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Un descriptor general ΔE permite el desarrollo cuantitativo de materiales luminiscentes basados en la transferencia
Weijie Chi1, Jie Chen2, Wenjuan Liu2
1Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore.
Journal of the American Chemical Society
|March 18, 2020
Resumen
Los investigadores desarrollaron un nuevo descriptor, ΔE, para predecir los rendimientos cuánticos para las sondas de transferencia de electrones fotoinducidas (PET). Este avance permite el diseño racional de nuevos materiales funcionales basados en PET para aplicaciones avanzadas de bioimagen.
Área de la Ciencia:
- Ciencias de los materiales
- La fotoquímica
- Biotecnología
Sus antecedentes:
- La transferencia de electrones fotoinducida (PET) es un mecanismo clave en el desarrollo de sondas fluorescentes y biosensores.
- La predicción precisa de los rendimientos cuánticos es esencial para el avance de los materiales funcionales basados en PET.
Objetivo del estudio:
- Desarrollar un descriptor general para predecir el rendimiento cuántico de las sondas PET.
- Establecer un valor umbral para el diseño eficiente de la sonda de PET.
- Permitir el diseño racional de nuevos fluoróforos basados en PET.
Principales métodos:
- Desarrollo de un descriptor general, ΔE, para predecir los rendimientos cuánticos.
- Análisis de la relación entre ΔE y rendimiento cuántico en diversos entornos.
- Validación del descriptor en varias familias de fluoróforos (BODIPY, fluoresceína, rodamina y Si-rodamina).
Principales resultados:
- Se identificó un valor umbral de aproximadamente 0,6 eV para ΔE.
- Se observan rendimientos cuánticos bajos (<2%) cuando ΔE < 0,6 eV debido a la activación de PET en entornos polares.
- Se obtienen rendimientos cuánticos altos cuando ΔE > 0,6 eV debido a la inhibición del PET.
Conclusiones:
- El descriptor ΔE predice efectivamente los rendimientos cuánticos para las sondas PET.
- Este descriptor facilita el diseño de nuevas aplicaciones para las sondas de PET existentes.
- Permite el diseño cuantitativo de nuevos fluoróforos a base de PET para aplicaciones como la bioimagen sin lavado y el desarrollo de AIEgen.
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