IMRAM

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

東北大学
多元物質科学研究所

LAST UPDATE 2021/05/02

  • 研究者氏名
    Researcher Name

    山根久典　Hisanori YAMANE
    教授　Professor

  • 所属
    Professional Affiliation

    東北大学多元物質科学研究所
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門　無機固体材料合成研究分野
    Division of Inorganic Material Research, Inorganic Crystal Structural Materials Chemistry

  • 研究キーワード
    Research Keywords

    無機固体化学
    無機結晶構造化学
    新規無機物質・材料探索
    無機結晶構造解析
    Inorganic solid state chemistry
    Inorganic structural chemistry
    Synthesis of novel inorganic compounds and materials
    Crystal structure analysis of inorganic solid state compounds
研究テーマ
Research Subject
新規多元系無機化合物の合成と結晶構造解析、特性評価
Synthesis, structure analysis and characterization of new multinary inorganic compounds

研究の背景 Background

多種元素の組み合せからなる無機化合物には広大な未開拓の物質群があり、既知の物質では実現されない構造や特性をもつ物質が潜んでいる可能性があります。新たな物質の合成には新たな合成手法の開拓も大切で、新規物質の発見で得られる知見は、次の時代の物質材料科学を根底で支える貴重な文化遺産です。

Wide fields of inorganic compounds consisting of various elements are still uncultivated, and multinary compounds having unknown crystal structures and properties may lie hidden. Development of new synthetic methods is important for the preparation of the new compounds. The knowledge obtained by the discovery of the new compounds is valuable heritage which will support material science in the next generation.

研究の目標 Outcome

無機固体化学の観点から新規多元系無機化合物を探索し、これに必要な新たな合成手法として活性金属融液などの反応媒体を利用した合成法の開発をすすめ，得られた物質の結晶構造をX線回折法で解析し、電気特性や発光特性などを評価して、それらの新しい素材としての可能性を明らかにすることを目標としています。

New multinary inorganic compounds, such as ternary and quaternary oxides, nitrides, and Zintl compounds have been synthesized by a newly developed method using melts of active metals as well as by conventional synthetic methods. Their crystal structures have been clarified by X-ray diffraction, and their properties such as electrical and ionic conductions, photoluminescence, and thermoelectric power generation have been characterized.

研究図Research Figure

Fig.1. Crystal structures of MgBa4[Si2N6]. The compound consist of edge-sharing SiN4 tetrahedra of isolated nitridosilicate anions [Si2N6]10−. Mg2+ cations are planar- rectangularly coordinated by four nitrogen atoms.Fig.2. Crystal structure of Li2B3PO8. The sheets of ∞2[B3PO8]2− formed by the linkage of triangular BO3 and tetrahedral BO4 and PO4 groups stack along the b-axis direction.Fig.3. Projective view of the crystal structure of Li2NaBP2O8 along the a axis. One-dimensional ∞1[BP2O8]3− chains are formed in the direction of the c axis by linkage of the four-membered rings composed of two PO4 and two BO4 tetrahedra.

文献 / Publications

J. Alloys Compnd., 555 (2013) 320–324, Dalton Trans., 43 (2014) 14525–14528, J. Solid State Chem., 225 (2015) 65–71.

研究者HP