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Enlaces cruzados inducidos por aniones reversibles de calix bien definidos[4] copolímeros que contienen pirrolo

Eric S Silver¹, Brett M Rambo, Christopher W Bielawski

¹Department of Chemistry, 105 East 24th Street, Stop A5300, The University of Texas at Austin , Austin, Texas 78712, United States.

Journal of the American Chemical Society

|January 22, 2014

Resumen

Un nuevo copolímero derivado del metacrilato de pirrol calix[4] puede formar enlaces cruzados supramoleculares cuando se expone a dianiones específicos. Este material demuestra potencial para la diferenciación selectiva de aniones a través de la extracción líquido/líquido.

Área de la Ciencia:

Química de Polímeros La Química de Polímeros es la química de los polímeros.
Química supramolecular de las moléculas.
Ciencia de los materiales Ciencia de los materiales.

Sus antecedentes:

La polimerización por transferencia de cadena de adición/fragmentación reversible (RAFT, por sus siglas en inglés) es una técnica versátil para la síntesis controlada de polímeros.
Calix[4]pirroles son conocidos por su capacidad para unir aniones a través de enlaces de hidrógeno.
El desarrollo de materiales receptivos con propiedades sintonizables es crucial para aplicaciones avanzadas.

Objetivo del estudio:

Para sintetizar un copolímero derivado del metacrilato de pirrol calix[4] utilizando la polimerización RAFT.
Para investigar el comportamiento de reticulación supramolecular del copolímero en respuesta a las dianiones.
Para evaluar la utilidad del material en la diferenciación selectiva de aniones.

Principales métodos:

Síntesis controlada de un copolímero derivado del metacrilato de pirrol calix[4] a través de la polimerización RAFT.
Caracterización de la respuesta del copolímero a varias especies dianiónicas (por ejemplo, pirofosfato, tereftalato).
Evaluación de cambios en las propiedades viscoelásticas en soluciones y estados sólidos.
Evaluación de la diferenciación selectiva de mono- y bis-aniones utilizando la extracción líquido/líquido.

Principales resultados:

El copolímero sintetizado exhibe enlaces cruzados supramoleculares reversibles tras la interacción con dianiones específicos.
Este enlace cruzado altera significativamente las propiedades viscoelásticas del copolímero.
El material diferencia con éxito entre mono- y bis-aniones durante los procesos de extracción líquido/líquido.

Conclusiones:

El copolímero derivado del metacrilato de pirrol calix[4] es un material sensible que se somete a enlaces cruzados supramoleculares inducidos por aniones.
Los cambios observados en la viscoelasticidad resaltan el potencial para el diseño inteligente de materiales.
El copolímero se muestra prometedor como un agente selectivo para la separación de aniones y aplicaciones de detección.

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