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Related Concept Videos

Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox Reactions01:27

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Redox Equilibria: Overview01:23

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
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Oxidation–Reduction Reactions
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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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Updated: Apr 4, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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Rerouting electron transfer in molecular assemblies by redox-pair matching.

Renata Balgley1, Sreejith Shankar1, Michal Lahav2

  • 1Department of Organic Chemistry, The Weizmann Institute of Science, 7610001 Rehovot (Israel).

Angewandte Chemie (International Ed. in English)
|September 11, 2015
PubMed
Summary

Researchers developed new organic materials for controlled electron transfer over extended distances. By layering redox-active metal complexes, they achieved programmable, directional electron flow, enabling new electronic functionalities.

Keywords:
electrochemistryelectron transfermetal complexesredox mediatorsthin films

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Electron transfer through organic materials is crucial for electronics.
  • Controlling electron transfer distance and directionality remains a challenge.
  • Existing methods often lack precise control over long-range charge transport.

Purpose of the Study:

  • To demonstrate control over electron transfer distance in organic materials.
  • To enable electrochemical addressing of otherwise inaccessible layers.
  • To develop materials with programmable uni- or bidirectional electron transfer.

Main Methods:

  • Coating conductive surfaces with nanoscale layers of redox-active metal complexes.
  • Utilizing isostructural metal complexes with varying electron affinities.
  • Employing scalable metal-organic spacers for systematic distance variation.
  • Implementing a versatile assembly approach to control layer deposition sequence.

Main Results:

  • Achieved controlled and extended electron transfer distances through organic layers.
  • Demonstrated selective, directional electron transfer (uni- or bidirectional).
  • Showcased the ability to program bulk material properties via assembly design.
  • Successfully electrochemically addressed distant, previously silent layers.

Conclusions:

  • The developed materials offer precise control over electron transfer in organic systems.
  • This approach allows for the engineering of directional charge transport at the nanoscale.
  • The findings pave the way for advanced organic electronic devices with tailored functionalities.