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Transformación estructural reversible inducida por la foto y la temperatura entre el oro dodecanuclear y el oro
Liang-Liang Yan1, Vivian Wing-Wah Yam1
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
|March 21, 2023
Resumen
Dos nuevos grupos de oro (I) sulfuro exhiben una notable transformación estructural sensible a los estímulos. La luz UV y la temperatura pueden convertir de manera reversible estos grupos, allanando el camino para nuevos materiales sensibles.
Área de la Ciencia:
- Química inorgánica
- Ciencias de los materiales
- Química supramolecular
Sus antecedentes:
- La transformación estructural sensible a los estímulos es crucial para imitar las funciones biológicas.
- Los grupos de sulfuro de oro ofrecen propiedades únicas para materiales avanzados.
- El diseño de ligandos específicos es clave para controlar el comportamiento del clúster.
Objetivo del estudio:
- Para sintetizar y caracterizar sin precedentes dodecanuclear y pentadecanuclear oro (I) grupos de sulfuro.
- Investigar la interconversión de respuesta a estímulos entre estos grupos.
- Elucidar el mecanismo de la transformación de grupo a grupo inducida por la foto.
Principales métodos:
- Síntesis de grupos de sulfuro de oro utilizando un ligando de fosfina tridentado (L).
- Caracterización estructural de los grupos dodecanucleares (Au12) y pentadecanucleares (Au15).
- Monitoreo de las transformaciones estructurales mediante la espectroscopia de resonancia magnética nuclear (RMN), la espectrometría de masas de ionización por electrospray de alta resolución (HR-ESI-MS) y la espectroscopia de absorción UV-vis.
- Investigando el comportamiento de respuesta al estímulo provocado por la luz UV y la temperatura.
Principales resultados:
- Síntesis exitosa de dos nuevos grupos de sulfuro de oro: Au12 y Au15.
- Demostración de la interconversión estructural reversible entre Au12 y Au15 inducida por la luz UV y la temperatura.
- Conocimientos mecanicistas detallados sobre la transformación de racimo a racimo inducida por la foto.
- Confirmación del papel crucial del ligando L en la dirección del ensamblaje y la transformación del racimo.
Conclusiones:
- Este estudio presenta un nuevo paradigma para las transformaciones de clúster a clúster inducidas por la foto utilizando ligandos de fosfina polidentados.
- Los grupos de sulfuro de oro desarrollados muestran un potencial significativo para la construcción de nuevos materiales sensibles a los estímulos.
- Los hallazgos abren nuevas vías para el diseño de materiales funcionales avanzados con propiedades ajustables.
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