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Solvatomecánico de flexión de la carga orgánica de la transferencia de co-cristal

Yanqiu Sun^1,2, Yilong Lei³, Huanli Dong¹

¹Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.

Journal of the American Chemical Society

|March 30, 2018

Resumen

Un nuevo cocristal solvatado exhibe transformaciones reversibles entre formas ternaras y binarias tras la absorción y desorción del disolvente. Este cambio estructural inducido por el disolvente resulta en una flexión mecánica macroscópica, un nuevo comportamiento solvatomecánico.

Área de la Ciencia:

Ciencias de los materiales
La cristalografía
Química supramolecular

Sus antecedentes:

Los cocristales ofrecen propiedades sintonizables a través del ensamblaje molecular.
Las transiciones de fase inducidas por solventes son cruciales para los materiales sensibles.

Objetivo del estudio:

Informar de un nuevo cocristal ternario solvado de perileno y TCNB con THF.
Para demostrar la transformación estructural inducida por el disolvente reversible y la flexión mecánica.

Principales métodos:

Síntesis y caracterización de los cocristales.
Estudios de sorción y desorción de vapor de disolvente.
Pruebas mecánicas in situ y análisis estructural.

Principales resultados:

Se sintetizó un nuevo cocristal ternario solvado (perileno-TCNB) · 2THF.
Transformación reversible entre los cocristales de perileno-TCNB ternario y binario en el intercambio de THF.
Flexión mecánica macroscópica observada tras la estimulación repetida con disolvente.

Conclusiones:

La flexión mecánica inducida por el disolvente es impulsada por cambios estructurales a nivel molecular.
Este estudio revela un nuevo comportamiento de flexión solvatomecánica en los cocristales.

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