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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
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La microscopía electrónica de transmisión revela deposición de revestimientos de óxido metálico en marcos orgánicos
Michael S Denny1, Lucas R Parent1, Joseph P Patterson1,2
1Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093, United States.
Journal of the American Chemical Society
|December 23, 2017
Resumen
La modificación posintética de los marcos metal-orgánicos (MOF) a través del intercambio de iones metálicos es un desafío. Se confirma el intercambio de ligandos, pero la deposición de metal forma estructuras de óxido de metal.
Área de la Ciencia:
- Ciencias de los materiales
- Química
Sus antecedentes:
- La modificación post-sintética (PSM) de las estructuras metal-orgánicas (MOF) mejora su funcionalidad.
- En trabajos anteriores se informó de un intercambio postsinthetico (PSE) exitoso de iones metálicos y ligandos en UiO-MOF.
Objetivo del estudio:
- Reevaluar el PSE de iones metálicos en las UIO-MOF.
- Para investigar el ligando PSE en las UiO-MOF.
- Para entender la naturaleza de la deposición de metal durante el PSM.
Principales métodos:
- Espectrometría de masa de plasma acoplada por inducción (ICP-MS) para el análisis elemental.
- Microscopía electrónica de transmisión (TEM) para la caracterización estructural y morfológica.
- Caracterización analítica detallada de los materiales MOF.
Principales resultados:
- La deposición de iones metálicos en los UiO-MOF forma óxidos metálicos a nanoescala, no sitios intercambiados internamente.
- El PSE basado en ligandos se confirma en estos MOF.
- La caracterización revela arquitecturas híbridas de óxido de metal.
Conclusiones:
- La caracterización rigurosa es crucial para la asignación precisa de la composición y la estructura de MOF.
- El ion metálico PSE en los UiO-MOF conduce a la formación de óxidos metálicos en la superficie.
- Ligand PSE ofrece una vía viable para la modificación de MOF.
- Se establece un nuevo método para crear sólidos híbridos de óxido de metal MOF.
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