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Autoensamblaje y conversión fototérmica de metalLa muñeca rusa y las cadenas de metal inducidas a través de múltiples
Tian Chen1,2, Ying Zhao1, Li-Long Dang1,3
1College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, P. R. China.
Journal of the American Chemical Society
|July 17, 2023
Resumen
Los investigadores sintetizaron nuevos complejos supramoleculares organometálicos, incluida una muñeca rusa metálica, utilizando unidades de construcción Cp * Rh y ligandos de antracilpiridina. Estas estructuras exhiben conversiones dinámicas y propiedades fototérmicas eficientes.
Área de la Ciencia:
- Química organometálica
- Química supramolecular
- Ciencias de los materiales
Sus antecedentes:
- Las arquitecturas supramoleculares organometálicas son ampliamente estudiadas.
- La síntesis de estructuras de muñecas metálicas rusas presenta un desafío significativo.
Objetivo del estudio:
- Para sintetizar nuevos complejos supramoleculares de coordinación, incluidos un muñeco metalla-ruso, metalla[2]catenanes y metallarectángulos.
- Explorar la influencia de la estructura del ligando y las unidades de construcción en el ensamblaje supramolecular.
- Investigar las conversiones estructurales dinámicas y las propiedades fototérmicas de los complejos sintetizados.
Principales métodos:
- Estrategia de autoensamblaje mediante el uso de unidades de construcción Cp*Rh (Cp* = η5-C5Me5) (E1, E2, E3) y ligandos de antracilpiridina (L1, L2, L3).
- Caracterización de los complejos supramoleculares de coordinación sintetizados.
- Análisis de las conversiones estructurales dinámicas inducidas por los efectos de concentración, disolvente y huésped.
- Evaluación de la eficiencia de la conversión fototérmica.
Principales resultados:
- Síntesis exitosa de una muñeca rusa metálica, cadenas metálicas y rectángulos metálicos.
- La longitud del ligando y las propiedades electrónicas influyeron en la formación de diferentes arquitecturas (rectángulos metálicos frente a [2] catenanas).
- Se logró un inusual ensamblaje de muñecas rusas a través de interacciones de apilamiento sextuples.
- Se observaron conversiones estructurales dinámicas entre [2]catenanas y rectángulos metálicos.
- Los complejos de [2]catenano 4b mostraron una alta eficiencia de conversión fototérmica (20,2%).
Conclusiones:
- Las unidades de construcción Cp*Rh y los ligandos de antracilpiridina ofrecen versatilidad en la construcción de topologías supramoleculares complejas.
- Las interacciones de apilamiento juegan un papel crucial en el ensamblaje y las propiedades fotofísicas.
- Los complejos sintetizados son materiales funcionales prometedores con eficientes capacidades de conversión fototérmica.
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