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Ensamblaje supramolecular de macromoléculas similares a un peine inducido por reacciones químicas que modulan las
Hongwei Xia, Hailin Fu, Yanfeng Zhang1
1Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Journal of the American Chemical Society
|August 5, 2017
Resumen
Las macromoléculas sintéticas pueden diseñarse para autoensamblarse en estructuras complejas mediante el control de sus interacciones. Este estudio demuestra el ensamblaje inducido por reacción de macromoléculas cargadas, ofreciendo un nuevo método para crear materiales blandos funcionales.
Área de la Ciencia:
- Química supramolecular
- Ciencia de los polímeros
- Ciencias de los materiales
Sus antecedentes:
- El ensamblaje supramolecular de proteínas y macromoléculas a través de la nucleación homogénea a menudo es lento y dependiente de las condiciones.
- Los sistemas naturales regulan el ensamblaje de proteínas utilizando moléculas que modulan las interacciones electrostáticas, acoplando el ensamblaje con las reacciones químicas.
- El diseño racional de sistemas sintéticos que imiten esta regulación natural sigue siendo un desafío importante.
Objetivo del estudio:
- Demostrar cómo la modulación in situ de las interacciones en macromoléculas cargadas afecta a las estructuras supramoleculares utilizando un peine macromolécula sintético polipeptídico.
- Investigar la cinética y la termodinámica del ensamblaje inducido por la reacción en macromoléculas cargadas sintéticas.
- Para explorar un nuevo enfoque para ensamblar materia blanda iónica.
Principales métodos:
- Utilizó una macromolécula sintética polipeptídica injertada como sistema modelo.
- Estudió la cinética de la formación de la estructura supramolecular.
- Se ha realizado un análisis termodinámico básico del proceso de montaje.
- Empleó un modelo generalizado de polimerización nucleada con vías secundarias para describir la cinética.
Principales resultados:
- Demostró que la modulación in situ de las interacciones electrostáticas en macromoléculas cargadas influye en sus estructuras supramoleculares.
- La cinética de la formación estructural fue descrita con éxito por un modelo de polimerización nucleada.
- El análisis termodinámico destacó el papel crítico de las interacciones electrostáticas en el ensamblaje inducido por la reacción.
Conclusiones:
- Desarrolló un enfoque sintético para el ensamblaje supramolecular inducido por reacción en macromoléculas cargadas.
- Demostró la capacidad de controlar el ensamblaje de materia blanda a través de la modulación in situ de las interacciones entre subunidades.
- Este método tiene potencial para ensamblar varios materiales blandos iónicos susceptibles a reacciones químicas in situ.
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