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Showing 1 to 20 of 48 for “"Ruthenium complexes"”.
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Photochemical Oxidation Studies of Porphyrin Ruthenium Complexes
… in nature, namely, the cytochrome P450 enzymes. Ruthenium porphyrin complexes have been the center of this research and have successfully been utilized, as catalysts, in major oxidation reactions, such as the hydroxylation of alkanes. The present work focuses on photocatalytic studies of aerobic …
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Photochemistry and Photophysics of Octahedral Ruthenium Complexes
The photo-induced ligand loss of the complexes [Ru(tpy)(AN)<sub>3</sub>]<sup>2+</sup> and cis-[Ru(tpy)(AN)<sub>2</sub>Cl]<sup>+</sup> (tpy = 2,2`:6`2``-terpyridine) and [Ru(tpy)(5CNU)<sub>3</sub>]<sup>2+</sup> was studied in water and in CH<sub>2</sub>Cl<sub>2</sub> in the presence of chloride from …
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Eta5-pentamethylcyclopentadienyl ruthenium complexes containing sulfur ligands
… respectively. The formal oxidation state of ruthenium in all of the products was IV except for 2.13 and 2.14.
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Ruthenium complexes as potential aqueous romp catalysts
… Polymerisation (ROMP) of bicyclic monomers using ruthenium complex catalysts. Two monomers were synthesised for the purpose of these studies, namely exo, exo-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (7-oxanorbornenedicarboxylic acid) and exo, …
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Ruthenium complexes of nitrogen- and sulfur-containing heterocycles
… centers and the subsequent reactivities of these complexes.
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Reversible binding of dihydrogen to dinuclear ruthenium complexes containing chelating diphosphines
The preparation of dinuclear mixed-valence ruthenium complexes of general formula Ru₂Cl₅(P-P)₂, previously reported for a range of chelating ditertiary phosphines including chiral systems, has been extended to include compounds of the diphosphine 1,4-bis(dicyclohexylphosphino)butane (P-P = DCYPB). …
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On The Nature Of Excited States In Ruthenium Complexes: Towards Renewable Energy
… (spectra, quantum yields and lifetimes) of ruthenium-polypyridyl complexes are investigated to better understand the effects of electronic mixing on metal-to-ligand-charge-transfer (3MLCT) excited state properties and how metal-centered (3MC) excited states affect the properties of potential …
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Synthesis And Biological Evaluation Of Nitrile-Based Inhibitors Of Cysteine Proteases Caged With Ruthenium Complexes
… This dissertation focuses on developing ruthenium-based photocages for caging nitrile-based cysteine protease inhibitors. Four research areas pertaining to this dissertation, i) metals in medicine, ii) photocages in biological applications, iii) photodynamic therapy and iv) cysteine …
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Ruthenium K-edge X-ray absorption spectroscopy studies of ruthenium complexes relevant to olefin metathesis
… previous extensive study of the widely-employed ruthenium-catalysed olefin metathesis reaction, the finer mechanistic details have not been elucidated. An area that is noticeably lacking is spectroscopic exploration of the relevant complexes. In this work, organometallic ruthenium complexes of …
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Synthesis, spectroscopic, and electrochemical properties of 3d metal and ruthenium complexes with phenolate and catecholate ligands
<p>The integration of amphiphilic properties into transition metal coordination systems is a pertinent step toward the development of candidate metallosurfactant precursors for the formation of responsive monolayer films. This concept is intended to preserve the solution-observed redox, …
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Synthesis and characterization of ruthenium complexes with (N-N)(P-P) and (N-P)2 donor sets
… centers. In this work, the donor sets of the ruthenium complexes were modified from the most investigated (P-P)(P-P) to (N-N)(P-P) and (N-P)2 and a series of ruthenium complexes were synthesized and characterized. In Chapter 2, the study of the Ru(N-N)(P-P) complexes is detailed. Three …
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Synthesis and characterization of ruthenium complexes with (N-N)(P-P) and (N-P)2 donor sets
… centers. In this work, the donor sets of the ruthenium complexes were modified from the most investigated (P-P)(P-P) to (N-N)(P-P) and (N-P)2 and a series of ruthenium complexes were synthesized and characterized. In Chapter 2, the study of the Ru(N-N)(P-P) complexes is detailed. Three …
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Synthesis and Optical Properties of Four Oligothiophene-Ruthenium Complexes and Synthesis of a Bidentate Ligand for C-F Bond Activation
… optical devices. A series of four oligothiophene-ruthenium complexes has been synthesized. Variation in oligothiophene length and bipyridine substitution allowed comparison of these variables on electronic properties. The longer oligothiophenes display lower energy absorption and emission compared …
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Kinetic studies of the hydrolysis reactions of ruthenium (III) complexes hIm trans-[RuCl₄(im)₂] and hInd trans-[RUCl₄(ind)₂] by uv-visible spectrophotometry
<p>The ruthenium complexes have gained importance in cancer research in recent times, as several cancers have developed resistance towards platinum compounds. Platinum compounds have severe adverse effects that limited their use towards a wide range of tumors.</p> <p>Ruthenium complexes are …
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Development of O,N-bidentate ruthenium catalysts for isomerization and kinetic studies of ruthenium carbenes for C=C coupling reactions
… even natural products. During the last decade, ruthenium catalysts have provided new indispensable synthetic methods that cannot be promoted by other catalysts and applied in wide range of chemical reactions. This work deals with the development of O,N-bidentate ruthenium homogeneous catalysts …
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Ruthenium and osmium complexes as catalyst precursors for Fischer-Tropsch synthesis
Ruthenium complexes of several types have been synthesized, supported on silica and their activity in CO hydrogenation was investigated in order to determine the cluster size of surface Ru atoms required for the formation of hydrocarbons. Previous studies have shown that more than one metallic site …
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Aqueous Organometallic Catalysis: Nitrile Hydration Catalyzed by Ruthenium(II) 1,3,5-triaza-7-phosphaadamantane (PTA) Derived Complexes
… the synthesis and characterization of ruthenium complexes containing water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) and PTA derived ligands for the application of aqueous phase nitrile hydration. A series of PTA and PTA derivatives were characterized via solid-state NMR (SSNMR) …
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Understanding the Speciation of Ruthenium Arene Complexes as Precursors to Unnatural Enzyme Cofactors
Ruthenium arene complexes have been extensively explored as metallo-pharmaceuticals and as small molecule catalysts. Exploring the overlap between these areas, this thesis describes a body of work aimed at quantitatively understanding the biological speciation and catalytic behaviour of ruthenium …
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Electrochemiluminescence of a Ruthenium Polypyridyl Cyanide Complex
… clinical and laboratory diagnostics. Polypyridyl ruthenium complexes containing cyanide have also been shown to have strong visible absorptions and ground and excited state properties that make them potentially useful in practical application. However, their ECL has never been reported. The …
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