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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Chiral/Achiral Copolymers of Biphenylylacetylenes Bearing Various Substituents: Chiral Amplification through Copolymerization, Followed by Enhancement/Inversion and Memory of the Macromolecular Helicity

http://hdl.handle.net/2237/00032331
http://hdl.handle.net/2237/00032331
48f347a9-238c-41ba-948f-3cf0281bbe8a
名前 / ファイル ライセンス アクション
Yashima-Rev.pdf Yashima-Rev (2.7 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-06-10
タイトル
タイトル Chiral/Achiral Copolymers of Biphenylylacetylenes Bearing Various Substituents: Chiral Amplification through Copolymerization, Followed by Enhancement/Inversion and Memory of the Macromolecular Helicity
言語 en
著者 Ikai, Tomoyuki

× Ikai, Tomoyuki

WEKO 99511

en Ikai, Tomoyuki

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Ishidate, Ryoma

× Ishidate, Ryoma

WEKO 99512

en Ishidate, Ryoma

Search repository
Inoue, Kazuya

× Inoue, Kazuya

WEKO 99513

en Inoue, Kazuya

Search repository
Kaygisiz, Kübra

× Kaygisiz, Kübra

WEKO 99514

en Kaygisiz, Kübra

Search repository
Maeda, Katsuhiro

× Maeda, Katsuhiro

WEKO 99515

en Maeda, Katsuhiro

Search repository
Yashima, Eiji

× Yashima, Eiji

WEKO 99516

en Yashima, Eiji

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 “This document is the Accepted Manuscript version of a Published Work that appeared in final form in [Macromolecules], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [https://pubs.acs.org/articlesonrequest/AOR-xgVjggYcKjnj4rbbRKIP].”
抄録
内容記述 A series of dynamic helical homo- and copolymers of chiral and/or achiral biphenylylacetylenes (PBPAs) bearing achiral methoxymethoxy or acetyloxy groups at the 2,2′-positions along with a chiral or achiral alkyl ether or alkoxy carbonyl group at the 4′-position of the biphenyl pendants were synthesized. The effects of the chiral/achiral substituents at different positions on their helical structures and amplification of the helicity through covalent and further noncovalent chiral interactions followed by the memory of the helicity were investigated. The chiral homopolymers formed a preferred-handed helical structure as revealed by their circular dichroism (CD) spectra, whose Cotton effect signs and intensities were significantly dependent on the chiral/achiral pendant groups introduced at the 2,2′,4′-positions of the biphenyl units as well as the solvents and temperatures, while the corresponding poly(phenylacetylene)s carrying the identical chiral substituents exhibited negligible CDs. Among the chiral homopolymers, a PBPA bearing the 2,2′-methoxymethoxy and 4′-chiral alkyl ether groups showed a unique helix-inversion/switching in aliphatic hydrocarbons according to whether they are cyclic or acyclic. The chiral/achiral copolymers displayed a moderate amplification of the helicity due to the chiral units covalently bonded to the pendants (the sergeants-and-soldiers effect). The macromolecular helicity of the copolymers with imperfect or no helical sense excesses was, however, significantly enhanced to the almost completely one-handed helices or inverted to the opposite ones through noncovalent chiral interactions with enantiomeric alcohols, which could be further memorized after the complete removal of the chiral alcohols.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2021-02-11
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 ACS Publications
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1021/acs.macromol.9b02727
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0024-9297
書誌情報 en : Macromolecules

巻 53, 号 3, p. 973-981, 発行日 2020-02-11
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