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Cuadros orgánicos covalentes microporosos 3D para la separación cromatográfica líquida de isómeros de xileno y
Jinjing Huang1, Xing Han1, Shi Yang1
1School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites , Shanghai Jiao Tong University , Shanghai 200240 , China.
Journal of the American Chemical Society
|May 16, 2019
Resumen
Desarrollamos marcos orgánicos covalentes microporosos (COF) utilizando una estrategia de interpenetración de marco para la separación eficiente de isómeros alquilo-aromáticos C8. Salen-COF demostró un alto rendimiento en la separación de isómeros de xileno y etilbenceno mediante cromatografía líquida.
Área de la Ciencia:
- Ciencias de los materiales
- Ciencia de la separación
- Nanotecnología
Sus antecedentes:
- Las estructuras orgánicas covalentes microporosas (COF) son prometedoras para la separación de moléculas pequeñas.
- El diseño y la síntesis de COF para separaciones eficientes siguen siendo un reto.
Objetivo del estudio:
- Desarrollar COFs microporosos para la separación eficiente de los isómeros alquilo-aromáticos C8.
- Investigar el efecto de la interpenetración y la metalización del marco sobre el rendimiento de la separación de COF.
Principales métodos:
- Se han sintetizado cuatro COF 3D a base de sal y Zn (sal) mediante condensación en base de Schiff.
- Utilizó una estrategia de interpenetración del marco para crear marcos abiertos diamondoides.
- Se utiliza la cromatografía líquida de alto rendimiento (HPLC) para probar las capacidades de separación.
Principales resultados:
- Los cuatro COF eran isostruturales con marcos diamondoides 7 veces interpenetrados y canales tubulares estrechos.
- Salen-COF mostró una excelente separación de los isómeros de xileno y etilbenceno, logrando una resolución inicial.
- La separación de Zn (salen) -COF no se logró en alta resolución, lo que indica la importancia de los grupos salinos no coordinados.
- Salen-COF mostró una alta afinidad por el o-xileno, permitiendo una rápida separación en 7 minutos.
Conclusiones:
- La interpenetración del marco es una estrategia eficaz para el diseño de FOC microporosas para separaciones.
- Los COF no coordinados a base de salano son adecuados para la cromatografía líquida de alto rendimiento de isómeros aromáticos.
- Este trabajo amplía el potencial de aplicación de los materiales COF en las separaciones de isómeros.
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