Poly(o-xylylene)s via Cobalt-Catalyzed Reductive Polymerization  

作　　者：Si Chen Yanchuan Zhao 

机构地区：[1]Key Laboratory of Organofluorine Chemistry,Center for Excellence in Molecular Synthesis,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,345 Ling-Ling Road,Shanghai 200032,China [2]Key Laboratory of Energy Regulation Materials,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,345 Ling-Ling Road,Shanghai 200032,China

出　　处：《Chinese Journal of Chemistry》2020年第9期952-958,共7页中国化学（英文版）

基　　金：This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDC06020102);the National Natural Science Foundation of China(21871291,91956120,21421002)。

摘　　要：Summary of main observation and conclusion 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.

关 键 词：properties. reaction. POLYMERIZATION 

分 类 号：O62[理学—有机化学]