Efficient Synthesis of Rigid Ladder Polymers via Palladium Catalyzed Annulation | Zendy

Sheng Liu | Zendy; Zexin Jin | Zendy; Yew Chin Teo | Zendy; Yan Xia | Zendy

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Efficient Synthesis of Rigid Ladder Polymers via Palladium Catalyzed Annulation

Author(s) -

Sheng Liu,

Zexin Jin,

Yew Chin Teo,

Yan Xia

Publication year - 2014

Publication title -

journal of the american chemical society

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja5110415

Subject(s) - norbornene , chemistry , annulation , polymer chemistry , monomer , polymer , copolymer , aryl , polymerization , cationic polymerization , catalysis , palladium , addition polymer , thermal stability , organic chemistry , alkyl

We report a new method to synthesize rigid ladder polymers using efficient palladium catalyzed annulation reactions with low catalyst loading (1 mol %). Rigid ladder polymers with benzocyclobutene backbone linkages can be synthesized from copolymerization of readily accessible aryl dibromides and norbornadiene or polymerization of AB type monomers bearing norbornene and aryl bromide or triflate moieties. High molecular weight (10-40 kDa) rigid ladder polymers can be obtained with complete monomer conversions. Diverse monomers also gave different, fixed ladder polymer conformations. The ladder polymers exhibited excellent thermal stability, high carbonization yield, and large intrinsic porosity.

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