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 11 of 11 for “"Rb+ and Cs+"”.
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Outer-core emission spectroscopy of the heavy alkalis and alkali-alkali metal alloys
… processes are reported for K (n=3), Rb (n=4), and Cs (n=5), both as pure metals and when alloyed in Li, Na, and each other. The results for pure Rb and Cs allow the first comparisons of emission profiles, core lifetimes, and phonon broadening widths through the series of alkali metals …
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Alkali-rare gas photodissociation lasers: applications to laser physics and atom-atom interactions
… as a simple platform with which to isolate and study atom-atom interactions and fundamental physical processes that are ill-understood or have never been investigated previously. Specifically, the minimum allowable energy separation between levels 2 and 3 in a three-level laser system has …
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Nuclear magnetic resonance study of promoted catalysis
… prepared by adding alkali metals (Na, K, Rb, or Cs) to silica supported Pt clusters. We have also examined the effect of the alkali metals on CO and C2H4 adsorbed on the Pt. The properties of the promoter were studied in samples con t a1. n1. ng 23N a. By 'performing a 23Na- 13C double …
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Synthesis and properties of novel cage-functionalized crown ethers and cryptands.
A novel cryptand was synthesized which contained a 3,5-disubstituted-4- oxahexacyclo[5.4.1.02,6.03,10.05,9.08,11] dodecane "cage" moiety. In alkali metal picrate extraction experiments the cryptand exhibited high avidity towards Rb+ and Cs+, when compared with the corresponding model compound. A …
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Nuclear magnetic resonance study of promoted catalysts
… prepared by adding alkali metals (Na, K, Rb, or Cs) to silica supported Pt clusters. We have also examined the effect of the alkali metals on CO and C$\sb{2}$H$\sb{4}$ adsorbed on the Pt. The properties of the promoter were studied in samples containing $\sp{23}$Na. By performing a …
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The synthesis and characterisation of pyrochlore frameworks
… with a<br/>focus on garnering a better understanding of the factors determining the formation and<br/>behavior of these materials. Extensive structural characterisation has been undertaken<br/>primarily using powder X-ray and powder neutron diffraction techniques to explore the<br/>subtle …
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Studies into the ion exchange and intercalation properties of AlH2P3O10•2H2O
… investigations performed into the ion exchange and intercalation properties of aluminium triphosphate, AlH\(_2\)P\(_3\)O\(_{10}\)•2H\(_2\)O (AlTP). Materials synthesised were characterised using a variety of techniques, including powder neutron and X-ray diffraction, Rietveld analysis, …
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Novel methods to predict solid-state material properties
… technology - from semiconductors in electronics to steel in buildings and superconductors in MRI machines. Theoretical understanding of the atomic-scale behaviour of these materials can be leveraged to design new materials with desirable properties. In this thesis, we investigate the …
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Trace element behaviour in a LCT-pegmatite with rare-element mineralization : the Luolamäki pegmatite, a case study
… was chosen due to the existing drill cores and its rare-element mineralization of pollucite, petalite and possibly rubicline.The drill cores were sampled and analysed with wave dispersive x-ray fluorescence (WD-XRF), electron probe microanalyzer (EPMA) and with laser ablation inductively …
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Elucidating the structures of ionic clusters, from ion-water complexes to ion-biomolecule-water complexes
"The competition and cooperation between various noncovalent interactions in hydrated ions and hydrated ion-biomolecule systems are systematically characterized and examined using infrared spectroscopy and various theoretical approaches. The Multiple Channel InfraRed PhotoDissociation spectroscopy …
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Slow Inactivation of Sodium Channels: Structural Clues and Disease Associations
… the inner pore by the intracellular III-IV Loop, and defects in fast inactivation gating are known to underlie certain forms of myotonia, periodic paralysis, epilepsy, and cardiac arrhythmias. The mechanism of slow inactivation and its relevance to human disease, on the other hand, are much less …