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.
Results
Showing 1 to 18 of 18 for “"photoswitches"”.
-
Towards novel photoswitches for applications in organic electronics
… devices based on organic materials are novel photoswitches. These are molecules that are able to undergo a reversible structural change under a light stimulus which gives rise to unique properties. Thus, it allows the control of properties via the use of light in a variety of applications. The …
-
Photo Control of Protein Activity Using Genetically Encoded Photoswitches
Many biological processes are governed by protein activities that are spatially and temporally regulated. Where (i.e.: in a particular cell type or subcellular organelle) and when (i.e.: in relation to a cue, or for what duration) a protein is active can dictate its biological role. Photo-control, …
-
Development of new adaptive materials based on spiropyran molecular photoswitches
Spiropyrans are a family of photochromic compounds that can be reversibly switched between two states: a colourless, non-polar, uncharged spiro form (SP) and a highly coloured, polar, conjugated, zwitterionic merocyanine form (MC), i.e. SP → MC (UV light), MC → SP (green, white light). Furthermore, …
-
Molecular Photoswitches: Towards the Rational design of Donor-Acceptor Stenhouse Adducts and Photoswitchable Transmembrane Peptides
Esta tesis está enfocada en mejorar las propiedades fotocromáticas de interruptores moleculares tipo DASA (donor-acceptor Stenhouse adduct) y en lograr fotocontrolar por primera vez péptidos transmembrana utilizando azobencenos. En concreto, la presente tesis se divide en siete capítulos. El primer …
-
Towards sustainable heterogenous catalysis in molecular solar thermal energy storage (MOST) systems
… A review of the most relevant literature of photoswitches, especially relating to the class of NBD/QC molecules is undertaken, concerning their history, synthetic design strategies applied and their applications. This review is intended to serve as a reference for the subsequent chapters. In …
-
Design and Modular Optimization of Components in Molecular Solar Thermal (MOST) Systems
… storage systems, a technology based on molecular photoswitches capable of capturing solar energy and storing it as chemical bond strain energy. The work specifically addresses the challenges associated with the norbornadiene/quadricyclane (NBD/QC) couple, focusing on the optimization of the …
-
Engineering of Light-Gated Artificial Ion Channels
… pharmaceuticals and drug delivery systems, as photoswitches, and in the field of microfluidics.
-
The Design, Preparation and Characterisation of Light-Responsive Pickering Emulsions
… particles functionalised with azobenzene-derived photoswitches to understand the key factors that determine the characteristics of light-responsive Pickering emulsions. We address their design on three distinct length scales: the photoswitch at the molecular level, the photoswitchable particle at …
-
Design, Synthesis, Photochemical and Biological Evaluation of Novel Photoactive Molecular Switches
… 4, it is studied a new family of molecular photoswitches based on arylidene-hydantoins together with their synthesis, photochemical and photophysical studies. In Chapter 5, the study of new derivatives based on PSB-retinal is presented. Moreover, it is compared the photoswitching process of …
-
Molecular Optoelectronics in Plasmonic Nanocavities
… the integration of diarylethene (DAE) photoswitches into these plasmonic nanostructures is explored, offering new possibilities for light-controlled molecular devices. This research advances our understanding of quantum plasmonic effects, plasmon-induced hot electron generation, and …
-
Light-induced transformations in biomembranes
… establish a regulation path based on the use of photoswitches exhibiting conformational changes in model membranes, namely, giant unilamellar vesicles (GUVs). The mechanism of the changes in the GUVs’ morphology caused by isomerization of the photosensitive molecules has been previously explored …
-
Quantum mechanical study of molecular switches : electronic structure, kinetics and dynamical aspects
Molecular photoswitches are attracting much attention lately mostly because of their possible applications in nano technology, and their role in biology. One of the widely studied representatives of photochromic molecules is azobenzene (AB). With light, by a static electric field, or with tunneling …
-
A Green Light at the Intersection of Metal-Organic Frameworks and Drug Delivery
… of visible light-responsive azobenzene photoswitches. A green light-responsive MOF (UiO-AZB-F) containing a 4,4ʹ-(diazene-1,2- diyl)bis(3,5-difluorobenzoic acid) linker was developed as a drug delivery system for the treatment of colorectal cancer. Our work also focuses on optimizing …
-
Modeling Dark- and Light-Induced Crystal Structures and Single-Crystal Optical Absorption Spectra of Ruthenium-Based Complexes that Undergo SO2-Linkage Photoisomerization
… to consider more complexes, including both photoswitches and transducers. Periodic models are shown to appreciate the competing chemical and crystallographic forces present in these complexes, namely the possible effects of the trans-influence and intermolecular interactions on the simulated …
-
Design and applications of 4-yl-(methyl)coumarins and their derivatives
… and irreversible responses are known as photoswitches and photofuses, respectively. The o-nitrobenzyl photofuse, which was initially used as a biological caging group, has been utilized in various surface applications with great success. However, this photofuse can be problematic due to …
-
Thermal cis-trans isomerization of azobenzene studied by path sampling and QM/MM stochastic dynamics
Azobenzene-based molecular photoswitches have extensively been applied to biological systems, involving photo-control of peptides, lipids and nucleic acids. The isomerization between the stable trans and the metastable cis state of the azo moieties leads to pronounced changes in shape and other …
-
Probing the Ultrafast Dynamics of Higher-Lying Excited States of Molecular Switches with Femtosecond Stimulated Raman Spectroscopy
… through resonance Raman methods. Studying these photoswitches with various spectroscopic methods allows us to obtain a more detailed understanding of their optical control through higher-lying excited states.
-
Azobenzene-functionalized molecular glasses for holographic applications
… incorporating azobenzenes can be used as photoswitches, allowing fast and reversible control over the chemical, physical or optical properties of the entire system. Therefore, azobenzene-containing compounds are envisioned as smart light-responsive materials for various holographic …