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 61 for “"photosensitizer"”.
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Vibrational spectroscopy of photosensitizer dyes for organic solar cells
… ligands are intensely investigated as potential photosensitizers in organic solar cells. Of particular interest is their use in dye-sensitized solar cells based on nanocrystalline films of TiO2. Functional groups of the dye allow for efficient anchoring on the semiconductor surface and promote …
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LS301 Fluorescence-guided Photodynamic Therapy of brain cancer using PpIX photosensitizer
… surgery and as well as acts as a photosensitizer for photodynamic therapy (PDT). However, the accurate tumor delineation using PpIX is limited by autofluorescence and superficial penetration depth. LS301 is a tumor-targeted near-infrared (NIR) contrast agent developed in our lab …
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Development of Iridium Based Photosensitizer for Potent Photoreductants and Photocatalytic Application
… the development of iridium based organometallic photosensitizers which function as potent photoreductants for photoredox catalysis. Chapter 1 describes the basic concepts of photosensitizers in photocatalysis and strategies to modify the photophysical and electrochemical properties via ligand …
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Singlet Oxygen Production and Its Kinetics in Nanoparticle-Photosensitizer Hybrid Systems
… of singlet oxygen from light-activated drugs (photosensitizers) has been used to various degrees in photodynamic therapy to remove cancerous tumors, and in photodynamic inactivation of microorganisms to eliminate harmful pathogens. In the last decade, nanomaterials have emerged as a promising …
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Photosensitizer Loaded Contact Lenses As An Externally Stimulated Ophthalmic Drug Delivery System
… and characterization of Eosin Y (a model photosensitizer) liposomes loaded p-HEMA hydrogel films and its in vitro release profile triggered by an external stimulus (Argon Ion Laser). |A validated HPLC method was developed for quantification of Eosin Y in aqueous medium as per USP …
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Syntheses of a Tin (IV) meso-Tetra(4-pyridyl) Porphyrin Dichloride-Tetrachlorobis (Bipy)2 Ruthenium (II) Complex and Studies of Photophysical Properties of 1-Nitropyrene
<p>Development of a photosensitizer that can work in both aerobic and anaerobic environments would increase the robustness of the cancer treatment known as photodynamic therapy. The development of a photosensitizer was first attempted by synthesizing a tin (IV) meso-tetra (4-pyridyl) porphyrin …
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The investigation of kairomones and photosensitizers affecting Liriomyza bryoniae (Diptera, Agromyzidae) /
… friendly, non-toxic photoinsecticides (photosensitizers). Knowing that tomato leafminers locate and recognize the suitable host-plants by plant-emitted volatiles, such plant-origin compounds (kairomones) could be used for insects’ attraction to the bait with photosensitizer. The aim of …
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Earth-Abundant Metal Complexes Binding N-Heterocyclic Carbene-Based Ligands for the Photocatalytic Carbon Dioxide Reduction Reaction
… and absence (self-sensitized) of an external photosensitizer. The ability of these Ni(II) CNC pincer complexes to reduce CO2 into formate and CO without an external photosensitizer is attributed to the unusual long-lived excited state lifetime of these complexes in a microsecond range, as …
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A Role For Reactive Oxygen Species In Photodynamic Therapy
… irradiation at a wavelength corresponding to a photosensitizer absorbance band excites the photosensitizer molecules, leading to energy transfer reactions and fluorescence. It was initially concluded that the phototoxic effect occurred when energy from the excited state of the photosensitizer …
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Antimicrobial Photodynamic Therapy in Clinical Dentistry: Unravelling the Mechanisms and Exploring Hidden Benefits
… of aPDT, influencing factors related to both the photosensitizer and the light delivery system, current challenges as well as new technologies-strategies for overcoming them, have been thoroughly discussed. Until today, there are no clear recommendations regarding the applied aPDT protocol, and …
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Photodynamically Activated Multifunctional Chitosan Nanoparticles to Disinfect and Improve Structural Stability of Dentin
… polymeric nanoparticle functionalized with a photosensitizer may present as a single step treatment to achieve both the objectives. Chitosan a bioactive polymer was used owing to their inherent antibacterial and biocompatible characteristics. Chitosan micro-/nanoparticles were synthesized as …
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METAL NANOSTRUCTURES-ENHANCED AIE-BASED PHOTOSENSITIZERS FOR PHOTODYNAMIC THERAPY
… (PDT) is a non-invasive technique, based on photosensitizer molecules, that has been extensively used for therapy of different non-oncological diseases and various cancers. However, traditional photosensitizers are suffering from aggregation-caused quenching (ACQ) effect, due to π-π stacking. …
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A Multifunctional Solution Composed Of TMPyP, 1,5-DHN, And Fe(III) Ions That Produces Reactive Oxygen Species (ROS) In Aerobic, Anaerobic, And H2O2 Environments
… over the past several decades. PDT utilizes a photosensitizer, visible light, and oxygen, to produce reactive oxygen species (ROS) which can be used to treat cancer and inhibit growth of bacteria. In this study, a multifunctional solution that is comprised of Fe(III) ions, cationic …
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THE DEVELOPMENT OF SELECTIVE PHOTOSENSITIZERS TO TARGET PATHOGENIC T CELLS AND PREVENT GRAFT-VERSUS-HOST DISEASE
… work presented here, we have created a series of photosensitizers with the ability to target oxidative phosphorylation (OXPHOS) in pathogenic and malignant T cells. The photosensitizers are also potent stimulators of P-glycoprotein (P-gp). Enhanced P-gp activity promotes the efficient removal of …
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Naujo tetrakatijoninio porfirino sukeltos Escherichia coli fotopažaidos /
… three initially harmless components (the oxygen, photosensitizer and appropriate light) has fatal consequences to bacteria. The study was designed to investigate spectroscopic features of a new tetra-cationic meso-substituted photosensitizer tetrakis(N-ethylpyridinium-4-yl)porphyrin tetratosylate …
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Light and nanoparticle-based approaches to the control of ion channels and drug delivery
… and targetable nanocarrier, and used an embedded photosensitizer to combine the power of targeted delivery with the spatiotemporal control of light activation. NP-mediated endosomal disruption can be controlled at the single vesicle level. As an example, we delivered a cell-impermeable fluorescent …
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Harnessing solar energy: vapor phase polymerized poly(3,4-Ethylenedioxythiophene) for solid state dye-sensitized solar cells and the photodegradation of organic toxicants
… solid state DSSCs is the interaction between the photosensitizer dye and the solid state nelectrolyte acting as the hole transport layer. Since VPP occurs in the vapor phase, it has the potential to penetrate the mesoporous titanium dioxide (TiO2) which can improve the interaction between the dye …
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From practice to theory: computational studies on fluorescence detection and laser therapy in dermatology
… thickness of the target, the concentration of photosensitizer in the target, and the concentration of photosensitizer in the skin. My findings confirm previous clinical studies in that the auto‐fluorescence corrected fluorescence detection method generally shows a higher contrast than the other …
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Understanding the singlet oxygen reactivity of salarin C through synthesis of a simplified macrocyclic analogue; multicomponent, enantioselective organocatalytic synthesis of tetrahydropyridazinones.
… known typically requiring UV irradiation and a photosensitizer to generate singlet oxygen, salarin C undergoes this transformation without the need for a photosensitizer. Through the synthesis of a macrocyclic model of salarin C, we determined that the macrocyclic conformation of the oxazole is …
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St John's Wort photomedicine for Melonoma
… of photodynamic therapy (PDT) comprises a photosensitizer, light and molecular oxygen. Following cellular uptake of the photosensitizer, its activation by light produces reactive oxygen species in the presence of oxygen. The resulting cytotoxic oxidative stress elicits cancer cell death by …
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