Video Experimental Relacionado
Updated: Jun 8, 2026
07:20
Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
Fácil conducción de protones a través de moléculas de agua ordenadas en un marco fosfonado metal-orgánico
Jared M Taylor1, Roger K Mah, Igor L Moudrakovski
1Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4.
Journal of the American Chemical Society
|September 23, 2010
Resumen
Un nuevo marco fosfonato metalo-orgánico, PCMOF-3, exhibe cadenas de agua ordenadas dentro de su capa interpola. Esta estructura facilita la conducción de protones, mostrando una conductividad de 3.5 × 10−5 S cm−1 con baja energía de activación.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Química es la química.
- La cristalografía es una técnica de cristalografía.
Sus antecedentes:
- Las estructuras metálicas orgánicas (MOF) son materiales cristalinos con diversas aplicaciones.
- Los MOF basados en fosfonatos ofrecen propiedades estructurales y funcionales únicas.
- Comprender los mecanismos de conducción de protones en los MOF es crucial para las aplicaciones energéticas.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo MOF de fosfonato, el PCMOF-3.
- Para investigar las propiedades de conducción de protones de PCMOF-3.
- Para dilucidar el papel de las moléculas de agua entre capas en el transporte de protones.
Principales métodos:
- Cristalografía de rayos X para la determinación estructural.
- Espectroscopia de RMN de deuterio de estado sólido para el estudio de la dinámica molecular.
- Espectroscopia de impedancia AC para medir la conductividad de los protones.
Principales resultados:
- PCMOF-3 fue sintetizado, revelando una estructura en capas con una capa intermedia polar que contiene cadenas de agua ordenadas.
- Se midió una conductividad de protones de 3,5 × 10−5 S cm−1 a 25 °C y una humedad relativa del 98%.
- Se determinó una baja energía de activación (0,17 eV) para la transferencia de protones, respaldada por datos de RMN que muestran un rápido intercambio de deuterio.
Conclusiones:
- PCMOF-3 es un material prometedor para aplicaciones de conducción de protones.
- Las cadenas de agua ordenadas en la capa interpolar polar juegan un papel clave en facilitar el transporte de protones.
- La estructura MOF permite una eficiente transferencia de protones incluso a bajas temperaturas.
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...
01:25Aquaporins
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
01:27ATP Driven Pumps I: An Overview
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and are...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and are...
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
02:28Electrophiles
This lesson explains the definition, classification, and characteristic features of an electrophile that are key features of nucleophilic substitution reactions. An analysis of their charge and orbital picture helps understand their reactivity for seeking electrons. Electrophiles can be classified into positive and neutral species. Other classes include free radicals and polar functional groups.
While a positive electrophile, like a proton, reacts due to its vacant, low-energy 1s orbital, the...
While a positive electrophile, like a proton, reacts due to its vacant, low-energy 1s orbital, the...
01:29Electron Transport Chain Components
The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...