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Updated: May 5, 2026
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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
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Conjunto reticular controlado cinéticamente de un marco orgánico metálico de Ni (II) -pirazolato químicamente estable
Tao He1, Zhehao Huang2, Shuai Yuan3
1Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental Chemical Engineering, Beijing University of Technology, Beijing 100124, PR China.
Journal of the American Chemical Society
|July 14, 2020
Resumen
Se sintetizaron estructuras orgánicas metálicas (MOF) químicamente estables con grandes mesóporos. El MOF BUT-33 favorecido cinéticamente muestra un rendimiento catalítico superior en las reacciones de acoplamiento carbono-carbono.
Área de la Ciencia:
- Ciencias de los materiales
- Química
- Nanotecnología
Sus antecedentes:
- Las aplicaciones de los marcos metálicos orgánicos (MOF) están limitadas por la escasa estabilidad química y el pequeño tamaño de los poros.
- El desarrollo de MOF robustos con grandes mesoporos es un desafío sintético significativo.
Objetivo del estudio:
- Para sintetizar MOFs robustos y mesoporosos de Ni (II) -pirazolato con mayor actividad catalítica.
- Investigar el papel del control cinético frente al termodinámico en la síntesis de MOF.
Principales métodos:
- Expansión isoreticular utilizando un ligando de pirazolato con la misma conformación.
- Síntesis controlada ajustando las condiciones de reacción para favorecer los productos cinéticos o termodinámicos.
- Difracción de rayos X de un solo cristal para la determinación estructural.
- Evaluación catalítica en las reacciones de acoplamiento carbono-carbono.
Principales resultados:
- Se sintetizaron con éxito dos MOFs de Ni (II) pirazolato químicamente estables, el BUT-32 (microporo, termodinámico) y el BUT-33 (mesoporo, cinético).
- BUT-33 exhibe mesoporos de 2,6 nm, sitios accesibles de Ni (II) y una estabilidad excepcional en condiciones adversas (4 M NaOH, 1 M Grignard).
- BUT-33 demostró un rendimiento catalítico superior en las reacciones de acoplamiento carbono-carbono en comparación con BUT-32 y otros Ni (II) -MOF.
Conclusiones:
- El control cinético es crucial para sintetizar MOF mesoporosos con propiedades deseables.
- El mesoporoso BUT-33 MOF muestra un potencial significativo para la catálisis heterogénea debido a su estabilidad y sitios activos.
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