本實驗是在高壓環境下，用紅外吸收光譜探討離子液體和polyethylene oxide (PEO) 之間作用與結構的變化。
常壓下，由於紅外光譜觀察在不同比例混合成的PEO與離子液體間其陰陽離子的變化，發現PEO的加入會使陽離子上的C2-H 以及偶合的C4、5-H stretching產生相對藍位移的現象；而其他像是alkylC-H stretching 的頻率變化則幾乎沒有改變，這說明了溶解的PEO主要影響陽離子環上的C2-H和C4、5-H鍵，對於烷基則沒有什麼太大的影響。
在我們改變壓力的環境條件下，純離子液體會隨著壓力升高而有藍位移的趨勢，表示在壓力的幫助下會使純離子液體產生結構上的改變，壓力對1-butyl-3-methylimidazolium bromide影響較大產生了峰分裂，PEO與離子液體的混合物都會有隨著壓力升高而藍位移的趨勢，合理的解釋為，在高壓的環境能夠使原本作用在離子液體中陰陽離子形成的大團簇之間的PEO分子因為壓力的改變，造成其混合物結構變化，在不同壓力下會有不同鍵結形態，使混合物與離子液體的趨勢不盡相同。

This study focus on experiments is under high-pressure environment, We use Fourier transform spectrophotometer to explore the changes in the interactions and structures between ionic liquid and polyethylene oxide (PEO).
At atmospheric pressure, the changes of anion and cation causely by PEO and ionic liquid mixed in different proportions were observed by infrared spectrum,It was found that the PEO addition will cause blue shift phenomenon of coupled C2-H and C4, 5-H stretching of the cation, while the frequency change of the alkylC-H stretching is almost unchanged, These result indicate that the dissolved PEO mainly affects the C2-H and C4, 5-H bonds of the cationic ring, and there is not noticeable effects for alkyl groups .
Upon changing the pressure, the pure ionic liquid reveals blue shifts with the pressure increased, indicating that the structures of the pure ionic liquid undergo structural changes with the pressure change. The pressure has a great effect on 1-butyl-3-methylimidazolium bromide and peak splitting occurs, The mixtures of PEO and ionic liquid have a tendency of blue shift as the pressure increases. A reasonable explanation is that in the changes of high-pressure environments clusters of anions and cations in ionic liquids and mixtures of PEO and PEO with ionic liquids due to pressure elevations, cause variations in the structure of the mixtures. There are various bonding morphologies under pressures and the trends of mixtures and ionic liquids are not the same.

一、 研究動機 1
1.離子液體概述 1
2.polyethylene oxide （PEO）的性質 5
3.弱氫鍵 7
二、 研究內容 9
1. 儀器 9
1-1 紅外光譜儀 9
1-2 精密萬能鑽孔機及高速鑽頭 12
1-3 Diamond anvil cell (DAC) 12
1-4 鎳鉻合金墊片 14
1-5 顯微鏡 14
1-6 水份分析儀 15
2. 藥品 16
2-1 藥品名稱: 1-hexyl-3-methylimidazolium bromide 16
2-2 藥品名稱: 1-butyl-3-methylimidazolium bromide 16
2-3 藥品名稱: polyethylene oxide 17
2-4 藥品名稱:Acetonitrile 17
3. 方法 19
3-1 高壓原理 19
3-2 壓力校正 19
三、 實驗步驟 23
1. 常壓實驗 23
2.高壓實驗 24
3.圖譜製作 27
四、 結果與討論 29
五、 結論 55
六、 參考文獻 57

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