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

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.0K
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...
24.0K
Lewis Acids and Bases02:33

Lewis Acids and Bases

48.1K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.1K
Lewis Acids and Bases02:16

Lewis Acids and Bases

16.7K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
16.7K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.2K
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...
1.2K
Ions as Acids and Bases02:54

Ions as Acids and Bases

26.2K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.2K
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

3.3K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
3.3K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Efficient isolation and sensitive quantification of extracellular vesicles based on an integrated ExoID-Chip using photonic crystals.

Lab on a chip·2019
Same author

Bio-inspired photonic crystals for naked eye quantification of nucleic acids.

The Analyst·2019
Same author

Water Splitting-Assisted Electrocatalytic Oxidation of Glucose with a Metal-Organic Framework for Wearable Nonenzymatic Perspiration Sensing.

Analytical chemistry·2019
Same author

Molecular Mechanisms of AhpC in Resistance to Oxidative Stress in <i>Burkholderia thailandensis</i>.

Frontiers in microbiology·2019
Same author

Genomic landscape and its correlations with tumor mutational burden, PD-L1 expression, and immune cells infiltration in Chinese lung squamous cell carcinoma.

Journal of hematology & oncology·2019
Same author

Chronic hepatitis B virus infection is associated with a poorer prognosis in diffuse large B-cell lymphoma: a meta-analysis and systemic review.

Journal of Cancer·2019

Video Experimental Relacionado

Updated: Jan 19, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K

Los aniones multivalentes como donantes universales de electrones latentes

Cindy G Tang1, Mazlan Nur Syafiqah2, Qi-Mian Koh2

  • 1Department of Physics, National University of Singapore, Singapore, Singapore.

Nature
|September 27, 2019
PubMed
Resumen

Los investigadores desarrollaron nuevos donantes de electrones utilizando aniones multivalentes en racimos de iones. Estos permiten el procesamiento ambiental para electrodos de baja función de trabajo, lo que permite la electrónica orgánica de alto rendimiento como los LED y las células solares.

Más Videos Relacionados

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
06:56

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

8.2K
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

3.7K

Videos de Experimentos Relacionados

Last Updated: Jan 19, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K
1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
06:56

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

8.2K
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

3.7K

Área de la Ciencia:

  • Ciencias de los materiales
  • Productos electrónicos orgánicos
  • La electroquímica

Sus antecedentes:

  • La inyección eficiente de electrones en dispositivos semiconductores requiere electrodos de baja función de trabajo.
  • Los electrodos con funciones de trabajo por debajo de 4 eV generalmente se oxidan en el aire, lo que dificulta el procesamiento ambiental.

Objetivo del estudio:

  • Desarrollar un método para crear electrodos de baja función de trabajo que puedan procesarse en condiciones ambientales.
  • Demostrar un enfoque general para los contactos de electrones ohmicos diseñados químicamente y procesados en el ambiente.

Principales métodos:

  • Utilizó aniones multivalentes (oxalato, carbonato, sulfito) como donantes de electrones latentes en racimos de iones.
  • Agrupaciones de iones dispersos en una matriz para el procesamiento de soluciones.
  • Investigó el dopaje y los mecanismos fotosensibilizados.
  • Se realizó un análisis teórico de los niveles de donantes aniónicos.

Principales resultados:

  • Logró una función de trabajo efectiva ultrabaja de 2,4 eV con un núcleo de polifluoreno.
  • Se ha demostrado el n-dopaje de los polielectrolitos conjugados π.
  • Realizó diodos orgánicos emisores de luz y células solares de alto rendimiento procesados en solución.

Conclusiones:

  • Los grupos de aniones multivalentes sirven como donantes de electrones latentes efectivos para electrodos de baja función de trabajo procesados en el ambiente.
  • Este enfoque permite la fabricación de dispositivos electrónicos orgánicos de alto rendimiento.