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Reacciones de desplazamiento nucleófilo de los calcogenolatos orgánicos metálicos a base de plata
Qiaoling Fan1,2, Maggie C Willson1,2, Kristen A Foell1,2
1Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States.
Journal of the American Chemical Society
|October 23, 2024
Resumen
Desarrollamos un nuevo método de intercambio de ligandos para crear calcogenolatos orgánicos metálicos complejos a base de plata (MOChas). Este enfoque permite la síntesis de MOC más grandes, anteriormente inaccesibles, con estructuras y propiedades diversas.
Área de la Ciencia:
- Ciencias de los materiales
- Química inorgánica
- La cristalografía
Sus antecedentes:
- Los calcogenolatos orgánicos metálicos (MOChas) son materiales cristalinos con topologías inorgánicas sintonizables en 1D o 2D.
- La síntesis actual de MOCha a menudo está limitada por pequeños ligandos, lo que lleva a una morfología pobre y estructuras indeterminadas.
- Los ligandos más grandes son deseables para crear MOCs más complejos, pero son difíciles de incorporar.
Objetivo del estudio:
- Superar las limitaciones en la síntesis de MOCha mediante el desarrollo de una nueva estrategia de intercambio de ligandos.
- Para permitir la preparación de MOC de mayor dimensión e incorporar ligandos orgánicos más grandes.
- Investigar el mecanismo de intercambio de ligandos en las MOC.
Principales métodos:
- Reacción de intercambio de ligandos utilizando un 1D MOCha (argento) como fuente de plata para la síntesis de 2D MOCha.
- Caracterización de los productos de reacción y estudios mecánicos del intercambio de calogenol y dicalcogenuro.
- Cristalografía de femtosegundos en serie de pequeñas moléculas (smSFX) para la determinación estructural de nuevas MOC.
Principales resultados:
- Se ha demostrado la síntesis exitosa de MOCas 2D a partir de precursores 1D mediante desplazamiento nucleófilo.
- Muestra preferencia por desplazar topologías 1D para obtener 2D y tiolatos con selenolatos.
- Se han obtenido con éxito, mediante este método, oligofeniles MOC previamente inaccesibles.
Conclusiones:
- La estrategia de intercambio de ligandos desarrollada proporciona una nueva ruta sintética para MOCs y heteroestructuras elaboradas.
- Este método facilita la incorporación de ligandos orgánicos más grandes y complejos en los marcos MOCha.
- El estudio aclara el mecanismo de sustitución nucleofílica que rige el intercambio de ligandos en las MOC.
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