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Redes 2D de deshidrobenzo fundido de forma rómbica[12]annulenes: variaciones estructurales bajo control de

Kazukuni Tahara¹, Satoshi Okuhata, Jinne Adisoejoso

¹Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531 Japan.

Journal of the American Chemical Society

|November 14, 2009

Resumen

Los investigadores sintetizaron derivados de bisDBA para crear redes porosas en las superficies de grafito. La longitud de la cadena de alquilo y la estructura de la red de control de concentración, con una dilución que favorece las formaciones porosas y permite tamaños de poro ajustables.

Área de la Ciencia:

Se trata de una química supramolecular.
Ciencias de la superficie Ciencias de la superficie.
Ciencia de los materiales ciencia de los materiales.

Sus antecedentes:

Los derivados de BisDBA se sintetizan para la formación de redes.
La interfaz líquido-sólido es un área clave para el diseño de materiales.

Objetivo del estudio:

Para sintetizar derivados de bisDBA sustituidos por alquilo y alkoxi.
Para investigar la formación de redes porosas en la interfaz 1,2,4-triclorobenceno (TCB) / grafito.
Comprender la influencia de la estructura molecular y la concentración en la formación de la red.

Principales métodos:

Síntesis de los derivados de bisDBA (1a-d, 2a, 2b).
Investigación de las estructuras de red en la interfaz TCB / grafito utilizando técnicas de ciencias de la superficie.
Análisis de las relaciones estructura-propiedad basadas en la longitud de la cadena de alquilo y la concentración de soluto.

Principales resultados:

Se observaron cinco estructuras de red (tres porosas: A, B, C; dos no porosas: D, E).
Las cadenas de alquilo más cortas favorecían las estructuras porosas, mientras que las cadenas más largas favorecían las estructuras no porosas.
La dilución indujo una transición de estructuras no porosas a estructuras porosas, influenciadas por la cobertura superficial, la densidad molecular y las interacciones intermoleculares.
Las estructuras porosas fueron estabilizadas por coadsorción con disolvente.
Se observó un patrón de Kagome, con tamaños de poro sintonizables basados en la longitud de la cadena de alquilo.

Conclusiones:

El control de concentración es una herramienta poderosa y general para construir redes porosas en la interfaz líquido-sólido.
La forma del núcleo rómbico y las posiciones de los sustituyentes dictan la formación de la red.
La longitud y la concentración de la cadena de alquilo son parámetros críticos para ajustar las arquitecturas de redes porosas.

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