本文選題：醚基咪唑離子液體　切入點(diǎn)：熱重紅外聯(lián)用　出處：《遼寧大學(xué)》2017年碩士論文

【摘要】：文章中合成了疏水性離子液體1-乙基甲基醚-3-甲基咪唑雙三氟甲基磺酰亞胺離子液體和1-乙基乙基醚-3-甲基咪唑雙三氟甲基磺酸亞胺離子液體。對(duì)這兩種醚基咪唑離子液體以及對(duì)應(yīng)的中間體1-乙基甲基醚-3-甲基咪唑溴鹽和1-乙基乙基醚-3-甲基咪唑溴鹽進(jìn)行核磁共振氫譜(~1HNMR),核磁共振碳譜(~(13)CNMR)分析表征,TG的譜圖分析后確定該中間體以及最終產(chǎn)物無(wú)雜質(zhì)為目標(biāo)離子液體。在過(guò)去的研究中,使用TGA方法測(cè)定離子液體汽化焓,有人提出高溫恒溫溫度段中離子液體可能發(fā)生分解。本文的創(chuàng)新點(diǎn)是使用TG IR在與TG實(shí)驗(yàn)相同的實(shí)驗(yàn)條件下,測(cè)出每一個(gè)恒溫溫度段中,揮發(fā)出氣體的紅外譜圖。通過(guò)對(duì)不同溫度段獲得的紅外譜圖的對(duì)比,佐證離子液體未發(fā)生分解,推測(cè)離子液體分解溫度。進(jìn)而使用TGA分析方法,通過(guò)恒溫溫度段范圍內(nèi)的失重量,測(cè)定離子液體的平均溫度的汽化焓。Verevkin等人發(fā)表的文章中提出過(guò)在統(tǒng)計(jì)熱力學(xué)基礎(chǔ)上能夠計(jì)算出離子液體氣態(tài)和液態(tài)的熱容差△_1~gC_(p·m)。利用計(jì)算出離子液體的氣態(tài)和液態(tài)熱容差,從而將使用TGA計(jì)算出離子液體平均溫度的汽化焓轉(zhuǎn)化為298K的汽化焓,估算出其他溫度的汽化焓。除此之外,本文測(cè)定[MOEmim][NTf_2]和[EOMmim][NTf_2]離子液體極性δ_μ。同時(shí)分別估算兩種醚基咪唑離子液體的不同溫度的離子液體的汽化焓、汽化熵和Gibbs自由能。
[Abstract]:Hydrophobic ionic liquids 1 ethyl methyl ether 3 methyl imidazole bistrifluoromethyl sulfonimide ionic liquids and 1 ethyl ethyl ether 3 methyl imidazole bis 3 fluoromethyl sulfonic imide ionic liquids were synthesized in this paper.The 1H NMR spectra of the two ether-based imidazole ionic liquids and their corresponding intermediates, 1-ethylmethyl ether -3-methyl imidazolium bromide and 1-ethyl ethyl ether -3-methyl imidazolium bromide, were analyzed and characterized by 1H NMR and 13C NMR.The intermediate and the final product were determined to be the target ionic liquids.In the past studies, the enthalpy of vaporization of ionic liquids was determined by TGA method.The innovation of this paper is to use TG IR to measure the infrared spectra of the volatile gases in each constant temperature region under the same experimental conditions as the TG experiment.By comparing the infrared spectra obtained at different temperatures, it is proved that the ionic liquid does not decompose, and the decomposition temperature of the ionic liquid is inferred.Then using the TGA analysis method, through the constant temperature range of the loss of weight,The enthalpy of vaporization for measuring the mean temperature of ionic liquids. Verevkin et al. In his paper, it is proposed that the heat tolerance of ionic liquids in gaseous state and liquid state can be calculated on the basis of statistical thermodynamics.By calculating the gas and liquid heat tolerance of ionic liquids, the enthalpy of vaporization of ionic liquids calculated by TGA is converted to 298K, and the enthalpy of vaporization of other temperatures is estimated.In addition, the polarity 未 _ 渭 of [MOEmim] [NTf_2] and [EOMmim] [NTf_2] ionic liquids have been determined.At the same time, the enthalpy of vaporization, entropy of vaporization and Gibbs free energy of two kinds of ether-based imidazole ionic liquids at different temperatures were estimated respectively.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O645.1

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