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FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
Published on: August 20, 2012
Un convertidor de frecuencia de ultravioleta a infrarrojo cercano basado en FRET
Jason M Serin1, Darryl W Brousmiche, Jean M J Fréchet
1Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA.
Journal of the American Chemical Society
|October 3, 2002
Resumen
Este estudio detalla un dendrimero con tintes de cumarina 2 y un núcleo de perilenobis (dicarboximida). Transfiere eficientemente la luz UV a través de la transferencia de energía de resonancia de fluorescencia (FRET), amplificando la emisión de infrarrojo cercano.
Área de la Ciencia:
- Química supramolecular de las moléculas.
- La fotofísica es la fotofísica.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los dendrímeros ofrecen arquitecturas únicas a nanoescala para la recolección de luz.
- La cumarina 2 y el perilenobis (dicarboximida) son conocidos por sus propiedades fotofísicas.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo dendrimero para la transferencia eficiente de energía.
- Para investigar las propiedades fotofísicas de un sistema de cumarina-perilenobis (dicarboximida).
Principales métodos:
- Síntesis de una generación 1 de dendrimeros.
- Caracterización fotofísica que incluye la absorción UV-Vis y la espectroscopia de emisión.
- Análisis de transferencia de energía de resonancia de fluorescencia (FRET).
Principales resultados:
- Transferencia de energía eficiente (99%) de los donantes de cumarina 2 al núcleo de perilenobis (dicarboximida).
- Emisión de infrarrojo cercano observada desde el núcleo.
- 6.2 veces la amplificación de la emisión a través de FRET en comparación con la excitación directa.
Conclusiones:
- El dendrimero sintetizado recoge eficazmente la luz UV y la canaliza hacia el núcleo.
- Este sistema demuestra una amplificación significativa de la luz en la región del infrarrojo cercano.
- Aplicaciones potenciales en dispositivos de recolección de luz y optoelectrónicos.
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