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 145 for “"Metal organic frameworks (MOFs)"”.
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Hydrogen physisorptive storage in metal-organic frameworks (MOFs)
… study investigated the storage of hydrogen using metal-organic frameworks (MOFs). MOFs are a class of porous inorganic-organic crystalline materials that store hydrogen by adsorption. What makes MOFs such an attractive option for hydrogen storage is that they have exceptionally high surface areas …
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Sorption, Transport and Gas Separation Properties of Zn-Based Metal Organic Frameworks (MOFs) and their Application in CO₂ Capture
… favorable kinetic pathways for CO₂ separation. MOFs consist of polymeric inorganic networks with adjustable chemical functionality and well-defined pores that make them ideal for these applications. The objective of this research was to test the potential for CO₂ capture on Zn-based MOFs by …
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Design and synthesis of components for optically active metal-organic frameworks (MOFs) and synthetic routes to diverse deuterium labelled α-diazoacetates, α-diazoacetamides, α-diazoketones, and the antibiotic azaserine
Metal-organic frameworks (MOFs) are porous crystalline solids that consist of metal nodes connected to organic linkers that assemble into one-, two- or three-dimensional frameworks. Among other applications they have recently found use in heterogeneous asymmetric catalysis. Since that time the …
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Metal Organic Frameworks with catalytically active Metal Nanoparticles
… is the investigation of catalytically relevant metal nanoparticles (MNP) stabilized in porous coordination polymers (PCPs) also called metal-organic frameworks (MOFs). The syntheses of the catalyst family MNP@PCP/MOF as well as the investigation of its catalytic activity are discussed in detail. …
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Hydro/Solvothermal Synthesis, Structures and Properties of Metal-Organic Frameworks Based on S-Block Metals
… gas emissions implicated in global warming. Metal Organic Frameworks (MOFs) promising potential applications in carbon dioxide capture due to their unique structural properties such as high porosity and high thermal stability. These MOFs have application in separation processes and gas …
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Carbon dioxide sensing with 2D conductive metal-organic frameworks
… a series of two-dimensional (2D) conductive metal-organic frameworks (MOFs) with amine-based linkers. The 2D MOFs studied here show carbon dioxide sensitivity at concentrations as low as 1000 ppm. The identity of both the metal and ligand affects sensing performance in terms of sensitivity, …
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Ion-exchanged metal-organic frameworks for industrially relevant catalysis applications
The inorganic clusters of metal-organic frameworks (MOFs) offer a unique combination of synthetic tunability, structural uniformity, and site accessibility uncommon in conventional heterogeneous catalysts. As such, the inorganic nodes of MOFs provide a promising platform that can be engineered to …
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Energy storage and conversion applications of conductive metal-organic frameworks
… systematic optimization is non-platinum group metal (non-PGM) electrocatalysts for the O₂ reduction reaction (ORR) to water (4e⁻ reduction) and / or hydrogen peroxide (2e⁻ reduction). The electrically conductive metal-organic frameworks (MOFs) M₃(HXTP)₂ (HXTP = 2,3,6,7,10,11-hexaimino or …
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Fundamental Investigations into the Metal-Organic Framework Redox-Hopping Charge Transport——Mechanisms and Improvement Strategies
… transport mechanism in many catalyst-modified metal-organic frameworks (MOFs). Previous studies have shown that ion diffusion is the rate-determining step of redox hopping, but the realization regarding to the fundamental mechanism of redox hopping in MOF is still infantile. In this …
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Synthesis and Structures of New Three-Dimensional Copper Metal-Organic Frameworks
<p>Metal-organic frameworks (MOFs) are crystalline materials with metal ions covalently bonded to organic ligands. The ligands act as spacers often creating a porous structure with very high pore volume and surface area. MOFs are known for their robust structures, high porosity, and different …
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Growth and characterizations of two-dimensional metal-organic frameworks
Metal-Organic Frameworks (MOFs) are a class of porous materials with a crystalline structure that can be designed based on extremely tunable building blocks of organic molecules and metal ions. They are typically insulators but making them [pi]-conjugated with two-dimensional structure results in …
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The synthesis and characterization of porous, conductive, and ordered materials
… with boronic acids to prepare covalent-organic frameworks (COFs) possessing boroxole linkages. After preparing the precursors, several different reaction conditions were attempted, but the desired COFs proved elusive. The second class of materials was tetrathiafulvalene-based …
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Synthesis and characterization of various coinage metal complexes with bridging diimine ligands
This thesis is a study of coinage metal complexes with various bridging diimine ligands. It has 75pp, 4 tables, 55 figures and the references for the study of group 11 elements. It discusses one main project divided by three chapters describing in general the synthesis; structure and spectroscopic …
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Oxygen atom transfer with manganese-exchanged metal-organic frameworks
… from both a fundamental and applied perspective. Metal-organic frameworks (MOFs) are an attractive platform for catalysis because they enable access to unique coordination environments and reactivities; this is due in part to their tunability combined with the site isolation offered by their solid …
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Mass transport in metal-organic frameworks as a limiting step in size-selective oligomerization
Metal organic frameworks (MOFs) are a relatively new class of crystalline, porous materials at the interface of organic and inorganic chemistry that have been applied in gas absorption and storage systems, thin-film devices, and heterogeneous catalysts. While numerous examples of size-exclusive …
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ELECTROCATALYTIC WATER OXIDATION BY METAL ORGANIC FRAMEWORKS
CO(MN, NI) (BTC), CO(TP) AND CO(PZDC) METAL ORGANIC FRAMEWORKS (MOFS) WERE SYNTHESIZED AND TESTED AS ELECTROCATALYSTS FOR WATER OXIDATION. AMONG THEM, CO(BTC) SHOWED EXTRAORDINARY ACTIVITY. THE CATALYTIC ONSET OVERPOTENTIAL OF CO(BTC) IS 400 MV AND THE STABILITY OF CO(BTC) LASTS AS LONG AS 75 MIN …
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Investigating the Single Crystal to Single Crystal Transformations of Highly Porous Metal-Organic Frameworks Through the Crystalline Sponge Method
… the molecular sponges, which are highly porous metal-organic frameworks (MOFs), is first investigated, revealing that the Co-based MOF, 1, undergoes two remarkable transformations. This thesis also demonstrates how the technique can be employed to visualize the motion and occupancy of gaseous …
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IMPLEMENTATION OF METAL-ORGANIC FRAMEWORK ON MEMBRANE DEVELOPMENT FOR LIQUID SEPARATION : INVESTIGATION, CHARACTERIZATION AND APPLICATION
The implementation of metal-organic frameworks (MOFs) in the development of MOF-membrane composites for liquid separation remains at nascent stage. As most of discovered MOFs suffer from poor water stabilities, it has severely limited these composites’ further applications and commercialization. In …
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Synthesis and Characterization of pure-phase Zr-MOFs Based on meso-Tetra(4-carboxyphenyl)porphine
… in the development of porphyrin-based materials. Metal organic frameworks (MOFs) can act as a scaffold for the immobilization of porphyrins in desired arrangements. The crystalline nature of MOFs allows for control over spatial arrangement of porphyrins and the local environment of the porphyrin …
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Syntheses, Structures and Properties of Metal-Organic Frameworks
<p>Mercury is one of the most serious heavy metal pollution sources that threaten people’s health. For decades, people have developed many technologies and materials to capture mercury from flue gas of coal-fired plant. Currently, the most effective material for mercury absorption is powdered …
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