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Síntesis directa de polienos solubles y funcionalizados finales y copolímeros de bloque de poliacetileno
Oren A Scherman1, Isaac M Rutenberg, Robert H Grubbs
1Arnold and Mabel Beckman Laboratories for Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|July 10, 2003
Resumen
La polimerización de la metátesis de apertura de anillo del ciclooctatetraeno (COT) con agentes de transferencia de cadena (CTA) produce polienos solubles y copolímeros de bloque de poliacetileno. Este método permite la síntesis controlada de polímeros funcionalizados con numerosos enlaces dobles.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Síntesis orgánica La síntesis orgánica.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- La polimerización por metástasis de apertura de anillo (ROMP) es una técnica poderosa para la síntesis de polímeros.
- El ciclooctatetraeno (COT) es un monómero cíclico de olefinas adecuado para el ROMP.
- El control de la arquitectura y la funcionalidad del polímero es crucial para los materiales avanzados.
Objetivo del estudio:
- Para sintetizar polienos solubles y poliacetileno bloquear copolímeros utilizando ROMP de COT.
- Investigar el efecto de los agentes de transferencia de pequeñas moléculas y cadenas poliméricas (CTA) en la estructura del polímero.
- Para caracterizar los polímeros resultantes utilizando varias técnicas analíticas.
Principales métodos:
- La polimerización por metástasis de apertura de anillo (ROMP) del 1,3,5,7-ciclooctatetraeno (COT).
- Utilizó catalizadores de metátesis de olefina de rutenio y agentes de transferencia de cadena (CTA).
- Caracterización a través de 1H RMN, UV / vis, FT-IR, MALDI-TOF MS, y AFM.
Principales resultados:
- Formación de polienos solubles a partir de COT ROMP en presencia de CTA.
- Síntesis de polienos telecélicos solubles con hasta 20 enlaces dobles utilizando pequeñas moléculas CTA.
- Producción de copolímeros de bloques de poliacetileno utilizando CTA poliméricos con terminaciones de olefinas.
Conclusiones:
- ROMP de COT con CTAs proporciona una ruta versátil para los polienos solubles y bloquear los copolímeros.
- La elección del CTA dicta la arquitectura del polímero, lo que permite la formación de telecélico o bloquear el copolímero.
- Los polímeros sintetizados poseen potencial para diversas aplicaciones en la ciencia de los materiales.
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