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Diadas y tríadas donante-acceptora basadas en perilendiimida: impacto de la arquitectura molecular en las propiedades
Pierre-Olivier Schwartz1, Laure Biniek, Elena Zaborova
1Institut de Physique et de Chimie des Matériaux de Strasbourg, UMR 7504, CNRS, Université de Strasbourg , 23 rue du Loess, BP 43, 67034 Strasbourg, Cedex 2, France.
Journal of the American Chemical Society
|March 28, 2014
Resumen
Se sintetizaron nuevos cooligómeros de perilenodiimida con propiedades electrónicas sintonizables. El análisis estructural reveló disposiciones moleculares específicas en películas delgadas, guiando el diseño de materiales electrónicos orgánicos avanzados.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Electrónica orgánica y electrónica orgánica.
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
Sus antecedentes:
- Los cooligómeros donante-aceptor basados en perilendiimida (PDI) ofrecen propiedades electroactivas sintonizables cruciales para la electrónica plástica.
- Comprender la relación entre la arquitectura molecular y el comportamiento de autoensamblaje es clave para optimizar el rendimiento del material.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos co-oligómeros donante-aceptante con diferentes arquitecturas moleculares (diadas y tríadas).
- Investigar la correlación entre la estructura del co-oligómero y el autoensamblaje en películas delgadas.
- Establecer principios de diseño para cooligómeros basados en PDI con propiedades de autoensamblaje deseables para la electrónica orgánica.
Principales métodos:
- Síntesis de cooligómeros de diada (AD) y tríada (DAD, ADA) que incorporan bloques de aceptor de perileno tetracarboxilo diimida (PDI) y bloques donantes de tiofeno/fluoreno/benzotiadiazol.
- Caracterización estructural utilizando difracción de rayos X pequeña y amplia (XRD).
- Análisis morfológico mediante microscopía electrónica de transmisión (TEM).
Principales resultados:
- Los cooligómeros AD y ADA se autoensamblan en estructuras lamelares que presentan capas dobles con unidades de PDI apiladas en π que se superponen.
- El embalaje observado se atribuye a la menor área seccional del bloque PDI en comparación con el bloque donante.
- El cooligómero DAD exhibió una falta de organización discernible, lo que sugiere requisitos estructurales específicos para el autoensamblaje.
Conclusiones:
- La arquitectura molecular influye significativamente en el comportamiento de autoensamblaje de los cooligómeros basados en PDI.
- Las estructuras lamelares con un fuerte apilamiento π de PDI son favorecidas en las arquitecturas AD y ADA.
- Estos hallazgos proporcionan una base para el diseño de cooligómeros basados en PDI con autoensamblaje controlado para mejorar el rendimiento en dispositivos electrónicos orgánicos.
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