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Showing 1 to 13 of 13 for “"Diffusion NMR"”.
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Studies of Lung Micromechanics via Hyperpolarized 3He Diffusion NMR
… of lung ventilation, lung morphometry via gas diffusion NMR provides information about the size and shape of the microscopic airways that account for over 95% of the lung's airspace. Consequently, gas diffusion NMR provides an important new tool for investigating changes in lung microstructure …
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Self-assembly of synthetic and biological components in water using cucurbit[8]uril
… supramolecular self-assembly, and applied NMR techniques. Chapter 1 introduces the reader to chemical complexity, and how supramolecular chemists have advanced in their capability of assembling more complex molecular architectures. The discussion focusses particularly on self-assembly …
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Anomalous diffusion in anisotropic media
… was investigated by pulsed field gradient diffusion NMR and complementary deuterium line shape analysis. Restricted diffusion was studied in two lyotropic lamellar systems, the first consisting of crosslinked flat lamellae in anisotropic hydrogels and the second consisting of spherically …
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Understanding aggregation of solvating extractants in applied separations
… coordination sphere of the extracted complexes. Diffusion NMR spectroscopy was used to determine the sizes and interactions of colloidal TBP aggregates in 20% TBP samples containing nitric acid, zirconium, and uranium. The aggregate sizes calculated from diffusion experiments were similar to …
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Synthesis and Recognition Properties of Functionalized Nanomaterials From Pyridyl Urea Macrocycles
… complexation was also studied in solution via NMR titrations and diffusion NMR studies.</p> <p>This talk will also focus on the self-assembly of pyridyl bis-urea building into columns. Individual columns are closely packed into highly dense structures without any cavities. This seemingly …
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Synthetic and structural studies of Calix[4]pyrogallolarenes: towards biological applications
… and in-solution behaviour has been studied by diffusion NMR spectroscopy and single crystal X-ray diffraction. It has been found that calix nano-capsules can be formed by calix[4]pyrogallolarenes in polar protic solvents when the alkyl chain is substituted with bromine at its terminus. This is …
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13C PEG as an In Vivo Macromolecular Probe for MRI and Biophysical Studies of Detergent-Peptide and Detergent-Detergent Interactions using NMR
… of pegylated constituents is also possible using NMR spectroscopy. Using blood as a sample biological fluid, clearance profiles of both unlabeled and 13C labelled PEG, as well as a pegylated protein were determined in rats. The second part of this thesis describes biophysical interactions of …
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Controlling molecular interactions to define interfacial phenomena and structure
… foam. The main techniques used were tensiometry, diffusion NMR and small-angle neutron scattering (SANS). The experiments involved investigating the competitive interactions between Pluronic P123 and small molecule surfactants, SMS, (sodium dodecylsulfate, SDS or C12SO4Na, dodecyltrimethylammonium …
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Solid state NMR for advanced materials characterization
… design materials with improved properties. Spin-diffusion NMR represents an established method to investigate domain sizes and morphology of heterogeneous polymers. General analytical solutions were for the first time derived for an one-dimensional process in a model morphology system represented …
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Towards reversible mechanochemically triggered strengthening, toughening and assembly of soft materials
… that extend beyond color indication. 2D diffusion NMR is employed to gain a deeper understanding of the molecular mechanisms that result in metal-ion-mediated gelation of SP polymer solutions. A number of complexities are revealed, and a method for decoupling the effects of shape, size, …
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Diffusion and Relaxometry Studies in Mesoporous Systems using Nuclear Magnetic Resonance
The role of diffusion plays a crucial part in catalytic reactions by facilitating the transport of reactants to the catalysts' active sites. Numerous chemical processes involve species with branches, such as the hydroisomerisation of fuels, Low-Density Polyethylene (LDPE) production, and the …
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Nuclear Magnetic Resonance Studies of Electrode and Electrolyte Materials for Li-Ion Batteries
<p>In this thesis, Nuclear Magnetic Resonance (NMR) spectroscopic techniques are used to study lithium electrode and electrolyte materials for advanced rechargeable lithium ion batteries. Three projects are described in this thesis. The first involves <sup>23</sup>Na and <sup>37</sup>Al static and …
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Design and demonstration of a motional narrowing method to measure a low temperature 3He diffusion coefficient for a superfluid neutron electric dipole moment experiment
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms