{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25233"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25233","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Nuclear magnetic resonance study of the bonding of carbon monoxide to palladium and platinum surfaces","abstract":"The 13c and 17o NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low temperatures, the 13c resonance of CO on Pd is centered at 540 ppm down field from the 13 C resonance of tetramethylsilane (TMS). The line position is interpreted as the sum of a chemical shift of 230 ppm, typical of CO in transition metal carbonyls, and a Knight shift of 310 ppm. The 13c lineshape and spin lattice relaxation time T1 were measured from 77 K to 400 K. The temperature dependence of the T1 is used to confirm the existence of a Knight shift. From the motional narrowing of the NMR line a diffusion energy of 6+2 kcal/mol for CO on the Pd surface is deduced. A C-0 boo:i length of 1.20+.03 A for CO chemisorbed on Pd was measured using a spin echo double resonance (SEOOR) experiment observing the 170 NMR.","abstract_html":"The 13c and 17o NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low temperatures, the 13c resonance of CO on Pd is centered at 540 ppm down field from the 13 C resonance of tetramethylsilane (TMS). The line position is interpreted as the sum of a chemical shift of 230 ppm, typical of CO in transition metal carbonyls, and a Knight shift of 310 ppm. The 13c lineshape and spin lattice relaxation time T1 were measured from 77 K to 400 K. The temperature dependence of the T1 is used to confirm the existence of a Knight shift. From the motional narrowing of the NMR line a diffusion energy of 6+2 kcal/mol for CO on the Pd surface is deduced. A C-0 boo:i length of 1.20+.03 A for CO chemisorbed on Pd was measured using a spin echo double resonance (SEOOR) experiment observing the 170 NMR.","abstract_has_math":false,"creators":["Shore, Susan Eileen"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Slichter, C.P."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-02T17:57:17Z","date_published":"2011-06-02T17:57:17Z","updated_at":"2026-07-22T22:25:24Z","subjects":["Nuclear magnetic resonance (NMR)","carbon monozide","palladium sufaces","platinum surfaces","chemisorbed"],"languages":["en"],"rights":["1986 Susan Eileen Shore"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["994637"],"render_values":[{"text":"994637","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25233","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Slichter, C.P."]},{"key":"dc:creator","label":"Author","values":["Shore, Susan Eileen"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-02T17:57:17Z","1986"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Nuclear magnetic resonance (NMR)","carbon monozide","palladium sufaces","platinum surfaces","chemisorbed"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1986 Susan Eileen Shore"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["994637","http://hdl.handle.net/2142/25233"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The 13c and 17o NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low temperatures, the 13c resonance of CO on Pd is centered at 540 ppm down field from the 13 C resonance of tetramethylsilane (TMS). The line position is interpreted as the sum of a chemical shift of 230 ppm, typical of CO in transition metal carbonyls, and a Knight shift of 310 ppm. The 13c lineshape and spin lattice relaxation time T1 were measured from 77 K to 400 K. The temperature dependence of the T1 is used to confirm the existence of a Knight shift. From the motional narrowing of the NMR line a diffusion energy of 6+2 kcal/mol for CO on the Pd surface is deduced. A C-0 boo:i length of 1.20+.03 A for CO chemisorbed on Pd was measured using a spin echo double resonance (SEOOR) experiment observing the 170 NMR.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T17:57:17Z No. of bitstreams: 1 1986_shore.pdf: 4878926 bytes, checksum: acda6449cc75409a2090ba001dd57d10 (MD5)","Made available in DSpace on 2011-06-02T17:57:17Z (GMT). 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The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low temperatures, the 13c resonance of CO on Pd is centered at 540 ppm down field from the 13 C resonance of tetramethylsilane (TMS). The line position is interpreted as the sum of a chemical shift of 230 ppm, typical of CO in transition metal carbonyls, and a Knight shift of 310 ppm. The 13c lineshape and spin lattice relaxation time T1 were measured from 77 K to 400 K. The temperature dependence of the T1 is used to confirm the existence of a Knight shift. From the motional narrowing of the NMR line a diffusion energy of 6+2 kcal/mol for CO on the Pd surface is deduced. A C-0 boo:i length of 1.20+.03 A for CO chemisorbed on Pd was measured using a spin echo double resonance (SEOOR) experiment observing the 170 NMR.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T17:57:17Z No. of bitstreams: 1 1986_shore.pdf: 4878926 bytes, checksum: acda6449cc75409a2090ba001dd57d10 (MD5)","Made available in DSpace on 2011-06-02T17:57:17Z (GMT). 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