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Autoensamblaje supramolecular ortogonal sensible al redox y al pH: un conjunto que muestra características de
Dong Sub Kim1, Jinho Chang1,2, Soojung Leem1
1Department of Chemistry, The University of Texas at Austin , 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States.
Journal of the American Chemical Society
|November 26, 2015
Resumen
Se ensamblaron conjuntos supramoleculares químicamente sensibles a partir de dos monómeros. Estos materiales pueden formarse utilizando una base orgánica y desagregarse utilizando un ácido orgánico o una electrólisis.
Área de la Ciencia:
- Química supramolecular
- Ciencias de los materiales
- Química orgánica
Sus antecedentes:
- Los monómeros heteroditópicos ofrecen oportunidades únicas para la construcción de materiales sensibles.
- Los derivados de calix[4]pirrol y tetratiofulvaleno son componentes versátiles en la química supramolecular.
- La conmutación molecular es un mecanismo clave para el diseño de sistemas que responden a estímulos.
Objetivo del estudio:
- Para ensamblar un conjunto supramolecular químico y electroquímicamente sensible.
- Para investigar el comportamiento de autoensamblaje del calix[4]pirrol (SPr-TTF-C[4]P) y el ácido butírico fenilo C61 (PCBA) funcionalizado con tetratiofuleno.
- Demostrar la naturaleza sensible a los estímulos (ácido/base y electroquímica) del material ensamblado.
Principales métodos:
- Síntesis de los monómeros SPr-TTF-C[4]P y PCBA.
- Caracterización de los monómeros mediante técnicas espectroscópicas y electroquímicas.
- Investigación del autoensamblaje provocado por la adición de bases orgánicas.
- Demostración de la desagregación utilizando ácido orgánico y electrólisis.
Principales resultados:
- Ensamblaje exitoso de un conjunto supramolecular de SPr-TTF-C[4]P y PCBA.
- El proceso de autoensamblaje se inicia por un evento de conmutación molecular al agregar una base orgánica.
- El material formado exhibe una desagregación reversible en respuesta al ácido orgánico o estímulos electroquímicos.
- El estudio demuestra la creación de un sistema de respuesta química y electroquímica.
Conclusiones:
- Se construyó con éxito un nuevo conjunto supramolecular que responde a estímulos químicos y electroquímicos.
- El trabajo destaca la utilidad de los monómeros heteroditópicos para el diseño de materiales intercambiables.
- Los resultados proporcionan una base para el desarrollo de materiales sensibles avanzados para diversas aplicaciones.
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