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Isomerismo topológico en marcos orgánicos covalentes tridimensionales
Yaozu Liu1, Jingwei Li2, Jia Lv2
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Journal of the American Chemical Society
|April 18, 2023
Resumen
Los investigadores sintetizaron los primeros isómeros topológicos en marcos orgánicos covalentes 3D (COF) utilizando un bloque de construcción tetraédrico. Estos isómeros, JUC-620 (dia net) y JUC-621 (qtz net), exhiben tamaños de poros y propiedades de adsorción distintos.
Área de la Ciencia:
- Ciencias de los materiales
- Química orgánica
- Nanotecnología
Sus antecedentes:
- El isomerismo es común en la química orgánica, pero es raro en los marcos orgánicos covalentes (COF).
- El control de las estructuras topológicas en 3D COF sigue siendo un desafío.
Objetivo del estudio:
- Informar sobre la primera síntesis controlable de isómeros topológicos en COF 3D.
- Investigar las diferencias estructurales y de propiedades entre estos isómeros.
Principales métodos:
- Síntesis de COF 3D utilizando una unidad de construcción tetraédrica distintiva bajo diferentes disolventes.
- Determinación de la estructura mediante difracción de rayos X en polvo y microscopía electrónica de transmisión.
Principales resultados:
- Se han sintetizado con éxito dos isómeros topológicos: JUC-620 (dia net) y JUC-621 (qtz net).
- JUC-621 (red qtz) exhibe mesóforos más grandes (∼23 Å) y una mayor superficie (∼2060 m2 g−1) en comparación con JUC-620 (red dia, ∼12 Å, 980 m2 g−1).
- JUC-621 muestra un rendimiento superior en la eliminación de moléculas de colorante y la adsorción de yodo (6,7 g g-1) en comparación con JUC-620 (2,9 g g-1).
Conclusiones:
- Se ha desarrollado una nueva estrategia para la construcción de isómeros de COF.
- La diversidad estructural de los FOC puede lograrse mediante el control isomérico.
- Estos isómeros de COF demuestran aplicaciones prometedoras en adsorción y separación.
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