Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Radical Reactivity: Overview01:11

Radical Reactivity: Overview

Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired molecule. These three...
Introduction to Electrophilic Addition Reactions of Alkenes02:24

Introduction to Electrophilic Addition Reactions of Alkenes

The double bond in a simple, unconjugated alkene is a region of high electron density that can act as a weak base or a nucleophile. The filled π orbital (HOMO) of the double bond can interact with the empty LUMO of an electrophile. A bonding interaction occurs when the electrophile attacks between the two carbons; the electrophile then accepts a pair of electrons from the π bond and undergoes addition across the double bond, yielding a single product.
Addition and elimination reactions can be...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Radical Formation: Addition00:47

Radical Formation: Addition

Radicals can be formed by adding a radical to a spin-paired molecule. This is typically observed with unsaturated species, where the addition of a radical across the π bond leads to the production of a new radical by dissolving the π bond. For example, the addition of a Br radical to an alkene yields a carbon-centered radical.
Similar to charge conservation in chemical reactions, spin conservation is implicit for radical reactions. Accordingly, the product formed must possess an unpaired...
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals01:17

Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals

Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Abortive reaction leads to selective adsorbate rotation.

Faraday discussions·2024
Same author

Direct observation of knock-on reaction with umbrella inversion arising from zero-impact-parameter collision at a surface.

Communications chemistry·2023
Same author

Reversible 1D chain-reaction gives rise to an atomic-scale Newton's cradle.

Chemical communications (Cambridge, England)·2021
Same author

Long-range migration of H-atoms from electron-induced dissociation of HS on Si(111).

Journal of physics. Condensed matter : an Institute of Physics journal·2021
Same author

Direct Observation of Knock-on in Surface Reactions at Zero Impact Parameter.

Journal of the American Chemical Society·2021
Same author

Contrasting Efficiency of Electron-Induced Reaction at Cu(110) in Aliphatic and Aromatic Bromides.

Journal of the American Chemical Society·2020

Video Experimental Relacionado

Updated: May 12, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

El electrón único induce una reacción doble por deslocalización de carga.

Kai Huang1, Lydie Leung, Tingbin Lim

  • 1Lash Miller Chemical Laboratories, Department of Chemistry and Institute of Optical Sciences, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 Canada.

Journal of the American Chemical Society
|April 16, 2013
PubMed
Resumen

La inyección de electrones en el orto-diodobenzeno en una superficie de cobre desencadena una reacción única de ruptura de dos enlaces. Este proceso eficiente, impulsado por la deslocalización de la carga, difiere de la ruptura de un solo enlace observada en moléculas similares.

Más Videos Relacionados

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

Videos de Experimentos Relacionados

Last Updated: May 12, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

Área de la Ciencia:

  • Ciencias de la superficie Ciencias de la superficie.
  • Química Física es la química física.
  • La mecánica cuántica es la mecánica cuántica.

Sus antecedentes:

  • Las reacciones inducidas por electrones en las superficies son cruciales para comprender las transformaciones químicas a nivel molecular.
  • Estudios previos mostraron la ruptura de un solo enlace en moléculas similares tras la inyección de electrones.

Objetivo del estudio:

  • Para investigar el efecto de la inyección de electrones en las moléculas de orto-diodobenzeno fisisorbidas en una superficie de Cu{110}.
  • Explorar el mecanismo detrás de la disociación de enlaces inducida por electrones en este sistema molecular específico.

Principales métodos:

  • Inyección experimental de electrones utilizando un microscopio de túnel de exploración (STM).
  • Análisis de la dinámica de reacción utilizando un modelo de dos estados electrónicos que involucra superficies de energía potencial (PES) aniónicas y de estado fundamental.

Principales resultados:

  • La inyección de un solo electrón de baja energía indujo preferentemente la ruptura de ambos enlaces carbono-yodo (C-I) en el orto-dioodobenzeno.
  • Esta reacción de dos enlaces se produjo con una orden de magnitud mayor eficiencia en comparación con la ruptura de un solo enlace.
  • La mayor reactividad se atribuyó a la deslocalización de carga entre átomos de yodo adyacentes a través de orbitales de antienlace superpuestos.

Conclusiones:

  • La deslocalización de la carga dentro de una sola molécula puede conducir a la ruptura concertada de múltiples enlaces.
  • Este hallazgo sugiere posibilidades más amplias para la deslocalización de carga intra e intermolecular que impulsa reacciones multisite.
  • En contraste con los para-dihalobenzenos donde sólo se observó una sola escisión de enlace C-X.