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Related Concept Videos

Redox Reactions01:24

Redox Reactions

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 Reactions

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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Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Ions, Molecules, and Compounds

Ions - When an atom participates in a chemical reaction that results in the donation or acceptance of one or more electrons, the atom becomes positively or negatively charged. This frequently happens for most atoms to have a full valence shell. This can happen either by gaining electrons to fill a shell that is more than half-full or by giving away electrons to empty a shell that is less than half-full, thereby leaving the next smaller electron shell as the new, full valence shell. An atom with...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

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Updated: Jun 4, 2026

Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Copper dioxygen (bio)inorganic chemistry.

Edward I Solomon1, Jake W Ginsbach, David E Heppner

  • 1Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA 94305, USA. edward.solomon@stanford.edu

Faraday Discussions
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PubMed
Summary

Copper-oxygen intermediates in catalysis show unique spectral features. Their electronic structures overcome oxygen

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Area of Science:

  • Coordination Chemistry
  • Catalysis Science
  • Spectroscopy

Background:

  • Copper-oxygen (Cu/O2) intermediates are crucial in various catalytic processes.
  • Understanding their spectral features is key to elucidating reaction mechanisms.
  • Novel geometric and electronic structures significantly impact catalytic reactivity.

Purpose of the Study:

  • To review the spectral features of Cu/O2 intermediates in biological, homogeneous, and heterogeneous catalysis.
  • To explore how electronic structures of these intermediates influence reactivity.
  • To discuss the role of copper-copper exchange coupling in reactivity.

Main Methods:

  • Review of existing literature on Cu/O2 intermediates.
  • Analysis of spectral data to correlate with geometric and electronic structures.
  • Theoretical considerations of spin-forbidden O2 binding and reaction pathways.

Main Results:

  • Cu/O2 intermediates possess unique spectral signatures linked to their structures.
  • Electronic structures enable overcoming spin-forbidden O2 binding.
  • Activation of O2 for electrophilic aromatic attack and H-atom abstraction is facilitated.

Conclusions:

  • The electronic structures of Cu/O2 intermediates are pivotal for their reactivity.
  • These intermediates catalyze the 4-electron reduction of O2 to H2O.
  • Exchange coupling between copper ions plays a significant role in determining catalytic outcomes.