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Desbloqueo mecanoquímico del poliladereno aislante al poliacetileno semiconductor
Zhixing Chen1, Jaron A M Mercer1, Xiaolei Zhu1,2,3
1Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|August 5, 2017
Resumen
Los investigadores desarrollaron un nuevo polímero que se transforma de no conjugado a conjugado cuando se aplica fuerza mecánica. Este material mecanoquímicamente sensible reorganiza su estructura, creando nanocables semiconductores.
Área de la Ciencia:
- Ciencias de los materiales
- Química de los polímeros
- Mecanoquímica
Sus antecedentes:
- Los sistemas biológicos exhiben respuestas complejas a estímulos mecánicos.
- El desarrollo de materiales sintéticos que convierten la fuerza mecánica en cambios de propiedades es un área de investigación activa.
Objetivo del estudio:
- Para crear un polímero sintético que se someta a una reorganización estructural significativa en respuesta a la fuerza mecánica.
- Desarrollar un material capaz de transformar la energía mecánica en propiedades intrínsecas alteradas.
Principales métodos:
- Síntesis de poliladerenos mediante la polimerización por metástasis directa.
- Investigando el desbloqueo mecanoquímico del polímero bajo fuerza.
- Caracterización de los copolímeros de bloque de poliacetileno resultantes.
Principales resultados:
- Un polímero no conjugado se convirtió con éxito en un polímero conjugado a través de la fuerza mecánica.
- El polímero fue sometido a una extensa reorganización macromolecular.
- Los copolímeros de bloque de poliacetileno resultantes formaron nanocables semiconductores autoensamblados con una trans-configuración uniforme y una larga longitud de conjugación.
Conclusiones:
- El sistema de poliladerenos desarrollado demuestra una respuesta mecanoquímica eficaz.
- El mecanismo de desempaquetado fácil permite una conversión controlada a polímeros conjugados.
- Este trabajo abre caminos para diseñar materiales sensibles a la fuerza con propiedades electrónicas sintonizables.
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