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Imitación de enzimas hemo en estado sólido: materiales orgánicos-metálicos con hemo encapsulado selectivamente
Randy W Larsen1, Lukasz Wojtas, Jason Perman
1Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, USA. rwlarsen@usf.edu
Journal of the American Chemical Society
|June 15, 2011
Resumen
Los investigadores desarrollaron nuevos materiales metal-orgánicos (MOM) que imitan las enzimas hemo. Estas MOMzymes combinan la actividad del catalizador homogéneo con la estabilidad del sistema heterogéneo para la catálisis biomimética.
Área de la Ciencia:
- Química biomimética es la química biomimética.
- Ciencia de los materiales Ciencia de los materiales.
- La catálisis es la catálisis.
Sus antecedentes:
- Las enzimas hemo son cruciales para los procesos vitales, ya que utilizan los sitios activos de la porfirina de hierro para la síntesis y manipulación molecular compleja.
- Los catalizadores biomiméticos existentes a menudo tienen dificultades para combinar una alta actividad con estabilidad y reciclabilidad.
Objetivo del estudio:
- Para crear una nueva clase de materiales metal-orgánicos (MOMs) que imitan efectivamente la estructura y la reactividad de las enzimas hemo.
- Desarrollar un sistema catalítico robusto y reciclable para la catálisis biomimética del hemo.
Principales métodos:
- Encapsulación de metaloporfirinas catalíticamente activas dentro de las jaulas a nanoescala de un material metálico-orgánico prototipo (HKUST-1) utilizando un enfoque de "buque en una botella".
- Caracterización de la clase resultante de enzimas basadas en materiales orgánicos-metálicos (MOMzyme-1).
Principales resultados:
- Síntesis exitosa de la primera clase de materiales metal-orgánicos (MOMzymes) que replican la funcionalidad de la enzima hemo.
- Demostración de la actividad combinada de catalizador homogéneo con estabilidad de sistema heterogéneo y reciclabilidad dentro de un solo material.
- Aprovechando la porosidad permanente y la naturaleza modular de los MOM para diversas aplicaciones catalíticas.
Conclusiones:
- La clase MOMzyme-1 representa un avance significativo en la catálisis biomimética del hemo.
- Esta nueva clase de materiales ofrece un paradigma prometedor para el desarrollo de catalizadores eficientes, estables y reciclables.
- Los materiales metálico-orgánicos proporcionan una plataforma versátil para el diseño de materiales funcionales avanzados con propiedades a medida.
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