Molecular and crystal structure of an azobenzene-linked amphiphile, C33H54N3O3Br.

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概要

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• Azobenzene-linked, single-chain ammonium amphiphile (C<SUB>12</SUB>AzoC<SUB>5</SUB>N<SUP>+</SUP>Br<SUP>−</SUP>), C<SUB>33</SUB>H<SUB>54</SUB>N<SUB>3</SUB>O<SUB>3</SUB>Br, was crystallized from their solutions in water and ethanol. The crystals are triclinic with the space group <I>P</I>\bar1, <I>Z</I>=2, <I>a</I>=3.4243(6), <I>b</I>=0.8525(1), <I>c</I>=0.6073(1)nm, α=73.45(1), β=88.03(1), and γ=93.32(1)°. The structure was solved by the direct method and refined anisotropically by the block-diagonal least-squares procedure: <I>R</I>=0.06 for 2917 observed reflections (2θ<105°, Cu <I>K</I>α, λ=0.154184 nm). The crystal structure consists of regularly stacking bimolecular layers in which C<SUB>12</SUB>AzoC<SUB>5</SUB>N<SUP>+</SUP>Br<SUP>−</SUP> molecules incline about 30° to the layer surface. As expected from spectroscopic analyses, the azobenzene chromophore shows a head-to-tail (J-like) aggregation between adjacent molecules. The pronounced planarity of the azobenzene chromophore found in this crystal structure enables parallel stacking of phenyl groups in the J-like aggregation.

• 公益社団法人 日本化学会の論文

著者

• Kunitake Toyoki

  Faculty Of Engineering Kyushu University

• Okuyama Kenji

  Faculty Of Technology Tokyo University Of Agriculture & Technology

• KAJIYAMA Tisato

  Faculty of Eng.,Kyushu Univ.

• Watanabe Hitoshi

  Faculty Of Agriculture University Of Tokyo

• Yasuoka Noritake

  Institute for Protein Research, Osaka University

• Hirabayashi Kiyoshi

  Faculty of Technology, Tokyo University of Agriculture and Technology

• Shimomura Masatsugu

  Faculty of Technology, Tokyo University of Agriculture and Technology

• Watanabe Hitoshi

  Faculty of Technology, Tokyo University of Agriculture and Technology

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