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Vitrificación y cristalización en frío de un compuesto unidimensional parecido a la perovskita habilitado por enlaces
Zi-Yi Du1,2, Miao Xie2, Wei-Yu Hu2
1School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China.
Journal of the American Chemical Society
|October 2, 2025
Resumen
Los investigadores lograron la formación de vidrio en un polímero de coordinación 1D utilizando enlaces dinámicos. Este avance permite la cristalización en frío, ofreciendo nuevas estrategias para diseñar nuevos materiales híbridos formadores de vidrio.
Área de la Ciencia:
- Ciencias de los materiales
- Química del estado sólido
- La cristalografía
Sus antecedentes:
- La formación y transformación del vidrio son desafíos clave en la ciencia de los materiales.
- La vitrificación es típicamente inalcanzable en compuestos similares a la perovskita 1D.
- La comprensión de las transiciones de fase en materiales híbridos orgánicos e inorgánicos es crucial.
Objetivo del estudio:
- Informar sobre el primer ejemplo de vitrificación y cristalización en frío en un polímero de coordinación tipo perovskita 1D.
- Para aclarar el mecanismo de formación de vidrio y cristalización en frío en estos materiales.
- Explorar nuevas estrategias para el diseño de materiales híbridos formadores de vidrio.
Principales métodos:
- Técnica de extinción de fusión para inducir la vitrificación.
- Análisis estructurales y espectroscópicos completos.
- Simulaciones de dinámica molecular y espectroscopia de resonancia magnética nuclear (RMN) en estado sólido.
- Estudios de calorimetría por barrido diferencial (DSC).
Principales resultados:
- Se obtiene la vitrificación en un polímero de coordinación similar a la perovskita 1D, (4-metilmorfolinio) [Cd(SCN) 3], a través de la extinción por fusión.
- Se identificó la reorganización reversible del enlace de coordinación y la libertad de configuración de la catión como impulsores de la transición vidrio-cristal.
- Se ha demostrado la cristalización en frío a través de la nucleación instantánea y el crecimiento en 1D, impulsado por la reorganización catiónica.
Conclusiones:
- Se estableció un nuevo mecanismo de vitrificación basado en enlaces de coordinación dinámicos en materiales híbridos 1D.
- Proporcionó información a nivel molecular sobre las transiciones de fase en compuestos similares a la perovskita de baja dimensión.
- Abrió nuevas vías para el desarrollo de materiales híbridos avanzados para la formación de vidrio.
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