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Transformación reversible entre anillos y bobinas en un autoensamblaje dinámico de enlace de hidrógeno
Shiki Yagai1, Shun Kubota, Hikaru Saito
1Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan. yagai@faculty.chiba-u.jp
Journal of the American Chemical Society
|March 28, 2009
Resumen
Las moléculas sintéticas se autoensamblan en nanoanillos y luego se transforman en nanoestructuras helicoidales, imitando la autoorganización biológica. Este avance ofrece nuevas posibilidades para la creación de nanomateriales avanzados.
Área de la Ciencia:
- Se trata de una química supramolecular.
- Nanotecnología La nanotecnología es la nanotecnología.
- Ciencia de los materiales ciencia de los materiales.
Sus antecedentes:
- Las proteínas como la proteína de la capa del virus del mosaico del tabaco exhiben una autoorganización dinámica en nanoestructuras.
- La transformación de anillos en bobinas con moléculas sintéticas ha sido un desafío significativo.
- Los bloques de construcción sintéticos existentes carecen de la capacidad de imitar vías complejas de autoensamblaje biológico.
Objetivo del estudio:
- Desarrollar bloques de construcción moleculares sintéticos capaces de auto-organización dinámica.
- Para lograr la transformación de nanoanillos en nanoestructuras helicoidales utilizando componentes sintéticos.
- Para imitar la transformación de anillo a bobina observada en los sistemas biológicos.
Principales métodos:
- Sintetizando moléculas de oligo ((p-fenilenovileno) funcionalizadas con ácido barbitúrico y colas alifáticas.
- Utilizando las interacciones de enlace de hidrógeno y apilamiento de pi para el autoensamblaje en disolventes alifáticos.
- Investigando las transformaciones estructurales dependientes de la concentración de los nanorings a las nanoestructuras tipo varilla.
Principales resultados:
- Formado con éxito nanorings estables a través de la auto-organización impulsada por la unión de hidrógeno y apilamiento de pi.
- Se observó una transformación dependiente de la concentración de los nanorings en nanoestructuras similares a varillas.
- Se propone que las estructuras en forma de varilla surjan de fibras cuasidimensionales en espiral en espiral.
Conclusiones:
- Demostró el primer sistema sintético para lograr una transformación de anillo a bobina en nanoestructuras autoensambladas.
- Los derivados de oligo ((p-fenileno vinileno) sirven como bloques de construcción versátiles para la formación dinámica de nanomateriales.
- Este trabajo proporciona una nueva plataforma para diseñar nanomateriales receptivos y adaptables inspirados en la naturaleza.
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