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Área de la Ciencia:

  • Química de los materiales
  • Química supramolecular
  • Nanotecnología

Sus antecedentes:

  • La síntesis de marcos orgánicos covalentes 3D (COF) con nuevas topologías es difícil.
  • Los COF 3D existentes están limitados a bloques de construcción tetraédricos.

Objetivo del estudio:

  • Para demostrar la síntesis dirigida de un COF aniónico 3D con una red de tres coordenadas.
  • Ampliar la diversidad geométrica de las estructuras de COF.

Principales métodos:

  • Se utilizó un nuevo enlace para los COF de silicato aniónico basado en nodos de silicio hipercoordinados.
  • Nodos hexacoordinados dianiónicos reticulados [SiO6]2 con bloques de construcción de trifenileno.
  • Control de la nucleación y las tasas de crecimiento mediante la generación gradual de fuentes de silicio.

Principales resultados:

  • Se sintetizó con éxito el SiCOF-5, un COF aniónico 3D.
  • El SiCOF-5 se cristaliza en una red srs-c de doble interpenetración.
  • El marco tiene la composición Na2[Si ((C18H6O6) ].

Conclusiones:

  • Se ha logrado la síntesis de un nuevo COF aniónico 3D con una topología de red srs.
  • Demostró la utilidad de los nodos de silicio hipercoordinados en la construcción de COF.
  • Destacó la importancia de la cinética de reacción controlada para una cristalización exitosa.