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Polímeros ROMP que contienen aminoácidos con una columna vertebral estereorregular
Jae Chul Lee1, Kathlyn A Parker, Nicole S Sampson
1Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA.
Journal of the American Chemical Society
|April 6, 2006
Resumen
La polimerización de apertura de anillo catalizada por rutenio produce polímeros altamente ordenados con una columna vertebral de polibutadieno controlada. Estos polímeros exhiben una baja polidispersidad, lo que indica un proceso de polimerización vivo adecuado para aplicaciones avanzadas.
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 apertura de anillos (ROMP) es un método versátil para la síntesis de polímeros.
- Lograr una alta estereoregularidad y arquitecturas de polímeros controlados sigue siendo un desafío en ROMP.
- Las columnas vertebrales de polibutadieno funcionalizadas son deseables para diversas aplicaciones de materiales.
Objetivo del estudio:
- Para sintetizar polímeros ordenados de la cabeza a la cola, invariantes traslacionalmente, utilizando ROMP.
- Para investigar el resultado estereocímico y las características de vida de la polimerización.
- Explorar el potencial de estos polímeros en aplicaciones que requieren cadenas estereorreguladas y funcionalizadas.
Principales métodos:
- La polimerización de apertura de anillo catalizada por rutenio (ROMP) del 1-ciclobutenocarbonilo glicina metil éster.
- Caracterización de productos poliméricos utilizando técnicas para determinar la estructura, la estereoquímica y la distribución del peso molecular.
- Análisis de la geometría de las olefinas y los estereocentros dentro de la columna vertebral del polímero.
Principales resultados:
- Sintetizó con éxito polímeros ordenados de la cabeza a la cola, traduccionalmente invariantes.
- La columna vertebral de polibutadieno contenía exclusivamente olefinas E-trisubstituidas y carecía de estereocentros.
- Los polímeros exhibieron bajas polidispersidades (1.21.6), indicativas de un proceso de polimerización vivo.
- Los polímeros derivados de 1-ciclobutenocarboxamida mostraron ser prometedores para la funcionalización.
Conclusiones:
- El ROMP catalizado por rutenio proporciona un control preciso sobre la estructura del polímero y la estereoquímica.
- Los polímeros sintetizados son altamente ordenados y poseen una columna vertebral de polibutadieno bien definida.
- Estos polímeros son adecuados para aplicaciones que exigen cadenas estereorregulares con ligandos polares.
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