Replacing the nonyl groups on the solar cell dye Ru(4,4'-carboxylic acid-2,2'-bipyridine)(4,4'-dinonyl-2,2'-bipyridine)(NCS)(2) (Z-907) with amino groups results in a marked decrease in solar cell performance. This is despite the fact that the amino derivative (Z-960) has more favourable light absorption characteristics than Z-907 when used with thick nanocrystalline TiO(2) layers. Electron tra...

Abstrtct Chrge resonance interaction in naphthalene homomd heterodimer cations is studied by photodissociation spc'troscopy ofthe charge resonance and the local excitation transitions. The resonance interaction in naphthalene dimer cation is slightly weaker than that ofa benzene dimer cation because ofpartial overlapping ofthe respective aromatic rings. A local excitationband ofthe benzene cati...

A porous electrode is an essential component in a flow battery, and its structure determines the battery’s performance. The coupling of multi-temporal-spatial-scale processes (e.g., electrochemical reaction, mass transfer, charge transfer) makes recognition each process complicated. Herein, symmetric cell device developed, impedance measurement (two- or three-electrode configuration) realized t...

Cytochrome c oxidase is a membrane-bound enzyme that catalyzes the four-electron reduction of oxygen to water. This highly exergonic reaction drives proton pumping across the membrane. One of the key questions associated with the function of cytochrome c oxidase is how the transfer of electrons and protons is coupled and how proton transfer is controlled by the enzyme. In this study we focus on...

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 rate of formation of HL*is reduced upon application of an electric field of IO6 V/cm, consistent with the previously observed increase in the quantum yield of the competing prompt fluorescence. Th...

A novel implementation of a charge based quantum computer is proposed. There is no charge transfer during calculation, therefore, uncontrollable entan-glement between qubits due to long-range Coulomb forces is suppressed. High-speed computation with 1ps per an operation looks as feasible. Almost all recent experimental realizations of quantum computation accomplished on several qubits and even ...

Energy transfer and the primary charge separation process are studied as a function of excitation wavelength in membrane-bound reaction centers of Rhodobacter sphaeroides in which the excitonically coupled bacteriochlorophyll homodimer is converted to a bacteriochlorophyll-bacteriopheophytin heterodimer, denoted D [Bylina, E. J., and Youvan, D. C. (1988) Proc. Natl. Acad. Sci. U.S. A. 85, 7226]...

Photoinduced electron transfer in biological systems, especially in proteins, is a highly intriguing matter. Its mechanistic details cannot be addressed by structural data obtained by crystallography alone because this provides only static information on a given redox system. In combination with transient spectroscopy and site-directed manipulation of the protein, however, a dynamic molecular p...

A complete experimental description of the vibrational Franck-Condon barrier to the one-electron reduction of 4-cyanoN-methylpyridinium cation (NC-py-CH,+) has been obtained. Because of the chemical irreversibility of the electron transfer, the reaction is not readily amenable to study by conventional structural methods. The approach successfully employed here, however, was a time-dependent ana...

Intercalation-based cathode materials such as LiCoO2 (~140 mAh/g) and LiFePO4 (~160 mAh/g) are predominantly used in lithium-ion batteries because they provide exceptional cycling reversibility [1]. However, these materials have low capacity as they are limited to single electron charge transfer reaction, and thus are unlikely candidates for use in electric vehicles (EVs). Conversion compounds ...