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Articles 1 - 7 of 7
Full-Text Articles in Chemistry
Vanadium Partitioning Between Magnetite, Hematite, And A Hydrothermal Fluid: Implications For Iocg And Ioa Deposits, Jeremy Raymond Nederbo
Vanadium Partitioning Between Magnetite, Hematite, And A Hydrothermal Fluid: Implications For Iocg And Ioa Deposits, Jeremy Raymond Nederbo
Graduate Research Theses & Dissertations
Iron oxide-copper-gold (IOCG) and iron oxide-apatite (IOA) deposits are major sources of iron contained within magnetite and/or hematite as well as copper contained within copper-iron sulfides and gold as a native metal. Their formations have been attributed to magmatic, hydrothermal, or a mixture of magmatic-hydrothermal processes. Vanadium can readily substitute into magnetite via ion exchange due to similar atomic radii and charges as iron and has thus been hypothesized to be an effective tracer of hydrothermal or magmatic inputs. To evaluate the mobility of vanadium in a magnetite-hematite-fluid system, experiments on the partitioning of vanadium between magnetite, hematite and a …
Computational Studies Of The Effects Of Substitutions On Silatranes And Ring Strain Energies, As Well As Determination Of Aromaticity And Complexation In Polypnictogen Analogues Of The Cyclooctatetraenyl Dianion, Alexander Stuart Pixler
Computational Studies Of The Effects Of Substitutions On Silatranes And Ring Strain Energies, As Well As Determination Of Aromaticity And Complexation In Polypnictogen Analogues Of The Cyclooctatetraenyl Dianion, Alexander Stuart Pixler
Graduate Research Theses & Dissertations
The work in this dissertation computationally examines four areas involving variations on archetype molecules and how they affect reactivity and physical properties. Studies in Chapters 2 and 3 assess substituent effects on cyclic systems, while those in Chapters 4 and 5 explore both partial and complete substitution of ring component atoms as well as the chemical implications of the substitution.The effect of substituents on molecular reactivity is a critical concept that affects every branch of chemistry. Previous work within our group showed that 1-hydridosilatrane was an effective and selective reducing agent for a variety of compounds. Fully 3,3,7,7,10,10-substituted silatranes have …
Structural Analysis Of Polar Aggregates And Inter-Ionic Distances In Room Temperature Ionic Liquids, Emily Elizabeth Dalbey
Structural Analysis Of Polar Aggregates And Inter-Ionic Distances In Room Temperature Ionic Liquids, Emily Elizabeth Dalbey
Graduate Research Theses & Dissertations
Ionic liquids have a wide variety of applications in chemistry due to their unique properties such as low flammability, low volatility, and high thermal and chemical stability. These properties make them great solvents, electrolytes for lithium-ion batteries, and more. Ionic liquids are salts whose components are mis-matched in size and shape leading to low melting points. To design an ionic liquid with a desired property it is key to first understand their structure. Lineshape analysis of the charge alternation peak from the experimentally measured or computationally calculated X-ray scattering data can give information about the size of the polar aggregates …
Materials And Electrochemical Interfaces For High Energy Density Sodium Metal Batteries, Olusola John Dahunsi
Materials And Electrochemical Interfaces For High Energy Density Sodium Metal Batteries, Olusola John Dahunsi
Graduate Research Theses & Dissertations
Batteries with low-cost, high energy and safe features density are now widely demanded.This dissertation systematically and comprehensively studies the materials and electrochemical interfaces of sodium (Na) metallic anodes and metal-free anodes for high energy density sodium metal batteries (SMB) to meet energy storage demands. This dissertation is divided into two sections, with the first section focusing on the modifications made to pristine metallic sodium anodes using 1.6 at % tin (Sn) to create Na-Sn alloy anodes. The results confirm that the Na-Sn anode features interconnected Na15Sn4 backbones that support sodium structurally, enhance Na+/Na redox kinetics, and facilitate dendrite-free Na plating …
Bioanalytical Studies Of Disease Protein Profiles: Maldi-Tof Ms, Prajkta Satish Chivte
Bioanalytical Studies Of Disease Protein Profiles: Maldi-Tof Ms, Prajkta Satish Chivte
Graduate Research Theses & Dissertations
Coronavirus disease-2019 (COVID-19), which is caused by a novel coronavirus named severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), has ravaged the world for the past 3 years. Even today, there still exists a need for rapid, accurate, economical and non-invasive diagnostic testing platforms that yield high specificity and sensitivity towards the constantly mutating SARS-CoV-2. Research has consistently indicated saliva to be a more amenable specimen type for early detection of SARS-CoV-2, compared to the oral and nasopharyngeal swabs. Considering the limitations and high demand of the existing COVID-19 testing platforms, this dissertation work studies used MALDI-ToF MS (matrix-assisted laser desorption/ionization-time of …
Synthetic Methodologies Using Nucleophile-Electrophile Chemistry, Jacob C. Hood
Synthetic Methodologies Using Nucleophile-Electrophile Chemistry, Jacob C. Hood
Graduate Research Theses & Dissertations
Synthetic organic chemistry is a vital part of the modern world – making up 15-20% of the U.S. economy. New synthetic reactions can lower manufacturing costs and create more environmentally friendly processes. Substitution, addition, and superelectrophilic chemistry are potent tools to afford potentially essential compounds. The work outlined in this dissertation recounts the expansion of synthetic methodologies employing substrates with a wide range of electrophilicities toward synthesizing heterocyclic molecules. These concepts are summarized in chapter 1. Chapter 2: N-Heterocyclic alcohols are excellent substrates for superacid-promoted Friedel-Crafts reactions. The N-heterocyclic alcohol ionizes to produce reactive, dicationic intermediates, providing good to excellent …
Insight Into The Nanostructure Of “Water-In-Salt” Solutions: A Saxs/Waxs Study On Imide-Based Lithium Salts Aqueous Solutions, Xinyi Liu
Graduate Research Theses & Dissertations
The fundamental understanding of the liquid electrolytes (LEs) solvation structure and electrode-electrolyte interface behavior is important to the entire electrochemical energy storage field. Understanding the solvation structures from a few angstroms to hundreds of nanometers will undoubtedly lay a good foundation for studying the macroscopic transport properties, such as viscosity and ionic conductivity, of the LEs."Water-in-salt" electrolytes that contain 21 m lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) with excellent electrochemical and physical properties have been extensively investigated. However, the structural understanding of the LiTFSI in water is still lacking. Here, we perform synchrotron X-ray scattering to systemically study the structural variation of …