{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70401"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70401","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"NMR Studies of Solid-Supercritical Fluid Mixtures and a New Technique for NMR Diffusion Measurements","abstract":"Solid solubilities of naphthalene in supercritical carbon dioxide have been measured near the upper critical end point of the binary mixture by using a novel, in situ NMR technique. The pressure-temperature trace of the solid-liquid-gas phase line that terminates at the upper critical end point was also determined. The results are discussed in terms of the supercritical solubility theory of Gitterman and Procaccia. The analysis correlates the composition and phase data.","abstract_html":"Solid solubilities of naphthalene in supercritical carbon dioxide have been measured near the upper critical end point of the binary mixture by using a novel, in situ NMR technique. The pressure-temperature trace of the solid-liquid-gas phase line that terminates at the upper critical end point was also determined. The results are discussed in terms of the supercritical solubility theory of Gitterman and Procaccia. The analysis correlates the composition and phase data.","abstract_has_math":false,"creators":["Lamb, Douglas Matt"],"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":2014,"date_issued":"2014-12-15T23:19:12Z","date_published":"2014-12-15T23:19:12Z","updated_at":"2026-07-22T22:26:02Z","subjects":["Chemistry, Physical"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8815376"],"render_values":[{"text":"(UMI)AAI8815376","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70401","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":["Lamb, Douglas Matt"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T23:19:12Z","10000-01-01","1988"]},{"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/2142/70401","(UMI)AAI8815376"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Solid solubilities of naphthalene in supercritical carbon dioxide have been measured near the upper critical end point of the binary mixture by using a novel, in situ NMR technique. The pressure-temperature trace of the solid-liquid-gas phase line that terminates at the upper critical end point was also determined. The results are discussed in terms of the supercritical solubility theory of Gitterman and Procaccia. The analysis correlates the composition and phase data.","The use of supercritical fluid solvents to obtain NMR line narrowing for solutes containing quadrupolar nuclei was investigated. It is shown that for certain solute-supercritical fluid systems linewidth improvements of two to six fold over organic solvents are possible.","A new technique for diffusion measurement by NMR using a fixed field gradient is described. The method makes use of a Bessel function fit analysis to the spin-echo signal in order to determine both the applied gradient and the diffusion coefficient simultaneously. Results of tests of the method are presented, and the utility of the technique is demonstrated.","An NMR study of the molecular motions of naphthalene in the naphthalene-supercritical carbon dioxide mixture was performed. Both the diffusion coefficient of naphthalene and the deuterium spin lattice relaxation time of d$\\sb8$-naphthalene have been measured. Data have been obtained over two distinct phase regions of the mixture. The results are analyzed using hydrodynamic theory through the Stokes-Einstein and Debye equations. Empirical modifications of these equations are necessary to represent the data.","Made available in DSpace on 2014-12-15T23:19:12Z (GMT). No. of bitstreams: 1 8815376.pdf: 2491674 bytes, checksum: 8482d575ef2113ab600119ab032ec1b6 (MD5) Previous issue date: 1988","Embargo set by: Seth Robbins for item 70567 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","83 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988."]},{"key":"dc:title","label":"Title","values":["NMR Studies of Solid-Supercritical Fluid Mixtures and a New Technique for NMR Diffusion Measurements"]}]}],"canonical_facts":{"dc:contributor":["Jonas, Jiri"],"dc:creator":["Lamb, Douglas Matt"],"dc:date":["2014-12-15T23:19:12Z","10000-01-01","1988"],"dc:description":["Solid solubilities of naphthalene in supercritical carbon dioxide have been measured near the upper critical end point of the binary mixture by using a novel, in situ NMR technique. The pressure-temperature trace of the solid-liquid-gas phase line that terminates at the upper critical end point was also determined. The results are discussed in terms of the supercritical solubility theory of Gitterman and Procaccia. The analysis correlates the composition and phase data.","The use of supercritical fluid solvents to obtain NMR line narrowing for solutes containing quadrupolar nuclei was investigated. It is shown that for certain solute-supercritical fluid systems linewidth improvements of two to six fold over organic solvents are possible.","A new technique for diffusion measurement by NMR using a fixed field gradient is described. The method makes use of a Bessel function fit analysis to the spin-echo signal in order to determine both the applied gradient and the diffusion coefficient simultaneously. Results of tests of the method are presented, and the utility of the technique is demonstrated.","An NMR study of the molecular motions of naphthalene in the naphthalene-supercritical carbon dioxide mixture was performed. Both the diffusion coefficient of naphthalene and the deuterium spin lattice relaxation time of d$\\sb8$-naphthalene have been measured. Data have been obtained over two distinct phase regions of the mixture. The results are analyzed using hydrodynamic theory through the Stokes-Einstein and Debye equations. Empirical modifications of these equations are necessary to represent the data.","Made available in DSpace on 2014-12-15T23:19:12Z (GMT). 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