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Los nanocúmulos Ag-S moleculares luminiscentes se encuentran en el grupo [Ag(62) S ((13) (((SBu ((t)) ((32))) ((BF
Gen Li1, Zhen Lei, Quan-Ming Wang
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China.
Journal of the American Chemical Society
|December 1, 2010
Resumen
Los investigadores informan del primer nanocúmulo molecular de sulfuro de plata (Ag2S) luminiscente. Este nuevo nanocúmulo de núcleo-caparazón exhibe una intensa emisión de luz roja tanto en estado sólido como en estado de solución.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- La luminiscencia en los nanocúmulos de sulfuro metálico es un área de investigación activa.
- Los nanocúmulos moleculares estructuralmente bien definidos ofrecen propiedades fotofísicas únicas.
Objetivo del estudio:
- Informar sobre la primera observación de luminiscencia de un nanocúmulo molecular de sulfuro de plata (Ag2S) estructuralmente bien definido.
- Para sintetizar y caracterizar un nuevo nanocúmulo Ag2S con una configuración de núcleo-capa.
Principales métodos:
- Síntesis del grupo tetracationico [Ag62S13(SBu(t)) 32](BF4) 4 a través de la reacción de AgSBu(t) / AgBF4 con N2H4 en el metanol.
- Caracterización estructural del nanocúmulo de núcleo y cáscara.
Principales resultados:
- El nanocúmulo sintetizado presenta un núcleo [Ag14S13] en un arreglo cúbico centrado en la cara, rodeado por una cáscara [Ag48(SBu(t)) 32 .
- El núcleo y la cáscara están interconectados a través de enlaces Ag-S e interacciones Ag···Ag.
- El nuevo cúmulo exhibe una intensa luminiscencia roja tanto en estado sólido como en estado de solución a temperatura ambiente.
Conclusiones:
- Se ha descubierto una nueva clase de nanocúmulos moleculares luminiscentes Ag2S con una estructura definida de núcleo y cáscara.
- Este hallazgo abre caminos para el desarrollo de nuevos materiales luminiscentes basados en nanocúmulos moleculares.
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