Revealing long-range density fluctuations in dialkylimidazolium chloride ionic liquids by dynamic light scattering
文献类型：期刊论文
| 作者 | Kuang, Qinglin; Zhang, Jun; Wang, Zhigang |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2007-08-23 |
| 卷号 | 111期号:33页码:9858-9863 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp071733+ |
| 英文摘要 | In this study, the structures and dynamics of ionic liquids of 1-allyl-3-methylimidazolium chloride ([AMIM][Cl]) and 1-n-butyl-3-methylimidazolium chloride ([BMIM][Cl]) were studied by dynamic light scattering with polarized and depolarized geometries in the temperature range from 300 to 400 K. The temperature range covered supercooled and liquid states for [BMIM][Cl] and covered the liquid state for [AMIM][Cl]. The results show that for these ionic liquids at all chosen temperatures only one ultraslow relaxation is observed in the polarized component of dynamic light scattering, however, the ultraslow relaxation is not observed in the depolarized component. The ultraslow relaxation exhibited several typical features of the "cluster" mode generally found in glass-forming liquids and polymer melts, such as diffusive, strongly scattering-vector-dependent, and nearly exponential characters, which thus corresponded to long-range density fluctuations. The physical origin for long-range density fluctuations was the existence of heterogeneities with large characteristic length scales in these ionic liquids. It was further considered that molecules of these ionic liquids not only tended to aggregate to form dynamic clusters but also possibly formed dynamic networks in the supercooled state and the heterogeneities could exist even at temperatures higher than the melting points. |
| 语种 | 英语 |
| WOS记录号 | WOS:000248759000023 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60441]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat,Key Lab Engn Plast, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kuang, Qinglin,Zhang, Jun,Wang, Zhigang. Revealing long-range density fluctuations in dialkylimidazolium chloride ionic liquids by dynamic light scattering[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2007,111(33):9858-9863. |
| APA | Kuang, Qinglin,Zhang, Jun,&Wang, Zhigang.(2007).Revealing long-range density fluctuations in dialkylimidazolium chloride ionic liquids by dynamic light scattering.JOURNAL OF PHYSICAL CHEMISTRY B,111(33),9858-9863. |
| MLA | Kuang, Qinglin,et al."Revealing long-range density fluctuations in dialkylimidazolium chloride ionic liquids by dynamic light scattering".JOURNAL OF PHYSICAL CHEMISTRY B 111.33(2007):9858-9863. |
入库方式： OAI收割
来源：化学研究所
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