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Preparación sin metales de polidiciclopentadieno lineal y entrelazado

Adam E Goetz¹, Andrew J Boydston¹

¹Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.

Journal of the American Chemical Society

|June 9, 2015

Resumen

Este estudio introduce la polimerización de la metátesis de apertura de anillo libre de metales (ROMP) utilizando catalizadores orgánicos fotoredox. Este método permite la síntesis de polímeros lineales y reticulados sin contaminación por metales residuales, ofreciendo una alternativa más ecológica para la producción de polímeros.

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:

Los iniciadores tradicionales basados en metales en la polimerización de la metátesis de apertura de anillos (ROMP) pueden conducir a la contaminación residual de metales en los polímeros.
La catálisis orgánica fotorredóxica ofrece una alternativa libre de metales para iniciar reacciones de polimerización.

Objetivo del estudio:

Para explorar el ROMP libre de metales utilizando mediadores orgánicos de fotorreducción.
Para sintetizar poli (diciclopentadieno) lineal (poliDCPD) y los copolímeros.
Desarrollar un método completamente libre de metales para la preparación de poliDCPD reticulado.

Principales métodos:

Se utiliza el endo-diciclopentadieno (DCPD) como monómero de la ROMP.
Se empleó catálisis orgánica fotorredóxica para el inicio de la polimerización.
Química aplicada del tiol-eno para el posterior enlace cruzado de poliDCPD. lineal.

Principales resultados:

Sintetizó con éxito poliDCPD lineal y copolímeros con norboreneno a través de ROMP libre de metales.
Se logró una preparación completamente libre de metales de poliDCPD reticulado a través de la química del tiol-ene.
Obtuvo conocimientos mecanicistas sobre el ROMP libre de metales a través de la variación monomérica.

Conclusiones:

El ROMP sin metales que utiliza mediadores orgánicos de fotorreducción es una ruta viable para la síntesis de polímeros.
Este enfoque evita la contaminación por metales residuales, crucial para aplicaciones específicas.
Se identificaron nuevos monómeros adecuados para el ROMP libre de metales, ampliando su alcance.

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