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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Sorción de CO2 fuerte y dinámica en un marco poroso flexible que posee garras quelantes invitadas
Pei-Qin Liao1, Dong-Dong Zhou, Ai-Xin Zhu
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Journal of the American Chemical Society
|October 9, 2012
Resumen
Desarrollamos un polímero de coordinación poroso flexible utilizando un ligando bis-triazolato y un ion Zn(II) para una alta adsorción de dióxido de carbono (CO2). Este material muestra una excelente selectividad de CO2/N2 debido a sitios de quelación únicos.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Química supramolecular de las moléculas.
Sus antecedentes:
- Los polímeros de coordinación porosos (PCP) se investigan para el almacenamiento y la separación de gases.
- El desarrollo de materiales con alta selectividad para el dióxido de carbono (CO2) sobre el nitrógeno (N2) es crucial para las aplicaciones ambientales.
- La funcionalización de PCP con sitios de unión específicos puede mejorar las propiedades de adsorción de gases.
Objetivo del estudio:
- Para sintetizar un nuevo polímero de coordinación porosa flexible.
- Para investigar las propiedades de adsorción de CO2 y la selectividad del material sintetizado.
- Comprender el comportamiento dinámico de absorción del CO2.
Principales métodos:
- Síntesis de un polímero de coordinación utilizando un ligando de bis-triazolato y un ion tetraédrico Zn (II).
- Caracterización de la estructura y porosidad del material.
- Mediciones de sorción de gas para determinar la entalpía de adsorción de CO2 y la selectividad de CO2/N2.
- Difracción de rayos X monocristalino para monitorear la absorción dinámica de CO2.
Principales resultados:
- Se sintetizó con éxito un polímero de coordinación porosa flexible.
- El material exhibe una entalpía de adsorción de CO2 muy alta.
- Se logró una alta selectividad para el CO2 sobre el N2 debido a sitios no coordinados de N-donantes de triazolato.
- El comportamiento dinámico de sorción de CO2 se monitoreó efectivamente utilizando difracción de rayos X de un solo cristal.
Conclusiones:
- El nuevo polímero de coordinación Zn(II) basado en bis-triazolato demuestra excelentes capacidades de captura de CO2.
- El diseño del material con sitios de quelación específicos conduce a una alta selectividad de CO2/N2.
- La difracción de rayos X de un solo cristal es una herramienta valiosa para estudiar los procesos dinámicos de sorción de gases en materiales porosos.
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