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 131 for “"Hydrogen Atom"”.
-
One-dimensional hydrogen atom
The photoionization spectrum of highly excited hydrogen atoms in the energy range between E = 0 and E = E$\sb{\rm c}$ ionization thresholds is examined in the presence of a strong dc electric field. Atomic hydrogen is excited from the ground state via a three-photon process to high-lying excited …
-
One-dimensional hydrogen atom
The photoionization spectrum of highly excited hydrogen atoms in the energy range between E = 0 and E = Ec ionization thresholds is examined in the presence of a strong de electric field. Atomic hydrogen is excited from the ground state via a three-photon process to high-lying excited states. …
-
Kinetic Studies of Hydroxyl and Hydrogen Atom Reactions
… of the reactions involving hydroxyl radical and hydrogen atom were studied using experimental and ab initio theoretical techniques. The rate constant for the H + H2S reaction has been measured from 298 to 598 K by the laser photolysis/resonance fluorescence (LP-RF) technique. The transition state …
-
Measurement of the rate of hydrogen atom abstraction from methane and ethane by muonium
… 5.5 kcal/mol higher than for the corresponding H atom reactions. The very large increases in E [α subscript] seem to indicate drastic differences between the Mu and H variants of the title reactions, in location of the transition states on the potential energy surfaces. Also, for the Mu variants, …
-
Rydberg Time-Of-Flight And Imaging Probes Of The Velocity-Dependent Hydrogen Atom Spin Polarization
… particular note is the study of spin-polarized hydrogen (SPH) atoms, which result from photodissociation of molecules. Examination of the detailed H-atom spin polarization is achieved by determining the projection of the electron spin onto the probe laser direction. In doing so, its angular …
-
Thermochemistry and kinetics: hydrogen atom addition reactions with alkenes, oxidation of cyclopentadienone, trifluoroethene and transport properties
… vinyl and phenyl radicals. Reaction kinetics of hydrogen atom addition to primary (P), secondary (S), tertiary (T) vinylic (olefin) carbons to form an alkyl radical is investigated using Density Functional Theory (DFT) and ab initio composite level methods. Results from calculations at different …
-
Kinetic and Spectroscopic Investigation of Structural Influences on Hydrogen-atom Transfer Reactivity of N5-Ligated Oxomanganese(IV) Complexes
… manganese-oxo intermediates perform important hydrogenatom transfer (HAT) reactions in both biological and synthetic systems. There has been extensive characterization of HAT reactivity of enzymatic and synthetic oxoiron(IV) species, and these complexes have been shown to cleave a wide range of …
-
Chemical modification of essential amino acid moieties associated with the red beet (Beta vulgaris, L.) plasma membrane hydrogen atom ATPase
Restriction data tranferred 2014-07-01T11:26:40-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
-
Mechanistic Study of Pollutant Degradation
… is produced by catalytic decomposition of hydrogen peroxide with Fe(II). Further research has found that addition of cyclodextrins can enhance degradation efficiency of hydrophobic organic pollutants. To study the mechanism of the enhancement, pollutant-cyclodextrin-Fe(II) aqueous systems …
-
Structure and thermochemistry of disulfide-oxygen species
… and the their radicals corresponding to H atom loss. Structure and thermochemical parameters (S and Cp(T)) are determined using Density Functional B3LYP/6-31G (d, p), B3LYP/6-311++G (3df, 2p) and composite CBS-QB3 ab initio computational chemistry calculations. Enthalpies of formation for …
-
Charge exchange in thin foils
… hound to it. With one electron we have the hydrogen atom and with two, the negative hydrogen ion. Considering the hare proton as a positive hydrogen ion, we talk of the three charge states of hydrogen: positive, negative and neutral.
-
Charge exchange in thin foils
… hound to it. With one electron we have the hydrogen atom and with two, the negative hydrogen ion. Considering the hare proton as a positive hydrogen ion, we talk of the three charge states of hydrogen: positive, negative and neutral.
-
Synthesis and reactivity of early transitional metal complexes supported by sterically demanding amido ligands
… Complexes: Synthesis, Properties, and Nitrogen Atom Transfer Thereto -- Chapter 4: The Molybdenum-Phosphorus Triple Bond: Terminal Phosphido Complexes and Phosphorus Atom Transfer -- Chapter 5: Oxygenation of PMo(N[R]Ar) 3: Synthesis and Reactivity of a Linear Terminal Phosphoryl (PO) Ligand -- …
-
Gas-phase Ion Chemistry of Hydroxy and Amino-substituted Interstellar Polycyclic Aromatic Hydrocarbons and Protonated Polycyclic Aromatic Hydrocarbons
… larger PAHs, on the order of more than 50 carbon atoms, populate the interstellar medium, the goal of this study was to attempt to extrapolate the results from smaller systems to larger ones. The trends found include: hydroxy-substituted PAH radical cations lose carbon monoxide spontaneously and …
-
Permanganate oxidations of aromatic hydrocarbons in aqueous and organic solution
… of the data are consistent with rate limiting hydrogen atom transfer from the substrate to an oxo group of permanganate. The enthalpies of activation for the various substrates are shown to be directly proportional to the $\rm\Delta H\sp\circ$ of the hydrogen atom transfer step, over a range of …
-
Site-selective C-H Bond Diversification of Glycosides
… harness polarity compatibility between the hydrogen atom abstractor and the substrate to afford site-selective functionalization of sugars that have broad potential biomedical value.
-
Investigation of stagnation-flow diamond-forming flames using advanced laser diagnostics
Gas phase temperature and atomic-hydrogen concentration profiles were measured near the deposition substrate in atmospheric-pressure, stagnation-flow diamond-forming flames. In these flames, a rich acetylene/oxygen/hydrogen mixture accelerates through a nozzle and impinges on a water-cooled …
-
Hydrogen Abstraction by the Nighttime Atmospheric Detergent NO3·: Fundamental Principles
… of much work. Despite this, studies on NO3· hydrogen atom transfer reactions have been somewhat neglected in favor of its more reactive oxidative pathways. The first section of the dissertation will highlight the role of substrate structure, solvent effects, and the presence of a polar …
-
Novel Derivations of the Metric from the Newtonian Potential and of the Relativistic Quantum Equation
… for studying the motion of a particle orbiting a hydrogen atom or a black hole.
Page 1 of 7