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Luminiscencia orgánica de larga duración dependiente de la longitud de onda originada por la transferencia de
Zhongwei Man1,2, Zheng Lv1,2, Zhenzhen Xu2
1Institute of Molecular Plus (IMP), Tianjin University, Tianjin 300072, P. R. China.
Journal of the American Chemical Society
|June 28, 2022
Resumen
Los investigadores desarrollaron nuevos materiales luminiscentes que cambian de color en función de la longitud de onda de excitación. Estos materiales permiten el cifrado avanzado de la información y las aplicaciones contra la falsificación.
Área de la Ciencia:
- Ciencias de los materiales
- Química orgánica
- La fotofísica
Sus antecedentes:
- Los materiales luminiscentes sensibles a los estímulos son cruciales para aplicaciones avanzadas como el cifrado de información y la lucha contra la falsificación.
- El control del color y la persistencia de la emisión es clave para desarrollar materiales funcionales.
Objetivo del estudio:
- Desarrollar una nueva estrategia para manipular las vías de transferencia de protones en los derivados de saliciladehído.
- Para lograr una luminiscencia ajustable y conmutable dependiente de la longitud de onda de excitación (Ex-De).
- Para crear materiales para el cifrado de información de varios niveles.
Principales métodos:
- Derivado del salicilaldehído EQCN utilizado en soluciones y polvos.
- Caminos de transferencia de protones investigados, incluida la transferencia intramolecular de protones en estado excitado (ESIPT) y la transferencia de protones de largo alcance en estado excitado (ESLRPT).
- Efectos sinérgicos empleados entre el EQCN y la matriz de tereftalato de dimetilo (DTT) en polvos.
Principales resultados:
- Las emisiones alcanzadas con capacidad de conmutación (azul, verde, naranja) dependen de la longitud de onda de excitación.
- Se demostró que los diferentes colores se originan en distintas vías de transferencia de protones (formas de enol, Keto-1 y Keto-2).
- Se ha generado con éxito una luminiscencia de larga duración Ex-De (Ex-De-LPL) en polvos EQCN@DTT.
Conclusiones:
- El estudio presenta una nueva estrategia para crear materiales orgánicos Ex-De puros con luminiscencia ajustable.
- Los resultados ofrecen una guía para el desarrollo de materiales de luminiscencia persistente (LPL) basados en ESLRPT.
- Los materiales desarrollados muestran potencial para aplicaciones de encriptación de información a varios niveles.
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