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.
Results
Showing 1 to 11 of 11 for “"19F NMR spectroscopy"”.
-
The preparation and characterization of tungsten and molybdenum sulfide fluorides
… synthesized and characterized by vibrational and NMR spectroscopy. The [N(CH3)4][SSi(CH3)3] salt was used to prepare the new [N(CH3)4][WSF5] salt directly from WF6. Alternatively, [N(CH3)4][WSF5] was prepared by the reaction of WSF4 with [N(CH3)4][F]. Pure WSF4 was prepared via a facile new route …
-
Nuclear magnetic resonance studies of boron trihalide complexes of 1,1-BIS (dimethylamino) ethylene and related bases
… adducts of DME have been investigated by 1H and 19F NMR spectroscopy. Both nitrogen and the C-Q-H carbon of DME are possible donor a toms to boron trihal ides but complexation has been found to occur only at carbon of DME. The initial adduct acts as a Bronsted acid and gives up a proton to free …
-
Pushing the Limits of the Lithium Indicator Carbon Acidity Scale Using Cyclopentadiene Chemistry and 19F NMR Spectrometry
… cyclopentadiene and indene derivatives, using 19F NMR spectroscopy to determine the equilibrium constants of sequential acid-base reactions. This thesis describes the further extension of the SLI scale to ca. pK = −6. To achieve this result, a set of 11 tetrasubstituted cyclopentadienes were …
-
Characterisation of the conformational landscape of the β1-adrenergic receptor and development of a strategy towards NMR studies of the protease-activated receptor 1
… using solution state nuclear magnetic resonance (NMR) spectroscopy. The tβ1AR is a class A G-protein-coupled receptor (GPCR) and the human counterpart is an important drug target in diseases of the heart. In chapter 2, a wide range of constructs, labelling reagents and conditions were tested to …
-
Synthesis, Properties, and Reactivity of Pentafluorophenyl Substituted Cyclopentadienes and Their Transition Metal Complexes
… cyclopentadienes and indenes are measured using 19F NMR spectroscopy. The electron-withdrawing fluorinated aryl groups have a substantial acidifying effect. The identity and number of substituents (C6F5, C5F4N, CH3, and t-Bu), the position of the substituents on the cyclopentadiene, and the …
-
Probing Organometallic Reactions With 19F NMR
… the metallocene/MAO mixtures are analyzed using 19F NMR spectroscopy. Group 4 metallocene dimethides bearing pentafluorophenyl (C6F5) substituents were synthesized and treated with MAO in benzene-d6. 19F NMR spectroscopic analysis demonstrated reversible methide transfer to form "cation-like" …
-
Antimikrobielle Therapie der Hornhaut : die Pharmakokinetik in der lokalen Therapie und ihre Optimierung durch den Mikrotrepan; am Beispiel von Ciprofloxacin und PVP-Jod
… below. Methods: In the first part, we used NMR spectroscopy (nuclear magnetic resonance) to analyse drugs containing fluor and to detect them in the anterior segments of the eye. The antibiotic Ciprofloxacin served as example in this study. In the second part we examined the therapeutical …
-
Structural studies of supramolecular host-guest systems
… The complexes were further characterized using 19F/13C DP/MAS and CP/MAS solid-state NMR spectroscopy. The solution state complexes were prepared in D2O for structural characterization using 1H/19F NMR spectroscopy. The NMR studies were complemented using FT-IR, thermal analyses (DSC, and TGA), …
-
Flouride Ion Donor-Acceptr Properties of cis-OsO2F4 and Lewis Acid Properties of OsO3F2 and XeOF4
… X-ray crystallography and low-temperature Raman spectroscopy. The structure of the salt consists of a closely associated ion-pair in which a fluorine atom from the anion coordinates to the cation rendering the osmium atom pseudo-octahedral. Reaction of cis-OsO2F4 with the fluoride ion sources …
-
Exploring the Electrode-Electrolyte Interface of Electrically Conductive Layered Metal-Organic Frameworks with Nuclear Magnetic Resonance
… solid-state nuclear magnetic resonance (NMR) spectroscopy to study ion adsorption and the charging mechanisms of these materials. Further, to address a lack of feasibility studies for deployment of MOFs in supercapacitor electrodes, we conduct a Life-Cycle Assessment (LCA) against …
-
Syntheses and characterization of copper(I) complexes for study of dynamic supramolecular ring-chain equilibria and application as photoredox catalysts
… 3. The desired products were characterized by 1H NMR, 13C NMR and 19F NMR spectroscopy. The solid state structures of some ILs have been determined by single-crystal X-ray analysis. In the solid state structures, it has been observed that the size of the anion in the IL crystals of 3-10–3-12 …