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 31 for “"organic ligand"”.
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Interaction of amphiphilic gold nanoparticles with lipid membranes and their application to cancer radiotherapy
Striped gold nanoparticles (NPs), inorganic particles protected by an amphiphilic mixed organic ligand shell, are the most recent and potent evolution of gold nanoparticle intracellular delivery vectors. Here we propose the combination of striped gold nanoparticles with lipid vesicles of diameter < …
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Metalloid aluminum clusters with fluorine
… a mixture of low-valence metals as well as organic ligands. Here we investigate a prototypical aluminum metalloid cluster to determine system stability if the organic ligand contains significant amounts of fluorine. The fluorine can, in principle, oxidize the metallic elements, resulting in …
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Plasmonic gold nanostructures: optical properties and application in mercury detection
… Hg2+ binding to immobilised gold nanoparticle-organic ligand hybrid structures and amalgamation of single immobilised gold nanorods upon chemical and upon electrochemical reduction of Hg2+ ions. The amalgamation approach showed large potential with extraordinary shifts of the nanorods’ …
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Structural studies of coordination networks based on multitopic organic ligands and silver(I) salts
… on the complexes of silver(I) with multitopic ligands, certain recurrent relationships have been identified between topicity of the organic ligand and the network connectivity that can be used as guidelines for the construction of supramolecular structures. When crystallized from non-polar …
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The relationship between iron and nitrogen fixation in Trichodesmium spp.
… that most dissolved Fe in seawater, including organic ligand-bound Fe, is available to Trichodesmium. These data support and refine previous model predictions and demonstrate, in situ, the importance of Fe to the marine N cycle.
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The relationship between iron and nitrogen fixation in Trichodesmium spp.
… that most dissolved Fe in seawater, including organic ligand-bound Fe, is available to Trichodesmium. These data support and refine previous model predictions and demonstrate, in situ, the importance of Fe to the marine N cycle.
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Influence of Iron Speciation on Redox Cycling and Reactivity With Persistent Organic Contaminants
… FeII/FeIII complexes with low molecular weight organic ligands were used as surrogate models for studying iron-mediated redox processes. Initially, the redox reactivity of Fe II-organic ligand complexes with nitro-organic explosives was investigated. Ligand-screening experiments demonstrate that …
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Decoupling of iron and phosphate in the global ocean
… onto sinking particles and complexation with an organic ligand. The iron cycle is coupled to a model of the phosphorus cycle. The aeolian source of iron is prescribed. This system is examined in the context of a highly idealized box model. With appropriate choice of parameter values, the model …
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DESIGN AND SYNTHESIS OF STAINLESS-STEEL NANOPARTICLES: OXIDATION BEHAVIOR AND MORPHOLOGICAL EVOLUTION
… analysis via thermogravimetric analysis (TGA), organic ligand characterization using infrared spectroscopy (FTIR), and absorption spectra using UV-visible spectroscopy (UV-Vis). In chapter 2, synthesis of mixed shell Fe/Cr/Ni, Fe/Ni/Cr, and Fe/CrxNi1-x core/alloy nanoparticles (CA-NPs) is …
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Functional Nanocomposites Formed by Two-step Back-filling Methods
… of nanocomposite materials comprised of inorganic nanocrystals (NCs) combined with a complementary organic compound utilizing sequential two-step synthesis methods. We demonstrate an enhancement in the mechanical and optical properties of electrophoreticially deposited (EPD) cadmium …
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Development of N-heterocyclic carbene ligands for nanomaterials in aqueous media and expanding the interface of metal-organic framework (MOF) and polymer chemistry via polyMOFs
… coordination chemistry, there are many standard organic ligand designs that are optimized for their ease of synthesis as well as established and favorable properties. Nevertheless, there is still room to add new ligand classes to the toolbox for specific applications. This thesis focuses on …
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The synthesis, characterisation and photochemistry of novel organometallic complexes
Complexation of an organic ligand by a transition metal can radically alter the ligand photochemistry. In order to investigate these effects, we synthesised a series of organometallic complexes with several different modes of ligand-metal bonding. The synthesis of various cyclopentadienyl, arene, …
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Studies on photochromic and potentially mesogenic mercury(II) dithizonates
… attributed to the geometry of the dithizonate ligand. The organomercury(II) dithizonates were photochromic in organic solvents, displaying reversible colour changes from yellow to blue on irradiation with visible light. The visible absorption spectra of these solutions were recorded and …
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Photophysical Properties of Anthracenic Metal Organic Frameworks
Luminescent metal organic frameworks (MOFs) are promising new materials with applications as sensors, photocatalysts, and other luminescent devices. Although MOFs retain the chemical and physical properties of their constituents, the properties of the MOF are often altered from those of its …
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NEW GO- AND RGO-BASED MORALS AND CARBENE-FUNCTIONALIZED GOLD NANOPARTICLES FOR HETEROGENEOUSLY CATALYZED REDUCTIONS
… The first one is MORALs, an acronym for Metal-ORganic ALloys, a class of materials composed of organic molecules embedded in metal particles. In previous studies, this class of materials has been reported to exhibit improved catalytic properties compared to the single metal or organic molecule …
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Thermodynamics of ionic liquid solvents in gas purification and exfoliation mechanisms: molecular dynamics simulation and Monte Carlo calculations
… using (pyromellitic dianhydride) PMDA as an organic ligand. For the first time, these polymers, “ionic polyimides” (i-IPs), were computationally investigated as a potential membrane for CO2 separation. The presence of the IL significantly displaces the CO2 molecules from the ligand nitrogen …
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Design, Synthesis and Evaluation of Organic and Metal Based Antimicrobial Agents
… dichlorides and their complexes with the ligands 1,10-phenanthroline (phen), 1,10-phenanthroline-5,6- dione (dione) and dipyrido[3,2-a:2’,3’-c]phenazine (dppz) were also carried out. Of the compounds synthesised, the dibutyltin(IV) derivatives exhibited the broadest range of activity in …
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Crystal engineering of mixed-ligand metal-organic frameworks
… The synthesis and characterisation of metal organic frameworks (MOFs) have attracted widespread attention owing to their potential in various applications. This includes gas sorption, which could aid in alleviating serious environmental issues such as global warming by sequestrating …
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α-Amanitin-based Small Format-Drug Conjugates for Prostate Cancer Therapy: Enabling Anti-Tumor Activity by Tuning Pharmacokinetic Properties
… Conjugates (SMDCs) which utilize small organic ligands as tumor-homing vehicles are recently gaining growing attention due to their potential better tumor-penetrating properties. The first part of the present study (Chapters 3-5) describes the design and preclinical characterization of a …
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On Metal synthesis of Some Substituted Rhenium and Manganese Complexes
<p>Heterocyclic organic and organometallic compounds (i.e. polypyrrole), and their derivatives, have been of great interest for conductive polymers due to their novel properties and environmental stability as compared to their non-aromatic analogs (i.e. polyacetylene). Our current interest focus …
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