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

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...
Valence Bond Theory02:42

Valence Bond Theory

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...
Colors and Magnetism03:02

Colors and Magnetism

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 eye.
Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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...

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Keratin 1 and keratin 18 as immunohistochemical markers for distinguishing pulmonary metastases of oral squamous cell carcinoma from primary lung squamous cell carcinoma.

Scientific reports·2026
Same author

Elucidating the Transition Kernel and Anharmonic Coupling in the Spin-crossover Process of a [Fe<sup>III</sup>(qsal)<sub>2</sub>] CH<sub>3</sub>OSO<sub>3</sub> Complex.

Angewandte Chemie (International ed. in English)·2026
Same author

Association between Physical Function at Discharge and Fall Frequency One Month after Discharge in Patients with Progressive Supranuclear Palsy.

Physical therapy research·2026
Same author

Terahertz Field Control of Electronic-Ferroelectric Anisotropy at Room Temperature in LuFe_{2}O_{4}.

Physical review letters·2025
Same author

Taste Enhancement in Japanese Black Wagyu Beef Fed With Sake Lees: Insights From Metabolomic and Sensory Evaluations.

Food science & nutrition·2025
Same author

Automated Evaluation Method for Aggregation-Induced Circularly Polarized Luminescence of Platinum(II) Complexes With 1,1'-Bi-2-naphthol Derivatives as Ligands.

Chirality·2025

Video Experimental Relacionado

Updated: Jul 14, 2026

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

Los complejos de doble piso de lantanuro funcionan como imanes a nivel de una sola molécula.

Naoto Ishikawa1, Miki Sugita, Tadahiko Ishikawa

  • 1Department of Chemistry,Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan. ishikawa@chem.titech.ac.jp

Journal of the American Chemical Society
|July 17, 2003
PubMed
Resumen

Los complejos de ftaalocianina de dos pisos con iones lantánidos exhiben una lenta relajación de magnetización a altas temperaturas, superando el rendimiento de los imanes tradicionales de una sola molécula (SMM). Este avance se debe a mecanismos de relajación únicos y efectos de campo de ligandos, allanando el camino para nuevos materiales magnéticos.

Más Videos Relacionados

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Videos de Experimentos Relacionados

Last Updated: Jul 14, 2026

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Área de la Ciencia:

  • Coordinación Química de la Coordinación
  • Ciencia de los materiales Ciencia de los materiales.
  • El magnetismo es el magnetismo.

Sus antecedentes:

  • Los imanes de molécula única (SMM) son cruciales para el desarrollo de almacenamiento de datos de alta densidad y computación cuántica.
  • Los complejos de lantánidos ofrecen potencial para SMM de alto rendimiento debido a sus grandes momentos magnéticos y estructuras electrónicas sintonizables.
  • Comprender los mecanismos de relajación es clave para diseñar SMM eficientes que funcionen a temperaturas más altas.

Objetivo del estudio:

  • Para investigar las propiedades magnéticas de los complejos de ftaalocianina de dos pisos que contienen iones Tb3+ o Dy3+.
  • Para explorar el potencial de estos complejos como imanes de una sola molécula de alta temperatura.
  • Para dilucidar el mecanismo detrás de la relajación de magnetización lenta observada.

Principales métodos:

  • Síntesis de complejos de ftaalocianina de dos pisos que incorporan Tb3+ y Dy3+.
  • Mediciones de susceptibilidad magnética (DC y AC) para sondear el comportamiento magnético.
  • Análisis de la dinámica de relajación de la magnetización y el comportamiento dependiente de la temperatura.

Principales resultados:

  • Los complejos de ftaalocianina de dos pisos Tb3+ y Dy3+ sintetizados exhiben una relajación lenta de magnetización, una característica de las SMM.
  • Esta lenta relajación se produce a temperaturas significativamente más altas en comparación con los SMM convencionales de cluster de metales de transición.
  • El comportamiento de alta temperatura observado se atribuye a un mecanismo de relajación distinto que involucra el campo de ligando alrededor del ion lantánido.

Conclusiones:

  • Los complejos de phthalocyanine de dos pisos con Tb3 + o Dy3 + representan una clase prometedora de imanes de una sola molécula de alta temperatura.
  • El campo de ligandos juega un papel crítico en el establecimiento de una gran barrera de energía para la inversión del momento magnético.
  • Estos hallazgos abren nuevas vías para el diseño de materiales magnéticos moleculares avanzados con aplicaciones potenciales en nanotecnología.