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

Molecular Shapes01:18

Molecular Shapes

Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.Two regions of electron density in a diatomic...
Molecular Models02:00

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Structure of Amines01:19

Structure of Amines

The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Genome Assembly and Annotation for the Okinawan Green Marine Spoon Worm <i>Bonellia viridis</i> (Polychaeta: Bonelliidae).

International journal of molecular sciences·2026
Same author

Infrared Spectroelectrochemical Insights into Rhenium-Based Supramolecular Assemblies for Electron Storage and Transfer.

Inorganic chemistry·2026
Same author

Tracking Optical Phonon Dynamics in InP Nanocrystals via Transient Absorption and Femtosecond Stimulated Raman Spectroscopy.

ACS nano·2026
Same author

Causal links between multi-domain risk factors and intervertebral disc degeneration: a systematic review and meta-analysis of Mendelian randomization studies.

BMC musculoskeletal disorders·2026
Same author

Phonon modulation of strongly coupled gold tetrahedral plasmonic nanoparticles and a carbocyanine J-aggregate.

Nanoscale·2026
Same author

Synthesis of bacteriochlorophyll <i>a</i>.

Chemical science·2026

Video Experimental Relacionado

Updated: Jun 11, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Caracterización estructural de las arquitecturas supramoleculares modulares en solución.

David M Tiede1, Ruitian Zhang, Lin X Chen

  • 1Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. tiede@anl.gov

Journal of the American Chemical Society
|October 28, 2004
PubMed
Resumen

Este estudio utilizó la dispersión de rayos X para analizar las arquitecturas supramoleculares de la porfirina. Las estructuras flexibles se adaptan a la inclusión de moléculas invitadas, revelando información sobre su función.

Más Videos Relacionados

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Videos de Experimentos Relacionados

Last Updated: Jun 11, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Área de la Ciencia:

  • Química supramolecular de las moléculas.
  • Ciencia de los materiales Ciencia de los materiales.
  • Física Química Física Química es la física de la química.

Sus antecedentes:

  • Las arquitecturas supramoleculares modulares ofrecen propiedades sintonizables.
  • Los macrociclos de porfirina son componentes clave en varios materiales funcionales.
  • Comprender la dinámica de estado de solución es crucial para el diseño molecular.

Objetivo del estudio:

  • Para caracterizar la estructura de la solución de las matrices macrocíclicas de hexameric porfirina.
  • Para investigar los cambios estructurales tras la inclusión de moléculas invitadas.
  • Establecer una base estructural para la función de estos sistemas supramoleculares.

Principales métodos:

  • Diseminación de rayos X de ángulo alto (HAXS) a una resolución de 6 A.
  • Análisis de la función de distancia de pares (PDF) de los datos de dispersión.
  • Comparación con estructuras modelo de energía minimizada.

Principales resultados:

  • Las arquitecturas de porfirina existen como un conjunto conformacional, no como estructuras rígidas.
  • El diámetro medio es 1,5 A más corto que los modelos idealizados, con una libertad posicional y rotacional significativa.
  • La inserción de la molécula huésped expande el diámetro en 0,6 A y reduce la dispersión de configuración dos veces.

Conclusiones:

  • La dispersión de rayos X de la solución proporciona una visión única de la dinámica conformacional.
  • La naturaleza flexible de la matriz de porfirina es crítica para su función.
  • Los datos estructurales apoyan el diseño molecular para aplicaciones fotofísicas y de hospedaje de invitados.