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 10 of 10 for “"Alkyl spacer"”.
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The investigation of novel charge transfer systems.
… connected to a polymer backbone via a flexible alkyl spacer linkage. As part of this work new charge transfer complexes were prepared some of which have shown possible novel properties, such as, co-operative magnetic effects and film forming capabilities. Finally, in order to characterise …
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Bridging Mesoscale Phenomena and Macroscopic Properties in Block Copolymers Containing Ionic Interactions and Hydrogen Bonding
… groups as bond charge moieties. A long chain alkyl spacer between imidazolium groups and the polymer backbones ensured a low glass transition temperature (Tg), which is beneficial to ion conductivity. Four different counter anions enabled readily tunable Tgs all below room temperature and …
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A new class of photoresponsive surfactants
… di(ethylene oxide) head group attached to an alkyl spacer of between two and eight methylene groups, coupled through an ether linkage to an azobenzene moiety, were synthesized and developed. Structural changes associated with the interconversion of the azobenzene group between its cis and …
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Cyclic polymer liquid crystal structures.
… backbones with mesogenic moieties attached by alkyl spacer units. Dielectric relaxations have been observed in the mesophases of these materials and the activation energies and extent of broadening of the relaxations have been related to the physicalstructure of the molecules. Theoretical …
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Towards Self-assembling Multichromophoric Materials for Organic Semiconductors
… by two phenothiazine derivatives separated by an alkyl spacer was synthesized. The optical and electrochemical properties of the triad in solution were investigated as well as self-assembly and photocurrent responses in films. It was demonstrated that the chromophores in the triad behaved …
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Synthesis and properties of potentially liquid crystalline phosphorus compounds
… phosphorus atom, were synthesised with varying alkyl chain lengths between C1-C22. Investigation into liquid crystalline behaviour by both sets of compounds failed to demonstrate any mesophase formation. However, tri(nonyloxybiphenyl)phosphine oxide did show evidence of crystal to crystal …
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Photophysics of Hybrid Perovskites with Electroactive Molecules
… perovskites rely on electronically inert organic spacers, this thesis explores systems where electroactive cations actively participate in excited-state processes through inorganic–organic coupling. Central to this exploration is how structural parameters, such as linker length, molecular …
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The synthesis and in vitro evaluation of short interfering RNAs that contain internal modified alkyl spacers
… or backbone. Backbone alterations such as abasic alkyl linkers have been shown to retain, if not improve, gene-silencing capability while providing a means of centrally destabilizing the siRNA duplex, even when occupying the site of the catalytic protein, Argonaute2, whose action was thought to be …
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Synthesis and characterization of ammonium ionenes containing hydrogen bonding functionalities
… systems, we investigated the influence of spacer length on homoassociation and heteroassociation of complementary nucleobase-containing ionenes. Based on DSC analyses, complementary non-segmented ionenes made miscible blends. The Tgs of ionene blends with shorter spacer length (4 bonds …
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Shockwave energy dissipation by mechanoresponsive materials
… structure consisting of charged clusters and alkyl domains. Irreversible shock-induced structural ordering changes with the creation of new nano-segregated domains in the NIL with the longest alkyl chain spacer enhances the shockwave absorption performance. The more ordered domains result in …