Helicene-grafted silica nanoparticles capture hetero-double-helix intermediates during self-assembly gelation

Masamichi Miyagawa, Masahiko Yamaguchi

研究成果: Article査読

6 被引用数 (Scopus)

抄録

A mixture of a pseudoenantiomeric ethynylhelicene (M)-tetramer and a (P)-pentamer forms a hetero-double-helix in a solution, which self-assembles and gelates solvents. When gelation was conducted in the presence of chiral silica (P)-nanoparticles grafted with (P)-helicene, the resulting hetero-double-helix intermediate was adsorbed on the (P)-nanoparticles, and was removed from the solution by aggregation and precipitation. The resulting precipitates contained only the hetero-double-helix, not random coil or clusters of the hetero-double-helix. (P)-Nanoparticles did not extract the hetero-double-helix from the self-assembly gels. The hetero-double-helix was then isolated by liberating it from the precipitates in 2-bromopropionic acid, and was crystallized from the solution. The crystalline hetero-double-helices were isolated for several other combinations of pseudoenantiomeric ethynylhelicene oligomers.

本文言語English
ページ(範囲)8408-8415
ページ数8
ジャーナルChemistry - A European Journal
21
23
DOI
出版ステータスPublished - 2015 6月 1

ASJC Scopus subject areas

  • 触媒
  • 有機化学

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