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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Estructura y propiedades de intercambio iónico de un nuevo borato de cobalto con una estructura de túnel "modelada"
Jesse L C Rowsell1, Nicholas J Taylor, Linda F Nazar
1Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
Journal of the American Chemical Society
|June 6, 2002
Resumen
Se sintetizó un nuevo borato anhidro, Na2Co2B12O21, y se descubrió que era el primer metaborato con una red de túneles. Sus iones de sodio son intercambiables, formando un material de zeotipo no silicio.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Ciencia de los materiales Ciencia de los materiales.
- Ingeniería de Cristal Ingeniería de Cristal.
Sus antecedentes:
- Los boratos son una clase diversa de compuestos inorgánicos con varios motivos estructurales.
- Las zeolitas y los zeotipos son materiales microporosos cristalinos con aplicaciones significativas en catálisis y separación.
- La síntesis de nuevos materiales de zeotipos no siliciosos es de gran interés para expandir las propiedades de los materiales.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo compuesto de borato anhidro.
- Investigar las propiedades estructurales del borato sintetizado, específicamente su dimensionalidad de red.
- Explorar las capacidades de intercambio iónico y el comportamiento potencial de zeotipo del nuevo material.
Principales métodos:
- Síntesis del método de flujo para la obtención de cristales simples.
- Difracción de rayos X monocristalino para la determinación precisa de la estructura.
- Experimentos de intercambio iónico para evaluar la sustitución catiónica y la absorción de agua.
Principales resultados:
- Síntesis exitosa de Na2Co2B12O21 anhidro mediante el método de flujo.
- El refinamiento de la estructura reveló una nueva red de túneles dentro de la estructura del metaborato (grupo espacial I2/a).
- Se ha demostrado el intercambio de iones Na+ con Li+ y la absorción de agua, formando Li2 ((H2O) 2Co2B12O21, un zeotipo no silicoso.
Conclusiones:
- Na2Co2B12O21 representa el primer metaborato que exhibe un marco de túnel.
- El material muestra características de zeotipo debido a sus propiedades de intercambio iónico.
- Este descubrimiento abre caminos para el desarrollo de nuevos materiales no siliciosos con aplicaciones potenciales similares a las zeolitas.
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