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 12 of 12 for “"photoswitching"”.
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Visible light-induced pH control and its applications
… state of the merocyanine form (MCH vs MC) on the photoswitching efficiency. A python model is developed to describe the pH- recovery in the dark. Chapter 3 introduces an improved merocyanine photoacid, designed by principles outlined in Chapter 2. The acidity parameters and photoswitching …
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Towards novel photoswitches for applications in organic electronics
… down key groundwork for the final chapter as the photoswitching is studied and optimised in chapter 3. In the final chapter, we propose the incorporation of the DHP molecule to be directly incorporated into a DPP based polymer. This polymer has potential in organic electrochemical transistors …
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Design, Synthesis, Photochemical and Biological Evaluation of Novel Photoactive Molecular Switches
… is presented. Moreover, it is compared the photoswitching process of this family of switches by means of different electronic states (singlet or triplet state). In Chapter 6 it is described the synthesis, photochemical properties and cytotoxic evaluation of a novel family of photoactive …
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Sensing in biological systems
… the sensor is stable after multiple cycles of photoswitching, without any sign of photodegradation. Such properties are of real advantage for cell-based sensing applications. An interesting observation is that, Py-1 presents with two excitation options; direct green excitation (532 nm) of the …
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Development of Stimulus-Responsive Ligands for the Modulation of Copper and Iron Coordination
… the tunable nature of several aroylhydrazone photoswitching properties.</p><p>Ongoing efforts in this laboratory seek to develop compounds called prochelators that exhibit a switch from low to high metal binding affinity upon activation by a stimulus of interest. In this context, we present …
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Developing photoresponsive lipid nanoparticles for the triggered release of small molecules
… methods used to study release. Keywords: DASA, Photoswitching, Liposome Nanoparticle, Cholesterol-DASA conjugate, Triggered release
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Interaction of azobenzene containing surfactants with plasmonic nanoparticles
… and combine simultaneously plasmonic and photoswitching properties to different nano-objects. In this thesis I investigate the complexes between noble metal nanoparticles and cationic surfactants containing azobenzene units in their hydrophobic tail, employing absorption spectroscopy, …
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Control of Network Topology in Photopolymer Networks for Additive Manufacturing
… robust polyMOC serves as a template. Subsequent photoswitching to the Cu(I) state crosslinks the precursors and re-oxidation provides MOC-interpenetrating networks (MINs). In addition, the Cu(II) polyMOC can be completely removed with competing ligands to expose the nascent covalent network.
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Enhancing thermal isomerization rates of redox auxiliary-appended azobenzenes via redox auxiliary catalysis
… is unideal when fast dynamics is desired. ZE photoswitching is typically incomplete, leaving a significant percentage of molecules in the Z conformation. The Blackstock group has covalently attached an easily oxidized aryl amine “redox auxiliary” (RA) to the azobenzene scaffold to facilitate …
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EVOLUTION AND CHARACTERIZATION OF A NEW REVERSIBLY PHOTOSWITCHABLE CHROMOPROTEIN
We report the molecular engineering and spectral characterization of a new reversibly photoswitchable chromoprotein, B11 a variant of thermostable green protein (TGP) that has been evolved for favorable solubility, thermostability, and enhanced crystallization properties. Its 2.5 \xc5 joint X-ray …
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The Design, Preparation and Characterisation of Light-Responsive Pickering Emulsions
… properties of both families show successful photoswitching and, for arylazopyrazoles, an exceptionally high photostationary state (>90 %) and half-lives as long as 24 days. The photoswitchable molecules are then appended to fumed silica particle at three different grafting concentrations. The …
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Azobenzenes for the development of therapeutics
Azobenzenes are photochromic molecules, commonly utilised for their ability to undergo light-mediated isomerisation. This unique property enables them to modulate biological systems upon their incorporation. Chapter 1 explores the utilisation of azobenzenes for peptide stapling, that has gained …