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    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/6206


    題名: 雙咪唑鹽與單咪唑鹽離子液體的合成與性質研究;Syntheses and properties of diimidazolium ionic liquid and monoimidazolium ionic liquid
    作者: 簡清旭;Ching-Shiu Jian
    貢獻者: 化學研究所
    關鍵詞: 氫氘交換反應;離子液體;H-D exchange reaction;ionic liquid
    日期: 2006-07-05
    上傳時間: 2009-09-22 10:15:37 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 本論文中所合成出來的雙咪唑離子液體(1-1-1、2-1-2、3-1-3、4-1-4),環上2號與5號位置上的質子都會進行氫氘交換反應,只不過兩者反應條件並不相同。在2號位置上的氫氘交換反應,只需要在中性D2O中即可進行;能否交換與溶液的pH值有關,當pH值小於2時,氫氘交換反應並不會進行,隨著pH的增加氫氘交換反應的速率加快。在5號位置上的氫氘交換反應,必須有額外的鹼(如N-甲基咪唑)才會進行,其交換反應速率與N-甲基咪唑的濃度呈現正比的關係。 本論文中也合成兩類單咪唑離子液體。第一類是在室溫下為液態的磁性離子液體[BMIM]FeCl4。其磁化率為40.6x10-6 emu g-1。第二類為掌性離子液體(1R、1S、2R、2S),是在高壓反應器中進行脫水縮合合成的,實驗過程較為簡單,產率與文獻法比較相似。對掌性離子液體1R、1S、2R、2S均測得其旋光度。 The diimidazolium-based ionic liquids (1-1-1, 2-1-2, 3-1-3 and 4-1-4) were successfully synthesized. The C-2 and C-5 protons of the imidazolium ring show H-D exchange in D2O to different extents. There is a large pH effect on the H-D exchange rate constant for the C-2 protons. Once the pH value gets lower than 2, the H-D exchange for the C-2 protons almost stops. For the H-D exchange of C-5 protons, it needs the addition of a base (N-methyl imidazole) for the reaction to proceed. A linear relationship between the H-D exchange rate constant and the concentration of N-methyl imidazole was observed. The monoimidazolium-based ionic liquids were also prepared, among which are two types of ionic liquids: (1) The magnetic ionic liquid [BMIM]FeCl4, which is a liquid at room temperature and exhibits a magnetic susceptibility of 40.6x10-6 emu g-1. (2) chiral ionic liquids (1R,1S,2R,2S) which can be obtained by condensation in an autoclave. The preparation with autoclave resueted in a good yields, which are comparable to the yields regarted earlier. The optical rotation characters were measured for these chiral ionic liquids.
    顯示於類別:[化學研究所] 博碩士論文

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