{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/84362"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/84362","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Nuclear Magnetic Resonance Under Extreme Conditions: High-Pressure NMR Probe Development, and NMR Applications to the Dynamics of Confined Liquids","abstract":"Dynamic NMR studies at ambient pressure were also perfonned on the polar fluids ethanol, 2,2,2-trifluoroethanol, propionic acid, and pentafluoropropionic acid confined to porous silica glasses with well-defined pore sizes. The $\\sp{13}$C NMR spin-lattice relaxation times were measured and analyzed in terms of the two-state-fast exchange model, which allows separation of the surface layer relaxation rates. The experiments showed that the hydrocarbon fluids form stronger hydrogen-bond interactions with the silica surface, and that confinement has little effect on the internal rotation of terminal -CF$\\sb3$ or -CH$\\sb3$ groups.","abstract_html":"Dynamic NMR studies at ambient pressure were also perfonned on the polar fluids ethanol, 2,2,2-trifluoroethanol, propionic acid, and pentafluoropropionic acid confined to porous silica glasses with well-defined pore sizes. The $\\sp{13}$C NMR spin-lattice relaxation times were measured and analyzed in terms of the two-state-fast exchange model, which allows separation of the surface layer relaxation rates. The experiments showed that the hydrocarbon fluids form stronger hydrogen-bond interactions with the silica surface, and that confinement has little effect on the internal rotation of terminal -CF$\\sb3$ or -CH$\\sb3$ groups.","abstract_has_math":true,"creators":["Ballard, Lance Edward Lynn"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Jonas, Jiri"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T22:14:06Z","date_published":"2015-09-25T22:14:06Z","updated_at":"2026-07-22T22:26:23Z","subjects":["Chemistry, Analytical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9737043"],"render_values":[{"text":"(MiAaPQ)AAI9737043","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/84362","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Jonas, Jiri"]},{"key":"dc:creator","label":"Author","values":["Ballard, Lance Edward Lynn"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T22:14:06Z","10000-01-01","1997"]},{"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, Analytical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/84362","(MiAaPQ)AAI9737043"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Dynamic NMR studies at ambient pressure were also perfonned on the polar fluids ethanol, 2,2,2-trifluoroethanol, propionic acid, and pentafluoropropionic acid confined to porous silica glasses with well-defined pore sizes. The $\\sp{13}$C NMR spin-lattice relaxation times were measured and analyzed in terms of the two-state-fast exchange model, which allows separation of the surface layer relaxation rates. The experiments showed that the hydrocarbon fluids form stronger hydrogen-bond interactions with the silica surface, and that confinement has little effect on the internal rotation of terminal -CF$\\sb3$ or -CH$\\sb3$ groups.","Made available in DSpace on 2015-09-25T22:14:06Z (GMT). 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The $\\sp{13}$C NMR spin-lattice relaxation times were measured and analyzed in terms of the two-state-fast exchange model, which allows separation of the surface layer relaxation rates. The experiments showed that the hydrocarbon fluids form stronger hydrogen-bond interactions with the silica surface, and that confinement has little effect on the internal rotation of terminal -CF$\\sb3$ or -CH$\\sb3$ groups.","Made available in DSpace on 2015-09-25T22:14:06Z (GMT). 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