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

11.7K
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...
11.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K
Properties of Transition Metals02:58

Properties of Transition Metals

25.8K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
25.8K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.4K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.4K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

7.9K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
7.9K
Stereoisomerism02:52

Stereoisomerism

11.9K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.9K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Electronic Structure Study of Rhombic Mn<sup>II</sup> Complexes with Hexadentate N<sub>4</sub>O<sub>2</sub> Chelate Ligands.

Inorganic chemistry·2026
Same author

Highly reducible polyoxometalate-Dy(iii) SMM hybrid materials with exceptional charge stability.

Chemical science·2025
Same author

Magnetic Blocking in Fluoflavine Radical-Bridged Dilanthanide Complexes.

Journal of the American Chemical Society·2025
Same author

Simulating decoherence of two coupled spins using the generalized cluster correlation expansion.

The Journal of chemical physics·2025
Same author

A Metal-Organic Polyhedron-to-Coordination Polymer Transition Revealed by 3D Electron Diffraction.

Angewandte Chemie (International ed. in English)·2025
Same author

Leveraging anion selection to modulate crystallographic symmetry in Yb(III) single-molecule magnets.

Dalton transactions (Cambridge, England : 2003)·2025
Same journal

Radical Cascades on Seawater Microdroplets Drive Atmospheric Mercury Oxidation.

Journal of the American Chemical Society·2026
Same journal

Superior Selective and Fast NH<sub>3</sub> Adsorption of Soft Porous MOF/Ionic Liquid Composites with Ordering Phase Transitions.

Journal of the American Chemical Society·2026
Same journal

Systematic Catalyst Variation for Improved Stereoselective Epoxide Polymerization: Subtle Modifications Resulting in Superior Efficiency.

Journal of the American Chemical Society·2026
Same journal

Deciphering the Halide Chemistry of Cl<sup>-</sup> and Br<sup>-</sup> in Enhancing Kinetics of Mg Plating/Stripping.

Journal of the American Chemical Society·2026
Same journal

Electrosynthesis of C<sub>6</sub> Chemicals by Propylene Oxidative Coupling on Au Surface.

Journal of the American Chemical Society·2026
Same journal

Statistical AI Enables Precise Screening of Multielement Catalysts.

Journal of the American Chemical Society·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Jun 28, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.1K

Transiciones de reloj de ingeniería en complejos de lantánidos moleculares

Robert Stewart1,2,3, Angelos B Canaj4, Shuanglong Liu3,5

  • 1National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States.

Journal of the American Chemical Society
|April 15, 2024
PubMed
Resumen
Este resumen es generado por máquina.

Los complejos de lantánidos con estructuras específicas pueden actuar como qubits magnéticos para tecnologías cuánticas. Modificar el entorno de coordinación ajusta la frecuencia de transición del reloj, mejorando la coherencia y reduciendo la sensibilidad al ruido magnético.

Más Videos Relacionados

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

17.1K
Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

15.0K

Videos de Experimentos Relacionados

Last Updated: Jun 28, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.1K
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

17.1K
Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

15.0K

Área de la Ciencia:

  • Tecnologías cuánticas
  • Magnetismo molecular
  • La computación cuántica

Sus antecedentes:

  • Los complejos de lantánidos moleculares (Ln) son clave para las tecnologías cuánticas.
  • Los complejos Ln de alta simetría forman sistemas cuánticos de dos niveles para los qubits magnéticos.
  • La reducción de la simetría en los complejos Ln mejora la coherencia a través de las transiciones de reloj.

Objetivo del estudio:

  • Investigar complejos de holmio (HoIII) de nueve coordenadas para aplicaciones cuánticas.
  • Detalle el impacto del entorno del ligando en las propiedades del campo cristalino.
  • Demostrar la sintonizabilidad de las transiciones de reloj para mejorar el rendimiento del qubit.

Principales métodos:

  • Espectroscopia de resonancia paramagnética de electrones de alta frecuencia (EPR) de un solo cristal.
  • Cálculos químicos cuánticos de alto nivel desde el principio.
  • Síntesis y caracterización de los complejos [HoIII L1 L2] con ligandos L2 variables (F- o MeCN).

Principales resultados:

  • La simetría de pseudo-4 pliegues en [HoIII L1 F] crea una fuerte anisotropía axial y un cuasi-doblete de estado fundamental mJ = ±8.
  • Se observó una transición de reloj gigante de 116,4 ± 1,0 GHz en el complejo de fluoruro.
  • La sustitución de F- por MeCN (en [HoIII L1 MeCN]) aumentó la frecuencia de transición del reloj en un factor de 2,2.

Conclusiones:

  • La ingeniería de campo de cristal ofrece una ruta para ajustar las frecuencias de transición del reloj en los qubits moleculares.
  • El aumento de la frecuencia de transición del reloj mejora la coherencia al reducir la sensibilidad al ruido magnético.
  • Estos hallazgos allanan el camino para el desarrollo de robustos qubits moleculares para tecnologías cuánticas.