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Poly(o‐xylylene)s via Cobalt‐Catalyzed Reductive Polymerization†

Poly(o‐xylylene)s via Cobalt‐Catalyzed Reductive Polymerization† Poly(p‐xylylene)s (PPX) have found wide applications in various fields owing to their chemical robustness, low gas permeability and excellent dielectric properties. As a structural isomer of PPX, poly(o‐xylylene)s (POX), possessing a distinct main‐chain connectivity, are excellent candidates to pursue high‐performance materials; however, the investigation of POX is hampered by the lack of efficient synthetic methods. Herein, we report a straightforward way to access POXs through a cobalt‐catalyzed reductive polymerization. This method not only allows the direct preparation of electronically unmodified POXs, but also enables the copolymerization between o‐xylylene dibromides bearing different aryl or benzylic substituents. The glass transition temperatures of the copolymers can be finely tuned by varying the ratio between comonomers. The obtained POXs are solvent processible and amenable for thin‐film fabrication. As aryl bromide moiety remains untouched during the polymerization, post‐polymerization functionalization is easily achieved through Suzuki‐Miyaura coupling reaction. The chemistry also enables the copolymerization of xylylene dibromide regioisomers, thereby leading to diversified non‐conjugated polymers, whose backbones are rich in arylene moieties. Moreover, the use of the polymerization strategy to synthesize structurally novel porous polymers is demonstrated. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Poly(o‐xylylene)s via Cobalt‐Catalyzed Reductive Polymerization†

Chinese Journal of Chemistry , Volume 38 (9) – Sep 1, 2020

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References (38)

Publisher
Wiley
Copyright
© 2020 SIOC, CAS, Shanghai & WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1001-604X
eISSN
1614-7065
DOI
10.1002/cjoc.202000084
Publisher site
See Article on Publisher Site

Abstract

Poly(p‐xylylene)s (PPX) have found wide applications in various fields owing to their chemical robustness, low gas permeability and excellent dielectric properties. As a structural isomer of PPX, poly(o‐xylylene)s (POX), possessing a distinct main‐chain connectivity, are excellent candidates to pursue high‐performance materials; however, the investigation of POX is hampered by the lack of efficient synthetic methods. Herein, we report a straightforward way to access POXs through a cobalt‐catalyzed reductive polymerization. This method not only allows the direct preparation of electronically unmodified POXs, but also enables the copolymerization between o‐xylylene dibromides bearing different aryl or benzylic substituents. The glass transition temperatures of the copolymers can be finely tuned by varying the ratio between comonomers. The obtained POXs are solvent processible and amenable for thin‐film fabrication. As aryl bromide moiety remains untouched during the polymerization, post‐polymerization functionalization is easily achieved through Suzuki‐Miyaura coupling reaction. The chemistry also enables the copolymerization of xylylene dibromide regioisomers, thereby leading to diversified non‐conjugated polymers, whose backbones are rich in arylene moieties. Moreover, the use of the polymerization strategy to synthesize structurally novel porous polymers is demonstrated.

Journal

Chinese Journal of ChemistryWiley

Published: Sep 1, 2020

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