离子液体在水和有机物两相间可逆转移的调控
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- 英文论文题名：Tuning Hydrophilicity/Hydrophobicity of Cation and Anion for Reversible Phase Transfer of Ionic Liquids
- 论文作者：姚文惠 ; 王慧勇 ; 崔国凯 ; 李志勇 ; 王键吉
- 英文论文作者：Wenhui Yao ; Huiyong Wang ; Guokai Cui ; Zhiyong Li ; Jianji Wang ; School of Chemistry and Chemical Engineering ; Key Laboratory of Green Chemical Media and Reactions ; Ministry of Education ; Henan Normal University
- 年：2016
- 作者机构：河南师范大学化学化工学院绿色化学介质与反应教育部重点实验室;
- 论文关键词：离子液体 ; 可逆性 ; 相转移 ; 热响应 ; 控制剂
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十三分会：绿色化学
- 语种：中文
- 分类号：O645.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十三分会 ; 绿色化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：306k
- 原文格式：D
- 会议级别：全国
摘要
离子液体的相转移研究对实现催化剂和共催化剂的循环利用是非常重要的~([1-3])。本文通过调控阳离子及阴离子的亲水性/疏水性,设计、合成了一系列PEG功能化的离子液体,包括[PEG_(400)(mim)_2][NTf_2]_2、[PEG_(600)(mim)_2][NTf_2]_2、[PEG_(800)(mim)_2][NTf_2]_2、[PEG_(1000)(mim)_2][NTf_2]_2.通过体系温度的改变,离子液体[PEG_(800)(mim)_2][NTf_2]_2、[PEG_(1000)(mim)_2][NTf_2]_2能够在水和乙酸乙酯两相之间可逆地转移(如图1所示)。利用变温红外和变温核磁光谱技术研究了相转移的机理,结果表明,相转移是由于离子液体上PEG链的构像随温度的变化所引起的。另外,通过离子液体的这种相转移特性,以CuI和IL分别作为催化剂和共催化剂,能够高效调控叠氮和炔的环加成反应以及IL和CuI的循环利用。
The separation and recycling of catalyst and co-catalyst from products and solvents are of critical importance. In this work, a class of functionalized ionic liquids(ILs) were designed and synthesized. By tuning the hydrophilicity/hydrophobicity of cation and anion, these ILs could reversibly transfer between water and organics triggered by temperature. From a combination of multiple spectroscopic techniques, it was found that the driving force behind the transfer was mainly originated from the conformation change in PEG chain of the ILs upon temperature. Utilizing the novel property of this class of ILs, the green process of highly efficient and controllable Cu I-catalyzed cycloaddition reaction was achieved where ILs were used to entrain, activate and recycle the catalyst, and to control the reaction as well.
The separation and recycling of catalyst and co-catalyst from products and solvents are of critical importance. In this work, a class of functionalized ionic liquids(ILs) were designed and synthesized. By tuning the hydrophilicity/hydrophobicity of cation and anion, these ILs could reversibly transfer between water and organics triggered by temperature. From a combination of multiple spectroscopic techniques, it was found that the driving force behind the transfer was mainly originated from the conformation change in PEG chain of the ILs upon temperature. Utilizing the novel property of this class of ILs, the green process of highly efficient and controllable Cu I-catalyzed cycloaddition reaction was achieved where ILs were used to entrain, activate and recycle the catalyst, and to control the reaction as well.
引文
[1]Desset,S.L.;Cole-Hamilton,D.J.Angew.Chem.Int.Ed.2009,48:1472.
[2]Liu,G.;Wang,J.Angew.Chem.Int.Ed.2010,49:4425.
[3]Yang,Y.;Zhang,B.;Wang,Y.;Yue,L.;Li,W.;Wu,L.J.Am.Chem.Soc.2013,135:14500.
[2]Liu,G.;Wang,J.Angew.Chem.Int.Ed.2010,49:4425.
[3]Yang,Y.;Zhang,B.;Wang,Y.;Yue,L.;Li,W.;Wu,L.J.Am.Chem.Soc.2013,135:14500.
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