作者
Song Li, José Leobardo Bañuelos, Pengfei Zhang, Guang Feng, Sheng Dai, Gernot Rother, Peter T Cummings
发表日期
2014
期刊
Soft Matter
卷号
10
期号
45
页码范围
9193-9200
出版商
Royal Society of Chemistry
简介
The structural and dynamical properties of dicationic ionic liquids (DILs) [Cn(mim)2](Tf2N)2, that is, 3-methylimidazolium dications separated by an alkyl chain and with bis(trifluoromethylsulfonyl)amide as the anion, were investigated by molecular dynamics (MD) simulation in combination with small/wide-angle X-ray scattering (SWAXS) measurements. Enhanced spatial heterogeneity is observed as the DIL chain length is increased, characterized by the changes in the scattering and the increased heterogeneity order parameter (HOP). Temperature variation imposes only slight influences on the local structures of DILs compared to monocationic ionic liquids (MILs). The peaks at 0.9 Å−1 and 1.4 Å−1 of the structure function shift towards low Q as the temperature increases, in a similar manner to MILs, and changes in peak positions in response to temperature changes are reflected in HOP variations. However, the …
学术搜索中的文章
Toward understanding the structural heterogeneity and ion pair stability in dicationic ionic liquids
S Li, JL Bañuelos, P Zhang, G Feng, S Dai, G Rother… - Soft Matter, 2014