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Showing 1 to 12 of 12 for “"Pseudorotaxanes"”.
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Thermodynamically Driven (Reversible) End-Capping of Pseudorotaxanes to Produce Rotaxanes
Rotaxanes can be synthesized using a thermodynamically driven approach of self-assembly. The thermodynamically driven approach is an efficient method to provide a better controlled synthesis of specific structures. This synthetic approach takes advantage of a labile bond between the guest molecule …
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Pseudorotaxanes and Supramolecular Polypseudorotaxanes Based on the Dibenzo-24-Crown-8/Paraquat Recognition Motif
The research presented in this thesis focused on pseudorotaxanes and supramolecular polymers based on a new recognition motif, the dibenzo-24-crown-8/paraquat recognition motif. Main kinds of pseudorotaxanes and rotaxanes and various protocols used for the study of them were discussed first. By …
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Design, Preparation and Characterization of Novel Pseudorotaxanes, Semirotaxanes, Rotaxanes, Non-Covalent Supramolecular Polymers and Polycatenanes
… preparation of novel host/guest systems, such as pseudorotaxanes, semirotaxanes, rotaxanes and catenanes, with high association constants, enhanced yields and the abilities to respond to external stimuli are of great importance and significance due to their topological novelty and potential …
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Enhanced Architectural and Structural Regulation Using Controlled Free Radical Polymerization Techniques; Supramolecular Assemblies: Pseudorotaxanes and Polypseudorotaxanes
… to construct such topologies in the form of pseudorotaxanes fashioned from diverse macrocycles with multifarious guest ions is discussed. While the underlying goal was to investigate and understand the mode of complexation based on such environmental factors as substituent affects and …
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Self-Assembly: Synthesis and Complexation of Crown Ethers and Cryptands with R2-NH2 Ions
… size is large enough to allow the formation of pseudorotaxanes. However, the larger crown ether, bis-(m-phenylene)-32-crown-10 (BMP32C10), did form a complex. The complex stoichiometry varied between 1:1 (crown:salt) in solution and 1:2 in the solid state as evidenced by NMR and X-ray …
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Transport transmembranaire et auto-assemblage impliquant des peptides synthétiques modifiés
… rapporte la conception et la préparation de pseudorotaxanes peptidiques. Ce projet est fondé sur des phénomènes d'autoassemblage impliquant des polyammoniums secondaires polybenzyliques et des éthers-couronne greffés sur des peptides. La synthèse et la caractérisation des hôtes et des invités …
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Dibenzo-30-crown-10: Synthetic optimization and studies of the binding conformation
… A series of segmented polyurethane poly(pseudorotaxanes) with paraquats in the backbone were synthesized with different crown ether or cyptand hosts. The threading efficiency was determined by 1H NMR.
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Characterization of Cucurbituril Complex Ions in the Gas Phase Using Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
… box. Chapter 5 characterizes the cucurbit[6]uril pseudorotaxanes in the gas phase. Chapter 6 characterizes the complexes formed by cucurbit[6]uril and α,ω-alkyldiammonium cations in the gas phase, using energy-resolved SORI-CID method. High-level computational methods were also performed to …
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New polymer architectures: synthesis and characterization of polyurethane-crown ether based polyrotaxanes
… and used to prepare host-guest complexes (pseudorotaxanes) with BPP34C10. X-Ray crystal structures of the complexes were determined. Furthermore, a class of viologen-containing polyurethane elastomeric polyrotaxanes was synthesized via this host guest complexation. The threading …
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Host-Guest Systems Based on Crown Ether, Cryptand, and Pseudocryptand Hosts with Paraquat, Diquat, Secondary Ammonium, and Monopyridinium Salt Guests
… hosts. Monopyridinium-based [2]- and [3]-pseudorotaxanes were prepared based on the newly discovered bis(m-phenylene)-32-crown-10/monopyridinium salt and cryptand/monopyridinium salt recognition motifs. Inspired by the formation of solid-state taco complexes between …
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Supramolecular Assemblies: Dendrimers, Linear Arrays, and Polypseudorotaxanes
… pseudorotaxane approach. A series of dendritic pseudorotaxanes were efficiently prepared from self-assembling complimentary building blocks, namely a triply charged ammonium ion and the 1st, 2nd, and 3rd generations of benzyl ether dendrons bearing dibenzo-24-crown-8 moiety. The wholly complexed …
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Syntheses and characterization of copper(I) complexes for study of dynamic supramolecular ring-chain equilibria and application as photoredox catalysts
… (MIMs), such as rotaxanes, catenanes and pseudorotaxanes. The discovery of 1,10-phenanthroline and its use as a ligand for application in the coordination and supramolecular chemistry fields dates back to the late nineteenth century. As ligands, 1,10-phenanthroline (and numerous …