Na6ZnSn2,Na4.24K1.76(1)ZnSn2,Na20Zn8Sn11:線形{Sn-Zn-Sn}6単位を含む3つのインターメタリック構造である
Sung-Jin Kim1, Florian Kraus, Thomas F Fässler
1Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany.
Journal of the American Chemical Society
|January 14, 2009
まとめ
新しいアルカリ金属化合物Na6ZnSn2,Na4.24K1.76ZnSn2,Na20Zn8Sn11は,線形{Sn-Zn-Sn}6アニオンと新しい{Zn7Sn5}アイコサヘドラル層を特徴としています. 量子化学分析により,共振性Sn-Zn結合が確認されました.
科学分野:
- 固体化学 固体化学
- 無機化学 無機化学とは
- マテリアルサイエンス 材料科学
背景:
- 新しい金属間化合物の探査は,化学結合を理解し,新しい材料を発見するために不可欠です.
- 移行後の金属とアルカリ金属化合物は,多様な構造モチーフと電子特性を有しています.
研究 の 目的:
- ナトリウム,カリウム,亜鉛,チンの新しい金属間化合物を合成し,特徴づけること.
- これらの新種の化合物の結晶構造と結合特性を解明する.
- 合成された材料の電子構造と磁気特性を調査する.
主な方法:
- 元素前駆者の直接融合. 元素前駆者の直接融合.
- 構造的決定のための単結晶X線 difraktion.
- 結合分析のための量子化学計算 (NBO,AIM,ELF,DFT/LMTO) を行う.
- 磁気感受性の測定. 磁気感受性の測定. 磁気感受性の測定. 磁気感受性の測定.
主要な成果:
- 3つの新しい金属間化合物,Na6ZnSn2 (1),Na4.24K1.76ZnSn2 (2),およびNa20Zn8Sn11 (3) が合成されました.
- すべての化合物は,短いZn-Sn結合を持つ線形{Sn-Zn-Sn}6-アニオンと,{Zn7Sn5}イコサヘドール層を含む化合物3を含む新しい構造タイプを示しています.
- 量子化学分析により,亜鉛と亜鉛の原子間の共性結合が確認され,Na-Sn接触は,弱い二磁性を示す化合物1でも役割を果たしている.
結論:
- 合成された化合物は,アルカリ金属-プニクチド化学における新しい構造型を表しています.
- 線形{Sn-Zn-Sn}6アニオンと{Zn7Sn5}イコサヘドラの存在は,ユニークな結合機構を強調しています.
- この研究は,これらの複雑な金属間相における共性結合とイオン結合の相互作用についての洞察を提供します.
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