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Una nueva solución a un viejo problema: síntesis de poli (para-fenileno no sustituido)
Ali Abdulkarim1,2,3, Felix Hinkel2,4, Daniel Jänsch1,2
1InnovationLab , Speyererstr. 4, 69115 Heidelberg, Germany.
Journal of the American Chemical Society
|December 10, 2016
Resumen
Los investigadores han desarrollado un nuevo método para sintetizar polifenileno puro (PPP), un semiconductor orgánico clave. Este avance permite la creación de películas fluorescentes PPP de alta calidad para aplicaciones electrónicas avanzadas.
Área de la Ciencia:
- Química de los polímeros
- Productos electrónicos orgánicos
- Ciencias de los materiales
Sus antecedentes:
- El polifenileno (PPP) es un polímero conjugado crucial para la electrónica orgánica.
- La síntesis de PPP no sustituido de alto peso molecular ha sido un desafío significativo.
- Los métodos existentes no han logrado producir PPP prístino.
Objetivo del estudio:
- Desarrollar una vía sintética fiable para el polifenileno no sustituido y bien definido.
- Permitir el procesamiento de PPB en películas finas de alta calidad.
- Para lograr PPP altamente fluorescente con estructura y longitud controladas.
Principales métodos:
- Una vía de precursor versátil que incluye la polimerización Suzuki de monómeros de 1,4-dimetociclohexadienileno disueltos.
- Procesamiento del polímero precursor soluble en películas de un nanómetro de espesor mediante recubrimiento.
- Tratamiento térmico sin aditivos para inducir la aromatización y formar el PPP final.
Principales resultados:
- Se ha sintetizado con éxito un polímero precursor no aromático bien soluble.
- Se producen exclusivamente películas de PPE paraconectadas y altamente fluorescentes.
- Se obtienen cadenas PPP con una longitud media de aproximadamente 75 unidades de fenileno.
Conclusiones:
- La vía de precursores desarrollada supera las limitaciones sintéticas anteriores para el PPP no sustituido.
- Este método permite la creación de películas PPP procesables y de alta calidad.
- El PPP resultante exhibe una fluorescencia y una definición estructural excelentes, adecuadas para aplicaciones de semiconductores orgánicos.
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