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 669 for “"Ru"”.
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[Ru-POM] Photo-electrocatalysis
… photo-sensitation of polyoxometalate anions with Ruthenium polypyridyl cations has received intensive investigation as the excellent photoluminescence properties and stability of Ruthenium polypyridyl complexes in multiple redox states can be coupled to the POM in order to extend the absorbance …
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Improving Photocatalytic Hydrogen Production of Ru,Rh,Ru Supramolecular Complexes in Aerobic Aqueous Solutions
… photocatalysts of the architecture [{(TL)2Ru(BL)}2RhX2]5+ (BL=bridging ligand, TL=terminal ligand, X=halide) are among the highest reported in deoxygenated organic solvents, but do not function in air-saturated aqueous solution due to quenching of the metal-to-ligand charge transfer (MLCT) …
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Ru,Rh,Ru Supramolecular Photocatalysts within Nafion® Membranes: Ion-exchange, Photoelectrolysis and Electron Transfer Processes
… models. The trimetallic complex, [{(bpy)2Ru(dpp)}2RhBr2] 5+, is readily absorbed by ion exchange into Na+ -form Nafion® membranes under ambient conditions. The dimensions of three different isomers of the trimetallic complex are estimated to be: 23.6 Å × 13.3 Å × 10.8 Å, 18.9 Å × 18.0 Å × …
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Comparative Electrochemistry, Electronic Absorption Spectroscopy and Spectroelectrochemistry of the Monometallic Ruthenium Polypyridyl Complexes, [Ru(Bpy)(Dpb)2](Pf6)2, [Ru(Bpy)2(Dpb)](Pf6)2, [Ru(Bpy)2(Dpq)](Pf6)2, [Ru(Bpy)(Dpq)2](Pf6)2
The novel compound [Ru(bpy)(dpb)–(PFâ )â was synthesized, in a manner similar to the literature synthesis of [Ru(bpy)(dpq)â (PFâ )â . For the sake of completeness, the related analogs, [Ru(bpy)â (dpb)](PFâ )â , [Ru(bpy)â (dpq)](PFâ )â and [Ru(bpy)(dpq)â ](PFâ )â were also synthesized. Alumina …
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The AI-Pt-Ru ternary phase diagram
No abstract available.
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Kinetics of ketone hydrogenation over supported Ru catalysts
… of levulinic acid (LA) over supported Ru catalysts was carried out, in order to understand how to better design a hydrogenation catalyst for such biomass catalytic strategies. At temperatures representative of biomass processing, the reaction proceeds first through the reduction of the …
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Synthesis and Characterization of Pt-Ru-Sn Catalysts
<p>Magnesia-supported trimetallic Pt-Ru-Sn catalysts prepared through a cluster and a conventional synthetic route have been investigated in terms of their structural properties and their catalytic activity for the hydrogenation of citral and crotonaldehyde. FTIR results indicate that the majority …
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Ru(m)inations; A Project in San Lorenzo
I began with a place, the Roman ruin of San Lorenzo in Milan. This place has been a "provocateur," not an object or a set of parameters from which I responded. Architectural readings of the city are contaminated with foreshadowings or hints of what is yet to appear. One may read the city as "Janus" …
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Deposition and properties of Co- and Ru-based ultra-thin films
… both the liner layer(s) and the capping layer. Ruthenium has previously been considered as a material that could function as a single material liner, however its poor ability to prevent copper diffusion makes it incompatible with liner requirements. A recently described chemical vapor deposition …
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That's Ru-volting! how reality TV reimagines perceptions of American success
… of Americans experiencing success. RuPaul’s Drag Race is a prime example. The Logo TV reality show, devoted to finding “America’s Next Drag Superstar,” transforms the historically maligned drag queen from a hegemonic masculine failure into a celebrated superstar. Created, coproduced, …
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Compuestos organometálicos de Pt(II) y Ru(II) con el grupo electroactivo ferrocenilo
… y caracterización de especies de PtII y RuII con ligandos que contienen fragmentos CCFc como centros redox activos. Mediante el estudio de las propiedades electroquímicas se ha puesto de manifiesto la influencia tanto de los ligandos y metales que unen los grupos ferrocenilo, como la …
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Interactions of hydrogen with alkali promoted Ru/SiO2 catalysts: a proton NMR study
… has endeavored to characterize alkali promoted Ru/SiO[subscript]2 catalysts. Initial work investigated the role of hydrogen spillover to the silica support on the characterization of the active metal sites via a hydrogen chemisorption technique. A strongly bound component of spilled over …
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Preparation and characterisation of Pt-Ru/C catalysts for direct methanol fuel cells
… of methanol from the anode to the cathode, Ru dissolution and Ru crossover from the anode to the cathode. In addition, the DMFC has a high manufacturing cost due to expensive catalyst costs and other materials. Catalyst expenses are further increased by catalyst loading due to low activity …
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Ru-mediated ring-opening metathesis polymerization for the synthesis of complex polymer architectures
… use of highly active metal catalysts, such as Grubbs' first-generation catalyst [G1, (PCy3)2(Cl)2RuCHPh] and Grubbs' third-generation catalyst [G3, (H2IMes)(Cl)2(pyr)2RuCHPh], ROMP can exhibit living characteristics for some monomer classes, most commonly substituted norbornenes. The high …
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New Polyazine-Bridged Ru(II),Rh(III) and Ru(II),Rh(I) Supramolecular Photocatalysts for Water Reduction to Hydrogen Applicable for Solar Energy Conversion and Mechanistic Investigation of the Photocatalytic Cycle
… the design constraints of active dpp-bridged RuII,RhIII (dpp = 2,3-bis(2-pyridyl)pyrazine)) supramolecular photocatalysts for water reduction to H2 and provide mechanistic insights into the catalytic cycle. Two member of a new RuII,RhIII motifs with only one Rh-'Cl bond, …
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Vibrationally enhanced associative photodesorption of H2 (D2) from Ru(0001) : quantum and classical approaches
… of hydrogen, H$_2$, and deuterium, D$_2$, from a ruthenium metal surface. Many interesting features of this reaction were explored by experimentalists: (i) a huge isotope effect in the desorption probability of H$_2$ and D$_2$, (ii) the desorption yield increases non-linearly with the applied …
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Synthese und Anwendung von nicht-kovalent und kovalent immobilisierten Ru-Komplexen für die Olefinmetathese
Ziel dieser Arbeit war es, Ru-Komplexe aufbauend auf dem Hoveyda-Motiv zu entwickeln, die sich nach einfacher Abtrennung von den Produkten durch z. B. Filtration wiederverwenden lassen und nur ein geringes Ausbluten zeigen sollten. <br>Ausgehend von 4-Brombenzol wurde ein perfluormarkierter …
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Σύνθεση και Βιολογική Αξιολόγηση Νανοσωματιδίων Au@Ru με Έμφαση στη Βιοσυμβατότητα και Αντικαρκινική Δράση
… διμεταλλικών νανοσωματιδίων χρυσού–ρουθηνίου (Au@Ru NPs), καθώς και των μονομεταλλικών τους αντίστοιχων (Au NPs και Ru NPs), με στόχο πιθανές αντικαρκινικές εφαρμογές. Τα Au NPs συντέθηκαν με τροποποιημένη μέθοδο αντίστροφης Turkevich, τα Ru NPs παρασκευάστηκαν με χρήση αναγωγικού παράγοντα, ενώ …
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Supramolecular Ru II, Pt II Complexes Bridged by 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz)
… racemic compounds: a bimetallic complex, [(tpy)Ru(tppz)PtCl](PF₆)₃, and a trimetallic complex, [ClPt(tppz)Ru(tppz)PtCl](PF₆)₄, in solution and in the solid state, where tpy is 2,2':6',2''-terpyridine and tppz is 2,3,5,6-tetrakis(2-pyridyl)pyrazine. These two supramolecular assemblies display …
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Hemilabile Phosphorus Enamine/Imine Ligands And Their Application In Ru-Catalyzed Aqueous Hydration Of Nitriles
… were obtained. Tungsten tetracarbonyl and ruthenium arene complexes of these new water soluble phosphines were also synthesized. The ligands coordinated in a k2-P,N bidendate fashion to the metal centers to give new iminophosphine complexes. Upon coordination to the metal centers, the …
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