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

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

9.9K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
9.9K
Diels–Alder Reaction: Characteristics of Dienes01:29

Diels–Alder Reaction: Characteristics of Dienes

4.0K
The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
4.0K
Diels–Alder Reaction: Characteristics of Dienophiles01:24

Diels–Alder Reaction: Characteristics of Dienophiles

5.9K
In a Diels–Alder reaction, the diene is usually an electron-rich system and acts as a nucleophile, whereas the dienophile is electron-deficient and functions as an electrophile. Much like the diene, the nature of the dienophile significantly impacts the outcome of the reaction. 
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends...
5.9K
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

3.7K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
3.7K
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

4.6K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.6K
Schottky Barrier Diode01:27

Schottky Barrier Diode

284
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
284

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Sequential Plasmid Curing and Genome Editing in <i>Escherichia coli</i> Nissle 1917.

ACS synthetic biology·2026
Same author

Identification of Catalytic Sequence at a Single Active Site on a Single-Cluster Catalyst.

Journal of the American Chemical Society·2026
Same author

Conformational gating of single-molecule conductance in crown ether junctions by Li<sup>+</sup> coordination.

Chemical communications (Cambridge, England)·2026
Same author

Pregnancy and lactation exposure to bisphenol S induces ferroptosis via disrupted hepatic lipid metabolism in offspring mice.

Frontiers in toxicology·2026
Same author

<i>N/Si</i>-Doped Nonbenzenoid Buckybowls with Tunable Configurations and Optoelectronic Properties.

Journal of the American Chemical Society·2026
Same author

Enhancing the Stretchability of Polymer Semiconductors by Incorporating Di-2-thienylsulfide as the p-π Conjugation Unit into the Backbones.

Polymer science & technology (Washington, D.C.)·2026

Video Experimental Relacionado

Updated: May 29, 2025

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
07:44

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

8.8K

Diodos supramoleculares con interacciones entre el donante y el receptor

Wei Xu1, Hua Zhang1,2,3, Yu Zhou1

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering & Institute of Artificial Intelligence & Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, P. R. China.

Journal of the American Chemical Society
|February 7, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un diodo supramolecular utilizando apilamiento π-π para el transporte de carga sintonizable. Este diodo molecular logra una alta relación de rectificación de 16 a través del control mecánico y la interferencia cuántica.

Más Videos Relacionados

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
08:51

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core

Published on: October 24, 2017

9.5K
A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

9.8K

Videos de Experimentos Relacionados

Last Updated: May 29, 2025

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
07:44

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

8.8K
Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
08:51

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core

Published on: October 24, 2017

9.5K
A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

9.8K

Área de la Ciencia:

  • La electrónica molecular
  • Química supramolecular
  • Productos electrónicos orgánicos

Sus antecedentes:

  • Los diodos de una sola molécula son cruciales para la electrónica molecular.
  • Los diseños anteriores (D-π-A) se enfrentaron a limitaciones para lograr altos ratios de rectificación debido a los desafíos en el acoplamiento electrónico asimétrico.
  • En 1974 se propusieron los diodos donante-aceptor (D-σ-A), lo que inspiró nuevas investigaciones.

Objetivo del estudio:

  • Para presentar un nuevo diodo supramolecular con rectificación mejorada.
  • Para demostrar el transporte de carga ajustable mediante control mecánico.
  • Investigar el papel de las interacciones intramoleculares π-π en el rendimiento del diodo.

Principales métodos:

  • Fabricación de un diodo supramolecular utilizando pireno (Py) y naftalenodiimida (NDI) mediante apilamiento π-π.
  • Utilizando el control mecánico sub-angstrom para ajustar la asimetría electrónica.
  • Realización de estudios de transporte de electrones y cálculos teóricos (por ejemplo, análisis de interferencia cuántica).

Principales resultados:

  • Se obtiene una alta tasa de rectificación de hasta 16.
  • Transporte de corriente asimétrico sintonizable demostrado mediante estiramiento mecánico.
  • Identificó el sistema D-π-π-A a través del espacio y la interferencia cuántica destructiva como factores clave para la rectificación.

Conclusiones:

  • El diseño del diodo supramolecular supera las limitaciones de los sistemas tradicionales conjugados con π.
  • El control mecánico de las interacciones no covalentes ofrece una nueva vía para rectificadores moleculares de alto rendimiento.
  • Este enfoque muestra el potencial de los dispositivos electrónicos moleculares avanzados.