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Conductividad de protones anhidros fotoexcitados en vidrio polimérico de coordinación
Nattapol Ma1, Sarawoot Impeng2, Sareeya Bureekaew3
1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Journal of the American Chemical Society
|April 19, 2023
Resumen
Los investigadores desarrollaron materiales de conducción de protones con capacidad de conmutación óptica para circuitos iónicos artificiales. Este nuevo vidrio de polímero de coordinación transparente muestra un aumento significativo en la conductividad de protones tras la exposición a la luz.
Área de la Ciencia:
- Ciencias de los materiales
- Química del estado sólido
- Optoelectrónica y sus derivados
Sus antecedentes:
- Los materiales de conducción de protones con conmutación óptica son cruciales para el avance de los circuitos iónicos artificiales.
- Las plataformas existentes a menudo se enfrentan a limitaciones como la dependencia de los invitados, la baja transmitancia y la mala procesabilidad debido a la dependencia de los cambios conformacionales cristalinos.
Objetivo del estudio:
- Desarrollar un nuevo material transparente para controlar ópticamente la conductividad del protón anhidro.
- Para superar las limitaciones de los materiales de conducción de protones con conmutación de corriente.
Principales métodos:
- Se utilizó un vidrio de polímero de coordinación transparente (CP) que incorpora un complejo de tris (bipirazina) rutenio (II) fotoexcitable.
- Utilizó la fotoexcitación para modular la conductividad de los protones.
- Se realizaron espectroscopias y estudios de la teoría funcional de la densidad (DFT) para dilucidar el mecanismo.
Principales resultados:
- Se logró un aumento reversible en la conductividad de protones anidrosos por un factor de 181,9 tras la fotoexcitación.
- Se redujo la barrera de energía de activación para la migración de protones de 0,76 eV a 0,30 eV.
- Se ha demostrado un control preciso de la conductividad mediante la modulación de la intensidad luminosa y la temperatura ambiente.
Conclusiones:
- El vidrio CP desarrollado ofrece una plataforma prometedora para la conductividad de protones anidrosos controlados ópticamente.
- La fotoexcitación del complejo de rutenio mejora efectivamente la movilidad de los protones al reducir la barrera de energía de activación.
- Las deficiencias de protones juegan un papel clave en los cambios de conductividad observados, allanando el camino para aplicaciones avanzadas de circuitos iónicos.
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