Stabilization of highest-oxidation states of transition metals and the induced electronic phenomena in oxidic perovskite structures
Idioma
en
Article de revue
Este ítem está publicado en
Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie. 2005, vol. 631, n° 2-3, p. 556-563
Wiley-VCH Verlag
Resumen en inglés
In oxides the stabilization of the highest oxidation states n+ of transition metals leads to the stabilization of strong covalent Mn+-O bonds. Such very covalent bonds can induce electronic phenomena as spin transitions ...Leer más >
In oxides the stabilization of the highest oxidation states n+ of transition metals leads to the stabilization of strong covalent Mn+-O bonds. Such very covalent bonds can induce electronic phenomena as spin transitions through the increase of the local crystal-field energy (Dq) or in the specific case of an anisotropic eg1 electronic configuration some strong interactions with the perovskite structure (3D character, structural distortion) can lead to a insulatormetal transition or a disproportionation phenomenon. [2Mn+(M(n - )+)+(M(n+)+)] In order to illustrate such a topic, three unusual oxidation states have been selected: Co3+(d6), Fe4+(d4) and Ni3+(d7) in perovskite-type structures.< Leer menos
Palabras clave en inglés
High oxidation states
Transition metal cations
Electronic phenomena
Spin transition
Insulator metal transition
Orígen
Importado de HalCentros de investigación