Journal ArticleDOI
Surface Propensity of Anions in a Binary Ionic-Liquid Mixture Assessed by Full-Range Angle-Resolved X-ray Photoelectron Spectroscopy and Surface-Tension Measurements.
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TLDR
This methodology provides a surface enrichment factor of the molecular ions and clearly serves as an experimental evidence for recently debated surface layering and/or island structure in ionic liquid systems.Abstract:
Angle-resolved X-ray photoelectron spectroscopy and contact-angle measurements guided by a signal attenuation model are utilized to extract molar composition and anion enrichment in the vacuum interface of a binary ionic liquid mixture, having a common quaternary ammonium cation and two different anions. By using the intensity ratio of the F1s peaks belonging to the two different anions recorded at the full electron take-off angle range, from 0° to 80°, we have determined that only a fractionally covered and anion enriched surface layer can predict the AR-XPS data, which is also consistent with surface tension measurements. Moreover, the more bulky and non-spherical anion enrichment is evident even at the conventional and the so assumed bulk sensitive take-off angle of 0°. This methodology provides a surface enrichment factor of the molecular ions and clearly serves as an experimental evidence for recently debated surface layering and/or island structure in ionic liquid systems.read more
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Surface tension of binary mixtures containing environmentally friendly ionic liquids: Insights from artificial intelligence
TL;DR: In this article, a new modeling method according to artificial neural network (ANN) disciplined by four optimization algorithms, namely teaching-based optimization (TLBO), particle swarm optimization (PSO), genetic algorithm (GA) and imperialist competitive algorithm (ICA), has been suggested to estimate the surface tension (ST) of binary ionic liquids (ILs) mixtures.
Journal ArticleDOI
Direct Correlation of Surface Tension and Surface Composition of Ionic Liquid Mixtures—A Combined Vacuum Pendant Drop and Angle-Resolved X-ray Photoelectron Spectroscopy Study
TL;DR: In this article , the surface tension and surface composition of various mixtures of the two ionic liquids (ILs) 1-methyl-3-octyl-imidazolium hexafluorophosphate [C8C1Im][PF6] and 1,3-bis(polyethylene glycol)imidaxolium iodide [(mPEG2)2Im]I in the temperature range from 230 to 370 K under ultraclean vacuum conditions were investigated.
Journal ArticleDOI
Structure and Surface Behavior of Rh Complexes in Ionic Liquids Studied Using Angle-Resolved X-ray Photoelectron Spectroscopy
TL;DR: In this paper , the surface composition and interfacial behavior of commercial [Rh(COD)2][TfO] in [C2C1Im]−-based ILs were studied.
References
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Journal ArticleDOI
Structure and nanostructure in ionic liquids.
Journal ArticleDOI
Application of Ionic Liquids to Energy Storage and Conversion Materials and Devices
Masayoshi Watanabe,Morgan L. Thomas,Shiguo Zhang,Kazuhide Ueno,Tomohiro Yasuda,Kaoru Dokko,Kaoru Dokko +6 more
TL;DR: Various application of ILs are reviewed by focusing on their use as electrolyte materials for Li/Na ion batteries, Li-sulfur batteries,Li-oxygen batteries, and nonhumidifiedfuel cells and as carbon precursors for electrode catalysts of fuel cells and electrode materials for batteries and supercapacitors.
Journal ArticleDOI
Biological Activity of Ionic Liquids and Their Application in Pharmaceutics and Medicine.
TL;DR: The accumulated data on the biological activity of ionic liquids, including their antimicrobial and cytotoxic properties, are discussed in view of possible applications in drug synthesis and drug delivery systems.
Journal ArticleDOI
Ions at the Air/Water Interface
TL;DR: In this article, the authors present results from theoretical studies of aqueous ionic solvation of alkali halides aimed at developing a microscopic description of structure and dynamics at the interface between air and saliency.
Journal ArticleDOI
Introduction: Ionic Liquids
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