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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
Published on: August 2, 2012
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Transición de la mesofase nemática a la columnar por polimerización supramolecular in situ
Keiichi Yano1, Yoshimitsu Itoh2, Fumito Araoka3
1Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Science (New York, N.Y.)
|January 12, 2019
Resumen
Los investigadores lograron un coensamblaje sin precedentes de moléculas en forma de disco y vara, creando un nuevo material cristalino líquido con una estructura columnar de núcleo de cáscara que responde a campos eléctricos y puede personalizarse optoeléctricamente.
Área de la Ciencia:
- Química supramolecular
- Ciencias de los materiales
- Cristales líquidos
Sus antecedentes:
- Las moléculas en forma de disco y barra suelen exhibir comportamientos de coensamblaje incompatibles.
- La incompatibilidad es a menudo más pronunciada en las fases condensadas, lo que lleva a la exclusión molecular.
- Lograr el coensamblaje ordenado de moléculas de diferentes formas presenta un desafío significativo.
Objetivo del estudio:
- Investigar el coensamblaje de monómeros quirales en forma de disco con moléculas en forma de varilla en una fase de cristal líquido nemático.
- Para explorar la formación de nuevas mesofasas y arquitecturas moleculares.
- Desarrollar materiales cristalinos líquidos receptivos y personalizables.
Principales métodos:
- La polimerización supramolecular de monómeros quirales en forma de disco dentro de un huésped de cristal líquido nemático.
- Caracterización de la mesofase resultante y su geometría estructural.
- Investigación de la respuesta del material a los campos eléctricos aplicados.
- Integración modular de unidades en forma de varilla fotoisomerizables.
Principales resultados:
- Formación de una mesofase columnar de núcleo-capa a través de una transición de orden creciente.
- Inducción rápida de ordenamiento columnar unidireccional mediante la aplicación de un campo eléctrico.
- Demostración de la capacidad de respuesta optoeléctrica mediante la personalización modular.
- Integración cooperativa exitosa de múltiples funciones en arquitecturas dinámicas.
Conclusiones:
- Superar la incompatibilidad de la forma molecular en el coensamblaje se puede lograr a través de la polimerización supramolecular en cristales líquidos.
- El material cristalino líquido columnar desarrollado muestra propiedades optoeléctricas sintonizables.
- El diseño modular permite la creación de materiales dinámicos sofisticados y multifuncionales.
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