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Un polímero radical conjugado semiconductor: actividad redox ambipolar y efecto Faraday
Pan Wang1,2, Sibo Lin1, Zhou Lin1
1Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.
Journal of the American Chemical Society
|August 22, 2018
Resumen
Los polímeros radicales conjugados basados en 1,3-bisdifenileno-2-fenilallil (BDPA) muestran actividad y conductividad redox ambipolares. Estos nuevos materiales muestran potencial como materiales magnetoópticos (MO), que compiten con sus contrapartes inorgánicas.
Área de la Ciencia:
- Ciencias de los materiales
- Productos electrónicos orgánicos
- El magnetismo
Sus antecedentes:
- Los poliradicales acoplados electrónicamente se exploran para dispositivos fotónicos y magnéticos, que ofrecen propiedades magnéticas sintonizables.
- La integración de especies radicales en columnas vertebrales de polímeros conductores sigue siendo un área de investigación en una etapa temprana.
- Los trabajos anteriores se centraron en polímeros radicales con espina dorsal aislante.
Objetivo del estudio:
- Sintetizar y caracterizar polímeros de radicales conjugados basados en el 1,3-bisdifenileno-2-fenilallil (BDPA).
- Para investigar sus actividades redox, conductividad y propiedades magneto-ópticas (MO).
- Evaluar su potencial como materiales MO avanzados.
Principales métodos:
- Síntesis de polímeros de radicales conjugados basados en BDPA.
- Análisis electroquímico para mediciones de la actividad redox y de la conductividad.
- Caracterización de los efectos magnetoópticos, incluida la rotación de Faraday y las constantes de Verdet.
Principales resultados:
- Los polímeros radicales conjugados sintetizados exhiben actividades redox ambipolares y conductividad eléctrica.
- Estos polímeros demuestran importantes rotaciones de Faraday, con signos modulados por el carácter radical.
- Se obtienen constantes absolutas de Verdet de hasta (2,80 ± 0,84) × 10^4 grados T^-1 m^-1 a 532 nm, comparables con los materiales de MO inorgánicos comerciales.
Conclusiones:
- Los polímeros radicales conjugados multifuncionales se muestran prometedores como materiales magnetoópticos sensibles.
- La integración de las especies radicales en las columnas vertebrales de polímeros conductores abre nuevas vías para el diseño de materiales.
- Los polímeros a base de BDPA ofrecen una alternativa orgánica viable a los materiales magnetoópticos inorgánicos.
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