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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 471 for “"photochemical"”.
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Photochemical oxidant air pollution : peroxyacetyl nitrate (PAN) as an indicator of photochemical activity
Photochemical smog is formed by the interaction of sunlight with nitrogen oxides and hydrocarbons. These precursors are principally emitted by anthropogenic sources. As the major component of the photochemical oxidants is ozone, it is used as the indicator of photochemical smog and air quality …
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Photochemical Crosslinking Reactions in Polymers
The post-synthesis modification of polymer properties has very broad applications in industry. It is employed to produce products that are impossible to directly synthesize, modify biomolecules for medical use, and provide compounds for industrial and academic research. Modifying the polymer …
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Development of Photochemical Surface Modification Technique
… with an emphasis on the use of monolayers for photochemical surface modification. The goal of this chapter is also to equip the reader with a comprehensive overview of common surface analytical techniques and a "how-to" analysis guide for thin films. Chapter Two delves into the fundamentals of …
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The Photochemical Substitution of Dimanganese-Decacarbonyl
Made available in DSpace on 2014-12-13T20:10:13Z (GMT). No. of bitstreams: 1 7804049.pdf: 4694293 bytes, checksum: 82557a5de6da3225b033b6bb9bf5e382 (MD5) Previous issue date: 1977
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Conformational Effects of Stereoselective Photochemical Isomerizations
Made available in DSpace on 2014-12-09T17:36:49Z (GMT). No. of bitstreams: 1 7021004.pdf: 4933093 bytes, checksum: e9eb0ca1133273d512299de904b7befe (MD5) Previous issue date: 1970
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Photochemical smog in greater Cape Town
Photochemical smog is the name given to a complex sequence of chemical reactions that occurs in the presence of sunlight. These reactions comprise a mix of organic and inorganic compounds, including a number of toxic secondary pollutants such as ozone (O3) and peroxyacetyl nitrate. These substances …
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Photochemical Oxidation Studies of Porphyrin Ruthenium Complexes
… porphyrin complexes (6a-d) were photochemically synthesized and spectroscopically characterized by UV-vis, and 1H-NMR.</p>
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State-resolved slice imaging of photochemical dynamics
<p>This dissertation focuses on the understanding the unimolecular photochemistry and dynamics</p> <p>utilizing state-resolved slice imaging approach combined with the quantum-state selective</p> <p>spectroscopy technique called resonance enhanced multi photon ionization (REMPI)</p> <p>method. This …
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Hexametalates as Catalysts for Photochemical Oxidation Reactions
The reaction of TiCl$\sb4$ with WO$\sb4$((n-C$\sb4$H$\sb9$)$\sb4$N) $\sb2$ in acetonitrile yields ClTiW$\sb5$O$\sb $ ((n-C$\sb4$H$\sb9$)$\sb4$N) $\sb3$. The complexes ROTiW$\sb5$O$\sb $ (n-C$\sb4$H$\sb9$)$\sb4$N) $\sb3$ (R = CH$\sb3$, C$\sb2$H$\sb5$, and (CH$\sb3$)$\sb2$CH) are prepared in an …
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Advanced Spectroscopic Methods for Photochemical and Electrochemical Systems
… transferred to the reaction center via a photochemical symmetry-breaking charge-transfer (SBCT) process in a few hundred picoseconds. To mimic natural photosynthesis, we explore SBCT in Alice-MOF and demonstrate that solvent polarity tunes the competition between charge separation and …
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Photochemical harpoons: covalent labels for multi-protein complexes
The identification of the biomolecular interaction partners of small bioactive molecules is a fundamental problem in drug discovery and cell biology. This thesis describes the development of fluorescent chemical probes to identify the biomolecular targets of the known organophosphate toxin, phenyl …
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Thermal and Photochemical Interaction of CO2 with Biochar
… reactions were carried out thermally at 333K and photochemically by simulating energy from the with a xenon lamp. The photochemical reaction involving biochar, CO2 with water or a mixture of water and ethanol as hydrogen donor led to a decrease in oxygen content of the parent biochar material, as …
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Photochemical transformations of α-diazocarbonyl compounds in flow
… under continuous flow photolysis. These photochemical transformations yielded 2,3-dihydrobenzofurans, γ- and β-lactones, oxazoles and Wolff rearrangement products indicating the synthetic versatility of these metal-free processes. Continuous flow technology was also applied to telescope …
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Total synthesis of lycoricidine via photochemical dearomative dihydroxylation
… total synthesis of lycoricidine utilizing a photochemical dearomative dihydroxylation of bromobenzene. Modified Narasaka-Sharpless dihydroxylation generates a product bearing both the electrophile and nucleophile for an unprecedented transpositive Suzuki coupling. Hetero-Diels-Alder …
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Photochemical Formation Mechanisms and Applications of Mn Oxide Nanomaterials
… reactions. Our research group recently reported photochemically-assisted abiotic inorganic oxidation of Mn2+(aq) to δ-MnO2 nanosheets in the presence of nitrate and without a microorganism, demonstrating that abiotic Mn oxidation processes are not negligible. My doctoral work focuses on …
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