雙碳醇水溶液的~1H NMR實(shí)驗(yàn)與理論分析(英文)
[Abstract]:The interaction between alcohols and water in ethanol aqueous solution and ethylene glycol aqueous solution at different temperatures was studied by 1H NMR and quantum chemical (QC) method. The experimental results show that the chemical shifts of water in two kinds of alcohol aqueous solutions show two different trends. With the increase of water content, the chemical shift of water in ethanol (ET) aqueous solution decreases sharply, while that in ethylene glycol (EG) aqueous solution increases slowly. With the increase of concentration, the resonance peak of hydroxy proton in two kinds of alcohol aqueous solution shifts to low field. At different temperatures, the alkyl proton resonance peaks of two kinds of alcohol aqueous solutions move monotonously to the low field with the increase of the concentration. The results of geometric structure optimization show that the formation of hydrogen bond between hydroxy proton and water ions weakens the O-H bond in alcohol, which leads to the increase of bond length. It is worth noting that the C-H bond of ET and EG is calculated by using density functional theory (DFT) (B3LYP) under the same polarization and diffusion. The bond length of C-C bond and O-H bond is larger than that calculated by HF theory. In contrast, ET and EG's O-H are obtained by using HF theory. The O bond strength is higher than that obtained by DFT (B3LYP) theory. The results of geometric configuration optimization are in agreement with the experimental results. In the calculation of NMR chemical shifts, DFT is superior to HF. in terms of the theoretical level mentioned in this paper. For the same theory, the larger the base set, the closer the calculated value is to the experimental value.
【作者單位】: 合肥工業(yè)大學(xué)汽車與交通工程學(xué)院;合肥工業(yè)大學(xué)電氣與自動(dòng)化工程學(xué)院;
【分類號(hào)】:O645.11
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 G.J.馬丹;;~(13)C和~(15)N化學(xué)位移的半經(jīng)驗(yàn)計(jì)算[J];化學(xué)通報(bào);1981年08期
2 劉春萬(wàn);曹懷貞;;稠環(huán)芳烴系列化合物化學(xué)位移的計(jì)算 Ⅳ.~1H化學(xué)位移加合性規(guī)律的量子力學(xué)基礎(chǔ)[J];化學(xué)學(xué)報(bào);1983年07期
3 朱永法;俄歇化學(xué)位移及其在表面化學(xué)上的應(yīng)用[J];物理化學(xué)學(xué)報(bào);1993年02期
4 顧洪恩,劉洪海,王克起,胡家泉,劉智,梁家昌;氙離子注入氯化鈉晶體零聲子躍遷和化學(xué)位移[J];光電子·激光;2001年06期
5 宋國(guó)強(qiáng);周炳南;吳吉安;;含有羰基和酚基共軛的體系中乙;瘜(duì)化學(xué)位移的影響[J];分子科學(xué)學(xué)報(bào);1983年04期
6 徐廣智,賴柱根,梁德聲,沈其豐,張建中;取代苯中環(huán)質(zhì)子的化學(xué)位移與取代基電子效應(yīng)間的定量關(guān)系[J];科學(xué)通報(bào);1982年09期
7 梁德聲;賴柱根;徐廣智;蔣明謙;;芳雜環(huán)衍生物中環(huán)質(zhì)子化學(xué)位移與取代基的關(guān)系[J];化學(xué)學(xué)報(bào);1982年01期
8 曹懷貞;劉春萬(wàn);;稠環(huán)芳烴系列化合物化學(xué)位移的計(jì)算 Ⅱ.甲基稠環(huán)芳烴甲基質(zhì)子化學(xué)位移的加合性[J];化學(xué)學(xué)報(bào);1982年06期
9 劉春萬(wàn);曹懷貞;;稠環(huán)芳烴系列化合物化學(xué)位移的計(jì)算——Ⅲ.稠環(huán)芳烴~(13)C化學(xué)位移的加合性[J];化學(xué)學(xué)報(bào);1982年08期
10 陳亮,胡玉仙,楊德明;利用~1H和~(13)C NMR研究α- 取代萘的取代效應(yīng)[J];波譜學(xué)雜志;1984年Z1期
相關(guān)會(huì)議論文 前2條
1 黃永仁;劉志翔;吳雁;;化學(xué)位移濾波的理論與實(shí)踐[A];第六屆全國(guó)波譜學(xué)學(xué)術(shù)會(huì)議論文摘要集[C];1990年
2 張建國(guó);許祿;;計(jì)算機(jī)輔助結(jié)構(gòu)解析—取代苯與吡啶芳碳化學(xué)位移預(yù)測(cè)[A];第四屆全國(guó)波譜學(xué)學(xué)術(shù)會(huì)議論文摘要集[C];1986年
相關(guān)碩士學(xué)位論文 前1條
1 陳碩;核磁共振研究飽和胺、醇的結(jié)構(gòu)與化學(xué)位移隨濃度變化規(guī)律[D];天津大學(xué);2014年
,本文編號(hào):2309299
本文鏈接:http://sikaile.net/kejilunwen/huaxue/2309299.html