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 102 for “"Photoactive"”.
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Synthesis and Characterization of Tailored Photoactive Macromolecules
… polymer chain ends or side groups to synthesize photoactive macromolecules and gain the ability to reversibly control molecular weight and crosslink density using UV light. The cinnamates and coumarins were reacted onto the polymers via multiple reaction pathways. Polymers were functionalized …
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Photoactive metal complexes for studying amyloid-β aggregates
Amyloid-β is a short peptide produced in the brain, which self-assembles into large aggregates. This process is known to be involved in the development of Alzheimer’s disease. Because of this link, there is a significant interest in developing probes that are capable of sensing and reporting on …
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PHOTOACTIVE HYBRID GRAPHENE-BASED POLYMERIC MATERIALS FOR WATER PURIFICATION
The combined challenges of growing population, climate change and increasing lack of raw materials are leading to paramount innovation in the design of novel devices providing more and more environmentally sustainable solutions. After clay and nanotubes, graphene and its derivatives have become …
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Novel Approaches to Photoactive Nanostructured Materials for Efficient Solar Cells
Con l'attività di ricerca, riportata in questa tesi di Dottorato, ho fornito, alle questioni concernenti il fotovoltaico, i seguenti contributi: 1.Ricerca e sviluppo di un semplice metodo di sintesi di semiconduttori nanostrutturati, con una morfologia particolarmente adatta all'assorbimento …
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Design and synthesis of photoactive molecules based on metal dithiolenes
This work reports on the design, synthesis and characterization of some homoleptic and heteroleptic d8 metal (Ni, Pd, Pt) dithiolene complexes. Chapter 1 provides the background required to properly design metal dithiolenes exhibiting desired properties. Chapter 2 describes the synthesis & …
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Design, Synthesis, Photochemical and Biological Evaluation of Novel Photoactive Molecular Switches
… and cytotoxic evaluation of a novel family of photoactive molecules based on metronidazole. Finally, in Chapter 7 it is described the synthesis and study of new derivatives which belong to a new and almost unexplored family of molecular switches based on Donor and Acceptor Stenhouse Adducts …
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Design and investigation of novel photoactive liquid crystalline organic-inorganic hybrids
… design, synthesis and characterization of novel photoactive liquid crystalline silsesquioxanes. The investigations carried out include the initial design, chemical synthesis and characterization, photochemical properties, liquid crystalline behaviour and optical properties.The new materials were …
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Fabrication of solution-processed photoactive polymer- and halide perovskite-based solar cells
In the current work, different architectures and photoactive materials have been investigated in order to fabricate low-temperature solution-processed solar cells using dip and spin coating methods. Inverted bulk heterojunction structure has been utilised in fabrication of polymer solar cells using …
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Excited State Dynamics of Trans-Cis Photoisomerization in Photoactive Yellow Protein Chromophores
As an efficient and accurate quantum chemical method for photobiological and condensed phase applications, pseudospectral time-dependent density functional theory (PS-TDDFT) is presented, which alleviates the O(N4) scaling problem in two-electron integral calculations. For the test cases in this …
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Photochemistry, photophysics and spectroscopy of redox states of flavins relevant to photoactive flavoproteins
There has been a tremendous interest in the study of flavins and their derivatives in order to gain information valuable for designing model compounds that can mimic the functions of flavoenzymes. This thesis aims a) to explore and enhance the knowledge about the behavior of the flavin cofactors in …
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A synthetic and computational approach to the design of new photoactive organometallic materials.
Chapter one serves as an introduction to organometallic chemistry, specifically metal carbonyl complexes. The principles of photophysics are also introduced. This is followed by an outline of the techniques of matrix isolation and time-resolved infrared (TRIR) spectroscopy. The rapidly developing …
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Novel infrared spectroscopic techniques for the study of adsorbed proteins on photoactive thin films
… nanoporous gold film confining layers and photoactive nanocrystal cadmium telluride (CdTe) thin films, a system capable of in situ study of adsorbed protein films on photoactive layers was created. Due to the oxygen intolerance of the enzyme of interest for this work (a [FeFe]-hydrogenase …
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Electron transfer and energy transfer in photoactive and electroactive molecules in solution and at interfaces
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.
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Design and Synthesis of Photoactive Metal-Organic Frameworks for Photon Upconversion and Energy Transfer Studies
The synthesis, characterization and photophysical properties of three Zr-based Metalorganic frameworks (MOFs) assembled from 2,6-anthracenedicarboxylic acid (2,6-ADCA, 2,6- MOF) and 1,4-anthracenedicarboxylic (1,4-ADCA, 1,4-MOF), and 9,10-anthracenedicarboxylic acid (9,10-ADCA, 9,10-MOF) are …
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A 'Toolkit' of Small Molecules for Polymer Assembly and Post-Synthetic Modification Using 'Click' and Photoactive Chemistries
… the design, synthesis, and implementation of a photoactive 'click' activator for polymer surfaces. This chapter extends the notion of a material-specific anchor from hard substrates to a range of soft polymer substrates. Chapter 4 is an inquiry into the nature of the photoreaction of a standard …
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Towards unveiling the Photoactive Yellow Proteins: characterization of a halophilic member and a proteomic approach to study light responses
The family of blue-light absorbing Photoactive Yellow Proteins (PYPs) has become an attractive model system to study the molecular events related to light perception. PYP covalently binds a p-hydroxycinnamic acid chromophore, which is fine-tuned for efficient light absorption and initiates a …
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