Date of Award
Wiley, John B.
Early transition-metal oxyhalides, (MCl)LaNb2O7 (M = V, Cr) have been prepared by ion exchange of layered perovskite hosts, ALaNb2O7 (A = Li, Rb), with anhydrous metal halides, MCl2. These compounds contain low-valent metals (M2+) that are receptive to oxidation. Thermogravimetric analysis (TGA) shows oxygen uptake at low temperatures (< 500 °C) and subsequent X-ray powder diffraction indicates that the host structure is maintained upon oxidation. Also through EDAX of the starting material and products, it has been found that there is a loss of chlorine upon oxidation. Thorough characterization of oxidation products will be presented and the ramifications of this chemistry on low-temperature topotactic formation of metal-oxide layers within perovskite hosts will be discussed.
Ward, Karachie, "Oxidation Chemistry of Some Early Transition-Metal Layered Perovskites" (2005). University of New Orleans Theses and Dissertations. 143.