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Full-Text Articles in Chemistry
Design, Synthesis And Study Of Redox And Optoelectronic Properties Of Aromatic Oxidants And Polycyclic Aromatic Hydrocarbons, Mohammad Mosharraf Hossain
Design, Synthesis And Study Of Redox And Optoelectronic Properties Of Aromatic Oxidants And Polycyclic Aromatic Hydrocarbons, Mohammad Mosharraf Hossain
Dissertations (1934 -)
Organic materials play a significant role for the next generation photovoltaic devices that convert solar energy into usable forms of energy. In this regard, polycyclic aromatic hydrocarbons (PAHs) are fundamental tools in the developing area of molecular electronics and photovoltaics as they show excellent optical/electronic properties and are well-suited for applications in such developing areas as flexible display devices, field effect transistors and solar cell panels. Design and synthesis of novel materials for photovoltaics applications would require the proper understanding the mechanism of charge transport and identification of the structural features necessary in a particular molecular wire or PAH. To …
The Photodynamic And Structural Analyses Of Advanced Materials For Solar Fuel Conversion, Brian Pattengale
The Photodynamic And Structural Analyses Of Advanced Materials For Solar Fuel Conversion, Brian Pattengale
Dissertations (1934 -)
Mitigating the current and future climate and pollution issues that have been brought on by the combustion of fossil fuels is of utmost importance and will rely on, in part, the availability of renewable fuel sources. Of the possible sources of energy, solar is abundant, but must be harnessed efficiently and stored as a solar fuel to overcome the current storage issues that limit photovoltaic cells. One such fuel, H2(g), represents a carbon-neutral source of energy if it can be efficiently liberated from water via the water splitting reaction. Thus, much attention is focused on designing materials to perform the …
Photochemical Expulsion Of Leaving Groups From A Naphthothiophene-2-Carboxamide Linked To A Chromophore, Lingzi Li
Dissertations (1934 -)
Two bichromophoric systems were synthesized which have thioxanthone as the chromophore that absorbs the incident light and a naphthothiophene-2-carboxanilide, which serves as a triplet excited state energy acceptor. Upon excitation the triplet excited state of the thioxanthone is populated via intersystem crossing, which is efficient with isc = 0.68. Based on the relative energies of the triplet excited states of thioxanthone (ET = 65 kcal mol-1) and naphthothiophene (ET = 51 kcal mol-1), the subsequent triplet excited state energy transfer to generate the triplet excited state of the naphthothiophene-2-carboxamide should be a very rapid process that is 14 kcal mol1 …
Nadph-Cytochrome P450 Oxidoreductase: Extraction Of The Full-Length Protein And Methyl-Trosy Nmr Of The Soluble Mutants, Sara Ali Jamal Arafeh
Nadph-Cytochrome P450 Oxidoreductase: Extraction Of The Full-Length Protein And Methyl-Trosy Nmr Of The Soluble Mutants, Sara Ali Jamal Arafeh
Master's Theses (2009 -)
NADPH-cytochrome p450 oxidoreductase (CYPOR) is a membrane-bound protein in living cells. CYPOR delivers electrons to cytochrome p450 proteins (CYPs) to catalyze metabolism of drugs and synthesis of steroids. Extraction and solubilization of CYPOR from the membrane is typically done with the TritonX-100 detergent. The amount of the solubilized protein by this detergent, however, remains relatively low to structurally analyze CYPOR with NMR spectroscopy. The goal of the first project in this thesis was to optimize the amount of the extracted CYPOR from the E. coli membrane using various detergents and additives. To this aim, non-ionic detergents with variable hydrophobicity (TritonX-100, …
Synthesis And Characterization Of Biomimetic Models Of Mononuclear Nonheme Iron Dioxygenases And Their Reactive Intermediates, Anne Alyse Fischer
Synthesis And Characterization Of Biomimetic Models Of Mononuclear Nonheme Iron Dioxygenases And Their Reactive Intermediates, Anne Alyse Fischer
Dissertations (1934 -)
Mononuclear non-heme iron dioxygenases (MNIDs) are a class of enzymes that catalyze a variety of reactions, from amino acid catabolism to bioremediation using molecular oxygen. This work focuses on three types of MNIDs: thiol dioxygenaes (TDOs), aminophenoldioxygenases (APDOs), and sulfoxide synthases (SOSs). TDOs, found in mammals, regulate the levels of cysteine along with other thiol-containing molecules, using molecular oxygen to convert them into their corresponding sulfinic acids. APDOs catalyze the oxidative ring cleavage in the biodegradation of nitroaromatics. SOSs are involved in the biosynthesis of large biologically relevant molecules in humans. Although this class of enzymes has gained more attention …
Photoremovable Protecting Groups Based On Electrocyclization With Leaving Group Expulsion Via A Proposed Zwitterion, Gilbert Ndzeidze
Photoremovable Protecting Groups Based On Electrocyclization With Leaving Group Expulsion Via A Proposed Zwitterion, Gilbert Ndzeidze
Dissertations (1934 -)
The triplet excited state of thioxanthone produced by photolysis undergoes reversible triplet energy transfer with a trimethylene - linked benzothiophene-2-carboxanilide ring system. The ensuing electrocyclic ring closure of the anilide moiety produces a putative zwitterionic intermediate that is capable of expelling leaving groups (LG-) from the C-3 position of the benzothiophene ring. Stern-Volmer quenching studies with cyclohexadiene as quencher furnish the rate constants for the triplet excitation transfer in the forward and reverse directions, which can be expressed as an equilibrium constant K = 0.058. Overall, the rate of triplet excited state reaction becomes K x kr = 5.7 x …