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Un complejo de barril de porfirina tetramérica con plantilla C60 a través del autoensamblaje mediado por zinc
Takashi Nakamura1, Hitoshi Ube, Ryosuke Miyake
1Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|December 5, 2013
Resumen
Los investigadores crearon un nuevo barril de porfirina tetramérica utilizando el autoensamblaje impulsado por la coordinación. Este complejo de metal-jaula, modelado por fullereno C60, demuestra un nuevo método para construir arquitecturas moleculares complejas.
Área de la Ciencia:
- Química supramolecular de las moléculas.
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- El autoensamblaje impulsado por la coordinación es una poderosa estrategia para crear complejas estructuras metalo-supramoleculares.
- Los ligandos de tapa labiles juegan un papel crucial en el control del proceso de ensamblaje y la arquitectura final de los contenedores de jaula metálica.
Objetivo del estudio:
- Para informar sobre la síntesis y caracterización de un nuevo complejo de barril de porfirina tetramérico.
- Demostrar la utilidad de los ligandos de encapsulación lábiles en la formación de estructuras metalo-supramoleculares finitas.
- Explorar el uso de una molécula invitada de fullereno C60 como plantilla en el proceso de autoensamblaje.
Principales métodos:
- Tetrácis ((bipiridil) síntesis de ligando de la porfirina.
- Autoensamblaje impulsado por la coordinación utilizando Zn(OTs) 2 y una plantilla de fullereno C60.
- Caracterización del complejo de barril tetramérico resultante utilizando técnicas espectroscópicas y cristalográficas.
Principales resultados:
- Formación exitosa de un complejo de barril de porfirina tetrámerico, denotado como [C60Zn814(H2O) 4 ((OTs) 12) ((OTs)) 4 (2).
- El complejo cuenta con dos centros distintos de bis (bpy) y Zn (II).
- Los aniones tosilato (OT) actúan como ligandos de tapación labiles, estabilizando la estructura finita de la jaula metálica.
Conclusiones:
- El autoensamblaje impulsado por la coordinación con ligandos de tapación labiles es una estrategia efectiva para construir contenedores de jaula metálica.
- El complejo de barril de porfirina tetramérica representa una nueva arquitectura molecular con aplicaciones potenciales en la química huésped-invitado.
- El fullereno C60 sirve como una plantilla efectiva, guiando el autoensamblaje hacia la estructura finita deseada.
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