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 14 of 14 for “"metal charge transfer"”.
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Cyanide-bridged polynuclear complexes
… three mixed valent dinuclear complexes display metal- metal charge transfer (MMCT) bands in the visible region. Some of MMCT properties in the complexes have been analyzed. The cyanide-bridged trans and cis trinuclear complexes with a M’-CN-M-NC-M’ framwork were synthesized and determined by IR, …
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LUMINESCENT 2D COORDINATION NETWORKS (CNS): STRUCTURAL AND EXFOLIATION STUDIES
… (CPs), crystalline, porous materials composed of metal ions or clusters bridged by organic ligands, have garnered significant attention. This is largely due to their structural versatility, tunable properties, and a wide range of applications, including gas adsorption and separation, sensing, drug …
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Halogen-elimination photochemistry and oxygen-activation chemistry of late transition-metal complexes
… chemistry are studied on mono- and bimetallic late transition-metal platforms. In the early chapters, studies of photochemical halogen elimination, the key energy-storing step in photocatalytic hydrogen production from HX (X = Cl, Br), are described. In the latter sections of the …
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A Radical Approach to Photochemical Transformations Using Earth-Abundant Metals
… heavily relies on noble-metal based, coordinatively-saturated mononuclear photoactive complexes to perform a bimolecular outer-sphere single electron transfer (OSET) process for the generation of open-shell radical species. While powerful, the efficiency of this approach …
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Generation of Alkyl Radicals Via C-H Functionalization and Halogen Atom Transfer Processes
… is C-H bond functionalization via hydrogen-atom-transfer (HAT). HAT processes have been used as an effective approach for selectively activating C-H bonds via radical pathways. The other strategy to explore the generation of alkyl radicals is C-X bond functionalization via halogen-atom-transfer …
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Ultrafast electron transfer and intersystem crossing in bimetallic molecules
… electron spin is an important topic in electron transfer (ET). Coupling between the electronic, spin, and nuclear degrees of freedom play an important role in driving ET and intersystem crossing (ISC) on the ultrafast timescale. In this thesis, ultrafast optical and X-ray techniques are used to …
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Ultrafast extreme ultraviolet spectroscopy of transition metal dithiolate coordination complexes
… as a tool to interrogate the evolution of the metal center in a series of transition metal dithiolate complexes. The behavior of these molecules after absorption of light has implications for the development of catalysts and photosensitizers using earth-abundant transition metals. The cobalt …
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The Synthesis and Photophysical Properties of New Polymetallic Complexes Designed for Use in Photoinitiated Electron Collection
… was to develop stereochemically defined multimetallic systems for use as light absorbers and electron donor / light absorber dyads in photoinitiated electron transfer and electron collection. The basis for the stereochemical control was provided by the symmetric bridging ligands …
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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
… from their emissive Ru(dπ)-'dpp(π*) 3MLCT (metal-to-ligand charge transfer) excited states at room temperature. The population of a low-lying 3MMCT (metal-to-metal charge transfer) ES (excited state) from the 3MLCT ES contributed to the weak emission, indicating an important intramolecular …
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Synthesis and Study of Polyazine Bridged Mixed Metal Dyads: Electrochemical, Photophysical, and Photochemical Properties of a New Supramolecular Architecture
A series mixed metal supramolecular complexes were synthesized and studied by electrochemistry, photophysics and photochemistry. The complexes consisted of a single RuII or OsII polyazine light absorber bound to a cis-RhIIICl2 moiety through a polyazine bridging ligand. A related class of …
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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
… this research was to develop a series of mixed-metal supramolecular complexes through systematic component variation to better understand the role of structural modification on basic chemical and photochemical properties including photocatalysis of H₂O to H₂. Varying bidentate polypyridyl …
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The Design, Synthesis and Study of Mixed-Metal Ru,Rh and Os, Rh Complexes with Biologically Relevant Reactivity
A series of mixed-metal bimetallic complexes [(TL)2M(dpp)RhCl2(TL)]3 (M = Ru and Os, terminal ligands (TL) = phen, Ph2phen, Me2phen and bpy, terminal ligands (TL) = phen, bpy and Me2bpy ), which couple one Ru or Os polyazine light absorber (LA) to a cis-RhIIICl2 center through a dpp bridging ligand …
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Design and Synthesis of Mixed-Metal Supramolecular Complexes Incorporating Specialized Light Absorbing Units to Investigate Processes Relevant to Catalyst Function
… this research was to develop a series of mixed-metal supramolecular complexes with specialized light absorbing units to probe perturbation of excited-state properties by ligand deuteration and long-term complex stability via racemization of initially enantiopure light absorbing subunits. Varying …
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Development & characterization of bio-inspired earth-abundant metal systems and extreme ultraviolet spectroscopy of precious metal photocatalysts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01