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 9 of 9 for “"Oxygen Activation"”.
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Halogen-elimination photochemistry and oxygen-activation chemistry of late transition-metal complexes
… In the latter sections of the thesis, the oxygen-activation and reduction chemistries of rhodium and iridium hydride complexes are highlighted. In Chapters 1 and 2, photochemical halogen elimination from a variety of late transition-metal complexes is described. Studies of …
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Distal hydrogen-bonding effects and cofacial bimetallic salen architectures for oxygen activation chemistry
… transfer chemistry of 0-0 bond forming and activation chemistry. The "Hangman" architecture is composed of hydrogen-bonding functionalities poised over a redox active manganese salophen or salen platform. The complexes proved to be proficient catalase mimics (disproportionation of hydrogen …
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Understanding and Controlling the Degradation of Nickel-rich Lithium-ion Layered Cathodes
… Overcoming the stability issues from oxygen activation in nickel-rich materials is one of the largest challenges facing the commercial incorporation of NMCs. This thesis focuses on, LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub> (NMC811). Using surface sensitive techniques, such as …
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Exploring reactivity and component interactions in Toluene/o-Xylene Monooxygenase from pseudomonas sp. OX1
… and Four-Component Bacterial Multicomponent Monooxygenases. Bacterial multicomponent monooxygenases (BMMs) catalyze oxidation of hydrocarbon substrates through activation of dioxygen. Each BMM utilizes a diiron active site housed within a catalytic hydroxylase protein. This diiron active site is …
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Enzymatic activation of cytochrome P-450(cam)
Cytochrome P-450$\sb{\rm cam}$, a camphor monoxygenase from Pseudomonas putida, has served as a model system for the entire family of the P-450s in exploring structure-function relationships, molecular recognition, substrate specificity, and oxygen activation. There are several universal features …
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Small-molecule activation chemistry catalyzed by proton-coupled electron transfer
… include water oxidation in photosynthesis and oxygen reduction in respiration. Despite the importance of PCET in such catalytic bond-making and bond-breaking reactions, the underlying mechanisms of coupled proton and electron transport in these processes is not well understood. To address …
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Understanding structure-function relations in heme-copper oxidase using myoglobin-based enzyme models
Heme-copper oxygen reductases (HCOs) are respiratory enzymes that utilize a heme-copper center to perform the four-electron reduction of oxygen to water. The HCOs share significant structural and sequence homology to another class of metalloenzyme, nitric oxide reductase (NOR), that in turn, …
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Bio-inspired iron complexes featuring secondary coordination sphere interactions: Ligand design strategies and dioxygen reactivity
The activation of dioxygen plays an important role in processes ranging from biological oxidation to energy storage and utilization. In Nature, metalloenzymes use complex architectures to promote these multi-electron and multi-proton reactions using first-row transition metal centers. Many enzymes …
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Fundamental studies on copper zeolites for catalytic NO x abatement
… ammonia (NH<sub>3</sub>), in the presence of oxygen (O<sub> 2</sub>) to form nitrogen (N<sub>2</sub>) and water (H<sub>2</sub>O). Copper containing zeolites show commercially viable SCR performance. Cu-SSZ-13 (CHA framework), a member of this family, is a preferred catalyst for SCR …