The Eu3+ charge transfer energy and the relation with the band gap of compounds

Publisher Summary This chapter discusses the characterization and reactivity of mononuclear oxygen species on oxide surfaces. Measurement of the electron paramagnetic resonance (EPR) parameters gives information which at the simplest level indicates the presence of a paramagnetic species but which can be sufficiently detailed to identify and characterize the adsorbed species. Measurements of the variation of the intensity of the signal with time can give kinetic data on reactions occurring at the surface. Although most of the EPR measurements have been carried out at low temperatures, there is evidence from the examples for some of the species that are stable at much higher temperatures and may play an important role in catalytic reactions.

Characterization and Reactivity of Molecular Oxygen Species on Oxide Surfaces

Exciton thermoreflectance of MgO and CaO

Discrete variational (DV) Xα cluster method is extended to ionic crystals with inclusion of the long-ranged Coulomb potential of the ions outside the cluster. As a typical example of partially ionic crystals, the surface and the bulk electronic structures of MgO crystal are calculated. The strong electric field, the reduction in the Madelung potential and the charge redistribution on the surface are found to be important factors for the formation of the surface state. Various features of the DV-Xα cluster method, such as the size and the shape dependence of the cluster, the effect of the exterior potential and so on are investigated.

Discrete Variational Xα Cluster Calculations. II. Application to the Surface Electronic Structure of MgO

Carbon monoxide MgO from dispersed solids to single crystals: a review and new advances

CaO and MgO reflectance spectra measurements at high resolution and at low temperature including exciton spectra at 25 K, obtaining fine structure

W. C. Walker

Papers

Exciton spectra of CaO and MgO.