Video Experimental Relacionado
Updated: Jul 6, 2026
10:27
Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
Published on: July 14, 2015
Formato de manganeso microporoso: un material poroso orgánico-metálico simple con alta estabilidad de marco y
Danil N Dybtsev1, Hyungphil Chun, Sun Hong Yoon
1National Creative Research Initiative Center for Smart Supramolecules and Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea.
Journal of the American Chemical Society
|January 8, 2004
Resumen
Un nuevo material de marco metálico-orgánico exhibe porosidad permanente y adsorbe selectivamente hidrógeno y dióxido de carbono. Este material estable, parecido a la zeolita, muestra potencial para aplicaciones de separación de gases y sensores.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Química es la química.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Los materiales microporosos son cruciales para el almacenamiento y la separación de gases.
- Las estructuras metal-orgánicas (MOF) ofrecen propiedades sintonizables para estas aplicaciones.
- El desarrollo de MOF con adsorción selectiva de gases es un área de investigación en curso.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo marco metálico-orgánico microporoso (MOF).
- Para investigar el comportamiento de absorción de gas, en particular la selectividad para H2 y CO2.
- Para evaluar la estabilidad del material y las aplicaciones potenciales en la separación de gases y sensores.
Principales métodos:
- Síntesis de un nuevo MOF utilizando Mn (II) y iones formato.
- Caracterización de la estructura del MOF y porosidad permanente.
- Experimentos de sorción de gases para evaluar la adsorción de H2, CO2 y N2.
- Pruebas de estabilidad térmica y análisis de mantenimiento de cristalinidad única.
Principales resultados:
- El MOF sintetizado exhibe porosidad permanente y alta estabilidad térmica.
- El material mantiene la cristalinidad única después de la eliminación del huésped a 150 ° C.
- Se observó una adsorción selectiva de H2 y CO2 sobre N2, atribuida a pequeñas aberturas de canal.
- El MOF demuestra una alta cobertura superficial de H2, que excede a la de las zeolitas.
Conclusiones:
- Se ha desarrollado un MOF novedoso, similar a la zeolita, con capacidades de sorción selectiva de gases.
- La estabilidad del material y la estructura de los poros permiten la adsorción selectiva por tamaño.
- Este MOF es prometedor para aplicaciones en tecnologías de separación de gases y sensores químicos.
Videos de Conceptos Relacionados
02:32Bonding in Metals
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
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...
01:23Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
01:15Potentiometry: Membrane Electrodes
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
00:56Extraction: Advanced Methods
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
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...