Origin of heterogeneous dynamics in local molecular structures of ionic liquids

doi:10.1039/c6sm01797e

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Origin of heterogeneous dynamics in local molecular structures of ionic liquids
	Sha, ML; Liu, YS; Dong, HZ; Luo, FB; Jiang, FL; Tang, ZF; Zhu, GL; Wu, GZ; Sha, ML (reprint author), Hefei Normal Univ, Dept Chem & Chem Engn, Hefei 230061, Peoples R China.; Wu, GZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China.
	2016
发表期刊	SOFT MATTER
ISSN	1744-683X
卷号	12 期号:43 页码:8942-8949
文章类型	期刊论文
摘要	Room-temperature ionic liquids (ILs) are generally considered as structurally heterogeneous with inherent polar/apolar phase separation. However, even after a decade of research, local dynamics in the heterogeneous structures of ILs remain neglected. Such local dynamics may influence the ion transport of electrolytes, as well as the reaction rate of solvents. In this study, we performed molecular dynamics simulation to analyze the local dynamics for the structural heterogeneity of ILs. Calculations of the diffusion, reorientation, and association dynamics showed a distinct heterogeneous dynamics between the polar and apolar regions of ILs. Further studies demonstrated that such local dynamic differences originate from local structural heterogeneity. Different energy barriers determine a predominant fast reorientation dynamics in apolar regions and a locally vibrating behavior in polar regions. Additionally, we suggested a new jumping mechanism to clarify the dynamic heterogeneity of ions in the polar regions. The results will help determine the origin of the heterogeneous dynamics in IL local structures and provide a theoretical basis for tuning the dynamic properties of ILs used as electrolytes or reaction solvents.
DOI	10.1039/c6sm01797e
收录类别	SCI
语种	英语
WOS记录号	WOS:000387988400016
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/26591
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Sha, ML (reprint author), Hefei Normal Univ, Dept Chem & Chem Engn, Hefei 230061, Peoples R China.; Wu, GZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China.
推荐引用方式 GB/T 7714	Sha, ML,Liu, YS,Dong, HZ,et al. Origin of heterogeneous dynamics in local molecular structures of ionic liquids[J]. SOFT MATTER,2016,12(43):8942-8949.
APA	Sha, ML.,Liu, YS.,Dong, HZ.,Luo, FB.,Jiang, FL.,...&Wu, GZ .(2016).Origin of heterogeneous dynamics in local molecular structures of ionic liquids.SOFT MATTER,12(43),8942-8949.
MLA	Sha, ML,et al."Origin of heterogeneous dynamics in local molecular structures of ionic liquids".SOFT MATTER 12.43(2016):8942-8949.

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