Journal
POLYHEDRON
Volume 27, Issue 15, Pages 3287-3293Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2008.07.029
Keywords
1-n-Butyl-3-methylimidazolium tetrafluoroborate; Aqueous solutions; Ionic liquid; Physico-chemical properties
Categories
Funding
- PRONEX/FAPERGS
- CNPq
- LAPPS UFRGS
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Physico-chemical properties of ionic liquids like density, viscosity, conductivity, surface tension and excess molar volume are strongly dependent on their concentration in aqueous solutions. 1-n-Butyl-3-methylimidazolium tetrafluoroborate/water solutions, at 25 degrees C, shows two clearly distinguished behaviors, corresponding to a water-rich and a salt-rich region, with distinct physico-chemical properties. It is shown that [BMIm][BF4] exhibits surfactant properties. The results obtained are discussed in terms of the interactions between cations and anions of the ionic liquid and the water molecule. IR studies show that the addition of water modifies the organization of the ionic liquid molecules. The data collection reported is helpful for a variety of different technological applications and in particular for electrochemical applications, as capacitors, batteries and fuel cells among others. (C) 2008 Elsevier Ltd. All rights reserved.
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