scispace - formally typeset
Search or ask a question
Topic

Redox

About: Redox is a research topic. Over the lifetime, 26853 publications have been published within this topic receiving 862368 citations. The topic is also known as: reduction-oxidation & reduction-oxidation reaction.


Papers
More filters
Book ChapterDOI
TL;DR: In this paper, the functional electron transfer center of a redox enzyme can be electrically connected to an external source of current through a path of fast electron-relaying redox couples, achieved through electrostatically or covalently binding to the enzyme-proteins high molecular weight redox polycations having segments anchored to electrodes.
Abstract: In a redox enzyme the functional electron transfer center, normally surrounded by an insulating protein matrix, can be electrically connected to an external source of current through a path of fast electron-relaying redox couples. Such “wiring” is achieved through electrostatically or covalently binding to the enzyme-proteins high molecular weight redox polycations having segments anchored to electrodes. With the wired enzymes subsecond response time amperometric biosensors can be built.

585 citations

Journal ArticleDOI
TL;DR: The various pathways for the oxygenation of ferrous iron and for the dissolution of Fe(III) (hydr) oxides, especially by reducing ligands with oxygen donor atoms in thermal and photochemical processes, are assessed on the basis of laboratory experiments for application to natural systems.

584 citations

Journal ArticleDOI
TL;DR: In this article, the authors exploit the unique properties of single-walled carbon nanotubes (SWNT) to achieve direct electron transfer with the redox active centres of adsorbed oxidoreductase enzymes.
Abstract: In this report, exploitation of the unique properties of single-walled carbon nanotubes (SWNT) leads to the achievement of direct electron transfer with the redox active centres of adsorbed oxidoreductase enzymes. Flavin adenine dinucleotide (FAD), the redox active prosthetic group of flavoenzymes that catalyses important biological redox reactions and the flavoenzyme glucose oxidase (GOx), were both found to spontaneously adsorb onto carbon nanotube bundles. Both FAD and GOx were found to spontaneously adsorb to unannealed carbon nanotubes that were cast onto glassy carbon electrodes and to display quasi-reversible one-electron transfer. Similarly, GOx was found to spontaneously adsorb to annealed, single-walled carbon nanotube paper and to display quasi-reversible one-electron transfer. In particular, GOx immobilized in this way was shown, in the presence of glucose, to maintain its substrate-specific enzyme activity. It is believed that the tubular fibrils become positioned within tunnelling distance of the cofactors with little consequence to denaturation. The combination of SWNT with redox active enzymes would appear to offer an excellent and convenient platform for a fundamental understanding of biological redox reactions as well as the development of reagentless biosensors and nanobiosensors.

584 citations

Book ChapterDOI
TL;DR: In this article, the reduction potentials involving inorganic free radicals in aqueous solution were discussed and a tabulation of ∆ f G ° values for all the radicals was presented.
Abstract: Publisher Summary This chapter discusses the reduction potentials involving inorganic free radicals in aqueous solution. Because free radicals are usually transients, knowing their thermodynamic properties is primarily useful in mechanistic studies. Thus, the useful redox couples associated with a given free radical correspond to plausible elementary steps in reaction mechanisms. All potentials are expressed against the normal hydrogen electrode (NHE). Apart from the NHE, the standard state for all solutes is the unit molar solution at 25 °C. This violates the usual convention for species, such as O 2 that occur as gases, but because the rates of bimolecular reactions in solution are significant, the unit molar standard state is most convenient. The emphasis is on electron transfer reactions in which no bonds are formed or broken, electron transfer reactions in which concerted electron transfer and bond cleavage could occur, and certain atom transfer reactions. The chapter also presents a tabulation of ∆ f G ° values for all the radicals. A common approach in estimating the thermochemistry of aqueous free radicals is to use gas-phase data with approximations of solvation energies.

580 citations


Network Information
Related Topics (5)
Aqueous solution
189.5K papers, 3.4M citations
91% related
Catalysis
400.9K papers, 8.7M citations
88% related
Adsorption
226.4K papers, 5.9M citations
87% related
Nanoparticle
85.9K papers, 2.6M citations
87% related
Oxide
213.4K papers, 3.6M citations
87% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20233,178
20225,931
20211,509
20201,274
20191,219