Langmuir-Blodgett films of charge-transfer complexes: ethylenedithio-substituted amphiphilic bis-TTF macrocycle and F4TCNQ or Br2TCNQ

• Toru Endo

• Tomoyuki Akutagawa

• Teppei Kajiwara

書誌事項

タイトル別名

• Langmuir Blodgett films of charge transfer complexes ethylenedithio substituted amphiphilic bis TTF macrocycle and F4TCNQ or Br2TCNQ

抄録

Charge-transfer (CT) complexes between ethylenedithio-substituted bis-TTF macrocycle 1a, as an amphiphilic electron donor, and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) derivatives, as electron acceptors, were fabricated as Langmuir–Blodgett (LB) films. For the 1a–F4TCNQ LB film deposited at a surface pressure of 5 mN m−1 onto a substrate surface, the stoichiometry between the donor and acceptor was determined as 1:2 using XPS measurements. In contrast, a donor/acceptor ratio of 1:0.3 was observed for the 1a–Br2TCNQ LB film, indicating that a fraction of Br2TCNQ was lost during the LB film formation process. Similarity of the round-shaped domains that cover the surfaces of the 1a–Br2TCNQ and neutral 1a LB films indicates the presence of neutral 1a within the 1a–Br2TCNQ LB film. For the (1a2+)(F4TCNQ−)2 LB film, the presence of a CN-stretching frequency signifies the formation of a fully ionic electronic ground state. The LB film of 1a–Br2TCNQ exhibited a broad absorption at ca. 3 × 103 cm−1, which is characteristic of an intermolecular CT transition for a partial CT state. 1a–Br2TCNQ LB film consisted of neutral 1a and CT complex of 1a–Br2TCNQ. The room temperature conductivity of the 1a–Br2TCNQ LB film (1.2 × 10−2 S cm−1) was two orders of magnitude higher than that of 1a–F4TCNQ (3.9 × 10−4 S cm−1).

収録刊行物

• Bulletin of the Chemical Society of Japan

  Bulletin of the Chemical Society of Japan 82 (8), 968-974, 2009

  Tokyo : Chemical Society of Japan

キーワード

• General Chemistry

詳細情報

• CRID: 1521699230383864192
• NII論文ID: 10025126961
• NII書誌ID: AA00580132
• ISSN: 00092673
• ISSN: 13480634
• DOI: 10.1246/bcsj.82.968
• NDL書誌ID: 10308264
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10308264
• Web Site: https://academic.oup.com/bcsj/article-pdf/82/8/968/56271135/bcsj.82.968.pdf
• 本文言語コード: en
• NDL 雑誌分類:
  • ZP1(科学技術--化学・化学工業)
• データソース種別:
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