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 143 for “"macrocycles"”.
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Functional Nanomaterials From Bis-Urea Macrocycles
<p>Self-assembly of bis-urea macrocycles usually give tubular crystals with nano-sized channels that we use as molecular container. These molecular containers alter the reactivity, stability, and chemical behavior of the reactants entrapped within them. This dissertation is focused on bulk …
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Functional Materials From Self-Assembled Macrocycles
<p> Organic self-assembled materials have great utility as sensing materials, in gas storage, in separations, and as electronic devices. These assembled materials are typically held by non-covalent interactions such as hydrogen bonds, pi-pi stacking and dipole-dipole interactions. We are interested …
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Supramolecular architectures: macrocycles, catenanes and polyrotaxanes
… bulky stoppers at the ends of polymer chains and macrocycles threaded by the polymers. A series of tetraarylmethyl derivatives as blocking groups were synthesized. Using tris(p-ten-butylphenyl)( 4-hydroxyphenyl)methane a new blocking groupfmitiator (BO(mit) was synthesized. The BG(mit's ability of …
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Synthesis and complexes of new selenoether macrocycles
… ?3-[16]aneSe4 coordination.<br/><br/>Five novel macrocycles containing a mixed O/Se donor set of the type OxSe2x, two small ring Se3 macrocycles and two Se2N macrocycles have been synthesised. Two methods of production have been investigated from the same precursors, a NaBH4 reduction and a low …
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Solution Properties of Some Iron and Copper Macrocycles.
Solution studies were conducted on iron(ll) phthalocyanine (FePc) and three copper macrocycle complexes. Concentrations of saturated solutions of FePc in pyridine, 2-methylpyridine, 3-methy1 - pyridine, and 4-methyl pyridine were determined from visible spectral data, and in dimethyl sulfoxide …
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Design and Synthesis of Natural and Unnatural Macrocycles
<p>Macrocycles have received growing appreciation for their potential in probing a broader biological space, and there are a significant number of bioactive macrocycles in nature. In addition, a macrocyclic scaffold provides interesting features, including high binding affinity and target …
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Design and synthesis of conjugated macrocycles and polymers
… synthesis and characterization of conjugated macrocycles and polymers are presented in this dissertation. In particular, work involving the exploration of unusual and/or novel aromatic structures for various materials applications is described in detail, along with appropriate discussions of …
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CONSTRUCTING NANOSTRUCTURES WITH ATOMIC PRECISION: THE SYNTHESIS OF SPIROLIGOMER-BASED MACROCYCLES
… strategy to produce various spiroligomer-based macrocycles that bridge the gap between organic molecules and small proteins. “Spiroligomers” (formerly known as “bis-peptides”) are a class of molecules produced by the assembly of “bis-amino acids”, molecules containing two amino acid regions on a …
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Synthesis and Recognition Properties of Functionalized Nanomaterials From Pyridyl Urea Macrocycles
… materials. Our lab has developed bis-urea macrocycles that predictably self-assembled into porous materials by urea-urea hydrogen bonding interactions. We are now exploring macrocycles that combine ureas and a second functional group (pyridine) to potentially give two modes of assembly or …
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Synthesis and properties of novel macrocycles and related chromophoric benzenoid compounds
The synthesis and properties of some macrocyclic compounds of interest are presented. Resorcinarenes with functionalized conjugated rigid rods made of oligo-p-phenylenes would lead to an entirely new class of functional, soluble, well-defined architectures impacting a variety of multidisciplinary …
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Polycyclic Aromatic Hydrocarbon (PAH)-Based Conjugated Macrocycles and Polymers For Electronic Applications
… systems, including PAH–based conjugated macrocycles, conjugated polymers and conjugated foldamers. Novel PAH-based conjugated macrocycles have been developed for electronic applications. Specifically, two imine-based shape-persistent macrocycles containing triphenylene building blocks …
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Investigations of highly conjugated macrocycles and polymers for aggregation and chemical sensing
With the goal of developing Schiff base macrocycles with conjugation extended over multiple aromatic rings, new phenanthrene and triphenylene-containing bis(salicylates) were synthesized. A convenient route to 3,6,9,10-tetraalkoxy-2,7-diiodophenanthrene was developed. This compound has been found …
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Destruction of biological tetrapyrrole macrocycles by hypochlorous acid and its scavenging by lycopene
<p>Hypochlorous acid (HOCl) is a potent oxidant generated by the hemoprotein myeloperoxidase. Although HOCl plays an important role in the innate immune response,sustained high levels of HOCl has been implicated to play a harmful role. In several pathological conditions such as atherosclerosis, …
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Synthetic, structural, and stability studies of metal complexes of cross -bridged tetraamine macrocycles
<p>Cross-bridging of tetraazamacrocyclic ligands with an ethylene unit forms a family of bicyclic tetraamine ligands originally designed and synthesized by the Weisman-Wong research group to selectively complex small metal ions such as Li+ in a cis-folded configuration. Cu(II), Ga(III), and In(III) …
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