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Complejos poliméricos de plata ((I) con ligandos de difosfina: autoensamblaje de una estructura de red de láminas
Marie-Claude Brandys1, Richard J Puddephatt
1Contribution from the Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7.
Journal of the American Chemical Society
|April 11, 2002
Resumen
Los investigadores sintetizaron nuevos complejos poliméricos de plata ((I) -difosfina. Estos complejos forman polímeros lineales únicos o estructuras de láminas arrugadas, imitando materiales naturales en capas como las arcillas.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
Sus antecedentes:
- Los complejos de plata (I) con ligandos de difosfina son conocidos por sus diversos motivos estructurales.
- Comprender la influencia de la flexibilidad del ligando y los counteriones en la arquitectura del polímero de coordinación es crucial.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos poliméricos de plata (((I) -difosfina.
- Investigar las relaciones estructura-propiedad influenciadas por el diseño del ligando y las condiciones de reacción.
- Explorar la formación de arquitecturas poliméricas únicas, incluidas las estructuras en capas.
Principales métodos:
- Síntesis de los complejos de plata (I) -difosfina.
- Caracterización estructural mediante difracción de rayos X. Caracterización estructural mediante difracción de rayos X.
- Análisis de los modos de coordinación y las interacciones de puente.
Principales resultados:
- Formación de polímeros de coordinación lineal con difosfinas rígidas y aniones de coordinación débil, con puentes de difosfina y aniones.
- Observación de una estructura única de chapa arrugada con difosfinas flexibles, compuesta por anillos fundidos de 54 miembros.
- La estructura de la lámina sirve como un análogo de polímero de coordinación a los materiales en capas como las micas y las arcillas.
Conclusiones:
- La flexibilidad del grupo espaciador del ligando de difosfina dicta la arquitectura final del polímero (lineal frente a la hoja).
- Las estructuras de chapa sintetizadas representan una nueva clase de polímeros de coordinación con aplicaciones potenciales en la ciencia de los materiales.
- Las estructuras poliméricas de cadena y chapa pueden derivarse conceptualmente de la polimerización de apertura de anillos de precursores cíclicos.
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