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 47 for “"Mechanochemistry"”.
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Mechanochemistry: Redefining the Paradigm of Organic Chemistry
… Union of Pure and Applied Chemistry (IUPAC), mechanochemistry has been recognized as one of the most innovative transformative technologies in the context of green and sustainable organic synthesis. Mechanochemistry offers discrete reactivities compared to their solution-based counterparts by …
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Mechanochemistry of metal-organic frameworks under compression
… and drug delivery. The investigation on the mechanochemistry of MOFs, however, has been very limited in spite of its relevance to the practical application of MOFs. Also, recent reports have demonstrated the possibility to use MOFs for mechanical energy absorption via an internal volume …
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Electrospinning applications in mechanochemistry and multi-functional hydrogel materials
Mechanochemistry is the use of mechanical force to perform chemical reactions and has the potential to bring self-healing functionality to the molecular level. The mechanically induced reactions can become productive when stress-sensitive molecules, or mechanophores, are incorporated into …
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Multi-scale mechanics of monolayer graphene membranes : elasticity, fracture, and mechanochemistry
Graphene, owing to its remarkable material properties, is considered as an ideal material for a broad range of nano-scale applications. The performance of any graphene-based device would depend upon the material's response to deformation and its intrinsic resistance to failure. Nano-indentation is …
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Gates and Latches: the mechanochemistry of ATP binding in kinesin 1 and Eg5
This thesis explores the role of mechanochemistry in two biological systems. The first system investigated involves cargo transport along microtubule filaments by Kinesin 1. A gating mechanism is needed to coordinate ATP binding to the two catalytic domains within Kinesin 1 in order to prevent …
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Rhenium, osmium and iridium diborides by mechanochemistry: Synthesis, structure, thermal stability and mechanical properties
Borides are implemented in a range of industrial applications due to their unique mechanical, electrical, thermal and catalytic properties. In particular, transition metal diborides are of special interest. In the recent years, borides of rhenium (Re), osmium (Os) and iridium (Ir) have been studied …
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Azomethine-Containing Moieties for Simple and Degradable Conjugated Polymers
… (DHPPs), as well as solvent-free mechanochemistry to synthesize dibrominated monomers amenable to robust Suzuki polycondensations. Monomer preparation through mechanochemistry has the added benefit of reducing the need for non-renewable and energy-intensive solvents as well as the …
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Development of Novel Slow-Release Micronutrient Fertilizers Using Mechanochemical Synthesis
… the development of B and Mo fertilizers using mechanochemistry with the aim to produce micronutrient fertilizers or micronutrient-enriched macronutrient fertilizers which would display a range of solubilities of B and Mo and reduce wasteful losses of these nutrients through leaching in …
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A quantitative and predictive model for mechanochemical kinetics and its experimental validation
… did not. Truly taking advantage of all that mechanochemistry offers for the design of novel mechanoresponsive and actuating materials requires a clear conceptual framework describing how and why mechanical force affects chemical reactivity. This work describes the development of such a model …
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Calcium oxide-based sorbents for CO2 capture at high temperature
… two less common synthetic approaches, mechanochemistry and ultrasonic spray pyrolysis (USP), were utilized to prepare highly stable CaOcontaining sorbents for CO2 capture. The mechanochemical approach is as an example of top-down synthesis of materials, while spray pyrolysis is …
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Novel Regulatory Mechanisms of Cytoplasmic Dynein: A Role for the Complex Base
… motor domain and models for dynein stepping and mechanochemistry based on single molecule studies. Despite this progress, little is known about the structure and coordination of functions at the base of the dynein complex, where nearly all interactions with regulatory and recruitment proteins …
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Mechanochemical transformations: Bridging the gap between global and local kinetics
… rooted in metallurgy and materials science, mechanochemistry is presently one of the most rapidly growing research subjects in chemistry. Mechanochemical reactions are generally performed in ball mills, where the powders are subjected to forging events during individual collisions. Precisely …
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The synthesis, design and study of new Type 3 porous liquids
… interesting MOF based chemistry where the use of mechanochemistry allowed for the formation of defects which led to the MOFs having increased gas capacity and selectivity. The process of drug inclusion in MOFs were also investigated and the effects of using a size excluded solvent in the loading …
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The synthesis and studies of type II porous liquids
… an alternative synthetic route to BB4+ using mechanochemistry, specifically ball milling. Interestingly, it has been found that the mechanochemical synthesis does not form the desired BB4+ molecule but instead most likely a polymer, specifically a xylene-bridged polyviologen. Nonetheless, the …
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Force-induced mechanochemical reactions in polymeric systems
… from starting materials. In the field of mechanochemistry, the energy from mechanical force is harnessed to induce and direct chemical reactions. One focus of the research presented investigates the spiropyran (SP) mechanophore (force-sensitive molecule) incorporated into different polymer …
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Mechanophore activation at heterointerface and surface crowdedness as a determining factor
… productive use of mechanical force in polymer mechanochemistry around the topic of mechanophore, a molecular unit that chemically responds in a selective manner to a mechanical perturbation, design and development. Most of the research is focused on mechanophore embedded polymers. However, …
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Sistemi e dispositivi meccanici applicati a processi fisici e chimici
… reactors and the improvement of existing ones. Mechanochemistry is the branch of Chemistry that relates to the effects of nonhydrostatic stresses and plastic strain on the chemical reactivity of molecules, crystals, and other aggregates of matter. Mechanochemical transformations occur on a local …
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Polymer architecture effects on mechanochemical reactions
… mechanophores. An overarching theme in polymer mechanochemistry is that the polymer chains are the link between macroscopic energy and the mechanophore. Therefore, polymer architecture is thought to play a significant role in influencing these types of mechanochemical reactions in polymers. This …
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Towards Glasses from Two-Dimensional Hybrid Organic–Inorganic Perovskites
… throughout the thesis. Chapter 4 introduces mechanochemistry as a rapid, green, and efficient alternative to conventional melt-quenching for HOIP glass formation. Both (S−NEA)2PbBr4 (meltable) and its racemic analogue (non-meltable) are shown to undergo direct crystal-to-glass transformation …
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