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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
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La unión óptima del acetileno a un marco metálico-orgánico decorado con nitrógeno
Thien D Duong1, Sergey A Sapchenko1,2,3, Ivan da Silva4
1School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , United Kingdom.
Journal of the American Chemical Society
|October 5, 2018
Resumen
Los investigadores observaron por primera vez la unión del acetileno a los grupos nitro en un marco metálico-orgánico (MOF). Esta funcionalidad mejora la capacidad de adsorción de acetileno, lo que hace que los MOF sean prometedores para aplicaciones de almacenamiento de gases.
Área de la Ciencia:
- Ciencias de los materiales
- Química
- La cristalografía
Sus antecedentes:
- Las estructuras metálicas orgánicas (MOF) son materiales porosos con propiedades sintonizables.
- La adsorción de acetileno es crucial para el almacenamiento y la separación de gases.
- La funcionalidad de los MOF puede mejorar sus capacidades de adsorción.
Objetivo del estudio:
- Observar cristalográficamente la unión del acetileno a los grupos nitro (-NO2) en un MOF.
- Investigar el efecto de la funcionalización de -NO2 en la adsorción de acetileno en MFM-102.
- Elucidar el mecanismo de unión al acetileno en el MOF funcionalizado.
Principales métodos:
- La cristalografía
- Difracción de neutrones
- Diseminación inelástica de neutrones
- Mediciones de la adsorción de gases (área de superficie BET, absorción de acetileno)
Principales resultados:
- Primera observación cristalográfica de la unión del acetileno a los grupos -NO2 en un MOF.
- MFM-102-NO2 muestra un aumento del 28% en la adsorción de acetileno (192 cm3 g-1 a 298 K, 1 bar) a pesar de una reducción del 15% en la superficie de BET.
- - Los grupos de NO2 y los sitios abiertos de metal cooperan para unirse al acetileno.
Conclusiones:
- -La funcionalización del NO2 es una estrategia eficaz para mejorar la adsorción de acetileno en los MOF.
- La acción combinada de los grupos -NO2 y los sitios metálicos abiertos dicta la unión al acetileno.
- Este estudio proporciona información fundamental sobre las interacciones entre el gas y el marco para el diseño de MOF.
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