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Formas polimórficas de un complejo de oro (((I) arylacetiluro con características fosforescentes contrastantes
Wei Lu1, Nianyong Zhu, Chi-Ming Che
1Department of Chemistry and HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
Journal of the American Chemical Society
|December 18, 2003
Resumen
Los complejos de oro ((I) arylacetiluro exhiben una fosforescencia sintonizable basada en la estructura molecular. El empaque de cristales y la naturaleza del estado excitado influyen significativamente en las propiedades de emisión de luz en estos materiales luminiscentes.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- La fotofísica es la fotofísica.
- Química del estado sólido.
Sus antecedentes:
- Se investigan complejos de oro (I) con ligandos de arilacetiluro por sus propiedades luminiscentes.
- La comprensión de las relaciones estructura-propiedad es crucial para el diseño de nuevos materiales fosforescentes.
Objetivo del estudio:
- Para examinar las propiedades espectroscópicas y las estructuras cristalinas de oro (I) complejos de arylacetiluros.
- Para correlacionar la estructura molecular y cristalina con la fosforescencia observada.
Principales métodos:
- Análisis espectroscópico (absorción y emisión de rayos UV-Vis)
- Cristalografía de rayos X con rayos X.
- Estudios de luminiscencia con temperatura variable y estudios de luminiscencia con temperatura variable.
Principales resultados:
- Se identificaron dos polimorfos de un complejo de oro (I) (R) (P) (Au) (Ctbd1;CAr) con comportamientos fosforescentes distintos.
- Las propiedades emisoras están vinculadas a la orientación de los dipolos moleculares y ángulos diédricos entre las fracciones de arylacetiluro.
- Los complejos 2-4 y el polimorfo emisor de 1 muestran una fuerte fosforescencia a temperatura ambiente.
Conclusiones:
- Las características fosforescentes de estos cristales de oro ((I) arylacetiluro están determinadas por la naturaleza del estado excitado y las interacciones intermoleculares.
- El empaque de cristales, específicamente el ángulo diédrico entre lumóforos adyacentes, juega un papel crítico en la modulación de la luminiscencia.
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