| Numéro |
J. Phys. Colloques
Volume 40, Numéro C2, Mars 1979
International Conference on The Applications of The Mössbauer Effect
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|---|---|---|
| Page(s) | C2-420 - C2-422 | |
| DOI | https://doi.org/10.1051/jphyscol:19792147 | |
J. Phys. Colloques 40 (1979) C2-420-C2-422
DOI: 10.1051/jphyscol:19792147
AFTER EFFECTS OF EC-DECAY 57Co - LABELLED TRIS (OXINATO) COBALT (III) AND TRIS (β-DIKETONATO) COBALT( I I I )
K. Endo, M. Harada, Y. Sakai and H. SanoDepartment of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, Setagaya, Tokyo, 158, Japan
Résumé
Les spectres Mössbauer d'émission du tris (oxinato) cobalt (III) et du tris (ß-dicetonato) cobalt (III) diamagnétiques (S=O) marqués au 57Co ont été comparés aux spectres d'absorption de 57Fe(oxine)3 et 57Fe(acac)3 paramagnétiques (S=5/2) dilués de Al(oxine)3 et Co(acac)3, respectivement. La structure magnétique hyperfine apparaît dans les spectres d'émission de Co(dbm)3 (dbm = dibenzoylméthanate) et Co(oxine)3 marqués au 57Co à 78 K, tandis que les spectres des autres composés n'ont pas montré de telle structure magnétique hyperfine.
Abstract
The emission Mössbauer spectra of diamagnetic (S=O) 57Co-labelled tris(oxinato) cobalt (III) and tris (β-diketonato) cobalt (III) were compared with the absorption spectra of paramagnetic (S=5/2) 57Fe(oxine)3 and 57Fe(acac)3 diluted with diamagnetic Al(oxine)3 and Co(acac)3, respectively. Magnetic hfs appears in the emission spectra of 57Co-labelled Co(dbm)3 (dbm = dibenzoylmethanate) and Co(oxine)3 at 78 K, whereas the spectra of other complexes show essentially no such magnetic hfs.