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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
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Anisotropía quiral y morfológica de polímeros supramoleculares formados por una singularidad en la composición del
Triza Pal1, Debangshu Chaudhuri1
1Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India.
Journal of the American Chemical Society
|January 20, 2023
Resumen
Las interacciones solvente-solute, no solo las propiedades físicas del solvente, controlan la formación y la quiralidad de los polímeros supramoleculares. Las mezclas de disolventes de ajuste fino permiten un control preciso del autoensamblaje, lo que lleva a nanoestructuras quirales ajustables.
Área de la Ciencia:
- Química supramolecular
- Ciencias de los materiales
- Autoensamblaje químico
Sus antecedentes:
- El papel de los disolventes en dirigir el autoensamblaje molecular en polímeros supramoleculares no se entiende completamente.
- Los efectos del disolvente en las interacciones no covalentes son clave para el crecimiento anisotrópico, pero permanecen oscuros en disolventes mixtos.
Objetivo del estudio:
- Investigar la influencia de las interacciones solvente-solute en la anisotropía supramolecular durante el autoensamblaje.
- Explorar cómo los disolventes mixtos afectan las propiedades quirales y morfológicas de las nanoestructuras autoensambladas.
Principales métodos:
- Autoensamblaje de bisimidas quirales de perileno en mezclas de agua y cosolvente.
- Análisis de la formación de la nanoestructura, la quiralidad y los efectos de la composición del disolvente.
- Elucidación de la modulación del disolvente en las interacciones no covalentes y la cinética/termodinámica del autoensamblaje.
Principales resultados:
- El autoensamblaje inicial es agnóstico del disolvente, formando nanoesferas débilmente quirales.
- Un rango estrecho de composición de disolventes desencadena la transformación en polímeros supramoleculares largos y altamente quirales.
- La quiralidad de las nanoestructuras puede revertirse alterando el cosolvente achiral.
Conclusiones:
- Las interacciones solvente-solute son críticas para el control de la polimerización supramolecular y la anisotropía.
- El enfoque debe pasar de las propiedades del solvente a granel a las interacciones específicas solvente-solute para el diseño de materiales autoensamblados.
- El control preciso de la quiralidad y la morfología supramolecular se puede lograr a través de la ingeniería de mezclas de disolventes.
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