3CO2)6 (py)3]py showed a temperature-dependent mixed-valence state as observed in the absorption Mössbauer spectra of [Fe3O(CH3CO2)6 (H2O)3] and [Fe3O(CH3CO2)6 (py)3]py, respectively, while57Co-labelled [CoCr2O(CH3CO2)6 (py)3]py showed a temperature-independent divalent iron/II/ state. The results indicate that the decayed atoms keep their position at the sites of original57Co atoms and that the valence electrons are transferred through the intramolcular bondings.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, 158, Setagaya, Tokyo, Japan

    T. Sato, M. Katada & H. Sano

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  1. T. Sato
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  2. M. Katada
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  3. H. Sano
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Sato, T., Katada, M. & Sano, H. Temperature dependence of the mixed-valence state of57Fe-atoms produced in57Co-Labelled oxo-centered trinuclear iron acetate complexes. Journal of Radioanalytical and Nuclear Chemistry Letters 144, 195–202 (1990). https://doi.org/10.1007/BF02218163

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  • DOI: https://doi.org/10.1007/BF02218163

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