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 32 for “"Transition metal compounds"”.
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Catalysis by transition metal compounds
… from this study should be applicable to other transition metal compounds."
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Nuclear quadrupole coupling in transition metal compounds
… Resonance spectroscopy to the study of transition element compounds. Using a conventional noise controlled superregenerative spectrometer compounds of cobalt, copper and molybdenum have been investigated. Three biscobalt(tetracarbonyl) tin(II) compounds were investigated and the ⁵⁹Co …
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Structural Chemistry of Cesium Trihalo Transition-Metal Compounds
Made available in DSpace on 2014-12-10T23:01:22Z (GMT). No. of bitstreams: 1 7219869.pdf: 3313756 bytes, checksum: 0fcdce760656ff348069e2f26ad00bb0 (MD5) Previous issue date: 1972
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Point contact studies of rare earth-transition metal compounds
… the spin-dependent properties of rare earth-transition metal compounds and transition metal thin films and bi-layers. The transport spin polarisation of Cu, Co and Fe has been measured using point contact Andreev reflection (PCAR), and found to be in good agreement with previous results. In …
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A study of three transition metal compounds and their applications
… phenomenon, where the ferromagnetic (FM) metal order co-exists and competes with the charge-ordered (CO) insulator phase. High Pr doping will favor the CO order, leading a sharp FM to CO dominated phase transition around Pr concentration of 0.3 and above. Hydrostatic pressure favors FM …
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Preparation, characterisation, and reaction studies of Group IV-transition metal compounds
The compounds germylpentacarbonylmanganese, methylgermylpentacarbonylmanganese, and methylgermyltetracarbonylcobalt have been prepared by alkali-halide elimination reactions between the appropriate germyl halides and metal carbonyl anions. The two methyl derivatives were characterised by …
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Chemistry of highly reactive group 5 and 6 transition metal compounds
… the first [CCC] X₃-donor pincer ligand for a transition metal was synthesized by two consecutive cyclometalations of a terphenyl complex of the group 5 metal tantalum. Chapter 1 describes two new transformations that occur between W(PMe₃)₄(η²-CH₂PMe₂))H and haloarenes, namely the formation of …
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Effect of Transition Metal Compounds on the UV Degradation of Polymers
… systems initiated by hydroperoxides or carbonyl compounds. Oxygen absorption studies showed the nickel oxime and nickel dithiocarbamate complexes to impart a stability additional to UV screening in the hydroperoxide initiated photo-oxidation and only screening in the triplet initiated oxidant. On …
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Activity and Stability Design Principles of Transition Metal Compounds for Decarbonization
… is transforming earth-abundant molecules and compounds into value-added fuels, chemicals, and materials with electricity converted from solar and wind energy using electrolyzers. Moreover, as such an approach stores energy from intermittent sources in chemical bonds, renewable electricity can …
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Crystal Spectra and Optical Activity of Transition Metal Compounds With Trigonal Symmetry
Made available in DSpace on 2014-12-09T17:35:04Z (GMT). No. of bitstreams: 1 6503610.pdf: 4520079 bytes, checksum: 52d7ba6b8bf4ee0895b9c6a6e55b847d (MD5) Previous issue date: 1964
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Physical, electrical and electrochemical characterizations of transition metal compounds for electrochemical energy storage
… devices. In this dissertation we report four transition metal materials systems with potential applications in electrochemical energy storage. Nanoscale and nanostructured materials are expected to play important roles in energy storage devices because of their enhanced and sometimes unique …
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A Study of the Interaction of some cationic Transition-Metal compounds with Carbon Monoxide and Nucleophiles
… CO to give [RuCl(COOCH3J I (00)2^*13)2. The compounds [Ru(CO) 2 (PPh3 ) 2 r [BF4 ] 2.CH2C1 2 and [Ru(CO) 3 (PPh3 ) 2 ] [BP4 ] 2 effectively form cis-[Ru(COOCH3)2(CO)2(PPh3)2] by the reaction of CHsONa in the presence of CO at room temperature. This dialkoxycarbonyl compound preparation from …
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An Exploration of Bonding in V_1−x Mo_x O_2 (x ≤ 0.53) and Other Compounds
Transition metal solid-state compounds have received much attention due to their vast array of novel functional properties. However, their use is often impeded by an insufficient understanding of the structure-property relationship. This dissertation examines bonding in two families of transition …
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ORGANOMETALLIC CHEMISTRY FROM THE INTERACTING QUANTUM ATOM APPROACH
… inside IQA was implemented allowing the study of transition metal compounds with this techniques. Furthermore IQA concepts were joined with Ponèc’s DAFH (Domain Avaraged Fermi Hole) giving the so-called IQA-EDF-DAFH analysis (EDF= electron-number distribution function) which provide a complete …
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Characterization of phase transitions by the analysis of crystal structures
… of the mechanisms of solid-solid phase transitions are reported on basis of the exemplary characterization of the phase transition of the metalorganic compound Eu(SC36H49)2 and of the inorganic transition-metal compounds TiI3 and CrOCl. The phase transitions were surveyed temperature …
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Design and characterization of zeolite supported cobalt carbonyl catalysts
Transition metal compounds such as Co₂(CO)₈ have often been used to catalyze various organic reactions. Severe difficulties may be encountered when attempts are made to recover and separate the soluble catalysts. A heterogeneous system consisting of Co₂(CO)₈ impregnated on zeolites with faujasitic …
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Selective Labelling of Peptides with Organometallic Compounds - Chemical and Biological Characterization
The modification of peptides and proteins with transition metal compounds is a growing field of interest, since it provides biologically active substances with unique spectro-scopic properties, serving as valuable tools in diagnosis and therapy. In this work, new methods for the introduction of …
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Understanding Transition Metal Dissolution from Battery Materials with Solution NMR Methods
… Lithium-ion batteries commonly use lithium transition metal oxides as cathode materials, many of which can undergo dissolution of the transition metal(s) into the electrolyte solution. Transition metal dissolution can lead to cathode restructuring, electrolyte degradation, thickening of the …
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Macrocyclic chemistry: Part I - Characterization of a mixed-valence di-iron complex and synthesis of a new poly-iron complex. Part II - Synthesis, characterization of new diphosphoester macrocyclic polyethers
… Crown Aza and Crown ether. Crown Aza are compounds that have nitrogens as the hetero-atoms in the macrocycle. In the first aim, the 1 H NMR spectrum of strongly-coupled di-iron complexes shows 5 different conformations, but is unable to identify these conformers. Calculation using Density …
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