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 23 for “"supramolecular architectures"”.
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Supramolecular architectures for neural prostheses
Neural prosthetic devices offer a means of restoring function that have been lost due to neural damage. The first part of this thesis investigates the design of a 15-channel, low-power, fully implantable stimulator chip. The chip is powered wirelessly and receives wireless commands. The chip …
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Supramolecular architectures: macrocycles, catenanes and polyrotaxanes
Polyrotaxanes are molecular composites consisting of three components: linear polymers, 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)( …
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Metallo-supramolecular Architectures based on Multifunctional N-Donor Ligands
Self-assembly processes were used to construct supramolecular architectures based on metal-ligand interactions. The structures formed strongly depend on the used metal ion, the ligand type, the chosen counter ion and solvent as well as on the experimental conditions. The focus of the studies was …
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Ferrocene-derived Heterobimetallic Supramolecular Architectures: Synthesis, Guest Encapsulation and Stimulus-Responsive Studies
Metallosupramolecular architectures are increasing in popularity due to their range of applications and ease of self-assembly. Many are able to readily change their shape and/or function in response to external stimuli and have the ability to encapsulate guest molecules within their internal …
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Coordination chemistry of cis,trans-1,3,5-Triaminocyclohexane : from mononuclear complexes to supramolecular architectures
The coordination chemistry of the rigid, aliphatic triamino ligand \(cis,trans\)-1,3,5-triaminocyclohexane (\(trans\)-tach) is investigated. With closed shell transition metals, \(trans\)-tach forms 1-D {Ag(OTf), ZnCl\(_2\)} networks and a 3-D {AgNO\(_3\)} coordination polymer with unprecedented …
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Supramolecular Architectures in Molecular Medicine: Visualizing and Manipulating the Structure of Protein-Lipid Surfaces
In separate studies, myoglobin has been used to study the fluorescence lifetime behavior of oriented biomolecular surfaces. These studies have revealed differences in lifetime between differentially oriented myoglobin molecules, consistent with differential accessibility of the heme pocket to …
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Supramolecular Architectures in Molecular Medicine: Visualizing and Manipulating the Structure of Protein-Lipid Surfaces
… revealed new insight into the structure of these supramolecular aggregates and their interfacial behavior. In order to allow accurate quantitation of lateral size a new imaging standard was developed. This standard, peptide modified colloidal gold, has been used in solution to solve tip induced …
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Progressive design and self-assembly of supramolecular architectures : based on metallamacrocyclic nickel(II) complexes with bipodal tetra-alkylaroylbis (thioureas)
Rationally designed bipodal3,3,3',3'-tetraalkyl-l,1'-benzoylbis(thioureas) are used as pre-programmed cheiating ligands to form metallamacrocyclic square planar nickel(ll) complexes via self-assembly. Metal : ligand stoichiometries of either 2:2 or 3:3 can be achieved by using meta- or para- …
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Zinc(II) Schiff Base Complexes and their Aggregation/Deaggregation Properties: Versatile and Multifunctional Materials as Chemosensors and Building Blocks for New Supramolecular Architectures
In questa tesi di dottorato si riporta la sintesi, caratterizzazione e studio delle proprietà di aggregazione/disaggregazione di una serie di complessi anfifilici derivati da basi di Schiff bis(salicilaldiminato) di Zinco(II), con diversi gruppi diamminici a ponte, e le loro applicazioni come …
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Nano chemistry : large molecular capsules and coordination networks based on self-assembly
This thesis focuses on the characterisation of supramolecular structures containing p-sulfonatocalix[ n]arenes (where n=4,5,6,8) with suitable guest molecules and lanthanide metal cations. The characterisation is based primarily on X-ray diffraction but high-resolution NMR techniques have also been …
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Cyclodextrins : molecular wheels for supramolecular chemistry / Julia Lock.
… and characterisation of a variety of supramolecular architectures based on cyclodextrins.
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Supramolecular hybrid organic-inorganic multicomponent architectures in solution and on surface
Supramolecular architectures can be built-up from a single molecular component (building block) to obtain a complex of organic or inorganic interactions creating a new emergent condensed phase of matter, such as gels, liquid crystals and solid crystal. Further the generation of multicomponent …
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Design, Synthesis and Characterization of D-glucosamine Low Molecular Weight Gelators
… few decades, because of their ability to form supramolecular architectures as well as their many potential applications in biomedical research and as advanced materials. Most of the gelators were discovered through serendipity, and their structural requirements are somewhat ambiguous. This is …
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Metallo-Supramolecular complexes and their interactions with biomolecules and cells
Chapter 1 introduces the field of supramolecular chemistry and reviews examples of supramolecular architectures. Applications of these assemblies are outlined with a focus on DNA recognition. In chapter 2 the synthesis and characterisation of an array of palladium(II) and platinum(II) …
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Synthesis and Characterization of Sugar Derivatives as Functional Gelators
<p>Systems formed by the supramolecular assemblages of organic molecules known as organogelators and hydrogelators are currently, and only recently, a subject of great attention and promise. In this context, low molecular weight gelators (LMWGs) are of particular interest because they provide a …
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Materials with supramolecular chirality : liqid crystals and polymers for catalysis
… 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 anisotropic molecular networks. This dissertation details the synthesis and characterization of chiral …
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Supramolecular helical arrangement of porphyrins along DNA : a thesis submitted in the partial fulfilment of the requirements for the degree of Doctor of Philosophy in Chemistry, Massey University, Palmerston North, New Zealand
… we have developed a novel range of porphyrin-DNA supramolecular constructs for future applications in nanobiotechnology. A number of β-pyrrolic functionalised porphyrin precursors were synthesised to be used as building blocks in the construction of both covalently and non-covalently modified …
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Assemblies of Metal-Organic Polyhedra: Synthesis, Properties and Characterization
… Polyhedra (MOP) are nanoscale capsule-like supramolecular architectures composed of metal ions and organic linkers. They have well defined cavities depending on the ligand shape and metal-vertex geometry. The thesis concerns MOP composed of 12 copper(II) dimers (Cu24) and 24 isophthalate …
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Dibenzo-30-crown-10: Synthetic optimization and studies of the binding conformation
… host-guest chemistry as a discipline within supramolecular chemistry. Crown ethers form complex molecules containing organic cations and neutral organic molecules. Additionally, they form components in supramolecular architectures such as catenanes, rotaxanes, and supramolecular polymers. …
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