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 20 of 109 for “"imidazolium"”.
-
Heats of Dissolution of Several Imidazolium-Based Ionic Liquids into Low Dielectric Media
… long-lived ion pairs for several different imidazolium-based ILs dissolved in chloroform, as evidenced in prior research by the presence of two resonance sets in 1H NMR spectra.1 Specifically, it was shown that the variation of experimental conditions such as temperature and concentration …
-
Imidazolium-funktionalisierte Phosphine als ionische Fluessigkeiten und ihre Anwendung in der SILP-Katalyse
… mit einem Alkylierungsagens, 3-Methyl-Imidazoliumhalogenide hergestellt, die in 1-Position über einen Spacer noch mit einer Halogenfunktion ausgestattet sind. Durch eine weitere SN-Reaktion dieses Halogens mit einem Phosphid können so die Phosphino-funktionalisierten Imidazolium-Salze …
-
Nuclear Magnetic Resonance Studies of Imidazolium-Based Ionic Liquids and Garnet-Type Li7La3Zr2O12
… several NMR techniques are employed to study imidazolium-based ionic liquids and garnet-type inorganic materials. These are being studied due to their potential use as safer alternatives to organic solvent-based electrolytes in lithium-ion batteries. X-ray techniques have been used to explore …
-
Cation and Anion Transport in a Dicationic Imidazolium-Based Plastic Crystal Ion Conductor
… ionic plastic crystal (OIPC) 1,2-bis[N-(N\'-hexylimidazolium-d2(4,5))]C2H4 2PF6- in one of its solid plastic crystal phases by means of multi-nuclear solid-state (SS) NMR and pulsed-field-gradient (PFG) NMR. We quantify distinct cation and anion diffusion coefficients as well as the diffusion …
-
Synthesis and characterisation of CdS and PbS nanoparticles in an imidazolium based ionic liquid
… nanoparticles have been prepared using the imidazolium based ionic liquid surfactant as both the stabilizer and growth modifier. The structural and morphological properties of the as-prepared nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), …
-
Renewable imidazolium zwitterions as platform molecules for the synthesis of ionic liquids and materials
… simple and efficient synthesis of functionalised imidazolium zwitterionic compounds from renewable resources was developed based on a modified one-pot Debus-Radziszewski reaction. The combination of different carbohydrate-derived 1,2-dicarbonyl compounds and amino acids is a simple way to modulate …
-
Correlation of Aqueous Solubility and Anti-Cancer Activity of Novel Triazolium and Imidazolium Salts
<p>Novel triazolium, imidazolium, and benzimidazolium salts are known to possess anti-cancer properties and have potential as cancer therapeutics. This thesis describes the aqueous solubility and the differential activity of N,AT-bis-substituted-l,2,4-triazolium bromide salts and …
-
Amino acid-derived imidazolium salts: platform molecules for N-Heterocyclic carbene metal complexes and organosilica materials
… sustainable building-blocks, 1, 3-dicarboxylate imidazolium salts derived from amino acids were successfully modified to be suitable as N-Heterocyclic carbene (NHC) ligands within metal complexes. Complexes of Ag(I), Pd(II), and Ir(I) were successfully produced using known procedures using …
-
Interaction studies of imidazolium based ionic liquids with organic acids and acetophenone : thermodynamic, spectroscopic, and theoretical approaches
… or the hydrogen atoms attached to the imidazolium ring of the cation as well as the anion constituent, thus varying their structure. To use ILs as solvents, it is necessary to know how they behave in the presence of other chemicals, like conventional solvents such as alcohols or …
-
Interaction of methoxyethyl methyl imidazolium-based ionic liquids with uranium and its effect on bioreduction of uranium
… In this study, new MOEMIM (methoxyethyl methyl imidazolium)-based ionic liquids were synthesized. Their properties were characterized by UV-Vis spectroscopy (UV-vis), Fourier transform infrared spectroscopy (ETIR), mass spectroscopy (MS) and NMR (Nuclear magnetic resonance). The interaction …
-
Palladium-Imidazolium Carbene Catalyzed Heck Coupling Reactions and Synthesis of a Novel Class of Fluoroanthracenylmethyl PTC Catalysts
… paper reported by our research group the imidazolium-palladium carbene has proven to be highly efficient for the Suzuki-Miyaura cross couplings. The most active bis-2,6- diisopropylphenyl dihydroimidazolium chloride ligand 1 in that series together with palladium acetate were employed as …
-
Structural studies of imidazolium and phosphonium cations with aprotic hetero cyclic anions (AHAs) and investigation of electrochemical CO₂ reduction
… of properties. In this study, we have selected imidazolium and phosphonium cations with good fluidity and thermal stability, pairing them with AHAs with varying basicity and geometry. We investigated the effect of hydrogen bonding in the selected ILs on chemical and physical properties by …
-
Sum Frequency Generation Spectroscopy of Imidazolium-based Ionic Liquids with Cyano-functionalized Anions at Gas-Liquid and Solid-Liquid Interfaces
As essential media currently used in several technological applications, the accurate molecular level description of ionic liquids (ILs) at the gas-liquid interface is of utmost importance. The inherently surface-sensitive technique, sum frequency generation (SFG) spectroscopy, in combination with …
-
Synthesis and Properties of Ion-Containing Block and Segmented Copolymers and Their Composites
… room temperature ionic liquid, 1-ethyl-3-methylimidazolium ethylsulfate (EMIm ES), to investigate the influence of ionic liquid on physical properties, morphologies, and ionic conductivity. Results indicated that EMIm ES preferentially located in the sulfonated PEO soft phase, leading to …
-
Design, Synthesis and Self-Assembly of Polymeric Building Blocks and Novel Ionic Liquids, Ionic Liquid-Based Polymers and Their Properties
… by glass transition temperature changes. New imidazolium ionic liquid monomers and imidazolium based polymers were synthesized for potential applications in electroactive devices, such as actuators. Structure-property relationships for pendant imidazolium polyacrylates and main-chain …
-
Functional ionic liquids in crystal engineering and drug delivery
… and nifedipine were investigated using imidazolium ionic liquids. The supramolecular complex of sulfathiazole and phenobarbital with imidazolium ionic liquids and polymorphic change in chlorpropamide was achieved. The ionic liquids provides unique environment for the crystallisation. The …
Page 1 of 6