Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Newman Projections

Newman Projections

Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...

Radicals: Electronic Structure and Geometry

Radicals: Electronic Structure and Geometry

This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...

Coordination Number and Geometry

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

VSEPR Theory and the Effect of Lone Pairs

VSEPR Theory and the Effect of Lone Pairs

Effect of Lone Pairs of Electrons on Molecule Geometry

Structure of Benzene: Molecular Orbital Model

Structure of Benzene: Molecular Orbital Model

According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).

VSEPR Theory and the Basic Shapes

VSEPR Theory and the Basic Shapes

Overview of VSEPR Theory

También podría leer

Artículos Relacionados

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

Ordenar por

Same author

GhSCAMP13 Negatively Modulates Salt Tolerance Through GhNHX7b-Dependent Na<sup>+</sup> Homeostasis in Cotton.

Plant biotechnology journal·2026

Same author

Sustainable energy harvesting <i>via</i> a scalable Janus photonic metamaterial for thermoelectric generation.

Materials horizons·2026

Same author

Ultralow chromium doping enables all-PbSe thermoelectric cooling.

Science (New York, N.Y.)·2026

Same author

Maternal hypertensive disorders in East Asia, 1990-2023: incidence, deaths, DALYs and maternal mortality in women aged 20-54 years using GBD 2023.

Hypertension in pregnancy·2026

Same author

Phonon-scattering-induced linear magnetoresistance in the quantum limit up to room temperature.

Nature communications·2026

Same author

The relationship between proactive health literacy and lifestyle behaviors among residents in a region of China.

Frontiers in public health·2026

Search research articles

Video Experimental Relacionado

Updated: Jun 16, 2025

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Nanografeno no plano con una gran superficie π conjugada

Zongchi Zhang¹, Han Zhu², Jiajian Gu³

¹School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.

Journal of the American Chemical Society

|August 21, 2024

Resumen

Los investigadores desarrollaron un nanógrafo no plano con una superficie π de 3 nm grande y precisa. Este avance supera los problemas de agregación, lo que permite un estudio detallado de las propiedades electrónicas y ópticas únicas de los materiales avanzados.

Más Videos Relacionados

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

Videos de Experimentos Relacionados

Last Updated: Jun 16, 2025

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

Área de la Ciencia:

Ciencias de los materiales
Química orgánica
Química supramolecular

Sus antecedentes:

Las superficies π conjugadas son esenciales en moléculas y materiales.
Construir superficies π grandes y atómicamente precisas es un desafío debido a la agregación de las interacciones π-π.
La agregación complica la purificación y el análisis espectroscópico.

Objetivo del estudio:

Diseñar y sintetizar un nanografeno no plano con una superficie π grande, precisa y sin apilamiento.
Para superar las limitaciones de las superficies π tradicionales, permitiendo una caracterización completa.
Establecer una relación clara entre la estructura y la propiedad de dichos sistemas.

Principales métodos:

Diseño y síntesis de un nuevo nanografeno no plano (1).
Caracterización completa, incluida la difracción de rayos X de un solo cristal para la confirmación estructural.
Mediciones espectroscópicas y electrónicas para investigar las propiedades.

Principales resultados:

Síntesis exitosa de nanografeno 1 con 85 anillos fundidos y una superficie π de 3 nm.
Confirmación estructural inequívoca a través de la difracción de rayos X.
Demostración de estructuras electrónicas inusuales, registro de absorción en el infrarrojo cercano, blindaje magnético y fuertes complicaciones de van der Waals.

Conclusiones:

El nanógrafo no plano 1 proporciona una superficie π grande, precisa y sin apilamiento, superando los problemas de agregación.
Estableció una clara relación estructura-propiedad, que antes era difícil de alcanzar.
Los resultados tienen amplias implicaciones para la comprensión de los fenómenos relacionados con las superficies π discretas e interactuantes.