Fluorine-free and hydrophobic room-temperature ionic liquids, tetraalkylammonium bis(2-ethylhexyl)sulfosuccinates, and their ionic liquid-water two-phase properties
Fluorine-free and hydrophobic room-temperature ionic liquids, tetraalkylammonium bis(2-ethylhexyl)sulfosuccinates, and their ionic liquid-water two-phase properties
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DOI：
10.1039/b511529a
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发表时间：
2006-03
期刊：
影响因子：
9.8
通讯作者：
Naoya Nishi;T. Kawakami;F. Shigematsu;Masahiro Yamamoto;T. Kakiuchi
中科院分区：
文献类型：
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作者：
Naoya Nishi;T. Kawakami;F. Shigematsu;Masahiro Yamamoto;T. Kakiuchi
由双(2-乙基己基)琥珀酸磺酸盐(BEHSS)离子和对称的四烷基铵离子((CnH_2n+1)_4N~+；n=4~8)组成的无氟疏水室温离子液体(RTIL)由组成气溶胶OT®的表面活性阴离子组成。测定了水饱和RTIL的密度、电导率、粘度和与水(W)的互溶度等物理化学性质。对于n=5-8的RTIL，尽管水含量很高，但RTIL|W界面是极化的，在水饱和的RTIL中，水含量为3.6-8.9wt%。RTIL|W界面的极化势窗宽度与RTIL在W中的溶解度定量相关。RTIL-W两相体系不会自发乳化，在水饱和的RTIL中也不会形成反胶束，尽管BEHSS−在油水两相体系中能形成稳定的油包水乳状液和反胶束。
Fluorine-free and hydrophobic room-temperature ionic liquids (RTILs) composed of the bis(2-ethylhexyl)sulfosuccinate (BEHSS) ion, which is known as the surface-active anion constituting Aerosol OT®, and symmetric tetraalkylammonium ions ((CnH2n+1)4N+; n = 4–8), have been prepared. Physicochemical properties of the water-saturated RTILs such as density, conductivity, viscosity and mutual solubility with water (W) have been measured. The RTIL|W interface is polarizable for the RTILs with n = 5–8 in spite of the high water content, 3.6–8.9 wt% in the water-saturated RTILs. The width of the polarized potential window of the RTIL|W interfaces is quantitatively correlated with the solubility of the RTIL in W. The RTIL–W two-phase systems are not spontaneously emulsified and no reverse micelles are formed in the water-saturated RTILs, although BEHSS− is known to form stable water-in-oil emulsions and reverse micelles in oil–water two-phase systems.