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Una jaula de coordinación de alta simetría de 38 o 62 componentes de autoensamblaje
Xiao-Ping Zhou1, Jie Liu, Shun-Ze Zhan
1Department of Chemistry, Shantou University, Guangdong 515063, PR China.
Journal of the American Chemical Society
|May 2, 2012
Resumen
Los químicos crearon una jaula de coordinación de alta simetría utilizando el autoensamblaje de numerosos componentes. Esta arquitectura molecular, formada a través de enlaces dinámicos covalentes y de coordinación, puede encapsular moléculas invitadas.
Área de la Ciencia:
- Química supramolecular de las moléculas.
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Construir arquitecturas moleculares artificiales complejas a partir de numerosos subcomponentes a través del autoensamblaje es un desafío significativo en la química.
- Lograr una alta simetría y rendimiento en estos procesos de autoensamblaje requiere un control preciso sobre la formación de enlaces.
Objetivo del estudio:
- Desarrollar un método reproducible para sintetizar una jaula de coordinación de alta simetría utilizando un gran número de subcomponentes.
- Investigar el proceso de autoensamblaje que involucra enlaces dinámicos covalentes y de coordinación.
- Para demostrar la encapsulación de moléculas invitadas dentro de la jaula sintetizada.
Principales métodos:
- Reacción solvotermal de 38 componentes (14 Ni(2+) iones y 24 ligandos N-metil-1-(4-imidazolyl) metanimine).
- Autoensamblaje de 62 subcomponentes disponibles en el mercado (24 metilamina, 24 4-formilimidazol y 14 iones Ni2+) bajo condiciones suaves.
- Utilizando la formación sincronizada de enlaces dinámicos covalentes y de coordinación.
Principales resultados:
- Formación reproducible de una jaula de coordinación de alta simetría con un gran número de subcomponentes (>50).
- El alto rendimiento se logra mediante el autoensamblaje de precursores fácilmente disponibles en condiciones suaves.
- Encapsulación exitosa de varias moléculas invitadas, incluyendo agua, metilamina y metanol, dentro de la estructura de la jaula.
Conclusiones:
- Se ha establecido un método robusto para construir jaulas de coordinación complejas y de alta simetría a través del autoensamblaje.
- La formación sincronizada de enlaces dinámicos covalentes y de coordinación es eficaz para construir arquitecturas moleculares intrincadas.
- La jaula de coordinación resultante demuestra el potencial para aplicaciones de encapsulación molecular.
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