| Dialkoxy functionalized quaternary ammonium ionic liquids as potential electrolytes and cellulose solvents | |
| Department | 绿色化学研究发展中心 |
Chen ZJ(陈正件); Liu SM(刘士民) ; Li ZP(李作鹏); Zhang QH(张庆华); Deng YQ(邓友全)
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| 2011 | |
| Source Publication | New J. Chem.
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| ISSN | 1144-0546 |
| Volume | 35Pages:1596-1606 |
| Abstract | A series of new ionic liquids, based on dialkoxy-functionalized quaternary ammonium cations {side chains: 1 = CH3, 1O1 = CH3OCH2, 1O2 = CH3OC2H4, 2O2 = C2H5OC2H4; cations: [N11,1O1,1O2], [N11,1O1,2O2], [N11,1O2,1O2], [N11,1O2,2O2] and [N11,2O2,2O2]}, with BF4_, (CF3SO2)2N_ (NTf2) and CH3CO2_ (OAc) as counteranions, have been prepared and characterized. Their basic properties, such as spectroscopic characteristics, melting point, glass transition temperature, thermal stability, electrochemical window, density, refractive index, viscosity and conductivity, were measured and comparatively studied. The incorporation of two flexible alkoxy chains makes the quaternary ammonium salts highly qualified to be low-viscous and high-conductive room temperature ILs, and even some of them have significantly better fluidity than the popular imidazolium ILs with a similar molecular weight, e.g. [N11,1O1,2O2]BF4 (151 cP and 2.11 mS cm_1, Mw: 249) vs. [HMIm]BF4 (220 cP and 1.2 mS cm_1, Mw: 256) at 25 1C. The electrochemical windows of these ILs were evaluated up to 5.5 V. In addition, the dialkoxy OAc ILs were found to have excellent solvent power for cellulose under mild conditions, e.g. a solution of 18 wt% microcrystalline cellulose in [N11,2O2,2O2]OAc at 80 ℃. By precipitation with water, the dissolved cellulose (I crystal structure) was regenerated as nanosized cellulose II particles with increased surface area and decreased crystallinity, determined by FE-SEM and XRD. |
| Subject Area | 物理化学 |
| Funding Organization | the National Natural Science Foundation of China (No. 20533080) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 绿色催化课题组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/2359 |
| Collection | 绿色化学研究发展中心 |
| Corresponding Author | Deng YQ(邓友全) |
| Recommended Citation GB/T 7714 | Chen ZJ,Liu SM,Li ZP,et al. Dialkoxy functionalized quaternary ammonium ionic liquids as potential electrolytes and cellulose solvents[J]. New J. Chem.,2011,35:1596-1606. |
| APA | 陈正件,刘士民,李作鹏,张庆华,&邓友全.(2011).Dialkoxy functionalized quaternary ammonium ionic liquids as potential electrolytes and cellulose solvents.New J. Chem.,35,1596-1606. |
| MLA | 陈正件,et al."Dialkoxy functionalized quaternary ammonium ionic liquids as potential electrolytes and cellulose solvents".New J. Chem. 35(2011):1596-1606. |
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