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Polímeros de coordinación de cianurourouro altamente birefringentes: el efecto de los enlaces C-X polarizables (X =
Michael J Katz1, Daniel B Leznoff
1Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada V5A 1S6.
Journal of the American Chemical Society
|December 4, 2009
Resumen
Los nuevos polímeros de coordinación que incorporan enlaces halógenos exhiben una alta birefringencia, ofreciendo una estrategia de diseño para materiales ópticos avanzados. Estos materiales demuestran propiedades ópticas mejoradas en comparación con compuestos similares sin sustitutos halógenos.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- La cristalografía es una técnica de cristalografía.
Sus antecedentes:
- Los polímeros de coordinación son materiales cristalinos con diversas aplicaciones.
- La birefringencia en los materiales es crucial para las tecnologías ópticas.
- Los ligandos basados en terpiridina son comunes en la química de la coordinación.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos polímeros de coordinación.
- Para medir la birefringencia de estos nuevos materiales.
- Investigar la relación entre la estructura y las propiedades ópticas.
Principales métodos:
- Síntesis de cuatro nuevos polímeros de coordinación: Mn ((Clterpy) [Au ((CN) ((2)) ], Mn ((Brterpy) [Au ((CN) ((2)) ], Pb ((Clterpy) [Au ((CN) ((2)) ], y Pb ((Brterpy) mu-OH ((2))
- Caracterización estructural mediante difracción de rayos X. Caracterización estructural mediante difracción de rayos X.
- Medición de los valores de birefringencia a lo largo de la dirección de crecimiento del cristal primario.
Principales resultados:
- Los polímeros sintetizados exhiben estructuras de cadena unidimensional.
- Los valores de birefringencia medidos fueron 0,37819), 0,503, 0,382 y 0,263.
- La alta birefringencia se correlaciona con la alineación de las unidades de terpiridina y la posición de los enlaces carbono-halógeno.
Conclusiones:
- Los enlaces de carbono-halógeno polarizables son elementos de diseño efectivos para mejorar la birefringencia en los polímeros de coordinación.
- Los polímeros estudiados muestran una birefringencia significativa o comparable con los sistemas relacionados que carecen de sustitutos de halógenos.
- Estos hallazgos proporcionan información sobre el diseño de materiales con propiedades ópticas personalizadas.
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