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 21 for “"electron transfer rate"”.
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Unusual Electron Transfer Rate Effects due to Pyridyl Ring Substituents and Trace Group VIII b Hexacyano Complexes as Added Salts
<p>The rates of pseudo-self-exchange electron transfer reactions between [(NH<sub>3</sub>)<sub>5</sub>Ru<sup>II</sup>L]<sup>2+</sup> and [(NH<sub>3</sub>)<sub>5</sub>Ru<sup>III</sup>L’]<sup>3+ </sup> at reactant concentrations of 1.0 х 10<sup>-4</sup> M (where L, L’ = substituted pyridines) and the …
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Synthesis of Crown Ether/Ammonium Salt for Electron Transfer Study
… and Onuchic predicts a large attenuation of ET rates through hydrogen bonds; however, the effect of individual hydrogen bond on electron transfer reaction has not been systematically studied. The organic complexes in this study are a series of crown ether/ammonium salt, which incorporate a redox …
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Genetic Variants in the Putidaredoxin-Cytochrome P-450(cam) Electron Transfer Complex: Identification of the Residue Responsible for Redox-State Dependent Complex Stabilization
… P-450$\sb{\rm cam},$ and a two-protein electron transfer chain, putidaredoxin and putidaredoxin reductase (Tyson et al., (1972) J Biol. Chem. 274, 5777-5784). The enzymatic removal of putidaredoxin's C-terminal tryptophan is known to cause a much reduced rate of enzymatic activity in the …
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Glucose Biosensor Using Electrospun Mn2O3-Ag Nanofibers
… biosensor. A notable enhancement of direct electron transfer between GOD and the electrode is observed at the Mn<sub>2</sub>O<sub>3</sub>-Ag-GOD modified electrode with a fast electron transfer rate constant. The biosensor also shows fast response to glucose, high sensitivity (40.60 …
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Chemical vapour deposition and investigation of thin films of oxide materials for electro- and photo- catalytical applications /
… high charge carrier concentration and high electron transfer rate in redox systems were prepared. Deposited layers are promising for electrocatalytical applications. Possibilities to grow films of potential photocatalysts InMO4 (M = V, Ta, Nb) and Ni-doped analogues were investigated for the …
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Kinetic studies of mechanism of ubiquinol:cytochrome c(2) oxidoreductase of Rhodobacter sphaeroides: A steady state approach
… the first efforts to study the mechanism of electron transfer through b/c$\sb1$ complex of R. sphaeroides under the coupled conditions. It aims at (1) establishing a kinetic model for b/c$\sb1$ complex in the presence of a substantial proton gradient and thereby extending kinetic studies of …
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The P Cluster of the Azotobacter vinelandii Nitrogenase Complex: Effects of Substitution at the Cluster-bridging Residue, a-Cys88
… unique FeS clusters of the MoFe protein, in the electron transfer mechanism of nitrogenase. Prior to the solution of the x-ray crystal structure of the Azotobacter vinelandii MoFe protein, it was had been determined which of the highly conserved cysteinyl residues of this protein were likely P …
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Role of fluctuations and defects in select condensed matter problems
… model the effect of proton fluctuations on the rate of electron transfer in the condensed phase through an electron donor-acceptor assembly linked via an H-bonding bridge. The model suggests that it is possible for the electron transfer rate through a deuterated H-bonding assembly to exceed the …
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Supramolecular porphyrin arrays on DNA and SWNT scaffolds
… is observed; the different monomers incorporated into DNA show different effects in the circular dichroism spectra, which may be explained through the increased conformational freedom of the ‘flexible’ linker. The synthesis of a novel anthraquinone modified nucleoside is presented. Modified …
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Theory and Simulations of Charge Transfer in Engineered Chemical Systems
<p>Electron transfer is an essential process for life to exist and is the working principle of electronics. Fundamental knowledge of electron transfer is crucial for understanding biological processes and developing future devices. Here, we present our theoretical and experimental efforts to …
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Environmental effects on the rate of intramolecular electron transfer in trinuclear mixed-valence transition metal carboxylate complexes in the solid state
… a reflection of the fact that the lowest energy electronic states of Fe$\sb3$O complexes are vibronic and as a result these complexes are very sensitive to their environment. It is also found that the CHCl$\sb3$ solvate complex exhibits a very abrupt phase transition at low temperature (95K) and …
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The Effect of The Solid-State Environment on Intramolecular Electron-Transfer Rates in Mixed-Valence Complexes (Ferrocene)
… and interesting picture of what controls the electron transfer between the two iron ions in the mixed-valence 1',6'-disubstituted biferrocene cation is emerging. The x-ray structures of diiodo-, dichloro-, and di-n-butylbiferrocenium triiodide salts have been determined. Two iron ions are on …
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Pioneering investigations into organometallic electrochemistry
… optimised values of formal potentials, E0, and electron transfer rate constants, k0. In chapter 4, the synthesis and electrochemical characterisation of the first known examples of triazole-substituted cymantrene and cyrhetrene complexes are reported. The compounds …
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Removing the Spin-Triplet Loss Pathway in Organic Solar Cells: A Strategy to Enhance Radiative Efficiency and Minimise Energy Loss
… solar cells and through this work, we demonstrate tactics to reduce the non-radiative decay of photo-generated charges and thereby enhance the radiative efficiency of their decay processes. As the ideal solar cell would have only voltage loss resulting from the radiative recombination of …
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Transition metal oxide layered materials as catalyst and precatalyst for green energy applications: Oxygen evolution reaction and Fischer-Tropsch synthesis
… and Fischer-Tropsch synthesis (FTS) to generate synthetic fuels. Birnessite is a 2D layered manganese dioxide material with intercalated Lewis cations and water molecules. Birnessites have been extensively investigated for their catalytic activity towards oxygen evolution reaction. In this …
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Characterization and catalytic application of an engineered cupredoxin possessing a potential in excess of 1 volt
An engineered variant of the electron transfer catalyst Azurin - a cupredoxin cloned from Pseudomonas aeruginosa - has recently been created, in an attempt to demonstrate the power of the secondary coordination sphere constituents in determining the redox potential of a metal center. This new …
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Controlling Electrocatalytic Interfaces using Thin Films and Nanostructures for Energy Applications
… occurs at the cathode of fuel cells and is the rate-limiting reaction. Water can be electrolyzed using electricity from renewable sources to generate H2 in a green manner. The oxygen evolution reaction (OER) is the rate-limiting reaction for water electrolysis. Unfortunately, catalysts based on …
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Metalloprotein engineering with unnatural amino acids: application in functional heme-copper oxidase and azurin
… able to use amber suppression method to incorporate an unnatural amino acid that mimics cross-linked His-Tyr. The new protein, termed imiTyr-CuBMb, is able to perform O2 reduction reaction three times as fast as protein without cross-link and in a much cleaner fashion. Tyrosine is a conserved …
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Localization of metal ions in DNA
… and the ethidium fluorescence assay illustrate that the pH at which M-DNA formation occurs is influenced heavily by the DNA sequence and base composition. For instance, DNA with a sequence consisting of poly[d(TG)•d(CA)] is completely converted to M-DNA at pH 7.9 while DNA consisting …
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Enhancing the Electron Transfer at Electrochemical Interfaces by Spinel Oxide-Nanostructures
L'abstract è presente nell'allegato / the abstract is in the attachment
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