{"id":{"repo_id":"unlv","oai_identifier":"oai:oasis.library.unlv.edu:rtds-2289"},"canonical_url":"https://search.dev.ndltd.org/etd/unlv/oai:oasis.library.unlv.edu:rtds-2289","repository":{"repo_id":"unlv","name":"University of Nevada - Las Vegas","base_url":"https://oasis.library.unlv.edu/do/oai/"},"display":{"title":"Characterization of 2-methyl-8-quinolinolato gallium (Iii) chelates","abstract":"We present a detailed photophysical (absorption and emission), thermal and X-ray absorption (NEXAFS) study of gallium (III) bis(2-methyl-8-quinolinolato) carboxylate (2Meq2GaOR) chelates, where OR = acetato (OAc), trifluoroacetato (OTF) and dimethylpropianato (ODMP). These materials are compared with aluminum (III) tris(8-quinolinolato) (Alq3) chelates. We show that regardless of changing the carboxylato ligand the 2Meq2 GaOR chelates have similar unoccupied (LUMO) states. This implies that charge injection should be constant in these materials when used as emitter materials in organic light emitting devices. We also present the first detailed evaluation in to the mer/fac isomerization of gallium (III) tris(2-methyl-8-quinolinolato) (2Meq3Ga) chelate in both solution and solid state, using 1H NMR and thermal studies. Unlike in Alq3, where the fac-isomer is not present in detectable amounts in a thin film, in 2Meq3Ga the fac-isomer is present approximately four times in excess. We infer that the mer-isomer interconverts to the fac-isomer in the solid state and in the gas phase.","abstract_html":"We present a detailed photophysical (absorption and emission), thermal and X-ray absorption (NEXAFS) study of gallium (III) bis(2-methyl-8-quinolinolato) carboxylate (2Meq2GaOR) chelates, where OR = acetato (OAc), trifluoroacetato (OTF) and dimethylpropianato (ODMP). These materials are compared with aluminum (III) tris(8-quinolinolato) (Alq3) chelates. We show that regardless of changing the carboxylato ligand the 2Meq2 GaOR chelates have similar unoccupied (LUMO) states. This implies that charge injection should be constant in these materials when used as emitter materials in organic light emitting devices. We also present the first detailed evaluation in to the mer/fac isomerization of gallium (III) tris(2-methyl-8-quinolinolato) (2Meq3Ga) chelate in both solution and solid state, using 1H NMR and thermal studies. Unlike in Alq3, where the fac-isomer is not present in detectable amounts in a thin film, in 2Meq3Ga the fac-isomer is present approximately four times in excess. We infer that the mer-isomer interconverts to the fac-isomer in the solid state and in the gas phase.","abstract_has_math":false,"creators":["Nanayakkara, Sanjini Ushika"],"institution":"University of Nevada, Las Vegas","degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Linda S. Sapochak"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001-01-01T08:00:00Z","date_published":"2001-01-01T08:00:00Z","updated_at":"2026-07-24T05:25:18Z","subjects":[],"languages":["English"],"rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://oasis.library.unlv.edu/rtds/1290"],"render_values":[{"text":"https://oasis.library.unlv.edu/rtds/1290","href":"https://oasis.library.unlv.edu/rtds/1290","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.25669/17vq-bj0e","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Linda S. Sapochak"]},{"key":"dc:creator","label":"Author","values":["Nanayakkara, Sanjini Ushika"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["University of Nevada, Las Vegas"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"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":["Master of Science (MS)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.25669/17vq-bj0e","https://oasis.library.unlv.edu/rtds/1290","https://oasis.library.unlv.edu/context/rtds/article/2289/viewcontent/uc.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["We present a detailed photophysical (absorption and emission), thermal and X-ray absorption (NEXAFS) study of gallium (III) bis(2-methyl-8-quinolinolato) carboxylate (2Meq2GaOR) chelates, where OR = acetato (OAc), trifluoroacetato (OTF) and dimethylpropianato (ODMP). These materials are compared with aluminum (III) tris(8-quinolinolato) (Alq3) chelates. We show that regardless of changing the carboxylato ligand the 2Meq2 GaOR chelates have similar unoccupied (LUMO) states. This implies that charge injection should be constant in these materials when used as emitter materials in organic light emitting devices. We also present the first detailed evaluation in to the mer/fac isomerization of gallium (III) tris(2-methyl-8-quinolinolato) (2Meq3Ga) chelate in both solution and solid state, using 1H NMR and thermal studies. Unlike in Alq3, where the fac-isomer is not present in detectable amounts in a thin film, in 2Meq3Ga the fac-isomer is present approximately four times in excess. We infer that the mer-isomer interconverts to the fac-isomer in the solid state and in the gas phase."]},{"key":"dc:format","label":"Dc Format","values":["pdf"]},{"key":"dc:title","label":"Title","values":["Characterization of 2-methyl-8-quinolinolato gallium (Iii) chelates"]}]}],"canonical_facts":{"dc:contributor":["Linda S. Sapochak"],"dc:creator":["Nanayakkara, Sanjini Ushika"],"dc:description.abstract":["We present a detailed photophysical (absorption and emission), thermal and X-ray absorption (NEXAFS) study of gallium (III) bis(2-methyl-8-quinolinolato) carboxylate (2Meq2GaOR) chelates, where OR = acetato (OAc), trifluoroacetato (OTF) and dimethylpropianato (ODMP). These materials are compared with aluminum (III) tris(8-quinolinolato) (Alq3) chelates. We show that regardless of changing the carboxylato ligand the 2Meq2 GaOR chelates have similar unoccupied (LUMO) states. This implies that charge injection should be constant in these materials when used as emitter materials in organic light emitting devices. We also present the first detailed evaluation in to the mer/fac isomerization of gallium (III) tris(2-methyl-8-quinolinolato) (2Meq3Ga) chelate in both solution and solid state, using 1H NMR and thermal studies. Unlike in Alq3, where the fac-isomer is not present in detectable amounts in a thin film, in 2Meq3Ga the fac-isomer is present approximately four times in excess. We infer that the mer-isomer interconverts to the fac-isomer in the solid state and in the gas phase."],"dc:format":["pdf"],"dc:identifier":["10.25669/17vq-bj0e","https://oasis.library.unlv.edu/rtds/1290","https://oasis.library.unlv.edu/context/rtds/article/2289/viewcontent/uc.pdf"],"dc:language":["English"],"dc:publisher":["University of Nevada, Las Vegas"],"dc:rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Characterization of 2-methyl-8-quinolinolato gallium (Iii) chelates"],"dc:type":["Text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T05:25:18Z"}