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Diseño racional y construcción de superestructuras jerárquicas utilizando jaulas orgánicas de forma persistente:

Younghoon Kim¹, Jaehyoung Koo¹, In-Chul Hwang¹

¹Center for Self-assembly and Complexity , Institute for Basic Science , Pohang 37673 , Republic of Korea.

Journal of the American Chemical Society

|October 2, 2018

Resumen

Los investigadores desarrollaron superestructuras jerárquicas utilizando jaulas orgánicas porosas y química de coordinación. Estas superestructuras muestran una mayor actividad catalítica para la síntesis de oxígeno singlete en comparación con sus bloques de construcción.

Área de la Ciencia:

Ciencias de los materiales
Química supramolecular
Química de coordinación

Sus antecedentes:

Las jaulas orgánicas porosas (POC) son bloques de construcción versátiles para materiales avanzados.
Las estructuras jerárquicas ofrecen propiedades únicas para aplicaciones en catálisis y separación.
El desarrollo de métodos controlados para la construcción de arquitecturas supramoleculares complejas es crucial.

Objetivo del estudio:

Presentar una nueva estrategia para la construcción de superestructuras jerárquicas utilizando jaulas orgánicas porosas de forma persistente.
Investigar el papel de la química de coordinación en el ensamblaje de estas superestructuras.
Explorar las aplicaciones potenciales de estas superestructuras jerárquicas, particularmente en la catálisis.

Principales métodos:

Utilizando una caja de porfirina metalizada con zinc (Zn-PB) como unidad de construcción secundaria.
Utilizando ligandos puente con terminación en dipiridil para conectar las unidades Zn-PB a través de enlaces de coordinación.
Investigación de la influencia de la longitud del enlace en la formación y las propiedades de la superestructura.
Caracterización de los materiales de superestructura porosos resultantes (PSS) y su actividad catalítica.

Principales resultados:

Construcción exitosa de superestructuras jerárquicas basadas en PB a través de la química de coordinación.
Las PSS se estabilizan mediante enlaces de coordinación y interacciones π-π entre las unidades Zn-PB.
Se identificó una longitud de enlace óptima para la formación eficiente de PSS.
Los PSS exhiben mayores volúmenes de vacío y superficies extrínsecas en comparación con los PB de origen.
Los PSS demostraron una mayor eficiencia catalítica en la síntesis de juglona inducida por oxígeno en comparación con el Zn-PB.

Conclusiones:

Se ha establecido un nuevo método para crear superestructuras jerárquicas a partir de jaulas orgánicas porosas.
Los PSS sintetizados poseen propiedades mejoradas adecuadas para la encapsulación y la funcionalidad.
Estas superestructuras jerárquicas se muestran prometedoras como catalizadores superiores, superando a sus unidades constituyentes.

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