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Diseño De Novo y síntesis fácil de marcos orgánicos covalentes en 2D: una estrategia de dos en uno

Yusen Li¹, Qing Chen², Tiantian Xu¹

¹Department of Chemistry, Institute of Molecular Plus, and Tianjin Key Laboratory of Molecular Optoelectronic Science , Tianjin University , Tianjin 300072 , P. R. China.

Journal of the American Chemical Society

|August 14, 2019

Resumen

Los investigadores desarrollaron un nuevo diseño molecular de dos en uno para sintetizar marcos orgánicos covalentes basados en iminas 2D (COF). Esta estrategia simplifica la creación de COF y permite aplicaciones en células solares de perovskita.

Área de la Ciencia:

Ciencias de los materiales
Química orgánica
Nanotecnología

Sus antecedentes:

Las estructuras orgánicas covalentes (COF) son polímeros porosos cristalinos con diversas aplicaciones.
La síntesis de COF implica a menudo procedimientos complejos en varios pasos y condiciones de reacción específicas.
El desarrollo de estrategias sintéticas fáciles y adaptables para los FOC es crucial para su adopción generalizada.

Objetivo del estudio:

Introducir una estrategia de diseño molecular "dos en uno" simplificada para la síntesis de COF basado en iminas 2D.
Demostrar la versatilidad y la adaptabilidad al disolvente del enfoque sintético desarrollado.
Explorar el potencial de los COF sintetizados en aplicaciones de dispositivos electrónicos, específicamente como capas de transporte de agujeros.

Principales métodos:

Se diseñó y sintetizó una molécula bifuncional basada en pireno, 1,6-bis(4-formilfenilo)-3,8-bis(4-aminofenilo) pireno (BFBAPy).
Se empleó la autocondensación de BFBAPy en varios disolventes orgánicos para formar Py-COFs altamente cristalinos.
La fabricación de películas delgadas Py-COF en diferentes sustratos se logró para las pruebas de dispositivos.

Principales resultados:

La estrategia "dos en uno" produjo con éxito COFs altamente cristalinos y porosos a base de pireno (Py-COFs).
La síntesis demostró una notable adaptabilidad al disolvente, teniendo éxito en diversos disolventes como el diclorometano, el cloroformo y el acetonitrilo.
Se fabricaron con éxito películas delgadas de Py-COF en varios sustratos, mostrando una promesa para las capas de transporte de agujeros en las células solares de perovskita.

Conclusiones:

El diseño molecular "dos en uno" desarrollado simplifica significativamente la síntesis de COF basados en iminas 2D.
La estrategia ofrece una excelente adaptabilidad del disolvente, una característica rara en la síntesis de COF.
Se prevé que este enfoque sea ampliamente aplicable para sintetizar otros COF, reduciendo la complejidad sintética y permitiendo nuevas aplicaciones.

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