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 8 of 8 for “"n→π*"”.
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Part I: Circular dichroism studies of optically active charge transfer complexes. Part II: vapor phase and solvent dependence circular dichroism studies of some terpenes, α-phenylethanol, and α-phenylethylamine
<p>The circular dichroism charge transfer (CT) spectra of the achiral acceptors TCNE, DDQ, and Vitamin K<sub>3</sub> with chiral donors such as terpenes, steroids and β-phenylethylamine derivatives in methylene chloride at 27° were investigated. A new transition not attributable to either component …
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Part I: Search for a correlation between molecular structure and mesogenicity. Part II: Cotton effects of α,β-unsaturated diesters
<p>Part One of this work is a correlation of molecular structure with mesophase formation and stability. Since it has been established that mesogenic compounds are linear, rigid, and contain polarizable electron density, the synthetic approach restricts molecular structure to include these …
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Isomerization-Locked Alkene Analogues of Xaa–Pro Dipeptides in the Proteins Collagen and Bora
Collagen is one of the most abundant human proteins. It exists as a right-handed superhelix called the triple helix. The triple helix consists of three left-handed polyproline type II (PPII helices) that intertwine around a common axis. Each PPII helix has the repeating peptide sequence …
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Quantifying Cooperativity in Non-Covalent Networks
Non-covalent interactions are important in biological, material, systems, and supramolecular chemistry. Some quantification of cooperativity in networks of non-covalent interactions has been done in the literature, but these experiments are often complex and not easily applicable to many different …
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Bioorthogonal Reagents: Design, Synthesis, and Reactivity
The development of reactions that fit the stringent criteria for click chemistry and bioorthogonal chemistry has enabled discoveries and applications in fields ranging from materials science to chemical biology. These reactions must proceed rapidly and selectively under mild conditions. This …
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Beiträge zur Halogen- und Pseudohalogenchemie
Das Ziel dieser Arbeit war die Charakterisierung und Synthese neuer Halogen- und Pseudohalogenverbindungen und die Untersuchung mit Hilfe von quanten– mechanischen Rechnungen. Im Folgenden sind kurz die Ergebnisse der in den Kapiteln C, D und E vorgestellten Arbeiten zusammengefasst. Die in der …
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Mechanistic studies to determine the catalytic roles of active site residues in phosphite dehydrogenase
Phosphite dehydrogenase (PTDH) catalyzes the oxidation of phosphite to phosphate with the concurrent reduction of NAD+ to NADH. The mechanism of the reaction resembles a phosphoryl transfer reaction. A nucleophilic displacement reaction occurs on the phosphoryl group, with water or hydroxide …
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Damaged Collagen Detection and A Novel Approach to 1,3-Dipolar Cycloaddition Reactivity: Research at the Interface of Chemistry and Biology
Part I Chapter 1. Collagen Mimetic Peptides as a Selective Binder for Damaged Collagen. “Collagen diseases” were first introduced by Klemperer and coworkers in the 1950s. This type of disease can cause fibrinoid degeneration or changes in the collagen fibers that denature the collagen triple helix. …