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Catálisis supramolecular de alto volumen de negocios por un complejo de rutenio protegido (II) en solución acuosa

Casey J Brown¹, Gregory M Miller, Miles W Johnson

¹Chemical Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.

Journal of the American Chemical Society

|July 9, 2011

Resumen

Un nuevo catalizador supramolecular que utiliza un complejo de rutenio (II) dentro de un ensamblaje soluble en agua permite la isomerización del alcohol de alilo de alto volumen de ventas. Este sistema anfitrión-invitado protege el catalizador mientras mantiene una alta actividad, logrando más de 1000 volúmenes de negocio.

Área de la Ciencia:

Química supramolecular de las moléculas.
La catálisis es la catálisis.
Química organometálica Química orgánica de los metales.

Sus antecedentes:

El diseño de catalizadores estables y altamente activos es crucial para las transformaciones químicas eficientes.
Los ensamblajes supramoleculares ofrecen entornos únicos para controlar el comportamiento del catalizador.
Los complejos de rutenio (II) son conocidos por su potencial catalítico, pero pueden ser propensos a la descomposición.

Objetivo del estudio:

Desarrollar un catalizador supramolecular con mayor estabilidad y alto número de rotación.
Investigar el efecto del confinamiento supramolecular en la actividad y el alcance del catalizador.
Para demostrar un sistema supramolecular soluble en agua para la catálisis.

Principales métodos:

Incorporación de un catalizador de rutenio (II) en un huésped supramolecular soluble en agua.
Catálisis de la isomerización del alcohol aliloico utilizando el complejo supramolecular.
Caracterización de la estabilidad y actividad del catalizador dentro del sistema anfitrión-invitado.

Principales resultados:

El catalizador supramolecular logró altas cifras de rotación (>1000 turnovers) para la isomerización del alcohol aliloico.
El secuestro dentro del huésped protegió al catalizador de rutenio de la descomposición.
Se mantuvo la actividad catalítica, con el alcance influenciado por el confinamiento del huésped.

Conclusiones:

Se diseñó con éxito un catalizador supramolecular soluble en agua basado en un complejo de rutenio (II).
El complejo anfitrión-invitado proporciona una mayor estabilidad del catalizador y una alta eficiencia catalítica.
La encapsulación supramolecular es una estrategia efectiva para desarrollar catalizadores robustos y activos.

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