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Una nanoesfera {Co32} soportada por p-tert-butylthiacalix[4]arene es una nanoesfera apoyada por

Yanfeng Bi¹, Xiu-Teng Wang, Wuping Liao

¹State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China.

Journal of the American Chemical Society

|August 1, 2009

Resumen

Los investigadores construyeron nuevos grupos de cobalto cubiertos de calixareno, formando unidades esféricas dispuestas en tres estructuras isoméricas distintas. Estas estructuras utilizan celosías cúbicas centradas en el cuerpo y embalaje cúbico más cercano para el ensamblaje.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Nanotecnología La nanotecnología es la nanotecnología.
Coordinación Química de la Coordinación

Sus antecedentes:

Los calixarenos son compuestos macrocíclicos versátiles con propiedades sintonizables.
Los grupos de cobalto ofrecen un potencial magnético y catalítico único.
El diseño de complejas arquitecturas supramoleculares sigue siendo un desafío.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos grupos de cobalto cubiertos de calixareno.
Investigar el autoensamblaje de estos grupos en estructuras ordenadas.
Explorar la diversidad estructural y los arreglos de empaque de los isómeros resultantes.

Principales métodos:

Síntesis supramolecular de racimos de Co32) cubiertos de calixareno.
Utilizando una jaula de sodalita Co(II) ((24) y un cubo de Co(III) ((8) encapsulado.
Difracción de rayos X y microscopía electrónica para el análisis estructural.

Principales resultados:

Se han construido con éxito racimos de Co32) cubiertos de calixareno.
Identificó tres estructuras isoméricas distintas basadas en la disposición de los grupos.
Se observaron dos isómeros que adoptan un empaquetado de celosía cúbica (bcc) centrado en el cuerpo.
Se caracteriza por un isómero formado por el embalaje cúbico más cercano (ccp) de unidades esféricas.

Conclusiones:

Los grupos de cobalto cubiertos de calixareno pueden autoensamblarse en complejas arquitecturas supramoleculares.
El embalaje de estas unidades esféricas está dictado por los principios de la ingeniería de cristales, incluyendo bcc y ccp.
Este trabajo proporciona una base para el diseño de nuevas jaulas de coordinación con propiedades estructurales sintonizables.

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