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Polímeros de coordinación 1D redox-activos de grupos de hierro y azufre
Noah E Horwitz1, Jiaze Xie1, Alexander S Filatov1
1Department of Chemistry , University of Chicago , Chicago , Illinois 60637 , United States.
Journal of the American Chemical Society
|February 5, 2019
Resumen
Los investigadores crearon nuevos polímeros de coordinación utilizando grupos de hierro-azufre (Fe4S4) y enlaces orgánicos. Estos materiales muestran una conductividad eléctrica significativamente mayor cuando los grupos se reducen químicamente.
Área de la Ciencia:
- Ciencias de los materiales
- Química inorgánica
- Nanotecnología
Sus antecedentes:
- Los grupos de hierro-azufre (Fe4S4) son bloques de construcción inorgánicos arquetípicos con actividad redox.
- Los polímeros de coordinación ofrecen estructuras y propiedades ajustables para aplicaciones avanzadas.
Objetivo del estudio:
- Sintetizar y caracterizar nuevos polímeros de coordinación que incorporan cadenas infinitas de grupos de Fe4S4.
- Investigar las propiedades electrónicas y conductoras de estos materiales basados en Fe4S4.
Principales métodos:
- Difracción de polvo de rayos X sincrotrón para la determinación de la estructura cristalina.
- Espectroscopia UV visible y Mössbauer para el análisis de propiedades electrónicas.
- Reducción química para introducir portadores de carga y evaluar la conductividad.
Principales resultados:
- Síntesis exitosa de polímeros de coordinación con cadenas de racimos de Fe4S4 infinitas.
- Solubilidad demostrada y integridad estructural en solución.
- Hasta un aumento de cuatro órdenes de magnitud en la conductividad eléctrica con la reducción de grupos de Fe4S4.
Conclusiones:
- Los clústeres de Fe4S4 sirven como versátiles bloques de construcción redox-activos para el diseño de nuevos polímeros de coordinación.
- Estos materiales exhiben propiedades electrónicas ajustables y una conductividad mejorada, lo que sugiere un potencial en aplicaciones electrónicas.
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