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Estrategia sintética de partición del espacio poroso en marcos orgánicos covalentes multivariados vinculados a la
Mengjie Hao1, Yinghui Xie1, Ming Lei1
1College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P. R. China.
Journal of the American Chemical Society
|December 22, 2023
Resumen
Desarrollamos un método simple para dividir los poros en marcos orgánicos covalentes (COF), mejorando su capacidad para capturar contaminantes de yodo. Esta nueva estrategia crea materiales de COF ajustables con un mejor rendimiento de adsorción.
Área de la Ciencia:
- Ciencias de los materiales
- Nanotecnología
- Ingeniería Química
Sus antecedentes:
- La partición de los poros en marcos orgánicos covalentes (COF) es un desafío, pero ofrece una funcionalidad mejorada.
- La microporosidad y los entornos de poros adaptados son cruciales para las aplicaciones de materiales avanzados.
Objetivo del estudio:
- Desarrollar una estrategia sencilla para la partición de microporos y mesoporos en FOC multivariados.
- Investigar la aplicación de COF divididos por poros para la captura de contaminantes de yodo (I2 y CH3I).
Principales métodos:
- COFs multivariados sintetizados mediante condensación de imina con poros funcionalizados con aldehído.
- Se han introducido bloques de construcción simétricos (simetrías C2 o C3) como agentes de partición de poros.
- Aplicación de COF divididos por poros para la adsorción de yodo (I2) y yoduro de metilo (CH3I).
Principales resultados:
- Los poros tetragonales y hexagonales se han dividido con éxito en microporos más pequeños.
- Relaciones establecidas entre la composición de COF, la arquitectura de los poros y la capacidad de adsorción de yodo.
- Se ha demostrado una adsorción dinámica significativamente mejorada de I2 y CH3I por un COF particionado por poros (COF 3-2P) en comparación con el COF de origen (COF 3).
Conclusiones:
- La estrategia desarrollada ofrece un particionamiento eficaz de los poros en los FOC, creando entornos de poros ajustables.
- Los COF porosos se muestran prometedores como adsorbentes de alto rendimiento para la captura de yodo.
- Este trabajo establece un nuevo punto de referencia para los adsorbentes basados en COF y proporciona una estrategia de diseño para los COF funcionales.
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