Publication: Ingeniería de oxígeno y resolución atómica:herramientas ineludibles para el estudio de nuevos óxidos en el sistema Ca₂Mn₃O₈-δ
Loading...
Files
Official URL
Full text at PDC
Publication Date
2018-09-11
Authors
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Complutense de Madrid
Citations
Exportar
Abstract
La inusitada expectación despertada por los óxidos mixtos de manganeso se debe, en gran medida, a la enorme capacidad de este elemento de transición para adoptar diferentes estados de oxidación y entornos de coordinación, lo que ha conducido al desarrollo de un amplio abanico de dispositivos tecnológicos basados en un variado comportamiento funcional. La utilización de técnicas de ingeniería de oxígeno para controlar el estado de oxidación del manganeso permite modificar, entre otras, sus propiedades de transporte y catalíticas. La variación de su índice de coordinación conduce a la estabilización de estructuras con una subred aniónica más o menos compleja. Más aún, el catión que ocupa los huecos que generan los poliedros [MnOx] juega un papel crucial en la estabilidad de un determinado tipo estructural. Esta riqueza composicional y estructural se ha mostrado en todo su esplendor en el último cuarto de siglo al aprovechar el comportamiento redox de estos sistemas, no sólo a través de su conocida actividad catalítica en la oxidación selectiva de algunos hidrocarburos y, en general, en procesos de oxidación de compuestos orgánicos, sino también por su ampliamente estudiado comportamiento magnético, particularmente analizado en los óxidos mixtos de manganeso con magnetorresistencia colosal...
The unusual interest provoked by mixed manganese oxides is mainly due to the enormous capability of this transition element to adopt different oxidation states and coordination environments, which has led to the development of a wide range of technological devices based on a broad functional behaviour. The modification of the manganese oxidation state allows to modify, among others, its transport and catalytic properties. The variation of its coordination environment allows to stabilize structures with a more or less complex anion sublattice. Moreover, the cation occupying the holes generated by the [MnOx] polyhedra plays a crucial role in the stability of a given structural type. This compositional and structural richness has shown itself in all its magnificence in the last quarter of a century by exploiting the redox behaviour of these systems, not only through its known catalytic activity in the selective oxidation of some hydrocarbons and, in general, in oxidation processes of organic compounds, but also by its widely studied magnetic behaviour, particularly analyzed in mixed manganese oxides with colossal magnetoresistance...
The unusual interest provoked by mixed manganese oxides is mainly due to the enormous capability of this transition element to adopt different oxidation states and coordination environments, which has led to the development of a wide range of technological devices based on a broad functional behaviour. The modification of the manganese oxidation state allows to modify, among others, its transport and catalytic properties. The variation of its coordination environment allows to stabilize structures with a more or less complex anion sublattice. Moreover, the cation occupying the holes generated by the [MnOx] polyhedra plays a crucial role in the stability of a given structural type. This compositional and structural richness has shown itself in all its magnificence in the last quarter of a century by exploiting the redox behaviour of these systems, not only through its known catalytic activity in the selective oxidation of some hydrocarbons and, in general, in oxidation processes of organic compounds, but also by its widely studied magnetic behaviour, particularly analyzed in mixed manganese oxides with colossal magnetoresistance...
Description
Tesis de la Universidad Complutense de Madrid, Facultad de Ciencias Químicas, Departamento de Química Inorgánica I, leída el 29-06-2017