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Cubo de rotación molecular con propiedades quirales y fluorescentes emergentes
Hang Qu1, Yu Wang1, Zhihao Li1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Journal of the American Chemical Society
|August 26, 2017
Resumen
Los investigadores crearon jaulas orgánicas quirales utilizando química covalente dinámica y tetrafeniletileno (TPE). Este método produce jaulas estables y fluorescentes con quiralidad emergente, que ofrecen nuevas posibilidades para el diseño de ensamblaje supramolecular.
Área de la Ciencia:
- Química supramolecular
- Química orgánica
- Ciencias de los materiales
Sus antecedentes:
- Los compuestos de jaula quiral generalmente se basan en precursores quirales o ruptura de simetría.
- Los métodos existentes presentan limitaciones en el control de la quiralidad de la jaula.
- El tetrafeniletileno (TPE) es conocido por sus propiedades de emisión inducida por agregación.
Objetivo del estudio:
- Desarrollar una nueva estrategia para la construcción de jaulas orgánicas quirales.
- Para controlar la configuración de rotación P o M de las caras de TPE.
- Investigar el origen de la quiralidad y la fluorescencia emergentes en estas jaulas.
Principales métodos:
- Química covalente dinámica para restringir las configuraciones de rotación del TPE.
- Teoría de gráficos para el diseño racional y la comprensión del montaje de la jaula.
- Caracterizaciones experimentales (por ejemplo, RMN, cristalografía de rayos X) y cálculos teóricos.
- Técnicas espectroscópicas para el estudio de la fluorescencia y la luminiscencia polarizada circularmente.
Principales resultados:
- Construido con éxito jaulas orgánicas quirales mediante el control de las configuraciones de la cara de TPE.
- Se ha demostrado la quiralidad emergente derivada de los complejos arreglos de las caras de TPE.
- Se observa una fuerte fluorescencia y una luminiscencia polarizada circularmente en las jaulas.
- Se confirmó la estabilidad de la quiralidad y la fluorescencia debido al cambio restringido del anillo fenílico.
Conclusiones:
- Se ha establecido un nuevo método para la construcción de jaulas orgánicas quirales utilizando TPE y química covalente dinámica.
- El estudio aclara el origen de la quiralidad y la fluorescencia emergentes en estas estructuras supramoleculares.
- Los resultados proporcionan un enfoque de diseño racional para las jaulas quirales y los materiales relacionados de los bloques de construcción de emisiones inducidas por agregación.
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