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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

Redox Reactions

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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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Gap Junctions01:37

Gap Junctions

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Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
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Gap Junctions01:27

Gap Junctions

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The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
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Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
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The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

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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: Dec 6, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Functional Redox-Active Molecular Tunnel Junctions.

Yingmei Han1, Christian A Nijhuis1,2

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.

Chemistry, an Asian Journal
|October 5, 2020
PubMed
Summary
This summary is machine-generated.

Redox-active molecular junctions offer unique electronic functions like molecular transistors. Understanding charge transport in these solid-state systems is key for future molecular electronics advancements.

Keywords:
charge transportmolecular electronicsmolecular switchesredox-active moleculestunnelling

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Area of Science:

  • Molecular electronics
  • Nano-scale devices
  • Organic electronics

Background:

  • Redox-active molecules possess accessible energy levels crucial for molecular-scale electronic functions.
  • Solid-state molecular junctions present challenges in understanding redox processes due to the absence of stabilizing counterions and solvent molecules found in electrochemical environments.

Purpose of the Study:

  • To review molecular junctions based on redox-active molecules.
  • To discuss their properties from chemistry and nanoelectronics perspectives.
  • To explore charge transport mechanisms and electronic functions in solid-state redox-junctions.

Main Methods:

  • Literature review of redox-active molecular junctions.
  • Analysis of charge transport mechanisms in solid-state systems.
  • Case studies of redox-molecules enabling new electronic functions.

Main Results:

  • Redox-active molecules enable functionalities such as rectification, conductance switching, and molecular transistors.
  • Charge transport mechanisms in solid-state redox-junctions are complex and require further investigation.
  • Examples demonstrate the potential of redox-molecules for novel electronic applications.

Conclusions:

  • Further research is needed to fully understand charge transport in solid-state redox-junctions.
  • Molecular design and chemical engineering approaches are critical for advancing this field.
  • Future directions include addressing current challenges and exploring new molecular designs for enhanced electronic performance.