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Showing 1 to 20 of 172 for “"host-guest"”.
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Biomimetics and Host-Guest Chemistry
In an effort to produce the tetrahedrally coordinated, catalytically active zinc center, three families of tris(2-pyridyl)methanol derivatives were synthesized and characterized. Zinc binding studies revealed that the binding behaviors of the ligands depended on the steric and electronic properties …
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Selectivity in host-guest compounds
It isn't easy to separate structurally similar guests by conventional methods such as distillation if the mixture components have similar functional groups and boiling points. This thesis aimed to investigate the relationship between the internal structures of host-guest compounds and the …
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Molecular selectivity by host-guest methods
The Host-Guest inclusion crystallization method has long been used for the separation of closely related compounds. Especially for the separation of isomers which presented difficulties in techniques like distillation or chromatography. In this study, different host systems were used to separate …
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Structural studies of supramolecular host-guest systems
… of the structure and function of supramolecular host-guest systems. Host-guest inclusion complexes were formed between β-Cyclodextrin (β-CD) and its copolymers (as hosts), with several types of guest molecules both in aqueous solution and the solid state. The research is divided into two themes; …
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Halogen···Halogen interactions in host - guest systems
… investigation of halogen bond interactions in host-guest complexes utilising both experimental and theoretical techniques. Two host compounds, tetrakis-4-(bromophenyl)ethylene and its iodo-analogue were synthesised for the studies reported in Chapter 3, 4 and 5. Chapter 3, deals with the …
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Developing host-guest relationships in Thai tourist resorts
… of national culture on the development of host-guest relationships between local and international tourists and Thai resort operators on Samui Island, Thailand. It proposes that a quality relationship between tourists and resort operators, which is characterised by high levels of trust and …
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Molecular Recognition in Host-Guest Ionophore-Siderophore Assemblies
… assemblies and, more specifically, host-guest complexes involved in molecular recognition events. The supramolecular assemblies studied take root from metal ion delivery in biological uptake pathways, specifically the delivery of iron to microbial cells. These assemblies are studied …
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Functional Supramolecular Hydrogels Mediated by Host-Guest Chemistry
Hydrogels mediated by host-guest interactions represent a compelling class of materials with a myriad of promising applications including medical devices, wearable electronics and even for use as a strong adhesive. Several high-impact applications involving cyclodextrin (CD) mediated hydrogels have …
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Structure and reactivity of diol host-guest compounds
… 10- dihydroanthracene with various guest molecules have been determined by X-ray diffraction. The guests were 2-butanone, 4-vinylpyridine, 4-methylpyridine and 2-methylpyridine. The host to guest ratios were determined by microanalysis and density measurements. The change of the …
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Geometric and optical transformations of supramolecular host-guest amphiphiles
… energy applications, and others. Simultaneously, host-guest chemistry provides a robust and powerful mechanism for inducing switching on the molecular level. In this research, we demonstrate a new platform that combines molecular self-assembly of an amphiphilic chromophore guest molecule with its …
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Self-Assembled Host-Guest Thin Films for Functional Interfaces
… surfaces with a new or improved function. "Host-guest" thin film complexes are composed of "host" molecules attached the substrate surface, either through physisorption or covalent bonds, with cavities for the inclusion of desired "guest" molecules for the functionalization of the surface. …
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The Chemistry of Fullerenes, Polymers, and Host/Guest Interactions
… of fullerenes, investigation of host/guest interactions in solution, and the synthesis and characterization of ion containing polymers. The separation and functionalization of fullerenes is a recent and exciting area of research. The separation methods outlined are intended to …
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Nitrosoarenes: magnetic anisotropy, donor-acceptor bonding and host-guest chemistry
… (DMANB) and p-nitrosocumene (p-NC) by organic host molecules such as octa-acid (OA), cucurbit[7]uril (CB7), and cyclodextrins (?,?,?-cd) in aqueous solution is studied.
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The Synthesis and Host-Guest Applications of Synthetic Receptor Molecules
<p>Host-guest chemistry involves the complimentary binding between two molecules. Host molecules have been synthesized to bind negative, positive, and neutral molecules such as proteins and enzymes, and have been used as optical sensors, electrochemical sensors, supramolecular catalysts, and in the …
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Functional polyoxometalate assemblies: from host-guest complexes to porous frameworks
The host-guest chemistry of two sets of isopolyoxometalate clusters is investigated. In particular the binding modes of cationic alkali and alkali earth metals through coordinative interactions with the cluster anions {Mo36} and {W36} were compared and contrasted. It was shown that the ionic radii …
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The synthesis and host-guest activity of novel cyanoborate salts
… of a lock and key. Complex formation between host and guest molecules is often accompanied by conformational reorganisation, which makes it possible to engineer and fine-tune synthetic receptor analogues for optimal function and selectivity. This thesis primarily describes a supramolecular …
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Studies in molecular recognition : self-assembling molecular host-guest sytems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Surface conjugation of upconversion nanoparticles via supramolecular host-guest self-assembly
… for UCNP modification via supramolecular host-guest interactions leading as-made oleic acid (OA) stabilized UCNPs (OA-UCNPs) from hydrophobic into hydrophilic. At the same time, the modified host molecules on the surface of UCNPs can provide a considerable number of cavities, which can …
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Host-Guest Systems and Their Derivatives Based on Metal-Organic Frameworks
Including guest compounds inside the pores of nanoporous crystalline hosts (e.g. zeolite) is a key strategy to post-synthetically functionalise these nanoporous materials over past half a century. It yields highly active and stable heterogeneous catalysts as well as robust materials with tuneable …
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Luminescent Iridium(III) Cyclometalated Complexes: Host-Guest Chemistry and Application as Sensors
… have been synthesized and investigated in a host-guest chemical context and in studies towards an application in the detection of peroxide-based explosives in fingerprints. The complexes [Ir(ppy-R)2(bpy)]n+ studied here contain two cyclometalated ligands (ppy-R: R-substituted …
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