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Combinando la transferencia de carga intramolecular e intermolecular con ciclófanos policationicos para diseñar
M Mustafa Cetin, Yassine Beldjoudi, Indranil Roy
1Joint Center of Excellence in Integrated Nanosystems , King Abdulaziz City for Science and Technology , Riyadh 11442 , Kingdom of Saudi Arabia.
Journal of the American Chemical Society
|October 4, 2019
Resumen
Los nuevos cíclopanos donantes-aceptantes exhiben transferencia de carga fotoinducida y se autoensamblan en diversas superestructuras 2D y tubulares. Estos materiales muestran potencial para el transporte de electrones y aplicaciones de respuesta múltiple.
Área de la Ciencia:
- Química supramolecular
- Ciencias de los materiales
- Productos electrónicos orgánicos
Sus antecedentes:
- Los ciclofanos de donante-aceptor (DA) son cruciales para el desarrollo de materiales funcionales avanzados.
- El control de las propiedades de autoensamblaje y transferencia de carga es clave para el diseño de materiales.
- Las unidades de naftalina y viologen ofrecen características electrónicas y estructurales sintonizables.
Objetivo del estudio:
- Sintetizar y caracterizar los nuevos cíclopanos basados en naftaleno D-A.
- Investigar sus propiedades de transferencia de carga fotoinducida (CT) y sus cambios conformacionales.
- Explorar su autoensamblaje en superestructuras 2D y tubulares y sus posibles aplicaciones.
Principales métodos:
- Síntesis y caracterización de varias formas y simetrías de ciclófano D-A.
- Estudios ópticos de la solución para analizar la TC intramolecular fotoinducida y la emisión.
- Co-cristalización con tetratiofulvaleno (TTF) para formar superestructuras complejas.
Principales resultados:
- CT intramolecular fotoinducida observada a 465 nm, lo que lleva a la emisión a 540 nm.
- Los ciclófanos tipo caja y tipo hexágono se ensamblan a sí mismos en patrones de azulejos cuadrados, honeycomb y hexagonales en 2D.
- La cocristalización con TTF produce superestructuras tubulares con comportamiento CT dual intra e intermolecular.
Conclusiones:
- Los ciclofanos D-A ofrecen un control preciso sobre la formación de la superestructura y las propiedades electrónicas.
- Los materiales sintetizados exhiben características paramagnéticas y de respuesta múltiple prometedoras.
- Estos hallazgos allanan el camino para el desarrollo de nuevos materiales para aplicaciones de transporte de electrones.
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