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Related Concept Videos

Redox Reactions01:27

Redox Reactions

1
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 Bonds02:51

Metal-Ligand Bonds

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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.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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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...
532
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

463
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

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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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Updated: Jun 7, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
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Dual-Redox Responsive Interfaces Based on Donor-Acceptor Interactions.

Shuyi Sun1, Kaijuan Li1, Xin Li1

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

ACS Applied Materials & Interfaces
|November 12, 2024
PubMed
Summary
This summary is machine-generated.

This study demonstrates dual-redox responsive nanoparticle surfactants (NPS) using polydopamine nanoparticles and methyl viologen. These smart NPS enable the creation of functional Pickering emulsions for applications like water purification and controlled release.

Keywords:
donor−acceptor interactionsemulsionsinterfacial assemblynanoparticle surfactantsresponsiveness

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Colloid and Interface Science

Background:

  • Nanoparticle surfactants (NPS) are crucial for stabilizing liquid interfaces and creating functional all-liquid devices.
  • Integrating multiple supramolecular interactions into NPS can yield interfaces responsive to various stimuli.
  • Developing stimuli-responsive materials is key for advanced applications.

Purpose of the Study:

  • To demonstrate the formation and assembly of a supramolecular NPS at the water-toluene interface.
  • To achieve dual-redox responsiveness in NPS by combining donor-acceptor interactions.
  • To explore the potential of these responsive NPS in creating functional Pickering emulsions.

Main Methods:

  • Utilized donor-acceptor interactions between polydopamine nanoparticles (PDA NPs) and methyl viologen (MV2+) terminated polystyrene.
  • Investigated the formation, assembly, and jamming of supramolecular NPS at the water-toluene interface.
  • Employed NPS as an emulsifier to create various Pickering emulsion types (O/W, W/O, O/W/O).

Main Results:

  • Successfully formed and assembled a supramolecular NPS at the water-toluene interface.
  • Achieved dual-redox responsiveness by harnessing the redox properties of catechol and MV2+.
  • Produced O/W, W/O, and O/W/O Pickering emulsions in one step, exhibiting smart responsiveness to redox reagents.
  • Demonstrated the purification of dye-polluted water using O/W Pickering emulsions.

Conclusions:

  • The developed dual-redox responsive supramolecular NPS offers a versatile platform for creating reconfigurable structured liquids.
  • These NPS-based emulsions show promise for applications in controlled-release systems and intelligent functional materials.
  • The ability to tune interface properties through dual-redox stimuli opens new avenues in materials design.