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Una estrategia sintética "todo en uno" para metales lineales[4]Catenanos

Ye Lu^1,2, Dong Liu¹, Yue-Jian Lin¹

¹Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2005 Songhu road, Shanghai 200438, P. R. China.

Journal of the American Chemical Society

|August 2, 2021

Resumen

Los investigadores desarrollaron una nueva estrategia "todo en uno" para sintetizar metales lineales (n=2-4). Este método de autoensamblaje impulsado por la coordinación crea eficientemente moléculas complejas mecánicamente entrelazadas para materiales avanzados.

Área de la Ciencia:

Química supramolecular
Ciencias de los materiales
Síntesis orgánica

Sus antecedentes:

Las moléculas mecánicamente entrelazadas (MIM) son estructuras complejas con propiedades únicas.
Las cadenas lineales [4], que se asemejan al logotipo de Audi, presentan un desafío sintético significativo.
El autoensamblaje impulsado por la coordinación ofrece una ruta poderosa para construir MIM.

Objetivo del estudio:

Desarrollar una estrategia sintética versátil "todo en uno" para las cadenas metálicas lineales (n=2-4).
Utilizar donadores de π rectángulos organometálicos basados en Cp*Rh y receptores de π ciclofanos tetracationes.
Explorar el papel del apilamiento π y las interacciones electrostáticas en el autoensamblaje.

Principales métodos:

Autoensamblaje impulsado por la coordinación de los donantes π basados en Cp*Rh y los receptores π ciclofanos tetracationes.
Utilizando los grupos pirenilo como unidades de π-donante.
Utilizando agitación secuencial y autoensamblaje en un solo paso para cadenas metálicas heterogéneas.

Principales resultados:

Las catenanas metálicas homogéneas y las catenanas metálicas cíclicas se forman a través del apilamiento π.
Las catenanas metálicas[2] heterogéneas y las catenanas metálicas[3] lineales obtenidas a través de interacciones electrostáticas.
Se logró la síntesis cuantitativa en un solo paso de las catenanas metálicas lineales.

Conclusiones:

La estrategia "todo en uno" permite una síntesis eficiente de cadenas metálicas lineales (n=2-4).
Control demostrado de la arquitectura MIM a través del apilamiento π y las interacciones electrostáticas.
Sintetizó y caracterizó con éxito metallocatenanos complejos utilizando varias técnicas analíticas.

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