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Patterning via Optical Saturable Transitions - Fabrication and Characterization
Published on: December 11, 2014
Conmutación reversible de tres estados de luminiscencia: un nuevo giro en el comportamiento electro y fotocrómico
Wesley R Browne1, Michael M Pollard, Ben de Lange
1Department of Organic and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Journal of the American Chemical Society
|September 21, 2006
Resumen
Los investigadores informan de una emisión azul / roja / apagada reversible en tres estados en foto- / electrocrómico bis-thiaxanthylidenes. Esta luminiscencia controlable ofrece potencial para materiales ópticos avanzados y conmutadores.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- La fotoquímica es la fotoquímica.
- La electroquímica es electroquímica.
Sus antecedentes:
- Los bis-tiaxantilidos son compuestos orgánicos con potenciales propiedades fotocrómicas y electrocrómicas.
- El control de la luminiscencia en los materiales orgánicos es clave para el desarrollo de dispositivos ópticos avanzados.
Objetivo del estudio:
- Para reportar la emisión totalmente reversible de tres estados azul/rojo/fuera de los bis-thiaxanthylidenes sustituidos.
- Investigar los mecanismos fotoquímicos y electroquímicos de conmutación de estas emisiones.
Principales métodos:
- Conversión fotoquímica entre conformes plegados.
- Oxidación electroquímica y reducción de los bis-tiaxantilidos.
- Análisis espectroscópico de los estados de luminiscencia.
Principales resultados:
- Los conformadores estables (anti-doblados) exhiben luminiscencia azul que se puede apagar a través de la conversión fotoquímica a conformadores metaestables (syn-doblados).
- La reversión térmica restaura la luminiscencia azul.
- Luminiscencia roja observada en la dication bis-thiaxanthylium, que se puede encender mediante la oxidación (aprox. 1.0-1.2 V vs SCE) y apagado o azul por reducción (aprox. 0,35 V frente a la SCE).
Conclusiones:
- Los bis-tiaxantilidos sustituidos demuestran una emisión controlada de tres estados.
- Los estímulos fotoquímicos y electroquímicos pueden ajustar con precisión el color y el estado de la luminiscencia.
- Estos hallazgos allanan el camino para nuevos materiales foto y electrocrómicos con propiedades ópticas sintonizables.
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