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Un método versátil para la preparación de materiales supramoleculares ferroeléctricos a través de la funcionalización

Miguel García-Iglesias¹, Bas F M de Waal¹, Andrey V Gorbunov²

¹Institute of Complex Molecular Systems, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

Journal of the American Chemical Society

|April 28, 2016

Resumen

Los investigadores desarrollaron un nuevo método para crear materiales ferroeléctricos mediante la unión de oligómeros de fluoruro de vinilideno (OVDF) a varios núcleos moleculares. Esto permite la síntesis de nuevos materiales funcionales con propiedades combinadas como la ferroelectricidad y la conductividad.

Área de la Ciencia:

Ciencias de los materiales
Química de los polímeros
Productos electrónicos orgánicos

Sus antecedentes:

Los materiales ferroeléctricos son cruciales para los dispositivos electrónicos avanzados.
El desarrollo de nuevas rutas sintéticas para polímeros ferroeléctricos funcionales es un desafío continuo.
Los oligómeros de fluoruro de vinilideno (OVDF) ofrecen un potencial para aplicaciones ferroeléctricas.

Objetivo del estudio:

Establecer un método sintético versátil para la funcionalización final del OVDF.
Para crear nuevas moléculas en forma de disco funcionalizadas con OVDF.
Investigar las propiedades ferroeléctricas de los materiales resultantes.

Principales métodos:

Reacción radical entre las olefinas terminales y el i-OVDF para la funcionalización final del OVDF.
Síntesis de núcleos en forma de disco: benceno-1,3,5-tricarboxamidas (BTA), perilenos bisimidas (PBI) y ftalocianinas (Pc).
Caracterización mediante RMN, SEC, DSC, POM y AFM para evaluar la formación, pureza, conformación y morfología.
Medición de la histeresis ferroeléctrica y de la polarización remanente.

Principales resultados:

Funcionalización final exitosa de OVDF con un amplio alcance de sustrato y altas conversiones.
Preparación de núcleos BTA, PBI y Pc funcionalizados con 3-8 oligómeros OVDF ferroeléctricos.
Los materiales PBI-OVDF y Pc-OVDF presentan una histeresis ferroeléctrica.
Pc-OVDF logró una alta polarización de los restos (Pr ≈ 37 mC/m2).

Conclusiones:

Se demuestra una nueva estrategia sintética para la preparación de materiales ferroeléctricos mediante la unión de oligómeros OVDF a moléculas pequeñas.
Este enfoque permite la creación de materiales multifuncionales que combinan la ferroelectricidad con la conductividad o las propiedades de recolección de luz.
El estudio pone de relieve el potencial para diseñar materiales funcionales avanzados con propiedades a medida.

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