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Montaje versátil de calizas y jaulas de resorcinareno coordinadas a través de afinación de enlaces auxiliares

Wen-Yuan Pei¹, Guohai Xu^2,3,4, Jin Yang¹

¹Key Lab for Polyoxometalate Science, Department of Chemistry, Northeast Normal University , Changchun 130024, China.

Journal of the American Chemical Society

|May 24, 2017

Resumen

Los investigadores diseñaron sólidos porosos coordinados con metales flexibles utilizando cavitandos y jaulas de calix[4]resorcinareno. Estos materiales adaptables muestran cambios estructurales reversibles, ofreciendo potencial para aplicaciones avanzadas en el reconocimiento y almacenamiento molecular.

Área de la Ciencia:

Química supramolecular
Ciencias de los materiales
Cristalografía Química

Sus antecedentes:

Las cavitandas de calix[4]resorcinareno son andamios moleculares versátiles.
El diseño de materiales porosos con propiedades ajustables sigue siendo un desafío.
La coordinación del metal ofrece una ruta para construir arquitecturas supramoleculares complejas.

Objetivo del estudio:

Desarrollar una estrategia de diseño para cavitandos y jaulas de calix[4]resorcinareno coordinados por metales.
Investigar las propiedades estructurales y porosas de estos nuevos materiales.
Para aclarar el mecanismo de las transformaciones estructurales receptivas al huésped.

Principales métodos:

Síntesis y caracterización de cavitandos y jaulas funcionalizados.
Difracción de rayos X para el análisis estructural.
Mediciones de adsorción de gas para determinar la porosidad.
Cálculos de la teoría funcional de la densidad (DFT) para estudios mecanicistas.

Principales resultados:

Se ensamblaron con éxito tres cavitandas coordinadas en metal (1a-1c) y tres jaulas de coordinación (2a-2c).
Los cristales exhibieron porosidades accesibles significativas.
Los cavitandes 1a-1c demostraron una notable flexibilidad estructural, cambiando de forma reversible entre los estados de poro abierto y estrecho.

Conclusiones:

Una nueva estrategia de diseño permite la construcción de materiales porosos sintonizables a base de calix[4] y resorcinareno.
Estos materiales exhiben una dinámica estructural que responde a los invitados.
Los hallazgos proporcionan información sobre el diseño de sólidos porosos flexibles para aplicaciones potenciales.

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