标题:Aggregation behavior of 1-dodecyl-3-methylimidazolium bromide in aqueous solution: Effect of ionic liquids with aromatic anions
作者:Gu, Y.;Shi, L.;Cheng, X.;Lu, F.;Zheng, L.
作者机构:[Gu, Y] Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China;[ Shi, L] Key Laboratory of 更多
通讯作者:Zheng, L
通讯作者地址:[Zheng, LQ]Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China.
来源:Langmuir: The ACS Journal of Surfaces and Colloids
出版年:2013
卷:29
期:21
页码:6213-6220
DOI:10.1021/la400497r
关键词:Aggregation behavior;aqueous solution;aromatic anions
摘要:The effects of ionic liquids (ILs), 1-butyl-3-methylimidazolium methylsulfonate (bmimMsa), 1-butyl-3-methylimidazolium benzenesulfonate (bmimBsa), and 1-butyl-3-methylimidazolium 2-naphthalenesulfonate (bmimNsa), on the aggregation behavior of 1-dodecyl-3-methylimidazolium bromide (C _(12)mimBr) in aqueous solution were investigated by surface tension, dynamic light scattering measurements, and 1H NMR spectroscopy. The ability to promote the surfactant aggregation is in the order bmimNsa > bmimBsa > bmimMsa. Nevertheless, only bmimNsa distinctly reduces both the CMC value and the surface tension at CMC. Due to the penetration of C _(10)H_7SO_3 -anions into the surfactant aggregate, bmimNsa is found to induce a phase transition from micelles to vesicles, whereas the other ILs only slightly increase the sizes of micelles. The combined effect of intermolecular interactions, such as hydrophobic effect, electrostatic attractions, and π-π stacking interactions, is supposed to be responsible for this structural transformation, in which π-π stacking plays an important role.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:40
Scopus被引频次:40
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878278722&doi=10.1021%2fla400497r&partnerID=40&md5=0b7f8653f64014829a72b42cec0f4933
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