日本結晶学会誌
Online ISSN : 1884-5576
Print ISSN : 0369-4585
ISSN-L : 0369-4585
55 巻 , 6 号
選択された号の論文の12件中1~12を表示しています
総合報告
  • 草本 哲郎, 神戸 徹也, 西原 寛
    2013 年 55 巻 6 号 p. 323-330
    発行日: 2013/12/31
    公開日: 2013/12/31
    ジャーナル フリー
    The development of functional metalladithiolene complexes was described. Photo-, magneto-, and electro-functional moieties were hybridized with a metalladithiolene backbone to produce novel electronic properties, such as photo-controlled three-state switching, and a SOMO-HOMO converted electronic structure. Long range electronic communication and three-dimensional clusterization were achieved on triangular trinuclear metalladithiolene complexes. The atomiclayer nickel dithiolene nanosheet was successfully prepared, in which nickel bis(dithiolene)moieties were connected through benzene skeletons to form a fully π-conjugated hexagonal structure in two dimensions. The electric properties of the stacked nanosheets were modulated by chemical redox reaction.
  • 竹中 康司
    2013 年 55 巻 6 号 p. 331-339
    発行日: 2013/12/31
    公開日: 2013/12/31
    ジャーナル フリー
    Magnetostructural correlations in antiperovskite manganese nitrides Mn3AN(A :metal or semiconducting element)are briefly reviewed based on the recent experiments on thermal expansion, crystal structure, and magnetization. This class of nitrides is attracting great attention because of the giant negative thermal expansion, which is achieved by doping Ge or Sn into the A site as relaxant of the sharp volume change due to magnetovolume effects. Physical background of the large volume change(spontaneous volume magnetostriction ωs)and the mechanism of its broadening are central concerns for physics and application of these nitrides. Intimate relation between large ωs and the cubic triangular antiferromagnetic structure is discussed in terms of magnetic stress concept and geometrical frustration related to the Mn6N octahedron. Local structure anomaly suggested by recent microscopic probes is also referred as a possible driving force of the broadening of volume change.
  • 福山 恵一 , 和田 啓
    2013 年 55 巻 6 号 p. 340-344
    発行日: 2013/12/31
    公開日: 2013/12/31
    ジャーナル フリー
    γ-Glutamyltranspeptidase(GGT) is a heterodimic enzyme that undergoes post-translational processing and catalyzes the hydrolysis of γ-glutamyl bond in such compounds as glutathione and/or the transfer of the γ-glutamyl group to other amino acids and peptides. We have determined the several crystal structures of GGT orthologs and their complex structures with the substrate/product and inhibitors as well as GGT precursor. These structures demonstrate the mechanism of the maturation, catalytic reaction and substrate recognition of GGT.
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