化学
离子液体
磺酰
酰亚胺
摩尔体积
三氟甲基
臼齿
稀释
碳酸丙烯酯
乙醚
物理化学
有机化学
无机化学
热力学
催化作用
烷基
物理
牙科
电极
电化学
医学
作者
Shuyi Wang,Xiaoyi Fu,Jingqi Wang,Yangyang Liu,Mingjun Zhao,Yanxia Qi,Qingshan Liu,Qiang Zheng
标识
DOI:10.1016/j.jct.2021.106638
摘要
Different groups have important influence on the interaction between molecules. In order to understand the effect of group introduction on the molecular interaction in solution, the densities of six diluted solutions including three ionic liquids (ILs) and two organic solvents were measured. The groups include methylene and methyl. The three ILs are 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([Emim][NTf2]), 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([Bmim][NTf2]), and 1-butyl-2,3-dimethylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([Bmmim][NTf2]). The organic solvents are diethyl carbonate (DEC) and propylene glycol monomethyl ether (PEGMME). The measured densities were used to calculate apparent molar volumes, Vϕ/cm3·mol-1, from 293.15 to 328.15 K with ± 0.02 K. Then, the fitting of infinite dilution apparent molar volumes, Vϕ0/cm3·mol-1, were obtained by using the calculated values of apparent molar volumes. The effects of different structures of ILs cations and organic solvents on the apparent molar volume, infinite dilution apparent molar volume, limiting apparent molar expansibility and thermal expansibility coefficient were discussed.
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