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Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
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Encapsulación de apertura de un catalizador de metal de transición en un marco metálico orgánico para la
Zhehui Li1, Thomas M Rayder1, Lianshun Luo2
1Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02467 , United States.
Journal of the American Chemical Society
|June 19, 2018
Resumen
Los investigadores encapsularon un catalizador de rutenio dentro de un marco metálico-orgánico (MOF) utilizando un nuevo método de apertura de apertura. Este catalizador encapsulado con MOF convierte eficientemente el CO2 en formato y es reciclable, ofreciendo una alternativa estable a los catalizadores homogéneos.
Área de la Ciencia:
- Ciencias de los materiales
- Catálisis
- Química
Sus antecedentes:
- Las estructuras metálicas orgánicas (MOF) ofrecen estructuras porosas ajustables para la química huésped-invitado.
- Los complejos de rutenio son catalizadores activos, pero a menudo sufren de inestabilidad y poca reciclabilidad en la catálisis homogénea.
Objetivo del estudio:
- Desarrollar un nuevo método para encapsular complejos de rutenio dentro de los MOF.
- Evaluar el rendimiento catalítico y la estabilidad del catalizador de rutenio encapsulado con MOF para la hidrogenación de CO2.
Principales métodos:
- Intercambio de enlaces disociativos en MOF UiO-66 basado en circonio para crear aberturas abiertas.
- Encapsulación del complejo de rutenio (2,6-bis(di-ter-butil-fosfino) metil) piridina) Ru(CO) HCl dentro del marco de UiO-66.
- Prueba de la actividad catalítica y reciclabilidad del material [Ru]@UiO-66 para la hidrogenación de CO2 en forma.
Principales resultados:
- El complejo de rutenio encapsulado, [Ru]@UiO-66, demostró una alta actividad para la hidrogenación de CO2.
- El catalizador [Ru]@UiO-66 fue reciclado con éxito cinco veces sin pérdida significativa de actividad.
- El catalizador encapsulado con MOF exhibió una mayor estabilidad, sin evidencia de descomposición bimolecular y una menor susceptibilidad al envenenamiento por catalizador en comparación con su homólogo homogéneo.
Conclusiones:
- El proceso de apertura de aberturas en los MOF proporciona una estrategia efectiva para sintetizar materiales catalíticos robustos de huésped-invitado.
- La encapsulación de MOF mejora significativamente la estabilidad y la reciclabilidad de los catalizadores de rutenio para la conversión de CO2.
- Este trabajo pone de relieve el potencial de los materiales basados en MOF para la catálisis química avanzada.
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