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Polífuros helicoidales fotostables

Anthony J Varni¹, Andria Fortney¹, Matthew A Baker¹

¹Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213-2617 , United States.

Journal of the American Chemical Society

|May 1, 2019

Resumen

Los nuevos polímeros de éster de furano forman nanopartículas únicas. Estas macromoléculas exhiben una fotostabilidad mejorada y pueden autoensamblarse en estructuras helicoidales con diámetros ajustables.

Área de la Ciencia:

Química de los polímeros
Ciencias de los materiales
Nanotecnología

Sus antecedentes:

Los polifuranos son polímeros versátiles con aplicaciones potenciales en varios campos.
El control de la arquitectura y las propiedades del polímero es crucial para el diseño de materiales avanzados.
Los derivados de polifurano existentes a menudo carecen de suficiente fotostabilidad para ciertas aplicaciones.

Objetivo del estudio:

Diseñar y sintetizar nuevos polifuranos con cadenas laterales de éster.
Investigar el comportamiento de autoensamblaje y la formación de nanopartículas de estos polímeros.
Evaluar la fotostabilidad y las características estructurales de los polímeros de éster de furano sintetizados.

Principales métodos:

Policondensación por transferencia de catalizadores para la síntesis controlada de polifuranos.
Caracterización del peso molecular y la distribución del polímero.
Técnicas espectroscópicas y microscópicas para analizar la estructura y las propiedades de las nanopartículas.

Principales resultados:

Se han sintetizado con éxito polifuranos con cadenas laterales de éster mediante polimerización controlada.
Se ha demostrado una fotostabilidad significativamente mejorada en comparación con los polifuranos alquilo.
Se observó un autoensamblaje espontáneo en nanopartículas cilíndricas multicapa con un núcleo conjugado y una cáscara aislante.
Diámetro de nanopartícula ajustable basado en la longitud de la cadena lateral del éster.
Se han notificado transiciones reversibles de plegado/despliegue en los derivados quirales de polifurano.

Conclusiones:

Las cadenas laterales de éster confieren una mayor fotostabilidad y capacidades de autoensamblaje a los polifuranos.
Los polímeros sintetizados forman nanopartículas cilíndricas huecas bien definidas con potencial para aplicaciones a nanoescala.
Las cadenas laterales quirales introducen la capacidad de respuesta a los cambios en el disolvente, lo que permite transiciones estructurales reversibles.

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