Progress made during the past ten years or so by the author's associates in studying inner-sphere electron transfer reactions is reviewed, emphasizing organic molecules as bridging groups. Evidence is outlined for reduction by remote attack in the reaction of chromous ion with isonicotinamidepentaamminecobalt(ni) and with the analogous nicotinamide complex. That there be a conjugated bond syste...

Iron-sulfur clusters, functioning primarily as electron transfer agents, have important roles in biology, participating in plant photosynthesis, nitrogen fixation, steroid metabolism, and oxidative phosphorylation. Present in animals, plants, and bacteria, iron-sulfur clusters are found at the active sites of redox and catalytic proteins. Since the 1970s, metal sites in iron-sulfur proteins hav...

Microbial biofilms grown utilizing electrodes as metabolic electron acceptors or donors are a new class of biomaterials with distinct electronic properties. Here we report that electron transport through living electrode-grown Geobacter sulfurreducens biofilms is a thermally activated process with incoherent redox conductivity. The temperature dependency of this process is consistent with elect...

choline oxidase (chox) was chosen as a model enzyme for evaluating the performance of cnts’ functional groups for development of enzyme electrodes. cnts were functionalized with carboxylic acid, amine or amide groups. carboxylic acid, amine and amide functionalized cnts were obtained by acid treatment, ethylenediamine or tetraethylenepentamine chemically modification and ammonia plasma treatmen...

The microscopic theory of chemical reactions is based on transition state theory, where atoms or ions transfer classically over an energy barrier, as electrons maintain their ground state. Electron fundamentally different and occurs by tunneling in response to solvent fluctuations. Here, we develop the coupled ion-electron transfer, which molecules fluctuate cooperatively facilitate non-adiabat...

glassy carbon (gc) is the most commonly used carbon-based electrode in the analytical laboratory. because of the high background current and low electrode response, modification of this electrode can be done by various materials and techniques. an ionic liquid (il), 1-methyl-3-(3-trimethoxysilyl propyl) imidazoliumbis (trifluoromethylsulfonyl) imide, was covalently cross linked onto the gc surf...

stability of the π-π stacking interactions in the ben||substituted-coronene and hfben||substituted-coronene complexes was studied using the computational quantum chemistry methods (where ben and hfben are benzene and hexaflourobenzene, || denotes π-π stacking interaction, substituted-coronene is coronene molecule which substituted with four x groups, and x= nh2, ch3, oh, h, f, cf3, cn and no). ...

The discovery of bacterial conductive structures, termed nanowires, has intrigued scientists for almost a decade. Nanowires enable bacteria to transfer electrons over micrometer distances to extracellular electron acceptors such as insoluble metal oxides or electrodes. Nanowires are pilus based and in Geobacter sulfurreducens are composed of the type IV pilin subunit PilA. Multiheme c-type cyto...