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Transformaciones de supramolecula a supramolecula de polígonos autoensamblados impulsados por la coordinación
Liang Zhao1, Brian H Northrop, Peter J Stang
1Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, USA. liangz@chem.utah.edu
Journal of the American Chemical Society
|August 16, 2008
Resumen
Los investigadores lograron nuevas transformaciones supramoleculares, convirtiendo polígonos de platino autoensamblados en diferentes estructuras. Esta conversión de polígono metal-orgánico ofrece un método novedoso para crear y modificar arquitecturas moleculares complejas.
Área de la Ciencia:
- Química supramolecular de las moléculas.
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los polígonos metálico-orgánicos autoensamblados son estructuras intrincadas con aplicaciones potenciales.
- El control de las transformaciones supramoleculares es crucial para el diseño de materiales moleculares avanzados.
Objetivo del estudio:
- Para demostrar las transformaciones supramoleculares controlables de los polígonos metal-orgánicos de platino (II) -piridil.
- Para explorar la conversión de una arquitectura poligonal en otra utilizando reacciones químicas específicas.
Principales métodos:
- Reacción de un hexágono [6+6] preformado o de una mezcla triangular-cuadrada de polígonos Pt(II) -piridil con carbonio de cobalto.
- Utilizando la fracción de acetileno de un ligando donante de dipiridil para la transformación.
- Caracterización mediante espectroscopia de resonancia magnética nuclear (1H y 31P RMN) de protones y fósforo-31.
- Identificación de las especies transformadas a través de la espectrometría de masas de ionización por electrospray (ESI).
Principales resultados:
- Un hexágono [6 + 6] se transformó con éxito en dos hexágonos [3 + 3].
- Una mezcla de polígonos triangulares y cuadrados se convirtió en [2 + 2] romboides.
- La espectroscopia de RMN confirmó el proceso de transformación y los rendimientos cuantificados.
- La espectrometría de masas de ESI verificó las estructuras de los polígonos recién formados.
Conclusiones:
- Se lograron nuevas transformaciones de supramolecula a supramolecula para polígonos Pt ((II) -piridil.
- Demostró la capacidad de convertir de manera controlable una estructura de polígono autoensamblada en arquitecturas alternativas.
- Estableció una vía viable tanto para la construcción como para la posterior transformación de polígonos complejos autoensamblados.
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