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Polímeros bidimensionales independientes, mono-monómero de espesor único a través del autoensamblaje covalente en
Kangkyun Baek1, Gyeongwon Yun, Youngkook Kim
1Center for Self-assembly and Complexity, Institute for Basic Science, Pohang, 790-784, Republic of Korea.
Journal of the American Chemical Society
|April 12, 2013
Resumen
Los investigadores desarrollaron un nuevo método para crear polímeros bidimensionales (2D) monoméricos de un solo monómero de espesor en solución. Este avance evita las plantillas y la preorganización, lo que permite nuevas aplicaciones para materiales poliméricos 2D.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- La síntesis de polímeros bidimensionales (2D) en solución es un desafío, por lo general requiere superficies sólidas o preorganización.
- Los métodos existentes limitan la formación de polímeros 2D independientes de un solo monómero de espesor.
Objetivo del estudio:
- Desarrollar un nuevo método basado en soluciones para la síntesis de polímeros 2D independientes de un solo monómero de espesor.
- Para demostrar un enfoque de autoensamblaje covalente dirigido por la forma utilizando bloques de construcción rígidos en forma de disco.
Principales métodos:
- Empleado autoensamblaje covalente de forma dirigida de bloques de construcción rígidos en forma de disco con grupos reactivos periféricos.
- Se utilizó una reacción de clic de tiol-ene entre un derivado de cucurbit[6]uril ((allyloxy) 12CB[6]) y 1,2-ethanedithiol.
- Aprovechó la repulsión electrostática a través de la espermina para mantener la separación de las láminas de polímero durante la síntesis.
Principales resultados:
- Se han sintetizado con éxito polímeros 2D robustos, independientes y de un solo monómero de espesor en solución.
- Caracterizó la estructura de polímero 2D utilizando el etiquetado de nanopartículas de oro y la microscopía electrónica de transmisión por escaneo.
- Demostró la generalidad del enfoque con diferentes monómeros.
Conclusiones:
- El nuevo método permite la síntesis sin plantilla de polímeros 2D de un solo monómero de espesor en solución.
- Estos polímeros 2D muestran potencial para aplicaciones en transporte selectivo, administración de fármacos y detección química.
- El enfoque proporciona una plataforma para la funcionalización ordenada y la construcción 3D de abajo hacia arriba.
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