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Liberación gradual de óxido nítrico fuertemente unido de Fe2 (NO) 2 (dobdc)
Eric D Bloch1, Wendy L Queen2,3, Sachin Chavan4
1†Department of Chemistry, University of California, Berkeley, California 94720, United States.
Journal of the American Chemical Society
|February 25, 2015
Resumen
Las estructuras metálico-orgánicas basadas en hierro (II) se unen fuertemente al óxido nítrico (NO), formando adutos Fe (III) -NO (−) de alta capacidad. Este material que no libera NO es prometedor para aplicaciones biomédicas.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- Los marcos metálico-orgánicos (MOF) ofrecen propiedades sintonizables para la adsorción de gases.
- Los MOF a base de hierro son de interés debido a la actividad redox del hierro.
- El óxido nítrico (NO) tiene una relevancia biológica e industrial significativa.
Objetivo del estudio:
- Para investigar las capacidades de unión de óxido nítrico (NO) de un marco metálico orgánico basado en hierro.
- Para caracterizar el adducto resultante y sus propiedades.
- Para explorar las posibles aplicaciones del material adsorbente de NO.
Principales métodos:
- Síntesis y caracterización de Fe2 (dobdc) MOF.
- Las mediciones de isoterma de adsorción de óxido nítrico (NO).
- Los análisis espectroscópicos (IR, UV-vis, Mössbauer) y la susceptibilidad magnética.
- Difracción de neutrones en polvo para la determinación estructural.
Principales resultados:
- Fe2 (((dobdc) exhibe una fuerte unión de óxido nítrico (NO) a 298 K.
- La capacidad de adsorción excede el 16 por ciento de peso, con una molécula de NO por centro de hierro.
- Los datos espectroscópicos y magnéticos confirman la transferencia de electrones para formar aductos Fe (III) -NO (−).
- La difracción de neutrones revela la longitud específica del enlace Fe-NO y el ángulo Fe-N-O.
Conclusiones:
- El MOF basado en hierro captura y une eficazmente el óxido nítrico (NO).
- El material demuestra la liberación controlada de NO en condiciones húmedas.
- Este MOF y materiales similares a base de hierro (II) son candidatos potenciales para aplicaciones biomédicas.
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