搜索结果: 1-15 共查到“物理化学 Electron transfer”相关记录15条 . 查询时间(0.218 秒)
Temperature Dependence of Electron Transfer to the M-Side Bacteriopheophytin in Rhodobacter capsulatus Reaction Centers
hydrogenation fatty acids stereoselectivity kinetics
2016/5/25
Subpicosecond time-resolved absorption measurements at 77 K on two reaction center (RC) mutants of Rhodobacter capsulatus are reported. In the D(LL) mutant the D helix of the M subunit has been substi...
Probing Excited State Electron Transfer by Resonance Stark Spectroscopy.II.Theory and Application
Excited State Electron Resonance Stark Spectroscopy Theory Application
2016/5/23
A theory of the resonance Stark effect data reported in part 1 (preceding paper in this issue) is developed. The model used involves a weak charge resonance interaction between the excited state of an...
Probing Excited State Electron Transfer by Resonance Stark Spectroscopy.I.Experimental Results for Photosynthetic Reaction Centers
adatoms bismuth photoelectron diffraction silicon
2016/5/23
Higher order Stark spectroscopy has recently been introduced and applied to characterize the electrooptic properties of chromophores in bacterial photosynthetic reaction centers.1 In the course of the...
Temperature Dependence of the Electric Field Modulation of Electron-Transfer Rates:Charge Recombination in Photosynthetic Reaction Centers
solar energy inorganic, organic, physical and analytical chemistry photosynthesis reaction kinetics electric fields electron transfer entropy experimental data free energy mathematical models
2016/5/23
The rates of electron-transfer reactions can be systematically varied by application of external electric fields. The electric field effect on the charge recombination rate constant of the state P[sup...
Distance Dependence of Electron-Transfer Reactions in Organized Systems:The Role of Superexchange and Non-Condon Effects in Photosynthetic Reaction Centers
Distance Dependence Electron-Transfer Reactions Organized Systems Superexchange Non-Condon Photosynthetic Reaction Centers
2016/5/23
Extremely long distance electron transfer is observed in some photosynthetic reaction centers. For several charge recombination reactions, the rate appears to fall off much more slowly with distance t...
Electric Field Effects on Emission Line Shapes when Electron Transfer Competes with Emission:an Example from Photosynthetic Reaction Centers
RHODOBACTER-SPHAEROIDES R-26 PRIMARY CHARGE SEPARATION RHODOPSEUDOMONAS-VIRIDIS BACTERIAL PHOTOSYNTHESIS FEMTOSECOND SPECTROSCOPY PROTEIN SUBUNITS 3A RESOLUTION PRIMARY DONOR SPECTRA
2016/5/23
Electron-transfer reactions are expected to be particularly sensitive to externally applied electric fields because of the presence of charge-separated, dipolar states, and the effects of the field on...
Electric Field Effects on the Initial Electron-Transfer Kinetics in Bacterial Photosynthetic Reaction Centers
solar energy inorganic, organic, physical and analytical chemistry photosynthetic reaction centers electron transfer calculation methods electric fields kinetics low temperature photochemistry chemistry 140500* -- solar energy conversion
2016/5/23
The effect of an applied electric field on the kinetics of the initial picosecond electron-transfer reaction in Rb. sphaeroides reaction centers has been measured in isotropic samples at 77 K. The net...
Electric Field Modulation of Electron Transfer Reaction Rates in Isotropic Systems:Long-Distance Charge Recombination in Photosynthetic Reaction Centers
CORROSION PRODUCT NICKEL FERRITE MAGNETITE PH SOLUBILITY PWR STEAM GENERATORS
2016/5/23
A general method is demonstrated for experimentally obtaining the rate constant of electron transfer as a function of the free energy of the reaction in nonoriented systems. An external electric field...
The Use of Large Magnetic Fields to Probe Photoinduced Electron Transfer Reactions:An Example from Photosynthetic Reaction Centers
Large Magnetic Fields Photoinduced Electron Transfer Reactions Photosynthetic Reaction Centers
2016/5/20
We will outline an experimental approach that uses large magnetic fields and simple optical methods, combined with a method of data analysis, that is ideally suited for studying the mechanism of rapid...
Spectral analysis of electron transfer kinetics. II
Spectral analysis electron transfer kinetics
2014/9/24
Electron transfer processes in Debye solvents are studied using a spectral analysis method recently proposed. Spectral structure of a nonadiabatic two-state diffusion equation is investigated to revea...
Nonadiabatic instanton calculation of multistate electron transfer reaction rate: Interference effects in three and four states systems
Nonadiabatic instanton calculation multi state electron transfer reaction rate three and four states systems
2014/9/24
For multistate electron transfer reactions with quantum reaction coordinates, nonadiabatic instanton theory can provide a powerful and direct means of calculating the reaction rate without any limitat...
Spectral analysis of electron transfer kinetics. I. Symmetric reactions
Spectral analysis electron transfer kinetics Asymmetric reactions
2014/9/24
A spectral analysis method is proposed to characterize multiple time scales in electron transfer processes, including vibrational relaxation, electronic coherence, activated curve crossing, or barrier...
Steepest Descent Path Study of Electron-Transfer Reactions
Steepest Descent Path Electron-Transfer Reactions
2014/9/24
A nonadiabatic steepest descent path method is developed as a qualitative tool to analyze and characterize three different kinetic regimes of electron transfer. In this approach, Miller’s semiclassica...
An adiabatic picture for electron transfer in mixed-valence systems
An adiabatic picture electron transfer mixed-valence systems
2014/9/24
An adiabatic picture is proposed to analyze short-time electronic coherence and dephasing in mixed-valence systems,which cannot be described by the Redfield equation or the golden-rule rate theory. In...
The computation of electron transfer rates: The nonadiabatic instanton solution
electron transfer rates nonadiabatic instanton
2014/9/24
A computational theory for determining electron transfer rate constants is formulated based on an instanton expression for the quantum rate and the self-consistent solution of the imaginary time nonad...