Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 94 for “"Solution state"”.
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Coordination Cages: Beyond The Solution State
… a diverse array of molecular guests in the solution state, from both organic and aqueous media. This thesis investigates the application of metal-organic coordination cages in the solid-supported physisorbed and neat liquid states and the host-guest chemistry of the resulting materials. This …
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Solution state aggregation and flow-induced alignment of conjugated polymers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Synthesis and solution state self-assembly of linear-dendritic block copolymers
Linear-dendritic block copolymers consisting of a poly(styrene) linear block and poly(amidoamine) dendrimer block were synthesized and examined for their ability to self-assemble in both aqueous environments and organic/aqueous mixtures. These polymers were shown to assemble into vesicle structures …
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Group 11 'Ate Bases: Towards an Understanding of Solid- and Solution-State Structures
… to CuCN in cuprate formation. In the solid state, a series of Lipshutz-type cuprates (TMP)2Cu(SCN)Li2(L) (L = Et2O, THF, THP) are revealed, whose molecular conformations are infuenced by the identity of the Lewis base. However, in benzene solution, in situ conversion of Lipshutz-type to …
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Use of solution-state nuclear magnetic resonance spectroscopy to determine the structures of medicinally relevant peptides and proteins
… described herein details various studies with solution-state nuclear magnetic resonance (NMR) spectroscopy to aid in the elucidation of structures of various medicinally relevant peptides. The first system studied was that of the prochlorosins, an unusual family of lantipeptides all modified to …
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Unique applications of dearomative strategies: I) arene-oxides/oxepines through a dearomative epoxidation of non-activated arenes Ii) arenophile-mediated dearomatization of pyridines Iii) solution-state electrochemical dearomatization of polystyrene
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Experimental spectroscopic and theoretical studies of amino acid derivatives
… as a weak, broad band at 1690 cm-1 in the solid state Raman spectrum; in the solution state Raman spectrum the amide I band is blue shifted, and presented at 1728 cm-1. The two different wavenumbers for C=O stretching vibrations, for both molecules, indicate that the two carboxylic acid groups …
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Studies on the preparation and characterization of novel water-soluble catalysts
Spin-lattice (T1) relaxation studies using solid-state and solution-state :31p nuclear magnetic resonance spectroscopy have proven to be a reliable procedure for determining the onset of a "liquid-like" character of the supported phase in a supported aqueous phase catalyst. It has also been shown …
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Studies on lignin biosynthesis and structure
… subsequent analysis of the root tissues by solid state ¹³C nuclear magnetic resonance (NMR) spectroscopy, it was possible to determine the bonding patterns of lignin in situ. The lignin component of each ¹³C feru1ic acid enriched root tissue was then isolated as its acetal derivative and analyzed …
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Crystal engineering approaches to solid-state pharmaceutical systems
… drug form moves beyond controlling the solid-state and actively manipulating it, via salt formation, co-crystal synthesis or inclusion complexation, for example. Presented in this work are three distinct approaches to the control and development of solid-state form of organic molecules and …
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Apparent dissolution rate enhancement of poorly-water soluble drugs by adsorption technique
… Most of the NCE’s are lipophilic and have dissolution rate issues. Low dissolution rate of the drugs result in poor bioavailability. To overcome poor bioavailability, an adsorption technique is developed to enhance the apparent dissolution rate of poorly-water soluble drugs. In this study, two …
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NMR-Based Characterization of Proteins: Structure, Dynamics and Binding Interfaces of Influenza A's M1
… therapeutic strategies. In this context, solution-state Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful analytical tool: it can be used to characterize molecular structure under conditions that resemble physiological environments, it allows the observation of dynamic processes …
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Mechanistic Aspects of Enantioselective Complexation
… esters and amides, amino alcohols and alcohols. Solution-state NMR evidence, including intermolecular nuclear Overhauser enhancements, and X-ray crystallographic data provide support for the primary chiral recognition mechanism.
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Phosphorus-31 NMR Spectroscopy of Parasitic Protozoa
… Cryptosporidium parvum. The unifying features of solution-state 31P NMR spectra of acid extracts of these parasites were high levels of pyrophosphate, and in most cases similarly high levels of the condensed inorganic phosphates: tri-, tetra- and pentapolyphosphate. Spectra were obtained at high …
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Complexation between cyclodextrins and phenylurea herbicides in solution and in the solid state
… and co-precipitation methods in the solid state while also determining complex formation of the same phenylureas in solution with selected cyclodextrins. The kneading experiments were carried out first to determine whether the phenylureas would complex in the solid-state. The phenylureas …
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The Effect of Ionomer Architecture on the Morphology in Gel State Functionalized Sulfonated Syndiotactic Polystyrene
… the reaction in both the heterogeneous gel-state to obtain blocky copolymers and in the homogeneous solution state to obtain randomly functionalized copolymers. In order to compare both the thermal properties and morphology of these two systems several sets of samples were prepared at …
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Synthetic Design of Multiphase Systems for Advanced Polymeric Materials
… of poly(ether ether ketone) (PEEK) through both solution-state and gel-state functionalization methods. The multiphase gel-state chemistry restricts functionalization to the amorphous regions of the semi-crystalline parent homopolymer and generates a copolymer with a blocky microstructure. …
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Poly(pyridinium salt)s exhibiting liquid-crystalline and light-emitting properties
… as well as light emitting properties. Both the solution-state and solid-state emission behavior of these synthesized materials were investigated. They possessed several emission peaks in their spectra ranging from 280 nm to about 550 nm. Some of these polymers were found to form …
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