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Transformación reversible inducida por estímulos entre el oro decanuclear y el oro pentanuclear
Liang-Liang Yan1, Liao-Yuan Yao1, Maggie Ng1
1Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry, and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, P. R. China.
Journal of the American Chemical Society
|October 20, 2022
Resumen
Los nuevos complejos de oro (I) sulfuro exhiben transformaciones reversibles sin precedentes entre las estructuras decanucleares y pentanucleares. Esta transformación, desencadenada por estímulos, es estable durante múltiples ciclos y depende de la distancia de mordedura del ligando.
Área de la Ciencia:
- Química inorgánica
- Química supramolecular
- Ciencias de los materiales
Sus antecedentes:
- Los complejos de oro (I) sulfuro son de interés debido a sus estructuras únicas y aplicaciones potenciales.
- El control de la nuclealidad y el ensamblaje de los complejos metálicos es un desafío clave en la química de coordinación.
Objetivo del estudio:
- Para sintetizar y caracterizar el oro decanuclear y pentanuclear (I) complejos de sulfido utilizando los ligandos de difosfina basados en fenantreno y dibenzotiofeno.
- Investigar las transformaciones reversibles inducidas por estímulos entre diferentes nucleos de complejos de oro (I) sulfuro.
- Comprender la influencia de la estructura del ligando, específicamente la distancia de mordida P-P, en las transformaciones observadas.
Principales métodos:
- Síntesis de complejos de sulfuro de oro decanuclear y pentanuclear.
- Caracterización mediante espectroscopia de resonancia magnética nuclear (RMN).
- Espectroscopia de absorción UV para el seguimiento de las transformaciones en solución.
- Análisis de la relación entre la distancia de mordedura del ligando P-P y el comportamiento complejo.
Principales resultados:
- Síntesis y caracterización exitosas de nuevos complejos de sulfuro de oro.
- Observación de transformaciones reversibles inducidas por estímulos sin precedentes entre los complejos de oro decanuclear y pentanuclear.
- Demostración de la alta reversibilidad y estabilidad del complejo decanuclear durante 10 ciclos.
- Correlación del comportamiento de transformación con la distancia de mordida P-P de los ligandos de fosfina bidentados.
Conclusiones:
- Los complejos de oro decanuclear y pentanuclear pueden sufrir transformaciones reversibles.
- Las transformaciones observadas son sensibles a los estímulos y pueden ser monitoreadas espectroscópicamente.
- El diseño de los ligandos, en particular la distancia de mordida P-P, es crucial para controlar estos cambios estructurales reversibles.
- Estos hallazgos abren caminos para el desarrollo de materiales dinámicos de coordinación basados en grupos de sulfuro de oro.
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