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 8 of 8 for “"ligand effect"”.
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Ligand Effect on Gold Nanomolecules Demonstrated Using Aliphatic, Aromatic and Bulky Thiolate Ligands
… (n) and thiolate (-SR, R-hydrocarbon chain) ligands (m) with molecular formula of the form [Aun(SR)m]. AuNMs are made of a gold core protected by a thiolate-monolayer and possess size-dependent properties conferred by quantum confinement. Atomic precision has been achieved in the 1-3 nm range …
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Metal-support interactions on Fe-based Fischer-Tropsch catalysts
… 1984; Tauster, 1987]. The second theory is ‘the ligand effect’. With this hypothesis, it is proposed that the development of chemical bonds at the interface between the active metal and the support material is responsible for the altered catalytic behavior in supported catalysts [Qing et al., …
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Electrocatalysis in Alkaline Media: Mechanistic Studies of Fuel Cell Reactions on Well-Defined Model Catalysts
… methanol dehydrogenation through two distinct ligand effects: it increases the intrinsic dehydrogenation activity of adjacent Pt sites, and it causes CO to diffuse away from these active sites, decreasing the CO poisoning effect. A Ru ligand effect also enhances CO oxidation by weakening the …
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Characterizations of Gold Complexes and Mechanism of its Usage in π-bond Activation Reactions
… are still lacking. Alternatively, “silver effect” is an interesting topic in gold chemistry, which means that silver may be involved in some gold-catalyzed reactions. So we focus on the ligand effect of gold complex and their roles in gold-catalyzed reactions.
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Investigation of aryldimethylsilanolates in palladium-catalyzed cross-coupling reactions and development of chiral bis-hydrazone ligands for asymmetric aryl-aryl couplings
… route to access a number of chiral bis-hydrazone ligands featuring a 2,5-diarylpyrrolidine moiety. This endeavor enables systematic investigation of the ligand effect on the reactivity and enantioselectivity of the reaction. The origin of the chiral induction has been rationalized through …
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Bulky Thiolated Gold Nanomolecules: Synthesis, Characterization, Optical Properties, and Atomic Structure
… a distinct number of gold atoms and thiolate ligands, Aux(SR)y, with unique spectroscopic, electrochemical, and chiral properties which are dependent on “x” and “y”. The properties of NMs are dictated by the type of capping ligand. The overall structure, size, surface percentage of ligands, …
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Understanding the catalytic activity of oxides through their electronic structure and surface chemistry
… structure, interfacial charge transfer (the "ligand" effect), strain, and crystallographic orientation. In addition, these well-defined surfaces allow spectroscopic examinations of their chemical speciation in an aqueous environment by using ambient pressure X-ray photoelectron spectroscopy. …
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Direct oxidation of methane to methanol
… is investigated for a Rh@ZSM-5 catalyst. The effect of molecules coordinating to the single atom centre on the reaction mechanism is explored. CO has a considerable effect as a ligand, explaining the experimental requirement for CO to have a trace presence in the system. Despite water also …