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

Colors and Magnetism03:02

Colors and Magnetism

13.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.7K
Valence Bond Theory02:42

Valence Bond Theory

10.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.9K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.1K
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...
1.1K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

739
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
739
Formation of Complex Ions03:45

Formation of Complex Ions

25.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.5K
Ladder Diagrams: Complexation Equilibria01:07

Ladder Diagrams: Complexation Equilibria

572
Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
572

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Asymmetric alloying for heterogeneous metal-ion clusters of chiral-at-carbon CAu<sup>I</sup><sub>4</sub>Ag<sup>I</sup><sub>6</sub> polyhedra exhibiting red to near-infrared photoluminescence.

Nature communications·2026
Same author

Data Management and Analysis of Metal-Organic Framework Synthesis Using Data Models.

Journal of chemical information and modeling·2026
Same author

Hypercarbon-Centered Gold(I)-Copper(I) Clusters Exhibiting a Dissolution/Crystallization-Induced Photoluminochromism.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Entropic Control of the Helicity Inversion Rates of Twisted Metallomacrocycles by Reversible and Regioselective Deprotonation.

Journal of the American Chemical Society·2026
Same author

Rational Design Strategies for Stimuli-Responsive DNAzymes Using Modified and Artificial Nucleotides.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Shape sorting of two distinct amino acid residues at the multiple binding sites of a porous metal-macrocycle framework.

Chemical science·2025

Video Experimental Relacionado

Updated: Jan 2, 2026

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

592

Interconversión Multiestimuladora entre complejos autoensamblados de zinc en forma de tazón y cápsula

Kenichi Endo1, Hitoshi Ube1, Mitsuhiko Shionoya1

  • 1Department of Chemistry, Graduate School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan.

Journal of the American Chemical Society
|December 6, 2019
PubMed
Resumen

Los investigadores desarrollaron nuevos marcos metal-orgánicos que pueden transformarse entre formas de tazón y cápsula en respuesta a múltiples estímulos como ligandos, ácidos, bases, disolventes y huéspedes.

Más Videos Relacionados

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

2.7K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.2K

Videos de Experimentos Relacionados

Last Updated: Jan 2, 2026

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

592
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

2.7K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.2K

Área de la Ciencia:

  • Química supramolecular
  • Química de coordinación
  • Ciencias de los materiales

Sus antecedentes:

  • Las arquitecturas metal-orgánicas exhiben plasticidad estructural, lo que permite aplicaciones en sistemas sensibles.
  • Los sistemas existentes que responden a estímulos generalmente reaccionan a un solo disparador.
  • La interconversión sensible a múltiples estímulos en estructuras orgánicas metálicas es muy deseable, pero rara vez se logra.

Objetivo del estudio:

  • Informar sobre la interconversión sensible a múltiples estímulos entre distintos complejos autoensamblados de zinc.
  • Explorar los principios de diseño para materiales funcionales versátiles.

Principales métodos:

  • Síntesis de los iones ligando L y zinc basados en la porfirina.
  • Investigación de la formación de equilibrio entre los complejos Zn4L3X6 (en forma de cuenco) y Zn4L4 (en forma de cápsula).
  • Inducción de la interconversión estructural utilizando ligandos exógenos, ácido/base de Brønsted, disolventes y moléculas invitadas.

Principales resultados:

  • Se ha demostrado la interconversión reversible entre los complejos en forma de cuenco [ZnII4L3X6] y en forma de cápsula [ZnII4L4].
  • Se identificaron cuatro estímulos externos distintos (ligandos, ácido / base, disolventes, huéspedes) que desencadenan la transformación estructural.
  • Conocimientos mecanicistas detallados sobre el proceso de interconversión basado en especies de equilibrio.

Conclusiones:

  • Se ha logrado una interconversión estructural sensible a múltiples estímulos en complejos de zinc autoensamblados.
  • Los hallazgos proporcionan una base para el diseño de sistemas supramoleculares versátiles y multi-responsivos.
  • Este trabajo pone de relieve el potencial de transformaciones moleculares complejas en materiales funcionales.