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dc.contributor.supervisor Hazendonk, Paul
dc.contributor.supervisor Gerken, Michael
dc.contributor.author Dutta Majumdar, Rudraksha
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2016-06-17T17:32:04Z
dc.date.available 2016-06-17T17:32:04Z
dc.date.issued 2015
dc.identifier.uri https://hdl.handle.net/10133/4526
dc.description.abstract The molecular and aggregate structure of asphaltenes derived from oil-sands bitumen, heavy black-oil and coal, and their aggregation behavior, have been studied comprehensively using solution- and solid-state nuclear magnetic resonance (NMR) spectroscopic techniques. It is shown using solution-state relaxation and 2D correlation methods, and cross-polarization-based solid-state techniques that the “island” model is the predominant architecture for asphaltenes derived from Athabasca oil-sands bitumen. Asphaltenes derived from different petroleum and coal sources are compared, and it is shown that alkyl sidechains play a significant role in asphaltene aggregation. The average asphaltene molecule is shown to be larger than previously posited, likely possessing pendant aromatic rings. The very first experimental evidence for alkyl groups intercalated between asphaltene aromatic sheets is presented. Finally, ultrafast magic angle spinning solid-state NMR experiments were used to achieve unprecedented resolution in the solid-state 1H NMR spectrum, allowing for the observation and relaxation measurements of otherwise obscure signals. en_US
dc.language.iso en_CA en_US
dc.publisher Lethbridge, Alta : University of Lethbridge, Dept. of Chemistry and Biochemistry en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Spectroscopy en_US
dc.subject Nuclear magnetic resonance spectroscopy en_US
dc.subject Petroleum en_US
dc.subject Solid-state NMR en_US
dc.subject Asphaltenes en_US
dc.title A nuclear magnetic resonance spectroscopic investigation of the molecular structure and aggregation behavior of asphaltenes en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Chemistry and Biochemistry en_US
dc.degree.level Ph.D en_US
dc.proquest.subject 0486 en_US
dc.proquest.subject 0494 en_US
dc.proquest.subject 0765 en_US
dc.proquestyes Yes en_US
dc.embargo.start 2015-12-15
dc.embargo.end 2016-06-14
dc.embargo Yes en_US


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