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 40 for “"trimetallic"”.
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Trimetallic gold silver copper nanorods for carbon dioxide reduction
AuAgCu trimetallic nanorods of varying sizes and elemental ratios were synthesized using a seed-mediated growth procedure. These three metals were of interest due to their respective metal nanorods’ tunable plasmonic and catalytic properties especially in photocatalysis. The synthesis was adapted …
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Chemical Reactivity and Regioselectivity of Trimetallic Nitride Endohedral Metallofullerenes
… in the fields of biomedicine and nanomaterials. Trimetallic nitride template endohedral metallofullerenes (TNT EMFs) are some of the most promising fullerene-based materials (e.g., as MRI and X-ray contrast agents) because of their high yields compared to classic endohedral metallofullerenes. …
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Rational Design of Trimetallic Electrocatalyst for Electrochemical Overall Water Splitting
… poor HER activities. In Chapter 3, we develop a trimetallic CoFeW film on Ni foam by hydrothermal deposition and subsequent thermal annealing process. The trimetallic CoFeW exhibits great HER activity (ƞ10=147 mV) due to the improved conductivity and increased electrochemical active surface area …
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Exohedral Functionalization and Applications of the Trimetallic Nitride Endohedral Metallofullerenes
… applications of the Sc₃N@C₈₀ and Sc₃N@C₇₈ trimetallic nitride endohedral metallofullerenes. In addition, this dissertation discusses miscellaneous research that is relevant to the aformentioned metallofullerenes and their applications, such as the discovery of a new cage isomer …
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Synthesis and Functionalizations of Trimetallic Nitride Template Endohedral Metallofullerenes (TNT-EMFs)
… addresses the synthesis of a new mix-metal trimetallic nitride template endohedral metallofullerene (TNT-EMF) and the functionalizations of M3N@C80 (M = Sc, Gd, Ho) under the high-speed vibration milling (HSVM) condition. In addition, this thesis discusses the internal motion of the cluster, …
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Synthesis, characterization and catalytic investigations of Pt-based binary (bimetallic) and ternary (trimetallic) nanoparticles
… novel Pt-based binary (bimetallic) and ternary (trimetallic) nanoparticles, containing nickel (Ni), cobalt (Co) and/or vanadium (V), are then described. The synthesis protocols for solution-grown colloidal nanoparticles all required the heat-up of a chemical mixture (of metal precursors, …
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Synthesis and reactivity studies of mono-, bi-, and trimetallic complexes supported by oxidatively-resistant polyanionic ligands
… mBDCA-5t-H₆, to support mono-, bi-, and trimetallic complexes are presented. Selective single metal ion insertion into the cryptand was achieved to generate the mono-Co(II) and Zn(II) complexes that contain proximal hydrogen-bonding networks enforced by the carboxamide N-H groups of the …
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Heteronuclear trimetallic polyazine complexes of iridium (III) or rhodium (III) as electrocatalysts for the reduction of CO2
The research investigations involved in this thesis were focused on the development of multimetallic systems to function as electrocatalysts for the reduction of CO₂.
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Polyazine-Bridged Ru(II),Pt(II) Trimetallic and Tetrametallic Supramolecular Complexes Exhibiting Unusual Excited State Dynamics Important in Catalysis and PDT Drug Development
… diverse polyazine-bridged Ru(II),Pt(II) trimetallic and tetrametallic supramolecular complexes and study the impact of component variation on the redox, spectroscopic, and excited state properties that influence photoinduced charged separation and multielectron reduction. These complexes …
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Ru,Rh,Ru Supramolecular Photocatalysts within Nafion® Membranes: Ion-exchange, Photoelectrolysis and Electron Transfer Processes
… molecular size with existing 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 …
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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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Design and Modification of Polyazine-Bridged Ru(II),Rh(III) Bimetallic and Trimetallic Supramolecular Complexes Applicable in Solar Energy Harvesting for the Photocatalytic Reduction of Water to Hydrogen
… architecture. Ru(II),Rh(III),Ru(II) trimetallics of the design [{(TL)₂Ru(dpp)}₂RhX₂](PF₆)₅ (TL = phen = 1,10-phenanthroline or Ph₂phen = 4,7-diphenyl-1,10-phenanthroline; dpp = 2,3-bis(2-pyridyl)pyrazine; X = Cl⁻ or Br⁻) covalently couple two Ru(II) LAs to a central Rh(III) electron …
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Supramolecular Ru II, Pt II Complexes Bridged by 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz)
… 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 remarkably different …
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Investigation of triphenylene-based radical-containing ligand bridges in mediating electronic spin coupling and sensing chemical analytes
… triphenylene). In the first part, a series of trimetallic complexes containing HXTP radical bridges are studied. Radical-mediated spin exchange between the metal centers, as well as the electronic delocalization across the HXTP ligands are investigated with combined crystallographic, …
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Manipulation and Characterization of Morphology and Composition in Mono- and Heterometallic Nanoparticles
… on branched NP morphologies with mono-, bi- and trimetallic compositions for applications in electrocatalytic oxygen reduction reaction (ORR). Monometallic Pt nanopods were achieved through simple high temperature polyol reduction, where the morphology could be controlled by the OA:OAm stabiliser …
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Synthesis and photophysical investigation of supramolecular complexes developed for photoinitiated electron collection
… the functioning of the {[(bpy)₂Ru(dpb)]₂IrCl₂}⁵⁺ trimetallic complex as a photochemical molecular device for photoinitiated electron collection was established. The interaction of the electron donor with the trimetallic complex was also investigated through a Stern-Volmer quenching study. To tune …
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Labile Ligand Variation in Polyazine-Bridged Ruthenium/Rhodium Supramolecular Complexes Providing New Insight into Solar Hydrogen Production from Water
… selection for photocatalyst design. New trimetallic complex [{(bpy)2Ru(dpp)}2Ru(OH)2](PF6)5 (bpy = 2,2'-bipyridine) was prepared for comparison to halide analogues [{(bpy)2Ru(dpp)}2RhX2](PF6)5 (X = Br- or Cl-). The synthesis of a halide-free supramolecule containing OH- ligands afforded …
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Design and Synthesis of Mixed-Metal Supramolecular Complexes Incorporating Specialized Light Absorbing Units to Investigate Processes Relevant to Catalyst Function
… center forming a LA subunit. Larger bi- and trimetallic complexes are formed by coupling an additional Ru(II), Rh(III), or Pt(II) metal center to an existing Ru(II) LA through a BL. Ru(II),Ru(II), Ru(II),Rh(III), and Ru(II),Pt(II) bimetallics of the design [(TL)2Ru(BL)Ru(TL)2](PF6)4, …
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Synthesis and biological evaluation of trimeric 2,5-disubstituted benzimidazoles and related trinuclear ruthenium(II) organometallic complexes
… multinuclear ruthenium compounds, specifically trimetallic ruthenium compounds. With this in mind, the purpose of this study was to synthesize and characterize a series of 2,5-disubstituted benzimidazole-based trimeric compounds and related trinuclear complexes bearing ruthenium(II) metal …
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Morphology Controlled Synthesis of Copper Based Multimetallic Nanostructures and Their Electrocatalytic Properties for Methanol Oxidation Reaction
… synthesis of Cu NM, Cu-based bimetallic and trimetallic nanostructures, and their electrocatalytic properties for methanol oxidation reaction (MOR). Copper nanomaterials (Cu NM) with specific surface facets can tailor their catalytic activity. Understanding reagents responsible for Cu NM …
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