Temperature dependence of the mixed-valence state of57Fe-atoms produced in57Co-Labelled oxo-centered trinuclear iron acetate complexes |
| |
| Authors: | T. Sato M. Katada H. Sano |
| |
| Affiliation: | (1) Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, 158 Setagaya, Tokyo, Japan |
| |
| 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
