CoFe Prussian Blue Analogues under Variable Pressure. Evidence of Departure from Cubic Symmetry: X-ray Diffraction and Absorption Study

Energy dispersive X-ray diffraction and X-ray absorption spectra of two CoFe Prussian blue analogues were collected under variable pressure at room temperature: one of them is essentially composed of CoII and FeIII ions and undergoes a CoII−FeIII → CoIII−FeII pressure-induced electron transfer, wher...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2008-11, Vol.112 (45), p.17709-17715
Main Authors: Bleuzen, Anne, Cafun, Jean-Daniel, Bachschmidt, Anne, Verdaguer, Michel, Münsch, Pascal, Baudelet, François, Itié, Jean-Paul
Format: Article
Language:English
Subjects:
C: Electron Transport, Optical and Electronic Devices, Hard Matter
Chemical Sciences
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Summary:Energy dispersive X-ray diffraction and X-ray absorption spectra of two CoFe Prussian blue analogues were collected under variable pressure at room temperature: one of them is essentially composed of CoII and FeIII ions and undergoes a CoII−FeIII → CoIII−FeII pressure-induced electron transfer, whereas the other is essentially composed of CoIII and FeII ions whatever the pressure. In both compounds, the CoIII−FeII phase undergoes a structural distortion upon compression. The alkali cation free CoFe Prussian blue analogue, in which the pressure-induced electron transfer occurs, exhibits a more complicated interplay between structural and electronic events. Key interatomic interactions are proposed to account for the pressure behavior of both CoIII−FeII and CoII−FeIII phases.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp805852n