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Disolución y fase de cristales líquidos del nitruro de carbono polimérico 2D

Zhixin Zhou¹, Jianhai Wang, Jiachao Yu

¹Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Medical School, Southeast University , Nanjing 211189, China.

Journal of the American Chemical Society

|January 31, 2015

Resumen

El nitruro de carbono polimérico de fase grafito (GPPCN) ahora es soluble en ácido sulfúrico, lo que permite la RMN en estado líquido y revela las fases de cristal líquido. Este avance abre nuevas aplicaciones para este material libre de metales.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química Química es la química.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

El nitruro de carbono polimérico de fase grafito (GPPCN) es un material libre de metales prometedor para la optoelectrónica y la catálisis.
La insolubilidad del GPPCN ha obstaculizado significativamente sus aplicaciones prácticas y el análisis estructural.

Objetivo del estudio:

Desarrollar un método para disolver GPPCN para superar su insolubilidad.
Para permitir técnicas avanzadas de caracterización y explorar nuevas fases de materiales.
Para allanar el camino para nuevas aplicaciones basadas en GPPCN.

Principales métodos:

Disolviendo GPPCN en ácido sulfúrico concentrado a través de la protonación sinérgica y la intercalación.
Alcanzar altas concentraciones de soluciones de GPPCN (hasta 300 mg/mL).
Obtención de los primeros espectros de resonancia magnética nuclear (RMN) en estado líquido de GPPCN.

Principales resultados:

GPPCN se disolvió con éxito en ácido sulfúrico concentrado, logrando concentraciones sin precedentes.
Se obtuvieron por primera vez espectros de RMN en estado líquido de GPPCN, facilitando el análisis estructural detallado.
Se observó una fase de cristal líquido en la familia de nitruro de carbono en altas concentraciones.

Conclusiones:

El ácido sulfúrico concentrado es el primer disolvente factible para GPPCN, superando su insolubilidad.
La capacidad de disolver GPPCN y formar fases de cristal líquido abre caminos para los nanocompuestos basados en GPPCN y materiales macroscópicos ordenados.
Este avance amplía significativamente las aplicaciones potenciales de GPPCN en varios campos.

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