Video Experimental Relacionado
Updated: May 9, 2026
04:51
Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
Published on: June 23, 2023
M(12) L(24) esferas con sitios de coordinación endo y exo: andamios para la funcionalización no covalente
Kate Harris1, Qing-Fu Sun, Sota Sato
1Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|August 13, 2013
Resumen
Los investigadores crearon complejos esféricos M12L24 utilizando el autoensamblaje. Estas estructuras incorporan 24 anillos de piridina y pueden coordinar iones metálicos secundarios, como la plata, dentro de su marco.
Área de la Ciencia:
- Se trata de una química supramolecular.
- La química de la coordinación es química de la coordinación.
- Ciencia de los materiales ciencia de los materiales.
Sus antecedentes:
- El autoensamblaje es una estrategia clave para la construcción de arquitecturas moleculares complejas.
- Los marcos metálico-orgánicos ofrecen propiedades sintonizables para diversas aplicaciones.
- Los ligandos basados en piridina son versátiles bloques de construcción en la química de la coordinación.
Objetivo del estudio:
- Para sintetizar nuevos complejos esféricos M12L24.
- Para investigar el proceso de auto-ensamblaje de los ligandos tridentados tris ((pyridine) con iones metálicos.
- Explorar la coordinación de los iones metálicos secundarios dentro del marco esférico sintetizado.
Principales métodos:
- El autoensamblaje de los ligandos de tridentato, tris (pyridine) y palladio (II) con sus iones.
- Caracterización de los complejos esféricos M12L24 resultantes.
- Coordinación de los iones de plata (I) con los anillos de endopiridina dentro del marco.
Principales resultados:
- Síntesis exitosa de complejos esféricos M12L24 con 24 anillos de piridina.
- Demostración del autoensamblaje impulsado por las interacciones ligando-metal.
- Confirmación de la coordinación de iones metálicos secundarios (Ag+) en el interior de las estructuras esféricas.
Conclusiones:
- El estudio presenta un nuevo método para construir complejos esféricos M12L24.
- Los complejos sintetizados exhiben potencial para albergar iones metálicos secundarios.
- Este trabajo contribuye al campo de la química supramolecular y el diseño de la estructura metal-orgánica.
Más Videos Relacionados
Videos de Conceptos Relacionados
02:51Metal-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...
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...
02:42Valence 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...
02:57Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
02:54Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
01:30Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...