Date of Award
8-2006
Degree Type
Thesis
Degree Name
M.S.
Degree Program
Chemistry
Department
Chemistry
Major Professor
Wiley, John
Second Advisor
Stevens, Edwin
Third Advisor
Tarr, Matthew
Abstract
Alkali metal halide layers were constructed within Dion-Jacobson (DJ) layered perovskites by a two-step sequential intercalation method. Reductive intercalation with an alkali metal, followed by oxidative intercalation with chlorine gas, leads to the formation of compounds of the general formula, (A2Cl)LaNb2O7 (A = Rb, Cs). Rietveld refinement of X-ray powder diffraction data shows that an alkali metal halide layer is formed between the perovskite blocks. The alkali metal cation is eight-coordinate with 4 oxygens from the perovskite layer and 4 chlorides from the new halide layer; this environment is similar to cesium in the CsCl structure. Thermal analysis indicates that these are low-temperature phases where decomposition begins below 200°C. Details on the synthesis and characterization of this set of compounds are presented and the general utility of this approach discussed.
Recommended Citation
Zhang, Xiao, "Building Metal-Anion Layers within a Preovskite Host" (2006). University of New Orleans Theses and Dissertations. 415.
https://scholarworks.uno.edu/td/415
Rights
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