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Coronilla hexagonal metalo-supramolecular con cuatro estados intercambiables basado en un ligando tridentado sensible

Pingru Su^1,2, Biaowen Wei^1,2, Chenxing Guo^1,2

¹College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China.

Journal of the American Chemical Society

|January 25, 2023

Resumen

Los investigadores desarrollaron coronas hexagonales metalo-supramoleculares sensibles al pH utilizando un nuevo ligando. Estas estructuras cambian de forma reversible entre cuatro estados, lo que permite propiedades físicas ajustables para materiales avanzados.

Área de la Ciencia:

Química supramolecular
Química de coordinación
Ciencias de los materiales

Sus antecedentes:

Los sistemas biológicos exhiben un cambio de estado reversible en biomacromoléculas como las proteínas hemo.
Los sistemas supramoleculares artificiales luchan con la interconversión multiestado reversible.
La química metalo-supramolecular tiene como objetivo imitar la complejidad y la funcionalidad biológica.

Objetivo del estudio:

Construir sistemas metalo-supramoleculares capaces de una interconversión reversible entre varios estados.
Diseñar y sintetizar bloques de construcción sensibles al pH para su autoensamblaje.
Para explorar las propiedades físicas sintonizables de estas construcciones autoensambladas.

Principales métodos:

Autoensamblaje impulsado por la coordinación utilizando un ligando tridentado sensible al pH (H2DAP).
Incorporación de iones metálicos (Fe (II), Co (II), Ni (II)) en bloques de construcción multitópicos.
Investigación de la interconversión de estados desencadenada por estímulos de pH y redox.

Principales resultados:

Construido con éxito gigantescas coronas hexagonales metalo-supramolecular.
Se ha demostrado la interconversión reversible entre cuatro estados distintos en una corona interconectada.
Ajuste fino observado de las propiedades físicas, incluida la carga de la columna vertebral y la valencia de iones metálicos.
Facilitar el ensamblaje capa por capa de las supramoleculas metálicas con capacidad de intercambio de carga en sustratos.

Conclusiones:

Desarrolló un nuevo ligando sensible al pH para crear arquitecturas metalo-supramoleculares complejas.
Se logró una conmutación multiestado eficiente y reversible en coronas autoensambladas.
Destacó el potencial de los materiales supramoleculares con capacidad de conmutación de carga en aplicaciones avanzadas.

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