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Dejar grupos como modificadores topológicos sin rastro para la síntesis de redes de polímeros topológicamente
Yuwei Gu1, Dominik Schauenburg2, Jeffrey W Bode2
1Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States.
Journal of the American Chemical Society
|October 19, 2018
Resumen
Este estudio introduce una modificación topológica sin rastro para controlar con precisión las estructuras de la red de polímeros. Este nuevo método utiliza plantillas de autoensamblaje para crear topologías de redes de polímeros distintas con composiciones químicas idénticas pero propiedades variadas.
Área de la Ciencia:
- Química de los polímeros
- Ciencias de los materiales
- Química supramolecular
Sus antecedentes:
- El control ortogonal sobre la estructura química y topológica de la red de polímeros es un desafío.
- Los métodos existentes para nuevas topologías de red a menudo incorporan componentes químicos no deseados a través de ensamblajes supramoleculares.
Objetivo del estudio:
- Desarrollar un método para controlar la topología de la red de polímeros sin incorporar componentes de plantilla.
- Introducir "modificadores topológicos sin rastro" para el diseño preciso de la red.
Principales métodos:
- Programación de topología en precursores de red mediante la incorporación de motivos de autoensamblaje en grupos de salida.
- Utilizando la ligadura de trifluoroborato de potasio (KAT) para la formación de redes.
- Utilizando polímeros estrellados a base de polietilenglicol (PEG) con una hidrofobia variable en el extremo de la cadena para el autoensamblaje directo.
Principales resultados:
- Control demostrado de la topología de la red de polímeros utilizando estructuras autoensambladas como plantillas no incorporadas.
- Se han producido con éxito geles PEG topológicamente isoméricos con composiciones químicas idénticas pero propiedades físicas distintas.
- Mostró el impacto de la topología en las propiedades de la red de polímeros a través de la modificación topológica sin rastro.
Conclusiones:
- La modificación topológica sin rastro ofrece una nueva estrategia para el diseño de redes de polímeros con topología controlada.
- Este enfoque permite la creación de materiales con propiedades sintonizables mediante la manipulación de la arquitectura de red.
- Destaca la influencia significativa de la estructura topológica en las propiedades macroscópicas de las redes de polímeros.
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