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研究生： 郭又瑋
Kuo, Yu-Wei
論文名稱： 咪唑、吡啶和鈷(Ⅱ)、錳(Ⅱ)鹽類之合成、晶體結構、熱性質以及磁性探討
Synthesis, investigation of crystal structures, thermal and magnetic properties of imidazolium and pyridinium salts of cobalt(Ⅱ) and manganese(Ⅱ)
指導教授： 蘇世剛
Su, Shyh-Gang
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： 2012
畢業學年度： 100
語文別： 中文
論文頁數： 96
中文關鍵詞： 雙陽離子 、四氯化鈷 、四氯化錳 、熱安定性 、直流磁化率
外文關鍵詞： dication, tetrachlorocobaltate(II), tetrachloromanganate (II), thermal stability, direct current magnetic susceptibility
相關次數： 點閱：89  下載：7 
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    • 以雙陽離子作為陽離子的熔鹽結構文獻上有報導過，其磁化率會高於用二個單陽離子做陽離子的熔鹽來的高，這是一個奇特的發現。然而此種鹽類的熔點偏高，使得應用上會受到限制，因此想針對此缺點去進行改良。並探討碳鏈長短對磁化率是否會有所影響。
    設計出的鹽是以雙陽離子(咪唑、吡啶)為陽離子搭配過度金屬(鈷、錳)為陰離子的組合，合成出兩系列化合物。第一部分為陰離子為[CoCl4]2-、[MnCl4]2-的結構，其為熱安定性化合物，且均可溶在高極性溶劑中。此外與文獻相比，藉碳鏈的增加，確實可以降低熔點。所有化合物皆為反磁性物質，磁化率值並未如預期提高，其數值落在文獻的數據範圍內。
    第二部分陰離子為[CoBrxCl(4-x)]2-、[MnBryCl(4-y)]2-，為熱安定性化合物，可溶在高極性溶劑中，如水和甲醇。此系列化合物皆屬於反鐵磁性物質，由於結構較特殊，目前尚未找到類似的結構可以做χMT值的比較，無法判斷碳鏈對於χMT值是否有影響。

    It has been reported that the molten salts with dicationic system have higher magnetic susceptibility than monocationic counterion. It is an interesting discovery. However, the application of these kinds of molten salts are restricted because of their high melting point. In this study, we try to improve this drawback by increasing the carbon chain linked to two monocations of the molten salts. Besides, we also discuss the relationship between the carbon chain and magnetic susceptibility of these compounds.
    The salts consisting of dicationic (imidazolium, pyridinium) and transition metal-based anion (Co, Mn) are synthesized. The first type of dicationic salt, which contains [CoCl4]2-、[MnCl4]2- anions, is thermal stable and can soluble in polar solvents. The melting point of these compounds with long carbon chain linked to two monocations are lower than the reported examples. All compounds exhibit antiferromagnetic interactions, and the carbon chain does not affect their magnetic susceptibility.
    The second type of dicationic salt, which contains [CoBrxCl(4-x)]2-、[MnBryCl(4-y)]2- anions, is thermal stable and can soluble in high polar solvents such as methanol and water. Magnetic measurements indicate these compounds are antiferromagnetic. Because of special structure, it is hard to judge whether magnetic susceptibility is affected by carbon chain or not.

    摘要 I Abstract II 誌謝 III 目錄 IV 圖目錄 VI 表目錄 X 附錄 XI 第一章 緒論 1 1-1離子液體 1 1-2雙陽離子液體 3 1-3帶有磁性離子液體 7 1-4動機 11 第二章 實驗原理 13 2-1 磁性來源 13 2-2磁性分類 14 2-2-1順磁性(Paramagnetism) 14 2-2-2反磁性(Diamagnetism) 15 2-2-3鐵磁性(Ferromagnetism) 16 2-2-4 反鐵磁性(Anti-ferromagnetism) 16 2-2-5陶鐵磁性(Ferrimagnetism) 17 第三章 藥品與儀器設備 19 3-1藥品 19 3-2 儀器設備 20 第四章 結果與討論 23 4-1含[CoCl4]2-、[MnCl4]2-的鹽類化合物 23 4-1-1合成 24 4-1-2結構鑑定 26 4-1-3 X-ray粉末繞射儀 37 4-1-4熱分析 39 4-1-5磁性 47 4-1-6溶解度 53 4-2含[CoBrxCl(4-x)]2-、[MnBryCl(4-y)]2-的鹽類化合物 54 4-2-1合成 55 4-2-2結構鑑定 57 4-2-3 X-ray粉末繞射儀 62 4-2-4熱分析 64 4-2-5磁性 66 4-2-6溶解度 68 第五章 結論 70 參考文獻 71

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