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Síntesis mediada por Pd de Ag33 Nanocúmulo quiral con estructura de núcleo en el grupo de puntos T
1School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Donghu New & High Technology Development Zone , Wuhan 430205 , PR China.
Journal of the American Chemical Society
|April 9, 2019
Resumen
Se sintetizó un nuevo nanocúmulo quiral de plata, Ag33 ((SCH2CH2Ph) 24 ((PPh34)), utilizando un método mediado por el paladio. Este descubrimiento presenta una nueva estructura quiral y una nueva estrategia para el desarrollo de nanoclusters.
Área de la Ciencia:
- Química inorgánica
- Ciencias de los materiales
- Nanotecnología
Sus antecedentes:
- Los nanocúmulos de plata están ganando atención por sus propiedades únicas.
- La quiralidad en los nanomateriales es crucial para varias aplicaciones.
- El desarrollo de nuevas estrategias sintéticas para nanoclusters complejos es un desafío continuo.
Objetivo del estudio:
- Para informar la síntesis y la estructura cristalina de un nuevo nanocúmulo de plata quiral.
- Para investigar el papel del paladio en la formación de nanoclusters.
- Explorar la estructura electrónica y la simetría del nuevo nanocúmulo.
Principales métodos:
- La síntesis mediada por el paladio.
- Difracción de rayos X de un solo cristal.
- Espectroscopia de resonancia magnética nuclear (RMN).
- Espectroscopia de dicroísmo circular electrónico (ECD).
- Cálculos de la teoría funcional de la densidad dependiente del tiempo (TD-DFT).
Principales resultados:
- Se sintetizó un nuevo nanocúmulo quiral de plata, Ag33 ((SCH2CH2Ph) 24 ((PPh34)), con una estructura electrónica de caparazón abierto.
- La estructura cristalina reveló un núcleo de icosaedro Keplerate Ag13 y un marco de caparazón Ag20S24P4 circundante.
- El nanocluster exhibe simetría de grupo de punto T y su quiralidad fue confirmada por RMN, ECD y TD-DFT.
- El paladio ((0) tetráquico (((trifenilfosfina) [Pd ((PPh3) 4) fue esencial para la síntesis.
Conclusiones:
- Se sintetizó y caracterizó con éxito una nueva estructura de nanocúmulo quiral de plata.
- El reactivo de paladio juega un papel crítico en la formación de este nanocúmulo único.
- Este trabajo ofrece una nueva estrategia sintética para el desarrollo de nanoclusters quirales.
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