Ionic liquids composed of linear amphiphilic anions: Synthesis, physicochemical characterization, hydrophilicity and interaction with carbon dioxide

Ionic liquids composed of linear amphiphilic anions: Synthesis, physicochemical characterization, hydrophilicity and interaction with carbon dioxide

Author Vieira, Michele O. Google Scholar
Monteiro, Wesley F. Google Scholar
Ligabue, Rosane Google Scholar
Seferin, Marcus Google Scholar
Chaban, Vitaly V. Autor UNIFESP Google Scholar
Andreeva, Nadezhda A. Google Scholar
do Nascimento, Jailton F. Google Scholar
Einloft, Sandra Google Scholar
Abstract Development of new task-specific ionic liquids (ILs) constitutes an important goal in chemistry and chemical technology. We hereby report four surface active ILs (SAILS) composed of the well-known cations (1-butyl-3methylimidazolium [bmim(+)], tetrabutylammonium [TBA(+)]) and long-alkyl-chain anions (lauryl sulfate [C12SO4-], lauryl ether sulfate [C12ESO4-]). Thermal stabilities, viscosities, interactions with water and polarized optical microscopy (POM) were investigated suggesting that new SAILs are highly viscous and thermally stable until 180 degrees C. [bmim][C12SO4], [bmim][CuESO4] and [TBA][C12ESO4] are miscible with water, whereas [TBA][C12SO4] is immiscible. Ab initio calculations were employed to characterize hydrophilicity/hydrophobicity balance of all four compounds, the results being in concordance with our experimental observations. [bmim][C12SO4] and [bmim][C12ESO4] normally exhibit non-Newtonian behaviors and form liquid crystals (LCs) with water, but [TBA][C12SO4] and [TBA][C12ESO4] are Newtonian liquids. Using semiempirical molecular dynamics simulations, we show that the sulfate group of the synthesized SAILs exhibits certain potential to capture dissolved CO2. (C) 2017 Elsevier B.V. All rights reserved.
Keywords Ionic liquids
Surfactant
Surface active ionic liquids
Amphiphilic anions, carbon dioxide
Language English
Sponsor Petrobras
CAPES
CNPq
Grant number Petrobras: 0050.0096056.15.9
Date 2017
Published in Journal Of Molecular Liquids. Amsterdam, v. 241, p. 64-73, 2017.
ISSN 0167-7322 (Sherpa/Romeo, impact factor)
Publisher Elsevier Science Bv
Extent 64-73
Origin http://dx.doi.org/10.1016/j.molliq.2017.06.006
Access rights Closed access
Type Article
Web of Science ID WOS:000407535000009
URI http://repositorio.unifesp.br/handle/11600/51346

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