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 250 for “"chirality"”.
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Single chirality through crystal grinding
Contains fulltext : 74877.pdf (Publisher’s version ) (Open Access)
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Determining molecular chirality with femtosecond LASERs
More than 200 years since its first discovery Chirality remains one of the most challenging aspects of analytical chemistry. As chiral enantiomers share almost all physical properties they are only distinguishable through interaction with another chiral system, be it chiral molecules or circularly …
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Inducing Chirality in CdS Nanocrystals with Biomolecules
… exchange with cysteine has been shown to induce chirality in CdE NCs, no prior studies have demonstrated the use of intrinsically chiral biomolecules, like peptides and proteins, to generate chiroptical responses in these materials. Chapter 1 reviews the synthetic tunability of CdE NCs and …
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Chirality Determination Using Three-Wave Mixing Microwave Spectroscopy
… exhibiting large amplitude motion and through chirality determination. The first half of this dissertation explores the use of deep averaging to determine the structure of silicon containing molecules in collaboration with Dr. Guirgis from the College of Charleston. For each of these molecules, …
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Theory and applications of chirality in microstrip antennas
The aim of this study is to analyze radiation from surface currents lying on an interface between a grounded, planar, lossless, isotropic, chiral slab and a simple lossless dielectric half-space. An eigenvalue-eigenfunction approach, specifically the Ohm-Raleigh method, is employed to obtain a …
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Memory of Chirality in 1,4-Benzodiazepin-2-ones
Memory of chirality (MOC) is an emerging strategy in asymmetric synthesis. It has been applied to enolate chemistry, reactions involving carbocation intermediates, and to radical systems. In this strategy the chirality of an enantiopure reactant is transferred to the dynamic chirality of a reactive …
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Understanding emergence of supramolecular chirality in lyotropic conjugated polymers
… systems. Inspired by the enigma of natural homochirality, the design and construction of artificial chiral hierarchical structures have garnered significant research attention. Recent advances in incorporating chirality into artificial systems have underscored its potential to elevate their …
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Single chirality single-walled carbon nanotubes : isolation and application
… properties that are dependent on their chirality. Small changes in geometry of the tube dramatically change the bandgap of the tube, and whether it is metallic or semiconducting. This thesis establishes the first reproducible method by which to separate a single electronic type of carbon …
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Mesoporous organosilica materials with amine functions : surface characteristics and chirality
In this work mesoporous organisilica materials are synthesized through the silica sol-gel process. For this a new class of precursors which are also surfactant are synthesized and self-assembled. This leads to a high surface area functionality which is analysized with copper (II) and water …
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Synthesis, structure and chirality of some neutral cobalt (III) complexes
<p>Structures are assigned to the six stereoisomers of the complex 2 , 4-pentanedionatobis(S-alaninato)cobalt(III) and to the diastereomers of bis(2, 4-pentanedionato)S-aminoacidatocobalt(III), where the S-amino acid is S-alanine, S-valine, N-methyl-S-alanine and N-methyl-S-valine. Adsorption …
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Chiral expression at the nanoscale origin and recognition of chirality
Chirality, familiar to all chemists, is usually applied to molecules or assemblies of molecules and plays an important role in both animate and inanimate systems. It is commonly the case that chirality of a system arises from a chiral building block yet chiral systems can also emerge from achiral …
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Disorder and diffuse scattering in single-chirality (TaSe4)2I crystals
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Analysing Vibrational Circular Dichroism: Confidence Levels for Absolute Chirality Assignment
… is valuable in the assignment of absolute chirality. Assignment of chirality traditionally involves visual comparison of calculated and experimental spectra which can be subjective and time consuming. Experimental VCD spectra for 40 compounds were acquired on different VCD spectrometers …
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Materials with supramolecular chirality : liqid crystals and polymers for catalysis
Mesomorphic organizations provide a powerful and efficient method for the preorganization of molecules to create synthetic materials with controlled supramolecular architectures. Incorporation of polymerizable groups within a liquid crystalline template can set the stage for the synthesis of …
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Chirality in clinical pharmacology : studies with ketoprofen / by Peter John Hayball.
Examines aspects of the potential enantioselective pharmacokinetics and pharmacodynamics of ketoprofen in humans, and develops methods for quantifying total (bound plus unbound) and unbound ketoprofen enantiomers in plasma.
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Equilibration of deep neural networks and carrier chirality in Rashba systems
… how a non-equilibrium charge-carrier chirality distribution in a clean, strongly Rashba-coupled system at low temperatures decays over time. We first motivate this analysis based on experimental studies of transport properties in Rashba materials at low temperatures and subject to …
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Synthesis and electronic transport in single-walled carbon nanotubes of known chirality
… has been performed on carbon nanotubes of known chirality. Having first grown carbon nanotubes with a chemical vapor deposition growth in a quartz tube using ethanol vapor as a feedstock to grow long individual single-walled carbon nanotubes on a silicon chip that is also compatible with Rayleigh …
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