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 20 of 49 for “"Copper complexes"”.
-
Tetraazamacrocyclic ligands and their copper complexes
… new types of tetraazamacrocycles and their copper(ll) complexes are described. Condensations of 4,8-diaza-2,3:9,10-dibenzoundecane-1,11-dione with a range of aliphatic and aromatic diamines has allowed the isolation of metal-free diimine macrocycles without recourse to metal template' or …
-
Electrocatalytic dioxygen reduction with copper complexes
… oxygen reduction reaction as electrocatalyzed by copper complexes. The second chapter focuses on two similar complexes, [CuTPA]2+ (TPA = tris(2-pyridylmethyl)amine) and [Cu2bistripic]2+ (bistripic = 1,2-bis(6-(bis(6-methylpyridin-2-yl)methyl)pyridin-2-yl)ethane). CuTPA reacts with dioxygen to form …
-
Copper complexes of dinucleating octa-azamacrocyclic ligands
… of mono and dinucleating ligands and their copper complexes are described. Three types of dinacleating tetraimine macrocycles have been prepared from 4,7-diaza-2,3;8,9-dibenzodecane-l,10-dione by condensation with the appropriate polyamine; I, large-ring octa-aza macrocycles e.g. the …
-
Diamino diamide copper complexes as anti-arthritic agents
… the investigation of a series of diamino diamide copper(II) complexes with respect to their potential as anti-inflammatory agents in the treatment of rheumatoid arthritis. Several physico-chemical techniques were employed in the investigation including glass electrode potentiometry, UV/VIS …
-
Copper Complexes Which Catalyze the Air Oxidation of Organic Substrates.
The oxidations of o-diphenols to corresponding o-quinones are known to be important reactions in some biological, industrial, and pollution studies. Proton magnetic resonance (pmr) and optical [visible (vis) and ultraviolet (uv)) spectroscopy are often the techniques of choice for studying the …
-
Synthesis and design of ligand copper complexes as anti-inflammatory drugs
… debilitating disease for which there is no cure. Copper has been used for centuries to alleviate the inflammation associated with the disease. The aim of this research was to design and test new ligands which are able to promote the percutaneous absorption of copper and/or mobilize endogenous …
-
The synthesis of sterically demanding ligands and examples of their copper complexes
… those of the unsubstituted analogs. Two new copper(I) N-heterocyclic carbene complexes containing the 2,4,6,2",4",6"-hexaisopropyl-1,1':3',1"-terphenyl moiety have been synthesized and isolated. The LCuCl complex (92% isolated yield) was made via a one-pot synthesis from the corresponding …
-
The chemical speciation of potential dermally-absorbed copper-based antiinflamatory drugs
It has been shown that increasing the amount of copper associated with low molecular weight ligands in plasma helps to alleviate the symptoms of rheumatoid arthritis (RA). Four low molecular weight ligands 1, 13-bis(N,N-dimethyl)-5,9-dioxo-7-(N-benzyl)- 1,4, 7,10, 13-pentaazatridecane (BID), its …
-
Synthesis and charaterisation of phosphorescent copper (I) complexes for light emitting devices
… technology is focused on organo-transition metal complexes, which emit from the triplet excited state and exhibit bright phosphorescence. Efficient in devices have been reported using these luminescent materials, such as iridium and platinum complexes, however, rare metal abundance concerns, high …
-
Copper(I) phenanthroline complexes and supramolecular systems containing fullerenes: Photophysics, photochemistry and potential applications in sustainable energy technologies.
… and fuels. We presented a new class of copper complexes, that could find application in lighting techhnologies, by serving as luminescent materials in LEC, OLED, WOLED devices. These technologies may provide substantial energy savings in the lighting sector. Moreover, recently, copper …
-
Synthesis of biologically active heterocyclic compounds
… gave highly efficient DNA crosslinking activity. Copper complexes were formed of the macrocycles and B was found to be 24 times more toxic against hypoxic cells than oxic cells thus exploiting tumour hypoxia and creating a selective drug. Jones synthesised a range of oxaazamacrocycles such as C …
-
Characterizing Ultrafast Equilibrium Dynamics Using Third-Order Nonlinear Mid-Infrared Spectroscopies
… on the ultrafast dynamics of a series of copper complexes were investigated. An azide group was attached to model copper complexes to serve as a vibrational probe. It was found that the peripheral phosphinimine ligands of the copper complex confined the orientational motion of azide and …
-
Spectroscopic and catalytic investigations of transition metal complexes intercalated in layered silicates
… The oxidative coupling of phenols catalyzed by copper complexes intercalated into smectite clay minerals show that this type of reaction can be made very selective, due to the environment of the interlamellar layer of the clay mineral. The oxidation of 2,6-dimethylphenol leads to a greater …
-
Lithium and indium quinoneoximic complexes and their application in scintillation counting
Several complexes of lithium derived from 1,2-naphthoquinone 1-oxime and 1,2-naphthoquinone 2-oxime have been prepared and characterised using analytical, spectroscopic and thermal gravimetric techniques. I.r. studies indicate that the ligands in these complexes are essentially quinoneoximic in …
-
Tuning the photophysical properties of amidophosphine complexes of copper
A series of monomeric copper complexes that allow for the tuning of the emission properties is reported. Luminescence lifetimes up to 150 [mu]s are observed in benzene solution at ambient temperature, which are comparable to the lifetimes of the longest-lived previously reported copper …
-
(N-heterocyclic-carbene)Copper(I)-catalyzed carbon-carbon bond formation using carbon dioxide
… iisopropylphenyl)-1,3-imidazol-2-ylidene) to give copper vinyl and copper alkyl complexes. These copper complexes insert CO2 into the Cu-C bond to form copper acrylate and copper carboxylate complexes. Acrylic and carboxylic acids can be isolated by hydrolysis. A catalytic cycle based on …
-
Investigation of copper(II) complexes: I Copper(II) complexes of tryptophan and its analogues as postcolumn interaction components for indirect fluorescence detection of amino-containing analytes II High-performance liquid chromatographic separation of copper(II) azamacrocyclic complexes
… phase of this project investigates the use of copper(II) complexes of tryptophan and its analogues for indirect fluorescence detection in high-performance liquid chromatography. First, indirect photometric and fluorometric detection in high performance liquid chromatography (HPLC) is reviewed, …
-
Synthesis and characterization of various coinage metal complexes with bridging diimine ligands
This thesis is a study of coinage metal complexes with various bridging diimine ligands. It has 75pp, 4 tables, 55 figures and the references for the study of group 11 elements. It discusses one main project divided by three chapters describing in general the synthesis; structure and spectroscopic …
-
Solution Properties of Some Iron and Copper Macrocycles.
… on iron(ll) phthalocyanine (FePc) and three copper macrocycle complexes. Concentrations of saturated solutions of FePc in pyridine, 2-methylpyridine, 3-methy1 - pyridine, and 4-methyl pyridine were determined from visible spectral data, and in dimethyl sulfoxide (DMSO) were obtained from …
-
Spectroscopic Examination of the Catalytic Decomposition of hydrogen Peroxide by a Copper (II) Complex of a Dissymmetric Schiff Base and an Imidazole Derivative.
<p>Previous studies involving copper (II) complexed with a dissymmetric Schiff base and imidazole derivatives had identified catalase activity of these complexes towards H<sub>2</sub>O<sub>2</sub>. Reactions such as this are of great interest due to the important role of copper-based complexes in …
Page 1 of 3