title: Chiral amplification during asymmetric-induced copolymerization of phenylacetylenes with tight cis-cisoidal main chains.
abstract: A novel phenylacetylene (1) having two hydroxyl groups and a chiral pinanyl group together with the other three related phenylacetylenes has been synthesized and (co)polymerized by using an achiral catalytic system. Among the four monomers, only 1 is suitable to the asymmetric-induced polymerization (AIP). Chiral amplification phenomenon is only observed in the copolymerization of 1 with an achiral phenylacetylene having two hydroxyl groups (3). The tight helical cis-cisoidal main chain formed by making intramolecular hydrogen bonds between the hydroxyl groups in the copoly(1/3) enhances the efficiency of chiral induction and as a result chiral amplification phenomenon is observed during the copolymerization.
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education and Polymer Materials Research Center, Harbin Engineering University, Harbin 150001, China. liulijia@hrbeu.edu.cn
authors.forename: Lijia
authors.initials: L
authors.lastname: Liu
authors.forename: Kazuomi
authors.initials: K
authors.lastname: Mottate
authors.forename: Geng
authors.initials: G
authors.lastname: Zhang
authors.forename: Toshiki
authors.initials: T
authors.lastname: Aoki
authors.forename: Takashi
authors.initials: T
authors.lastname: Kaneko
authors.forename: Masahiro
authors.initials: M
authors.lastname: Teraguchi
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry; D002384:Catalysis; D002942:Circular Dichroism; D006860:Hydrogen Bonding; D008968:Molecular Conformation; D058105:Polymerization; D013237:Stereoisomerism
chemical_list: C044736:phenylacetylene; D000114:Acetylene
keywords: asymmetric-induced (co)polymerization; chiral; hydrogen bonding; main-chain conformation; polyphenylacetylene