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 95 for “"Organic ligands"”.
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Metal complexes of selected organic ligands containing sulphur and phosphorus
… chelating properties of six sulphur and oxygen ligands and five phosphoryl sulphur and oxygen ligands with nickel(ll) and coba lt(ll) halides. Thirty two complexes of nickel(II) and cobalt(ll) halides were prepared and are reported in this thesis. The ligands used in the investigation are 1. …
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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 use of organic ligands to study the molecular mechanisms of angiogenesis and immunoregulation
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Investigation of Lead Hydrolytic Polymerization and Interactions with Organic Ligands in the Soil/Sediment-Water Environment
… fully characterized and extracted by aqueous and organic solvents. The results were compared and evaluated with the metal speciation model, MINTEQA2. Hydrolytic polymerization and organic complexation studies were conducted with standard lead solutions under controlled experimental conditions. …
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EFFECTS OF COMPLEXATION WITH THE SIDEROPHORE DESFERRIOXAMINE B ON TRANSITION METAL REMOVAL FROM SEAWATER
Complexation of transition metals with strong organic ligands of unknown structure and origin plays an important role in their behavior and distributions in seawater. I present here a series of stability constants for complexes of several transition metals with the trihydroxamate siderophore …
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Exploring and enhancing conductivity in semiconductor nanoparticle films
… synthesis are suspended in solution by the organic ligands which passivate the NC surface after synthesis, and NCs can be deposited from solution to form NC solids. In theory, 'designer solids' having different electrical properties can be formed by changing, and even mixing, the types of …
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A study of the dissolution of atmospherically derived trace metals into North Atlantic seawater
… pH, dissolved oxygen concentration and organic ligand amendments on aerosol and rainwater trace metal dissolution. Results for aerosol leaching experiments revealed that changes to key physico-chemical conditions had little effect on the amount of Mn, Fe, Co, Ni and Pb leached from …
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Compuestos de coordinación de iones de metales de transición con ligandos heterocíclicos dadores de S,N
… studied the synthesis and characterization of organic ligands with thiazoline and thiazine derivatives and their coordination ability with several metallic ions (Co2+, Cu2+, Zn2+, Cd2+). The compounds have been characterized through elemental analysis, IR, UV-Vis-NIR diffuse reflectance, EPR, …
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Hydro/Solvothermal Synthesis, Structures and Properties of Metal-Organic Frameworks Based on S-Block Metals
… emissions implicated in global warming. Metal Organic Frameworks (MOFs) promising potential applications in carbon dioxide capture due to their unique structural properties such as high porosity and high thermal stability. These MOFs have application in separation processes and gas storage. By …
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Synthesis and Characterisation of Porous Mixed-Ligand Metal-Organic Frameworks for Sorption Studies
Metal-organic frameworks (MOFs) have been identified as promising physisorption candidates because of their unique structures. MOFs are a class of crystalline materials consisting of coordinate bonds between metal ions and organic ligands. The permanent porosity of MOFs enables them to be applied …
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Molecular characterization of organically bound copper in the marine environment
… shown that a diverse array of microbes produce organic ligands that complex Cu (CuL) and buffer the free ion concentration, which is the most bioavailable fraction. In this way, the microbes impose a control on the speciation of Cu, decreasing the toxic effects of Cu and making seawater …
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Molecular Characterization of Organically Bound Copper in the Marine Environment
… shown that a diverse array of microbes produce organic ligands that complex Cu (CuL) and buffer the free ion concentration, which is the most bioavailable fraction. In this way, the microbes impose a control on the speciation of Cu, decreasing the toxic effects of Cu and making seawater …
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The Influence of Oxyanions on the EDTA-Promoted Dissolution of Goethite
Organic ligands, such as EDTA, accelerate the dissolution of silicate and oxide minerals. In natural systems oxyanions can compete with organic ligands for mineral surface sites thereby affecting ligand-promoted dissolution rates. Oxyanions can either enhance or inhibit dissolution depending upon …
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NEW MULTIMETALLIC ASSEMBLIES AS PHOTOLUMINESCENT MATERIALS
… of d-block metals and ditopic tridentate organic ligands. The overall aim of this project was to extend the knowledge in this area to Ln(III)-containing soluble supramolecular metallo-polymers and to study their overall photophysical properties.
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Geochemical Behavior of the Rare Earth Elements in Natural Terrestrial Waters
… (1) solution complexation of REEs with both inorganic and organic ligands in natural terrestrial waters; (2) the geochemical behavior of REEs along the groundwater flow paths in two different aquifer types (i.e., sand vs. carbonate); and (3) surface complexation behavior of REEs in the Carrizo …
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Synthesis and Structures of New Three-Dimensional Copper Metal-Organic Frameworks
<p>Metal-organic frameworks (MOFs) are crystalline materials with metal ions covalently bonded to organic ligands. The ligands act as spacers often creating a porous structure with very high pore volume and surface area. MOFs are known for their robust structures, high porosity, and different …
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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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Complexes of iron (III) with derivatives of 8-quinolinol
The organic ligands 5- and 7- methyl-8-hydroxyquinoline have been synthesised and shown to form green, water soluble, 1:1 complexes with iron(III) and thus to possess the same composition as the complexes with 8-hydroxyquinoline and 2-methyl-8-hydroxyquinoline previously reported. Thermodynamic …
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Preparation and Investigation of Group 13 Metal Organo-Phosphate Hybrid-Framework Materials
… this field is focused on synthesizing hybrid inorganic-organic compounds, which combine inorganic species as nodes and organic species as linkers. These materials have been demonstrated to have versatile structures and show promising properties for applications in the areas of separation, …
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