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ABAB complejo homoleptico bis ((phthalocyaninato) lutecio ((III): hacia el cubo octupolar real y la
Mehmet Menaf Ayhan1, Anu Singh, Catherine Hirel
1Laboratoire de Chimie de l'ENS de Lyon, CNRS UMR 5182, Université Lyon I, ENS de Lyon, 46 allée d'Italie, 69364 Lyon cedex 07, France.
Journal of the American Chemical Society
|February 8, 2012
Resumen
Los investigadores sintetizaron un nuevo complejo sándwich de lutecio ((III), logrando la hiperpolarizabilidad cuadrática más alta para una molécula octupolar. Este avance avanza en el diseño de materiales ópticos no lineales avanzados.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Química es la química.
- La óptica es la óptica.
Sus antecedentes:
- Las moléculas octupolares son cruciales para la ingeniería de materiales ópticos no lineales de segundo orden.
- El diseño de arquitecturas moleculares octupolares ideales, como un cubo con grupos alternados de donante / receptor, ha sido un desafío.
- Los diseños anteriores no han traducido la estructura cúbica ideal en moléculas reales.
Objetivo del estudio:
- Para sintetizar un lutecio ((III) complejo de dos pisos con ABAB-tipo phthalocyanine.
- Para crear una molécula que imite la simetría octupolar ideal para aplicaciones de materiales avanzados.
- Para medir la hiperpolarizabilidad molecular de primer orden (β) del complejo sintetizado.
Principales métodos:
- Síntesis de un nuevo complejo sándwich de lutecio ((III) con grupos alternantes de donantes y aceptadores.
- Determinación de la estructura cristalina para confirmar la arquitectura molecular.
- Medición de la hiperpolarizabilidad molecular de primer orden (β) utilizando la difusión armónica de la luz.
Principales resultados:
- Síntesis exitosa y determinación estructural del complejo de lutecio (III).
- El complejo exhibe una intensa absorción del infrarrojo cercano debido a una transición de intervalencia.
- La molécula logró la hiperpolarizabilidad cuadrática más alta reportada para una molécula octupolar (√<β(2)(HLS)> = 5750 × 10−30 esu).
Conclusiones:
- Este estudio presenta el primer paso hacia la realización de estructuras moleculares octupolares ideales.
- El complejo sintetizado de lutecio (III) demuestra un potencial significativo para aplicaciones ópticas no lineales.
- La hiperpolarizabilidad lograda resalta la promesa de este diseño molecular para futuros materiales.
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