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Integración de la bifuncionalidad y la estabilidad química en marcos orgánicos covalentes a través de reacciones
Prasenjit Das1, Gouri Chakraborty2, Jérôme Roeser1
1Department of Chemistry/Functional Materials, Technische Universität Berlin, 10623 Berlin, Germany.
Journal of the American Chemical Society
|January 25, 2023
Resumen
Las estructuras orgánicas covalentes químicamente estables (COF) sintetizadas mediante reacciones multicomponentes muestran una evolución mejorada del peróxido de hidrógeno fotocatalítico. Estos materiales ofrecen una plataforma prometedora para la conversión de energía química solar.
Área de la Ciencia:
- Ciencias de los materiales
- Fotocatálisis
- Química orgánica
Sus antecedentes:
- Las estructuras orgánicas covalentes (COF) son materiales porosos avanzados con propiedades sintonizables.
- Las reacciones multicomponentes (MCR) ofrecen vías eficientes para sintetizar estructuras moleculares complejas.
- La evolución del peróxido de hidrógeno fotocatalítico (H2O2) es crucial para los procesos de oxidación industrial.
Objetivo del estudio:
- Para sintetizar nuevos COF bifuncionales utilizando la reacción multicomponente de Doebner.
- Evaluar el rendimiento fotocatalítico de estos MCR-COF para la evolución del H2O2.
- Comparar la eficiencia y la estabilidad de los MCR-COF con los COF tradicionales basados en imina.
Principales métodos:
- Utilizó la reacción de Doebner de tres componentes para sintetizar los COF basados en ácido quinolina-4-carboxílico (DMCR-COF).
- Investigó la bifuncionalidad ácido-base de los DMCR-COF sintetizados.
- Se ha evaluado la evolución fotocatalítica del H2O2 en diversas condiciones (oxidantes de sacrificio, agua pura, atmósfera de O2/aire).
- Se evaluó la fotostabilidad, durabilidad y reciclabilidad de los DMCR-COF.
Principales resultados:
- Se han sintetizado con éxito cuatro DMCR-COF químicamente estables con bifuncionalidad ácido-base inherente.
- Los DMCR-COF demostraron una evolución fotocatalítica superior de H2O2 en comparación con los análogos de COF de imina.
- Se observó una alta actividad fotocatalítica incluso en agua pura y bajo aire/oxígeno ambiente.
- Los DMCR-COF sintetizados mostraron una excelente fotostabilidad, durabilidad y reciclabilidad.
Conclusiones:
- La reacción multicomponente de Doebner es una estrategia efectiva para crear COF funcionales y estables.
- Los DMCR-COF representan una clase prometedora de materiales para una producción química eficiente impulsada por la energía solar.
- Estos MCR-COF ofrecen una plataforma de materiales viables para la conversión sostenible de energía solar a energía química.
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