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Molecules
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Ionic Liquids: From Theory to Applications
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Ionic Liquids: From Theory to Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Molecular Liquids".

Deadline for manuscript submissions: closed (15 November 2021) | Viewed by 4281

Special Issue Editors

Dr. Michela Simone

E-Mail Website
Guest Editor
Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
Interests: synthetic development; spectroscopy; medicinal chemistry; carbohydrate chemistry
Mr. Mahdi Ghorbani

E-Mail
Assistant Guest Editor
Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood 3125, VIC, Australia
Interests: ionic liquids; 2D nano materials

Special Issue Information

Dear Colleagues,

Ionic liquids (ILs) are defined as liquids entirely composed of ions, with the usual melting points lower than 100 oC. Since the first IL, ethylammonium nitrate, was discovered by Paul Walden in 1914, generations of ILs have been produced with innovative physical and chemical properties (for instance, high thermal and electrical conductivity, and low vapor pressure) compared to conventional solvents (such as flammability). In the last 10 years, this field has attracted considerable attention and has rapidly developed into a major scientific area in its own right. The study of ILs is highly interdisciplinary and, based on organic chemistry, it encompasses many disciplines, including physical chemistry, chemical engineering, materials science, chemical biology and environmental science.

ILs are currently emerging in industrial processes (such as 3D printing, lubricants, biomass processing) and their use will likely be further expanded. We welcome original contributions reporting on fundamental work, ranging from molecular dynamics simulations to applications of ILs, and including, but not limited to, the design of advanced materials, separation processes, electrochemical sensors, advanced batteries, fuel cells, dye-sensitized solar cells, the production of nano-materials, polymer science for preparation of porous and conductive polymers, biomass processing, and the extraction of heavy metals and in lubrication.

Dr. Michela Simone
Guest Editor

Mr. Mahdi Ghorbani
Assistant Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ionic liquids
  • green solvents
  • advanced electrolytes
  • catalysts
  • new lubricants
  • electrochemical sensors
  • ionic liquid extraction process

Published Papers (2 papers)

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Research

14 pages, 1860 KiB  
Article
Experimental and Mathematical Modelling of Factors Influencing Carbon Dioxide Absorption into the Aqueous Solution of Monoethanolamine and 1-Butyl-3-methylimidazolium Dibutylphosphate Using Response Surface Methodology (RSM)
by Fatin Nor Arissa Azhar, Mohd Faisal Taha, Siti Musliha Mat Ghani, Muhammad Syafiq Hazwan Ruslan and Noor Mona Md Yunus
Molecules 2022, 27(6), 1779; https://doi.org/10.3390/molecules27061779 - 08 Mar 2022
Cited by 3 | Viewed by 1361
Abstract
This paper investigated the solubility of carbon dioxide (CO2) in an aqueous solution of monoethanolamine (MEA) and 1-butyl-3-methylimidazolium dibutylphosphate ((BMIM)(DBP)) ionic liquid (IL) hybrid solvents. Aqueous solutions of MEA-(BMIM)(DBP) hybrid solvents containing different concentrations of (BMIM)(DBP) were prepared to exploit the [...] Read more.
This paper investigated the solubility of carbon dioxide (CO2) in an aqueous solution of monoethanolamine (MEA) and 1-butyl-3-methylimidazolium dibutylphosphate ((BMIM)(DBP)) ionic liquid (IL) hybrid solvents. Aqueous solutions of MEA-(BMIM)(DBP) hybrid solvents containing different concentrations of (BMIM)(DBP) were prepared to exploit the amine’s reactive nature, combined with the IL’s non-volatile nature for CO2 absorption. Response surface methodology (RSM) based on central composite design (CCD) was used to design the CO2 solubility experiments and to investigate the effects of three independent factors on the solubility of CO2 in the aqueous MEA-(BMIM)(DBP) hybrid solvent. The three independent factors were the concentration of (BMIM)(DBP) (0–20 wt.%), temperature (30 °C–60 °C) and pressure of CO2 (2–30 bar). The experimental data were fitted to a quadratic model with a coefficient of determination (R2) value of 0.9791. The accuracy of the developed model was confirmed through additional experiments where the experimental values were found to be within the 95% confidence interval. From the RSM-generated model, the optimum conditions for CO2 absorption in aqueous 30 wt% MEA-(BMIM)(DBP) were 20 wt% of (BMIM)(DBP), a temperature of 41.1 °C and a pressure of 30 bar. Full article
(This article belongs to the Special Issue Ionic Liquids: From Theory to Applications)
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10 pages, 1116 KiB  
Article
Unusual Lower Critical Solution Temperature Phase Behavior of Poly(benzyl methacrylate) in a Pyrrolidinium-Based Ionic Liquid
by Brian R. Carrick, Claire L. Seitzinger and Timothy P. Lodge
Molecules 2021, 26(16), 4850; https://doi.org/10.3390/molecules26164850 - 11 Aug 2021
Cited by 4 | Viewed by 2116
Abstract
Polymer/ionic liquid systems are being increasingly explored, yet those exhibiting lower critical solution temperature (LCST) phase behavior remain poorly understood. Poly(benzyl methacrylate) in certain ionic liquids constitute unusual LCST systems, in that the second virial coefficient (A2) in dilute solutions [...] Read more.
Polymer/ionic liquid systems are being increasingly explored, yet those exhibiting lower critical solution temperature (LCST) phase behavior remain poorly understood. Poly(benzyl methacrylate) in certain ionic liquids constitute unusual LCST systems, in that the second virial coefficient (A2) in dilute solutions has recently been shown to be positive, indicative of good solvent behavior, even above phase separation temperatures, where A2 < 0 is expected. In this work, we describe the LCST phase behavior of poly(benzyl methacrylate) in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide for three different molecular weights (32, 63, and 76 kg/mol) in concentrated solutions (5–40% by weight). Turbidimetry measurements reveal a strong concentration dependence to the phase boundaries, yet the molecular weight is shown to have no influence. The critical compositions of these systems are not accessed, and must therefore lie above 40 wt% polymer, far from the values (ca. 10%) anticipated by Flory-Huggins theory. The proximity of the experimental cloud point to the coexistence curve (binodal) and the thermo-reversibility of the phase transitions, are also confirmed at various heating and cooling rates. Full article
(This article belongs to the Special Issue Ionic Liquids: From Theory to Applications)
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