{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70381"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70381","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Solid-State Nuclear Magnetic Resonance Studies of Quadrupolar Nuclei in Inorganic Systems (Nmr)","abstract":"Solid-state nuclear magnetic resonance (NMR) has been used to study a variety of systems of chemical, physical, and geological interest, including zeolites, metasilicates, and semiconductors. Among the nuclei studied were $\\sp $O, $\\sp{27}$Al, $\\sp{69}$Ga and $\\sp{71}$Ga. The general motivations for this research were to broaden solid-state NMR into new nuclei, especially quadrupolar nuclei, and to examine how quadrupolar NMR can be used as a structural tool. The research involved several applications, brief descriptions of which are presented below.","abstract_html":"Solid-state nuclear magnetic resonance (NMR) has been used to study a variety of systems of chemical, physical, and geological interest, including zeolites, metasilicates, and semiconductors. Among the nuclei studied were $\\sp $O, $\\sp{27}$Al, $\\sp{69}$Ga and $\\sp{71}$Ga. The general motivations for this research were to broaden solid-state NMR into new nuclei, especially quadrupolar nuclei, and to examine how quadrupolar NMR can be used as a structural tool. The research involved several applications, brief descriptions of which are presented below.","abstract_has_math":true,"creators":["Timken, Hye Kyung Cho"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T23:19:03Z","date_published":"2014-12-15T23:19:03Z","updated_at":"2026-07-22T22:26:02Z","subjects":["Chemistry, Physical"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8721769"],"render_values":[{"text":"(UMI)AAI8721769","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70381","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Timken, Hye Kyung Cho"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T23:19:03Z","10000-01-01","1987"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry, Physical"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/70381","(UMI)AAI8721769"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Solid-state nuclear magnetic resonance (NMR) has been used to study a variety of systems of chemical, physical, and geological interest, including zeolites, metasilicates, and semiconductors. Among the nuclei studied were $\\sp $O, $\\sp{27}$Al, $\\sp{69}$Ga and $\\sp{71}$Ga. The general motivations for this research were to broaden solid-state NMR into new nuclei, especially quadrupolar nuclei, and to examine how quadrupolar NMR can be used as a structural tool. The research involved several applications, brief descriptions of which are presented below.","Quadrupolar echo techniques were applied in order to resolve chemically non-equivalent sites in solids which have nearly identical chemical shifts. Oxygen-17 NMR studies of zeolites and related systems demonstrated that the $\\sp $O NMR spectra of these systems consist of resonances from chemically distinct oxygen species, Si ($\\sp $O) Si and Si ($\\sp $O) Al for aluminosilicates; Si ($\\sp $O) Si and Si ($\\sp $O) Ga for gallosilicates; and Al ($\\sp $O) P for the AlPO$\\sb{4}$ zeolite analogs. From $\\sp{69}$Ga and $\\sp{71}$Ga NMR studies of gallium analog zeolites we have characterized the framework gallium sites (Ga(OSi)$\\sb{4}$), and have obtained NMR parameters essentially by carrying out a "frequency dependence" study at one magnetic field strength by observing the different apparent chemical shifts of $\\sp{69}$Ga and $\\sp{71}$Ga. We have measured and interpreted the variable-temperature spin-lattice relaxation times (T$\\sb{1}$) of $\\sp{27}{\\rm Al}$ in zeolites. The major relaxation mechanism is due to the quadrupolar interaction. For hydrated zeolites, the motions of the hydrated water in zeolites gives rise to a fluctuating electric field gradient at the framework Al nuclear sites. From $\\sp $O NMR studies of a series of alkaline earth metasilicates, we have characterized the different oxygen sites encountered (one bridging oxygen and two distinct non-bridging oxygens). Finally, we have applied $\\sp{69}$Ga and $\\sp{71}$Ga NMR to a series of gallium-containing III-V semiconductors. By applying the magic-angle sample-spinning technique, we can selectively remove some specific linebroadening mechanisms and the contribution of each mechanism (dipolar, first-order and second-order quadrupolar, pseudodipolar, and exchange interaction) may be more accurately estimated.","Made available in DSpace on 2014-12-15T23:19:03Z (GMT). No. of bitstreams: 1 8721769.pdf: 6124738 bytes, checksum: ba5801badbd5278565130c41a2591a35 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 70547 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","213 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."]},{"key":"dc:title","label":"Title","values":["Solid-State Nuclear Magnetic Resonance Studies of Quadrupolar Nuclei in Inorganic Systems (Nmr)"]}]}],"canonical_facts":{"dc:creator":["Timken, Hye Kyung Cho"],"dc:date":["2014-12-15T23:19:03Z","10000-01-01","1987"],"dc:description":["Solid-state nuclear magnetic resonance (NMR) has been used to study a variety of systems of chemical, physical, and geological interest, including zeolites, metasilicates, and semiconductors. Among the nuclei studied were $\\sp $O, $\\sp{27}$Al, $\\sp{69}$Ga and $\\sp{71}$Ga. The general motivations for this research were to broaden solid-state NMR into new nuclei, especially quadrupolar nuclei, and to examine how quadrupolar NMR can be used as a structural tool. The research involved several applications, brief descriptions of which are presented below.","Quadrupolar echo techniques were applied in order to resolve chemically non-equivalent sites in solids which have nearly identical chemical shifts. Oxygen-17 NMR studies of zeolites and related systems demonstrated that the $\\sp $O NMR spectra of these systems consist of resonances from chemically distinct oxygen species, Si ($\\sp $O) Si and Si ($\\sp $O) Al for aluminosilicates; Si ($\\sp $O) Si and Si ($\\sp $O) Ga for gallosilicates; and Al ($\\sp $O) P for the AlPO$\\sb{4}$ zeolite analogs. From $\\sp{69}$Ga and $\\sp{71}$Ga NMR studies of gallium analog zeolites we have characterized the framework gallium sites (Ga(OSi)$\\sb{4}$), and have obtained NMR parameters essentially by carrying out a "frequency dependence" study at one magnetic field strength by observing the different apparent chemical shifts of $\\sp{69}$Ga and $\\sp{71}$Ga. We have measured and interpreted the variable-temperature spin-lattice relaxation times (T$\\sb{1}$) of $\\sp{27}{\\rm Al}$ in zeolites. The major relaxation mechanism is due to the quadrupolar interaction. For hydrated zeolites, the motions of the hydrated water in zeolites gives rise to a fluctuating electric field gradient at the framework Al nuclear sites. From $\\sp $O NMR studies of a series of alkaline earth metasilicates, we have characterized the different oxygen sites encountered (one bridging oxygen and two distinct non-bridging oxygens). Finally, we have applied $\\sp{69}$Ga and $\\sp{71}$Ga NMR to a series of gallium-containing III-V semiconductors. By applying the magic-angle sample-spinning technique, we can selectively remove some specific linebroadening mechanisms and the contribution of each mechanism (dipolar, first-order and second-order quadrupolar, pseudodipolar, and exchange interaction) may be more accurately estimated.","Made available in DSpace on 2014-12-15T23:19:03Z (GMT). No. of bitstreams: 1 8721769.pdf: 6124738 bytes, checksum: ba5801badbd5278565130c41a2591a35 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 70547 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","213 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."],"dc:identifier":["http://hdl.handle.net/2142/70381","(UMI)AAI8721769"],"dc:subject":["Chemistry, Physical"],"dc:title":["Solid-State Nuclear Magnetic Resonance Studies of Quadrupolar Nuclei in Inorganic Systems (Nmr)"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:02Z"}