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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

489
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

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...
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Synthesis and Decomposition Reactions02:17

Synthesis and Decomposition Reactions

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Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes. 
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Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

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Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
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Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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Video Experimental Relacionado

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Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
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Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls

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Construcciones totalmente líquidas y reconfigurables que responden a las reacciones redox

Huilou Sun1, Mingwei Li1, Lianshun Li1

  • 1Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Journal of the American Chemical Society
|March 3, 2021
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo surfactante de nanopartículas supramoleculares sensible al redox que se autoensambla para estructurar líquidos. Este material inteligente permite el control de conjuntos de líquidos para aplicaciones en sistemas de entrega y reacción sensibles.

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Área de la Ciencia:

  • Química supramolecular
  • Ciencias de los materiales
  • Nanotecnología

Sus antecedentes:

  • La química huésped-huésped permite la creación de conjuntos moleculares complejos.
  • Los materiales sensibles son cruciales para las aplicaciones avanzadas en la entrega y catálisis.
  • El control de las estructuras líquidas en las interfaces es un desafío clave en la ciencia de los materiales.

Objetivo del estudio:

  • Introducir un nuevo surfactante de nanopartículas supramoleculares (s-NPS) con capacidad de respuesta redox.
  • Para demostrar el control in situ y reversible de la estructuración de líquidos mediante el uso de S-NPS.
  • Explorar el potencial de estos materiales inteligentes en la creación de dispositivos líquidos programables.

Principales métodos:

  • Utilizó la química anfitrión-invitado dentro de un sistema bifásico.
  • Sistemas S-NPS diseñados que muestran ensamblaje y desmontaje reactivos a la oxidación.
  • Investigó el comportamiento interfacial de s-NPS bajo condiciones de redox conmutables.

Principales resultados:

  • Se ha logrado el montaje/interferencia reversible in situ y el desmontaje/desinterferencia de los S-NPS en la interfaz aceite-agua.
  • Se ha demostrado la capacidad de respuesta redox a nanoescala que influye en los ensamblajes a través de todas las escalas de longitud.
  • Construcciones "inteligentes" completamente líquidas preparadas con éxito, incluidas las emulsiones estructuradas y los dispositivos líquidos programables.

Conclusiones:

  • El s-NPS desarrollado ofrece un nuevo enfoque para estructurar líquidos con control redox a nanoescala.
  • Estos hallazgos presentan aplicaciones prometedoras para sistemas de entrega, liberación y reacción receptivos.
  • La capacidad de programar construcciones líquidas abre nuevas vías en el diseño de materiales.