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Na5M(2+x) Sn(10-x) (x 約=0.5,M=Zn,Hg) の合成と特徴付け - ドーピングされた四面体構造のフレームワーク構造である
Siméon Ponou1, Sung-Jin Kim, Thomas F Fässler
1Department Chemie der Technischen Universität Munchen, Lichtenbergstrasse 4, D-85747 Garching, Germany.
Journal of the American Chemical Society
|July 23, 2009
まとめ
新しいナトリウム亜鉛と水銀亜鉛化合物が合成され,構造的に特徴づけられました. 電子に富んだ性質から,熱電気材料としての潜在的応用が示唆される.
科学分野:
- 固体化学 固体化学
- マテリアルサイエンス 材料科学
- クリスタログラフィーです.
背景:
- Zintl相は,電極陽性元素と,より電極陰性元素によって形成された化合物です.
- 亜鉛基の材料は,独自の構造的および電子的特性により興味を惹きます.
研究 の 目的:
- 新しいナトリウム金属亜鉛化合物を合成し,特徴づけること.
- これらの新しい相の結晶構造と電子特性を調査する.
- 熱電気材料としての潜在能力を探求する.
主な方法:
- 高温での元素の直接反応.
- 構造的決定のための単結晶X線 difraktion.
- 電子構造の研究のための密度関数理論 (DFT).
主要な成果:
- 2つの新しい同構造化合物,Na ((5) Zn ((2.28) Sn ((9.72) とNa ((5) Hg ((2.39) Sn ((9.61)) が合成されました.
- これらの化合物は,アニオンの3Dオープンフレームワークとカチオンの2D配列を特徴とする,チンの化学における新しい構造型を示しています.
- 電子構造分析は,これらの相は電子が豊富で,重量ドーピングされた半導体として振る舞うことを示しています.
結論:
- 合成されたNa-M-Sn化合物は,亜鉛化学における新しい構造家族を表しています.
- 電子特性は,熱電性材料の要求事項と一致しています.
- 熱電性能に関するさらなる研究が必要である.
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