{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/84143"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/84143","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Synthesis and Study of Dendrimers and Star Polymers Without Cores","abstract":"Dendrimers having 16, 24, 32, or 64 alkene groups were synthesized and intramolecularly cross-linked. The combined use of MALDI-TOF MS and SEC analysis of the resulting structures indicated that in each case, as the degree of dendrimer cross-linking increased, its radius of gyration (Rg) decreased linearly. Upon cross-linking of the dendrimer having 64 alkene groups, atomic force microscopy (AFM) data indicated that as the degree of cross-linking increased, the height of the resulting structure deposited on a mica surface increased linearly. These results were interpreted in terms of an increase in rigidity with cross-linking. In addition, smaller dendrons and a dendrimer having 16 alkene groups were cross-linked, and the resulting structures were analyzed by 1H NMR, x-ray crystallography, MALDI-TOF MS, and SEC to provide insight into the types of the cross-links that are preferred in the cross-linking process.","abstract_html":"Dendrimers having 16, 24, 32, or 64 alkene groups were synthesized and intramolecularly cross-linked. The combined use of MALDI-TOF MS and SEC analysis of the resulting structures indicated that in each case, as the degree of dendrimer cross-linking increased, its radius of gyration (Rg) decreased linearly. Upon cross-linking of the dendrimer having 64 alkene groups, atomic force microscopy (AFM) data indicated that as the degree of cross-linking increased, the height of the resulting structure deposited on a mica surface increased linearly. These results were interpreted in terms of an increase in rigidity with cross-linking. In addition, smaller dendrons and a dendrimer having 16 alkene groups were cross-linked, and the resulting structures were analyzed by 1H NMR, x-ray crystallography, MALDI-TOF MS, and SEC to provide insight into the types of the cross-links that are preferred in the cross-linking process.","abstract_has_math":false,"creators":["Beil, James Blystone"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Zimmerman, Steven C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T22:13:09Z","date_published":"2015-09-25T22:13:09Z","updated_at":"2026-07-22T22:26:22Z","subjects":["Chemistry, Organic"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3153245"],"render_values":[{"text":"(MiAaPQ)AAI3153245","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/84143","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Zimmerman, Steven C."]},{"key":"dc:creator","label":"Author","values":["Beil, James Blystone"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T22:13:09Z","10000-01-01","2004"]},{"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, Organic"]}]},{"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/2142/84143","(MiAaPQ)AAI3153245"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Dendrimers having 16, 24, 32, or 64 alkene groups were synthesized and intramolecularly cross-linked. The combined use of MALDI-TOF MS and SEC analysis of the resulting structures indicated that in each case, as the degree of dendrimer cross-linking increased, its radius of gyration (Rg) decreased linearly. Upon cross-linking of the dendrimer having 64 alkene groups, atomic force microscopy (AFM) data indicated that as the degree of cross-linking increased, the height of the resulting structure deposited on a mica surface increased linearly. These results were interpreted in terms of an increase in rigidity with cross-linking. In addition, smaller dendrons and a dendrimer having 16 alkene groups were cross-linked, and the resulting structures were analyzed by 1H NMR, x-ray crystallography, MALDI-TOF MS, and SEC to provide insight into the types of the cross-links that are preferred in the cross-linking process.","Made available in DSpace on 2015-09-25T22:13:09Z (GMT). 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The combined use of MALDI-TOF MS and SEC analysis of the resulting structures indicated that in each case, as the degree of dendrimer cross-linking increased, its radius of gyration (Rg) decreased linearly. Upon cross-linking of the dendrimer having 64 alkene groups, atomic force microscopy (AFM) data indicated that as the degree of cross-linking increased, the height of the resulting structure deposited on a mica surface increased linearly. These results were interpreted in terms of an increase in rigidity with cross-linking. In addition, smaller dendrons and a dendrimer having 16 alkene groups were cross-linked, and the resulting structures were analyzed by 1H NMR, x-ray crystallography, MALDI-TOF MS, and SEC to provide insight into the types of the cross-links that are preferred in the cross-linking process.","Made available in DSpace on 2015-09-25T22:13:09Z (GMT). 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