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Cristales de carbonato de fluoruro de tierra alcalino-alcalino ABCO3F (A = K, Rb, Cs; B = Ca, Sr, Ba) como materiales
Guohong Zou1, Ning Ye, Ling Huang
1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, PR China.
Journal of the American Chemical Society
|November 1, 2011
Resumen
Se sintetizaron y caracterizaron nuevos carbonatos de fluoruro de tierra alcalino-alcalina. Estos materiales exhiben estructuras cristalinas en capas únicas y demuestran propiedades ópticas no lineales prometedoras, con significativos coeficientes de generación de segunda armonía.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Química del estado sólido.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los carbonatos de fluoruro son una clase emergente de compuestos inorgánicos con aplicaciones potenciales en óptica.
- Comprender las relaciones estructura-propiedad de los nuevos carbonatos de fluoruro es crucial para el desarrollo de materiales avanzados.
Objetivo del estudio:
- Para sintetizar y caracterizar una nueva serie de carbonatos alcalino-alcalinos de fluoruro de tierra alcalina.
- Investigar las estructuras cristalinas, la absorción óptica y las propiedades de generación de segunda armonía (SHG) de estos nuevos compuestos.
Principales métodos:
- Cristalización espontánea utilizando flujos fundidos para la síntesis.
- Cristalografía de rayos X para la determinación estructural.
- Espectroscopia de reflectancia difusa UV-vis para el análisis de la absorción óptica.
- Técnica de Kurtz y Perry para mediciones de generación de segundo armónico (SHG).
Principales resultados:
- Se sintetizaron seis nuevos compuestos: KS rCO ((3) F, RbSrCO ((3) F, KCaCO ((3) F, RbCaCO ((3) F, CsCaCO ((3) F y Cs ((3) Ba ((4) CO ((3)) ((3) F)).
- Las estructuras cristalinas cuentan con [AF](∞) y [B(CO(3)) ](∞) capas apiladas con triángulos coplanares [CO(3).
- Los bordes de absorción de longitud de onda corta están por debajo de 200 nm (excepto para Cs(3) Ba(4) CO(3))(3) F(5) a ~210 nm).
- Todos los carbonatos sintetizados son compatibles en fase y exhiben coeficientes SHG significativos, que oscilan entre 1.11 y 3.61 veces el de KDP.
Conclusiones:
- Los carbonatos de fluoruro sintetizados poseen estructuras en capas únicas y amplios espacios de banda.
- Estos materiales demuestran excelentes propiedades ópticas no lineales, lo que los hace adecuados para aplicaciones visibles y UV.
- El estudio amplía la biblioteca de materiales inorgánicos funcionales con potencial para dispositivos ópticos.
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