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Título : Heat-induced charge transfer in cobalt iron cyanide
Palabras clave : A. Inorganic compounds
D. Crystal structure
C. Infrared spectroscopy
C. Mo¨ ssbauer spectroscopy
C. X-ray diffraction
Fecha de publicación : 16-ene-2013
Editorial : ScienceDirect
Descripción : The heating of Co(2+) ferricyanide above 80 1C induces an inner charge transfer from Co(2+) towards Fe(III) to form the mixed valence system Co(2+)Co(III) ferri- ferro-cyanide. This charge transfer takes place preserving the material framework and forming a solid solution of the initial and final species. The cell edge of the cubic cell (Fm-3m) of this solid solution follows a regular variation with the material composition. This mixed valence system was characterized using X-ray diffraction, infrared, thermo-gravimetric, Mo¨ ssbauer and magnetic measurements. Its formation is easily detected by the appearance of an intermediate n(CN) absorption band in the infrared spectra at around 2120 cm 1, 40cm 1 below and above the observed frequency for this vibration in Co(2+) ferri- and ferro-cyanide, respectively. r 2006 Elsevier Ltd. All rights reserved.
URI : http://www.repositoriodigital.ipn.mx/handle/123456789/11236
Otros identificadores : Journal of Physics and Chemistry of Solids 67 (2006) 2289–2299
Aparece en las colecciones: Doctorado

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