| 研究生: |
葉哲綸 Ye, Zhu-Lun |
|---|---|
| 論文名稱: |
多元金屬硫族化合物的合成、結構鑑定和物理性質研究 Synthesis, Structures, and Physical Properties of Multinary Metal Chalcogenides |
| 指導教授: |
許桂芳
Hsu, Kuei-Fang |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2013 |
| 畢業學年度: | 101 |
| 語文別: | 中文 |
| 論文頁數: | 66 |
| 中文關鍵詞: | 硫族化合物 、熱電 |
| 外文關鍵詞: | Chalcogenides, thermoelectric |
| 相關次數: | 點閱:43 下載:0 |
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本研究以助熔長晶法,合成出兩種不同結構化合物。分別為化合物1、化合物2。
化合物1其晶系為Orthorhombic Pnma。此結構利用CuSe3、MSe4 (M = Cu、In)形成3D立體結構骨架,並且InSe4形成四面體以共用點串接沿b軸延伸和陽離子Ba2+填充在孔道中。化合物1因為部分原子位置有Cu和In的錯排(disorder),造成解出分子式不平衡。因此,以佔有率及價數平衡原則解出分子式,並以分子式嘗試純相合成。
化合物2,其晶系為Monoclinic P21/m。此結構利用InTe3、MTe4、MTe5 (M = Ag或In)形成3D立體結構骨架。在孔洞中,MTe4 四面體以共用點沿b軸串接和陽離子Ba2+一起填充在孔道中。化合物2因為Ag、In無法藉由X-ray分辨電子密度。由B. V. S. (Bond valence sum)輔證,部分原子位置有Ag和In的混填,由程式指令精算有問題位置皆為發散。因此,以佔有率及價數平衡原則解出分子式,並以分子式嘗試更好單晶合成條件。
Two new compounds, 1 and 2, have been synthesized through solid state reactions with KBr flux.
Compound 1 crystallizes in the orthorhombic Pnma, which adopts a new three-dimensional framework structure. The framework in 1 is composed of two distinct infinite chain with Ba2+ cations distributed within the tunnels.The first chain is constructed by CuSe3 triangular plane and MSe4 (M = Cu, In) tetrahedral.The second chain is constructed by InSe4 tetrahedral.
Compound 2 crystallizes in the monoclinic P21/m, which possesses a new three-dimensional framework structure. The framework in 2 is composed of InTe3 triangular plane, MTe4 tetrahedral, and MTe5 (M = Ag or In) polyhedra with Ba2+ cations distributed within the tunnels.
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校內:2023-12-31公開