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Transformación estructural inducida por disolvente en HOFs iónicos con luminiscencia mejorada

Yi Yang1, Bin Zhou1, Yu-Ying Dai1

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La regulación por disolventes cambia la estructura y la luminiscencia en los marcos orgánicos iónicos de enlace de hidrógeno (iHOFs). Esto conduce a una diferencia de intensidad de emisión 100 veces mayor entre iHOF-65 e iHOF-64, lo que ofrece información sobre el diseño de materiales cristalinos.

Palabras clave:
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Área de la Ciencia:

  • Ciencia de Materiales
  • Cristalografía
  • Fotoquímica

Sus antecedentes:

  • Los marcos orgánicos iónicos de enlace de hidrógeno (iHOFs) son materiales cristalinos con propiedades sintonizables.
  • La comprensión de las relaciones estructura-propiedad en los iHOFs es crucial para el desarrollo de materiales funcionales avanzados.

Objetivo del estudio:

  • Investigar el efecto de la regulación por disolventes en la estructura y luminiscencia de los iHOFs polimórficos.
  • Elucidar el mecanismo detrás del cambio de luminiscencia y los cambios de conjugación inducidos por las moléculas de disolvente.

Principales métodos:

  • Síntesis y caracterización de dos polimorfos distintos de iHOF.
  • Experimentos de difusión de vapor de disolvente para inducir transiciones estructurales.
  • Espectroscopía de fotoluminiscencia para cuantificar las propiedades de emisión.

Principales resultados:

  • La regulación por disolventes indujo con éxito el cambio estructural entre dos polimorfos de iHOF.
  • Se observó una diferencia significativa en la intensidad de emisión (aproximadamente 100 veces) entre las dos formas reguladas por disolvente.
  • Los cambios de conjugación se correlacionaron con el cambio de luminiscencia observado.

Conclusiones:

  • Las moléculas de disolvente desempeñan un papel fundamental en el control de la estructura y la luminiscencia de los iHOFs.
  • El estudio proporciona una referencia valiosa para el diseño de materiales cristalinos regulados por disolventes con propiedades estructurales y luminiscentes dinámicas.