{"id":{"repo_id":"uno","oai_identifier":"oai:scholarworks.uno.edu:td-1147"},"canonical_url":"https://search.dev.ndltd.org/etd/uno/oai:scholarworks.uno.edu:td-1147","repository":{"repo_id":"uno","name":"University of New Orleans","base_url":"https://scholarworks.uno.edu/do/oai/"},"display":{"title":"Oxidation Chemistry of Some Early Transition-Metal Layered Perovskites","abstract":"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.","abstract_html":"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 (&lt; 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.","abstract_has_math":false,"creators":["Ward, Karachie"],"institution":null,"degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Wiley, John B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005-05-21T07:00:00Z","date_published":"2005-05-21T07:00:00Z","updated_at":"2026-07-24T05:28:04Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarworks.uno.edu/td/143","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wiley, John B."]},{"key":"dc:creator","label":"Author","values":["Ward, Karachie"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarworks.uno.edu/td/143"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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."]},{"key":"dc:title","label":"Title","values":["Oxidation Chemistry of Some Early Transition-Metal Layered Perovskites"]}]}],"canonical_facts":{"dc:contributor":["Wiley, John B."],"dc:creator":["Ward, Karachie"],"dc:description.abstract":["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."],"dc:identifier":["https://scholarworks.uno.edu/td/143"],"dc:title":["Oxidation Chemistry of Some Early Transition-Metal Layered Perovskites"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."]},"updated_at":"2026-07-24T05:28:04Z"}