Special Issue "Organometallic Ionic Liquid"

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Organometallic Chemistry".

Deadline for manuscript submissions: 30 April 2018

Special Issue Editor

Guest Editor
Prof. Dr. Mihkel Koel

Tallinn University of Technology; Ehitajate tee 5 19086 Tallinn, ESTONIA
Interests: ionic liquids; supercritical fluids; green analytical chemistry; catalysis; extraction; aerogels; ionogels

Special Issue Information

Dear Colleagues,

Ionic liquids (IL) are one of the most variable classes of compounds with very different physical and chemical properties. Using metal-containing anions as a structural component of ionic liquids has been common since the early days of research on ionic liquids. Metal-containing ionic liquids are regarded as materials that combine the properties of ionic liquids with additional intrinsic magnetic, spectroscopic, or catalytic properties, depending on the enclosed metal ion used.

Use of ILs spans over wide fields, from immobilizing solvent for metal catalysts and reaction media to catalysts, where ILs with metal-containing anions are active in diverse reactions. An ionic liquid in its liquid state is characterized by a highly- structured anion and cation net with a high degree of self-organization, which may favor a spontaneous, well-defined, and extended ordering of nanoscale structures. This phenomenon is increasingly being used for synthesizing different nanoparticles.

Metal-containing ILs, based on unique magnetic or spectroscopic properties, are gaining attention in the preparation of new sensors and analytical applications. Their electrical properties in several cases give new possibilities for the electrodeposition of metals that cannot be electrodeposited from traditional aqueous solutions.

However, more information is needed on the safety and environmental impacts relating to metal-containing ionic liquids in order to lower the barrier for their widespread industrial application.This Special Issue aims to highlight the structural and chemical diversity of organometallic ionic liquids and share the given extensive knowledge with a broader audience in order to assist this promising area to have a broader field of application.

Prof. Dr. Mihkel Koel
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 papers will be 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. Inorganics is an international peer-reviewed open access quarterly 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 550 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.


  • synthesis of metal containing ionic liquids
  • metal-containing ionic liquids
  • metal-containing eutectic-based ionic liquids
  • ordered nanostructures in ionic liquids
  • use of ionic liquids in extraction
  • catalysis with ionic liquids
  • electrochemistry with/in ionic liquids
  • metal plating in ionic liquids

Published Papers (1 paper)

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Open AccessArticle Effect of Water Content on Properties of Homogeneous [bmim]Fe(III)Cl4–H2O Mixtures and Their Application in Oxidative Absorption of H2S
Inorganics 2018, 6(1), 11; doi:10.3390/inorganics6010011
Received: 10 November 2017 / Revised: 22 December 2017 / Accepted: 3 January 2018 / Published: 8 January 2018
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The potential of 1-butyl-3-methylimidazolium tetrachloroferrate ([bmim]Fe(III)Cl4) for replacing an iron(III) chelate catalytic solution in the catalytic oxidation of H2S is attributed to its no side reaction and no degradation of the chelating agent. The catalytic oxidation product of water
[...] Read more.
The potential of 1-butyl-3-methylimidazolium tetrachloroferrate ([bmim]Fe(III)Cl4) for replacing an iron(III) chelate catalytic solution in the catalytic oxidation of H2S is attributed to its no side reaction and no degradation of the chelating agent. The catalytic oxidation product of water in non-aqueous [bmim]Fe(III)Cl4 possibly has an influence on the oxidative absorption of H2S. Water and hydrophobic [bmim]Fe(III)Cl4 mixtures at water volume percents from 40% to 70% formed separate phases after srirring, without affecting the oxidative absorption of hydrogen sulfide. Then, studies on the properties of homogeneous [bmim]Fe(III)Cl4–H2O mixtures at water volume percents in the range of 5.88–30% and above 80% reveal that these mixtures are both Brønsted and Lewis acids at vol % (H2O) ≤ 30%, and only Lewis acids at vol % (H2O) ≥ 80%. Raman spectra showed that [bmim]Fe(III)Cl4 was the dominating species at vol % (H2O) ≤ 30%, in contrast, [bmim]Fe(III)Cl4 decomposed into FeCl3·2H2O and [bmim]Cl at vol % (H2O) ≥ 80%. Further research on oxidative absorption of H2S by homogeneous [bmim]Fe(III)Cl4–H2O mixtures demonstrated that [bmim]Fe(III)Cl4 was reduced by H2S to [bmim]Fe(II)Cl4H and FeCl3·2H2O was reduced to FeCl2, at the same time, H2S was oxidized to S8. In addition, the decrease in acidity caused by increasing the water content increased the weight percent of absorbed H2S, and decreased volatile HCl emissions. However, it is difficult to prevent the suspended S8 generated at vol % (H2O) ≥ 80% from the formation of sulfur blockage. Therefore, oxidative absorption of H2S by [bmim]Fe(III)Cl4–H2O mixtures is feasible at vol % (H2O) < 80% without sulfur blockage. Full article
(This article belongs to the Special Issue Organometallic Ionic Liquid)

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