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Un nuevo sistema de coordinación de manganeso sintonizable basado en una unidad "espaciadora" flexible: efectos de

F M Tabellion¹, S R Seidel, A M Arif

¹Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, USA.

Journal of the American Chemical Society

|November 29, 2001

Resumen

Los polímeros de coordinación flexibles se forman utilizando un complejo de manganeso (II) y un enlace flexible. Los huéspedes orgánicos controlan la formación de polímeros helicoidales, macrociclos diméricos o polímeros en forma de cuña, revelando información sobre las interacciones huésped-huésped.

Área de la Ciencia:

Coordinación Química de la Coordinación
Ingeniería de Cristal Ingeniería de Cristal.
Química supramolecular de las moléculas.

Sus antecedentes:

El bis (hexafluoroacetilacetonato) manganeso (II) trihidrato actúa como una unidad angular.
La 4,4'-trimetilenedipiridina sirve como una unidad de enlace flexible.
Los polímeros de coordinación pueden adoptar varias arquitecturas como hélices, macrociclos y cadenas lineales.

Objetivo del estudio:

Para investigar la formación de diferentes especies de coordinación del estado sólido.
Para explorar la influencia de los huéspedes orgánicos en la estructura cristalina.
Comprender el papel de los enlaces flexibles en la ingeniería de cristales.

Principales métodos:

Cristalización del complejo de manganeso (II) con 4,4'-trimetilendipiridina en presencia de varios huéspedes orgánicos.
Análisis estructural de las especies de coordinación de estado sólido resultantes.
Investigación de las interacciones anfitrión-invitado y huésped-invitado.

Principales resultados:

Los macrociclos diméricos se formaron predominantemente con la mayoría de los huéspedes orgánicos.
Un polímero sindiotáctico en forma de cuña formado en presencia de 1,3-difenilpropano.
Se destacó el papel del enlace flexible para dirigir la estructura y permitir el estudio de las interacciones más débiles.

Conclusiones:

La elección del huésped orgánico es crucial para controlar el autoensamblaje de los polímeros de coordinación.
Los enlaces flexibles ofrecen capacidad de ajuste en la ingeniería del cristal, permitiendo diversas estructuras.
El análisis de las interacciones más débiles proporciona una comprensión más profunda de la química huésped-huésped en estos sistemas.

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