Air–liquid interface of ionic liquid+ H2O binary system studied by surface tension measurement and sum-frequency generation spectroscopy
Surface of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM] BF4)+ water mixture is
investigated using surface tension measurement and sum-frequency generation
spectroscopy. The liquid surface is mostly covered by the [BMIM]+ cations at very low bulk
concentration. An unusual increase in surface tension from mole fraction c≈ 0.016 up to≈
0.05 suggested that the BF4-anions start to appear at the surface from c≈ 0.016 until the
anions and cations are equally populated at c≈ 0.05 or higher. From the analysis of the …
investigated using surface tension measurement and sum-frequency generation
spectroscopy. The liquid surface is mostly covered by the [BMIM]+ cations at very low bulk
concentration. An unusual increase in surface tension from mole fraction c≈ 0.016 up to≈
0.05 suggested that the BF4-anions start to appear at the surface from c≈ 0.016 until the
anions and cations are equally populated at c≈ 0.05 or higher. From the analysis of the …
Air-liquid interface of ionic liquid-water binary system studied by surface tension measurement and sum-frequency generation spectroscopy
J Sung, T Iwahashi - APS March Meeting Abstracts, 2005 - ui.adsabs.harvard.edu
Surface of room-temperature ionic liquid (RIL)+ water mixture is investigated using surface
tension measurement and surface sum-frequency generation (SFG) vibrational
spectroscopy. Results indicate the liquid surface is mostly covered by the cations at a very
low bulk concentration (less than 0.02 bulk mole fraction). Increase of surface tension from
0.016 up to∼ 0.05 mole fraction suggested that the anions start to appear at the surface
from∼ 0.016 mole fraction until the anions and cations are equally populated at c∼ 0.05 or …
tension measurement and surface sum-frequency generation (SFG) vibrational
spectroscopy. Results indicate the liquid surface is mostly covered by the cations at a very
low bulk concentration (less than 0.02 bulk mole fraction). Increase of surface tension from
0.016 up to∼ 0.05 mole fraction suggested that the anions start to appear at the surface
from∼ 0.016 mole fraction until the anions and cations are equally populated at c∼ 0.05 or …