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Revestimiento de marco orgánico covalente en catalizadores biomiméticos basados en péptidos anfifílicos
Ashok Kumar Mahato1,2, Sumit Pal1,2, Kaushik Dey1,2
1Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India.
Journal of the American Chemical Society
|June 2, 2023
Resumen
Este estudio estabiliza los catalizadores peptídicos dentro de los marcos orgánicos covalentes porosos (COF) utilizando una técnica de revestimiento. Esto mejora la estabilidad del catalizador y la reciclabilidad para las reacciones de escisión de enlaces C-C en varios disolventes.
Área de la Ciencia:
- Catálisis
- Ciencias de los materiales
- La bioquímica
Sus antecedentes:
- Los catalizadores biomiméticos basados en péptidos ofrecen una actividad catalítica eficiente, pero presentan una escasa estabilidad operativa, especialmente en medios no acuosos.
- Los catalizadores existentes a menudo carecen de la robustez requerida para aplicaciones prácticas en diversas transformaciones químicas.
Objetivo del estudio:
- Desarrollar una nueva técnica de revestimiento para estabilizar los catalizadores biomiméticos de péptidos dentro de andamios orgánicos covalentes porosos (COF).
- Mejorar la actividad catalítica y la estabilidad operativa de los catalizadores peptídicos para las reacciones de escisión de enlaces C-C.
Principales métodos:
- Síntesis de péptidos anfífilos (C10FFVK y C10FFVR) que forman estructuras nanotubulares.
- Estabilización de los nanotubos peptídicos dentro de las columnas vertebrales de COF (TpAzo y TpDPP) mediante cristalización interfacial (IC).
- Caracterización de los catalizadores nanotubulares de péptidos encerrados en COF resultantes.
Principales resultados:
- Se crearon con éxito catalizadores estables y heterogéneos (TpAzo-C10FFVK y TpDPP-C10FFVK) con nanotubos péptidos distribuidos de manera homogénea.
- El catalizador TpAzo-C10FFVK catalizó eficientemente la escisión del enlace C-C en el tampón y los disolventes orgánicos, demostrando una actividad similar a la de las enzimas.
- El catalizador heterogéneo era fácilmente recuperable y reutilizable para múltiples ciclos, con películas delgadas que permitían la catálisis de flujo.
Conclusiones:
- La técnica de revestimiento de COF mejora efectivamente la estabilidad y la reciclabilidad de los catalizadores biomiméticos de péptidos.
- Los residuos de lisina en la secuencia peptídica son cruciales para la actividad catalítica observada en la escisión del enlace C-C.
- Este enfoque ofrece una estrategia prometedora para el desarrollo de catalizadores robustos y versátiles para la síntesis química.
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