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Cuadros orgánicos covalentes no planos de rombo y kagome de aromáticas distorsionadas para la conducción eléctrica
Guolong Xing1,2, Wenhao Zheng3, Lei Gao4
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
Journal of the American Chemical Society
|February 21, 2022
Resumen
Los investigadores desarrollaron nuevos marcos orgánicos covalentes 2D (COF) con una conductividad eléctrica mejorada. Un material, c-HBC-COF, logró una alta movilidad de portadores de carga, allanando el camino para la electrónica avanzada y la optoelectrónica.
Área de la Ciencia:
- Ciencias de los materiales
- Química
- La física
Sus antecedentes:
- Las estructuras orgánicas covalentes bidimensionales (2D) son materiales avanzados con estructuras sintonizables.
- La baja conductividad eléctrica actualmente limita su uso en electrónica y optoelectrónica.
- Mejorar el apilamiento de π y el dopaje químico puede mejorar la conductividad de COF.
Objetivo del estudio:
- Diseñar y sintetizar nuevos COF 2D con una conductividad eléctrica mejorada.
- Investigar la relación entre la estructura de celosía y las propiedades de transporte de carga.
- Explorar el potencial de estos COF en aplicaciones electrónicas y optoelectrónicas.
Principales métodos:
- Síntesis de dos COF 2D no planas (DHP-COF y c-HBC-COF) mediante el uso de bloques de construcción aromáticos distorsionados.
- Caracterización estructural de los COF sintetizados.
- Espectroscopia de terahercios con resolución de tiempo y frecuencia para medir la movilidad del portador de carga.
Principales resultados:
- DHP-COF exhibió una red distorsionada que dificultaba el apilamiento y el transporte de carga.
- c-HBC-COF mostró una red menos distorsionada, facilitando el apilamiento de π entre capas.
- c-HBC-COF logró una alta movilidad del portador de carga de 44 cm2 V-1 s-1, entre las más altas para los COF 2D.
Conclusiones:
- La estructura de celosía tiene un impacto significativo en las propiedades de transporte de carga de los COF 2D.
- c-HBC-COF demuestra un excelente potencial para aplicaciones electrónicas y optoelectrónicas debido a su alta conductividad.
- Este trabajo proporciona una vía para el diseño de COFs 2D altamente conductores.
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