Helical Pitch Dependent Optical Properties of π-Extended Aza[5]helicene Radical Cations

• Satoru Hiroto

  Graduate School of Human and Environmental Studies, Kyoto University, Nihonmatsu-cho, Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan

抄録

We prepared a series of π-extended aza[5]helicenes with different substituents at internal positions. The structures determined by X-ray diffraction analysis revealed that the steric bulkiness of substituents affected the helical pitch of aza[5]helicenes. Their UV/vis absorption spectra showed little dependence on structural distortion. However, the absorption spectra of oxidized species were considerably dependent on internal substituents. Finally, theoretical calculations confirmed that the intramolecular through-space interaction caused a hypochromic shift of the lowest energy bands for the oxidized species.

収録刊行物

• Bulletin of the Chemical Society of Japan

  Bulletin of the Chemical Society of Japan 93 (11), 1334-1338, 2020-07-03

  Oxford University Press (OUP)

キーワード

• General Chemistry

詳細情報

• CRID: 1361412342208658304
• NII論文ID: 130007939764
• DOI: 10.1246/bcsj.20200181
• ISSN: 13480634
• ISSN: 00092673
• Web Site: https://academic.oup.com/bcsj/article-pdf/93/11/1334/56305624/bcsj.20200181.pdf
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