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Preparación de poli (diododiacetileno), un polímero conjugado ordenado de carbono y yodo
Aiwu Sun1, Joseph W Lauher, Nancy S Goroff
1Department of Chemistry, State University of New York, Stony Brook, NY 11794-3400, USA.
Science (New York, N.Y.)
|May 20, 2006
Resumen
Los investigadores crearon un nuevo polímero, el polidiododiacetileno (PIDA), utilizando un método de co-cristal. Esta cadena de polímero casi sin adornos presenta sustitutos mínimos de yodo, lo que hace avanzar el diseño de polímeros conjugados.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Química orgánica es la química orgánica.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los polímeros orgánicos conjugados a menudo requieren grandes sustitutos para la estabilidad y la polimerización ordenada.
- Los polidiacetilenos utilizan sustituyentes para controlar el espaciamiento de los monómeros durante la polimerización topoquímica.
Objetivo del estudio:
- Para sintetizar un nuevo polímero conjugado, el polidiodiacetileno (PIDA), con grupos laterales mínimos.
- Explorar el uso de andamios de co-cristal para la polimerización topoquímica controlada.
Principales métodos:
- Co-cristalización del monómero de diiodobutadiine con las oxalamidas de bis ((nitrilo).
- La polimerización topoquímica dentro de la estructura cocristalina.
- Caracterización estructural utilizando difracción de rayos X de un solo cristal, espectroscopia de absorción UV-Vis y microscopía electrónica de barrido.
Principales resultados:
- Se preparó con éxito polidiodiacetileno (PIDA) a través de la polimerización topoquímica espontánea.
- El monómero PIDA, diiodobutadiyne, formó co-cristales con oxalamidas, guiados por enlaces de hidrógeno e interacciones ácido-base de Lewis.
- La caracterización confirmó la estructura de los cristales de color azul oscuro y cobre.
Conclusiones:
- El andamio de co-cristal permite la síntesis de polímeros conjugados con un mínimo de sustituyentes.
- Este enfoque ofrece una nueva ruta para diseñar y crear polímeros orgánicos funcionales.
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