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IrF8 Cristal molecular bajo alta presión

Jianyan Lin1, Ziyuan Zhao1, Chunyu Liu1

  • 1Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China.

Journal of the American Chemical Society
|March 14, 2019
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Los científicos descubrieron un nuevo compuesto de fluoruro de Iridio (IrF8) bajo alta presión. Este material rico en F exhibe un fuerte potencial oxidante, superando a los agentes existentes y abriendo caminos para nuevas aplicaciones químicas.

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Área de la Ciencia:

  • Química inorgánica
  • Ciencias de los materiales
  • Química computacional

Sus antecedentes:

  • Los fluoruros de metales de transición son cruciales para los estados de oxidación altos y las aplicaciones como agentes oxidantes / fluorantes.
  • La estequiometría F más alta conocida en los fluoruros de metales de transición neutros es de 7.
  • La exploración de compuestos ricos en F es clave para avanzar en la química de la oxidación.

Objetivo del estudio:

  • Para identificar nuevos fluoruros de metales de transición ricos en F.
  • Investigar las propiedades y la estabilidad de los fluoruros de iridio de alta estequiometría.
  • Para explorar el potencial de estos compuestos como poderosos agentes oxidantes.

Principales métodos:

  • Los primeros cálculos de búsqueda de la estructura de inteligencia de enjambre.
  • Simulaciones de alta presión para predecir las fases estables.
  • Análisis de la estructura electrónica y los estados de oxidación.

Principales resultados:

  • Identificación de un nuevo compuesto de IrF8 con un estado de oxidación de Iridio (+8).
  • El descubrimiento de tres fases distintas de IrF8 con estructuras cristalinas moleculares.
  • Se observa un aumento de la simetría estructural con el aumento de la presión.
  • Afinidades de electrones pronosticadas comparables o superiores al PtF6.

Conclusiones:

  • El descubrimiento de IrF8 expande los límites conocidos de la estequiometría F en los fluoruros de metales de transición.
  • La alta presión facilita la formación de estos compuestos ricos en F a través de mecanismos de transferencia de carga.
  • Las propiedades predichas sugieren IrF8 como un nuevo agente oxidante potente.