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Modulación dual de un interruptor molecular con excepcionales propiedades quirópticas
Zhi Yuan Wang1, Erin K Todd, Xian Sheng Meng
1Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6. wangw@ccs.carleton.ca
Journal of the American Chemical Society
|August 18, 2005
Resumen
Los investigadores desarrollaron un interruptor molecular de modo dual con alta actividad óptica. Este interruptor responde tanto a la luz como a los campos eléctricos, lo que permite dispositivos moleculares y sensores avanzados.
Área de la Ciencia:
- Química molecular La química molecular es la química de las moléculas.
- Ciencia de los materiales ciencia de los materiales.
- La optoelectrónica es la óptica electrónica.
Sus antecedentes:
- Las propiedades quirópticas de las moléculas ópticamente activas pueden ser moduladas por estímulos externos.
- Esta modulación es clave para el desarrollo de interruptores moleculares, dispositivos de memoria, sensores y dispositivos fotónicos.
Objetivo del estudio:
- Diseñar y desarrollar un interruptor molecular quiróptico de modo dual.
- Investigar la respuesta de la molécula tanto a la luz como a los estímulos eléctricos para aplicaciones avanzadas.
Principales métodos:
- Síntesis de un compuesto o-terfenilo helicoidal que incorpora azobenzeno fotorresponsivo y grupos de imida electroactivos.
- Modulación de las propiedades quirópticas a través de la fotoisomerización (UV / luz visible) y las reacciones redox electroquímicas.
Principales resultados:
- La molécula diseñada exhibe una actividad óptica excepcional ([alfa]436 = -9500).
- La modulación reversible de las propiedades quirópticas se logró utilizando tanto la luz como el sesgo eléctrico.
- Se observaron grandes señales de lectura quiróptica (elíptica molar de hasta 285.000 deg.cm2.dmol-1) fueron observados.
Conclusiones:
- La molécula quiral desarrollada funciona como un interruptor molecular de doble modo.
- Su alta actividad óptica y capacidad de respuesta a la luz y los campos eléctricos lo hacen adecuado para interruptores moleculares avanzados, sensores y dispositivos ópticos.
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