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Controlar la separación de fases y las propiedades ópticas en polímeros conjugados a través de la copolimerización
Jon Hollinger1, Ashlee A Jahnke, Neil Coombs
1Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6.
Journal of the American Chemical Society
|June 8, 2010
Resumen
Los nuevos copolímeros de bloque selenofeno-tiofeno muestran propiedades distintas de los copolímeros estadísticos. Estos copolímeros de bloque conjugado exhiben separación de fase, allanando el camino para nuevas aplicaciones optoelectrónicas.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Electrónica orgánica y electrónica orgánica.
Sus antecedentes:
- Los copolímeros de bloque conjugado ofrecen propiedades únicas en comparación con los copolímeros estadísticos.
- Comprender el autoensamblaje y la separación de fases es crucial para el diseño de materiales avanzados.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos copolímeros de bloque de selenofeno-tiofeno.
- Para investigar las propiedades de estado sólido y el comportamiento de autoensamblaje de estos copolímeros.
- Explorar sus aplicaciones potenciales en optoelectrónica.
Principales métodos:
- Síntesis de copolímeros de bloque de selenofeno y tiofeno.
- Análisis espectroscópico (absorción UV-Vis).
- Caracterización del estado sólido mediante microscopía electrónica de transmisión de barrido (STEM) y mapeo elemental topográfico.
Principales resultados:
- Los copolímeros de bloque mostraban amplios espectros de absorción con desplazamiento al rojo.
- Se observaron distintos dominios separados por fase ricos en selenofeno o tiofeno.
- Se encontró evidencia de asociación preferencial entre bloques de heterociclos distintos, impulsada por diferencias elementales.
Conclusiones:
- Los copolímeros de bloque selenofeno-tiofeno exhiben estructuras únicas separadas por fases.
- Las diferencias elementales controlan la separación de fases en estos polímeros conjugados.
- Estos nuevos materiales son prometedores para diversas aplicaciones optoelectrónicas.
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