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Cuadros orgánicos covalentes cristalinos vinculados a ésteres

Chenfei Zhao1, Hao Lyu1, Zhe Ji1

  • 1Department of Chemistry, Kavli Energy Nanoscience Institute, and Berkeley Global Science Institute, University of California-Berkeley, Berkeley, California 94720, United States.

Journal of the American Chemical Society
|August 14, 2020
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores sintetizaron estructuras orgánicas covalentes cristalinas y porosas (COF) utilizando enlaces de éster. Este avance expande la química reticular y ofrece nuevos materiales para aplicaciones porosas.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Química orgánica
  • La cristalografía

Sus antecedentes:

  • Las estructuras orgánicas covalentes (COF) son polímeros porosos cristalinos.
  • Los FOC existentes a menudo utilizan enlaces distintos de los ésteres.
  • El logro de estructuras grandes y ordenadas en los FOC es un desafío importante.

Objetivo del estudio:

  • Síntesis y caracterización de nuevas estructuras orgánicas covalentes cristalinas ligadas a ésteres (COF).
  • Explorar el potencial de las reacciones de transesterificación para la síntesis de COF.
  • Ampliar el alcance de la química reticular para incluir los COF ligados a ésteres.

Principales métodos:

  • Reacciones de transesterificación entre los carboxilatos aromáticos ditópicos 2-piridinales y los fenoles tri o tetratópicos.
  • Cristalización de los COF ligados al éster resultantes.
  • Caracterización estructural mediante difracción de rayos X y análisis de la superficie.

Principales resultados:

  • Síntesis exitosa de COFs cristalinos y porosos ligados a ésteres (COF-119 a COF-122).
  • Los COF se obtuvieron en topologías de kgm y hcb con grandes superficies de hasta 2092 m2/g.
  • COF-122 exhibió bordes cristalinos extendidos, comparables a los marcos metálicos orgánicos.

Conclusiones:

  • Este trabajo demuestra la primera síntesis de COF ligados a ésteres cristalinos.
  • Los hallazgos amplían la aplicabilidad de los principios de la química reticular.
  • Los FOC desarrollados están estructuralmente relacionados con los poliésteres comunes, lo que abre nuevas vías de diseño de materiales.