1
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Bhowmick S, Filippov A, Khan IA, Shah FU. Physical and electrochemical properties of new structurally flexible imidazolium phosphate ionic liquids. Phys Chem Chem Phys 2022; 24:23289-23300. [PMID: 36156000 DOI: 10.1039/d2cp03022e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New structurally flexible 1-methyl- and 1,2-dimethyl-imidazolium phosphate ionic liquids (ILs) bearing oligoethers have been synthesized and thoroughly characterized. These novel ILs revealed high thermal stabilities, low glass transitions, high conductivity and wide electrochemical stability windows up to 6 V. Both the cations and anions of 1-methyl-imidazolium ILs diffuse faster than the ions of 1,2-dimethyl-imidazolium ILs, as determined by pulsed field gradient nuclear magnetic resonance (PFG-NMR). The 1-methyl-imidazolium phosphate ILs showed relatively higher ionic conductivities and ion diffusivity as compared with the 1,2-dimethyl-imidazolium phosphate ILs. As expected, the diffusivity of all the ions increases with an increase in the temperature. The 1-methyl-imidazolium phosphate ILs formed hydrogen bonds with the phosphate anions, the strength of which is decreased with increasing temperature, as confirmed by variable temperature 1H and 31P NMR spectroscopy. One of the representative IL, [EmDMIm][DEEP], presented promising elevated temperature performance as an electrolyte in a supercapacitor composed of multiwall carbon nanotubes and activated charcoal (MWCNT/AC) composite electrodes.
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Affiliation(s)
- Sourav Bhowmick
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Inayat Ali Khan
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Faiz Ullah Shah
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
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2
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Rothe M, Tress M, Allacher C, Nuernberger P, Kunz W. Ionic Liquids [M 3+ ][A - ] 3 with Three-Valent Cations and Their Possible Use to Easily Separate Rare Earth Metals. Chemistry 2021; 27:13052-13058. [PMID: 34196061 PMCID: PMC8518805 DOI: 10.1002/chem.202101925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Indexed: 02/03/2023]
Abstract
We introduce a simple way to liquify rare earth metals (REM) by incorporating the corresponding cations, in particular Eu3+, La3+, and Y3+, into polyvalent ionic liquids (ILs). In contrast to conventional methods, this is achieved not by transforming them into anionic complexes, but by keeping them as bare cations and combining them with convenient, cheap and commercially available anions (A) in the form [REM3+][A−]3. To do so, we follow the COncept of Melting Point Lowering due to EThoxylation (COMPLET) with alkyl polyethylene oxide carboxylates as anions. We provide basic properties, such as glass transition temperatures, viscosities, electrical conductivities, as well as water‐octanol partition constants P and show that these ILs have remarkably different properties, despite the similarity of their cations. In addition, we show that the ionic liquids possess interesting luminescent properties as non‐conventional fluorophores.
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Affiliation(s)
- Manuel Rothe
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Martin Tress
- Peter Debye Institute for Soft Matter Physics, Universität Leipzig, Linnéstraße 5, 04103, Leipzig, Germany
| | - Carina Allacher
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Patrick Nuernberger
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Werner Kunz
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
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3
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Khachatrian AA, Rakipov IT, Mukhametzyanov TA, Yakhvarov DG, Solomonov BN. Effect of cation structure on the formation of hydrogen bond between ionic liquids and solute molecules. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Rothe M, Müller E, Denk P, Kunz W. Ionic Liquids Based on the Concept of Melting Point Lowering Due to Ethoxylation. Molecules 2021; 26:molecules26134034. [PMID: 34279374 PMCID: PMC8271871 DOI: 10.3390/molecules26134034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/16/2022] Open
Abstract
Most of the commonly used Ionic Liquids (ILs) contain bulky organic cations with suitable anions. With our COMPLET (Concept of Melting Point Lowering due to Ethoxylation), we follow a different approach. We use simple, low-toxic, cheap, and commercially available anions of the type Cx(EO)yCH2COO- to liquefy presumably any simple metal ion, independently of its charge. In the simplest case, the cation can be sodium or lithium, but synthesis of Ionic Liquids is also possible with cations of higher valences such as transition or rare earth metals. Anions with longer alkyl chains are surface active and form surface active ionic liquids (SAILs), which combine properties of ionic and nonionic surfactants at room temperature. They show significant structuring even in their pure state, i.e., in the absence of water or any other added solvent. This approach offers new application domains that go far beyond the common real or hypothetical use of classical Ionic Liquids. Possible applications include the separation of rare earth metals, the use as interesting media for metal catalysis, or the synthesis of completely new materials (for example, in analogy to metal organic frameworks).
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5
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Physical-chemical properties of newly synthesized tetraalkylammonium alkyl ether carboxylate ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114947] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Shah FU, Gnezdilov OI, Khan IA, Filippov A, Slad NA, Johansson P. Structural and Ion Dynamics in Fluorine-Free Oligoether Carboxylate Ionic Liquid-Based Electrolytes. J Phys Chem B 2020; 124:9690-9700. [PMID: 33078951 PMCID: PMC7660752 DOI: 10.1021/acs.jpcb.0c04749] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/21/2020] [Indexed: 12/03/2022]
Abstract
Here, we investigate the physicochemical and electrochemical properties of fluorine-free ionic liquid (IL)-based electrolytes with two different cations, tetrabutylphosphonium, (P4,4,4,4)+, and tetrabutylammonium, (N4,4,4,4)+, coupled to a new anion, 2-[2-(2-methoxyethoxy)ethoxy]acetate anion (MEEA)-, for both neat and (P4,4,4,4)(MEEA) also doped with 10-40 mol % of Li(MEEA). We find relatively weaker cation-anion interactions in (P4,4,4,4)(MEEA) than in (N4,4,4,4)(MEEA), and for both ILs, the structural flexibility of the oligoether functionality in the anion results in low glass transition temperatures, also for the electrolytes made. The pulsed field gradient nuclear magnetic resonance (PFG NMR) data suggest faster diffusion of the (MEEA)- anion than (P4,4,4,4)+ cation in the neat IL, but the addition of a Li salt results in slightly lower mobility of the former than the latter and lower ionic conductivity. This agrees with the combined 7Li NMR and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy data, which unambiguously reveal preferential interactions between the lithium cations and the carboxylate groups of the IL anions, which also increased as a function of the lithium salt concentration. In total, these systems provide a stepping stone for further design of fluorine-free and low glass transition temperature IL-based electrolytes and also stress how crucial it is to control the strength of ion-ion interactions.
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Affiliation(s)
- Faiz Ullah Shah
- Chemistry
of Interfaces, Luleå University of
Technology, SE-971 87 Luleå, Sweden
| | - Oleg I. Gnezdilov
- Institute
of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Inayat Ali Khan
- Chemistry
of Interfaces, Luleå University of
Technology, SE-971 87 Luleå, Sweden
| | - Andrei Filippov
- Chemistry
of Interfaces, Luleå University of
Technology, SE-971 87 Luleå, Sweden
- Medical
and Biological Physics, Kazan Medical University, 420012 Kazan, Russia
| | - Natalia A. Slad
- Institute
of Polymers, Kazan National Research Technological
University, 420015 Kazan, Russia
| | - Patrik Johansson
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- ALISTORE-European
Research Institute, CNRS
FR 3104, Hub de l’Energie, 80039 Amiens, France
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Crivello C, Lazzara G, Chiappisi L. On the effect of the nature of counterions on the self-assembly of polyoxyethylene alkyl ether carboxylic acids. SOFT MATTER 2020; 16:7137-7143. [PMID: 32662480 DOI: 10.1039/d0sm00986e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this contribution, we investigate the effect of the type of counterion on the properties of dilute solutions of polyoxyethylene alkyl ether carboxylic acids. Two different surfactants, presenting an oleic acid alkyl chain and on-average five and nine ethylene oxide units, and terminated by a weakly anionic carboxymethyl group were studied. The surfactants were gradually ionized with sodium hydroxide, arginine, and choline hydroxide. The solutions properties were probed by light scattering, electrophoretic mobility, density and sound velocity measurements, as well as by small-angle neutron scattering. To our initial surprise, no specific effect arising from the nature of the counterion could be determined. We ascribe this phenomenon to the fact that the presence of the ethylene oxide units markedly dilutes the surfactant head group charge density, reducing counterion condensation and subsequent counterion specific effects.
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Affiliation(s)
- Chiara Crivello
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France. and Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France.
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8
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Köppe T, Jewell KS, Dietrich C, Wick A, Ternes TA. Application of a non-target workflow for the identification of specific contaminants using the example of the Nidda river basin. WATER RESEARCH 2020; 178:115703. [PMID: 32407929 DOI: 10.1016/j.watres.2020.115703] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/06/2020] [Accepted: 03/07/2020] [Indexed: 05/06/2023]
Abstract
Non-target screening of water samples from the Nidda river basin in central Germany was conducted with the goal to identify previously unknown chemical contaminants and their emission sources. The focus was on organic, water-borne contaminants which were not typical to municipal wastewater. Grab samples of river water from 13 locations on the Nidda and 15 of its tributaries, in sum 112 samples, were analysed with high resolution LC-QToF-MS/MS. To facilitate the identification of substances, features originating from the same compound such as adducts and isotopologues as well as in-source fragments and species with multiple charge states were registered and grouped by a componentization step utilizing both retention times and peak shapes of the features to combine them in a single component. This led to a reduction of the number of features by an average of 1235 per sample (46%). These grouped features were prioritized if these were detected only in specific tributaries or specific river sections, reducing the number of components by an average of 913 per sample (78%). In addition, grouped features were labelled as typically found in municipal wastewater by combining data from 16 wastewater treatment plants located across Germany and Switzerland and comparing this to components detected in the Nidda basin. These were removed, leading to a further reduction of components by an average of 72 per sample (30%) for an average total reduction of 2536 per sample (93%). Finally, nine compounds, with emission sources in three specific tributaries, were identified, including the textile additive Nylostab S-EED®, which was previously not known to be an environmental contaminant, as well as naturally occurring compounds such as highly toxic microcystins.
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Affiliation(s)
- Toni Köppe
- Federal Institute of Hydrology, Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Kevin S Jewell
- Federal Institute of Hydrology, Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Christian Dietrich
- Federal Institute of Hydrology, Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Arne Wick
- Federal Institute of Hydrology, Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Thomas A Ternes
- Federal Institute of Hydrology, Am Mainzer Tor 1, 56068, Koblenz, Germany.
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9
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Wang X, Zhang S, Yao J, Li H. The Polarity of Ionic Liquids: Relationship between Relative Permittivity and Spectroscopic Parameters of Probe. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00485] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xinyu Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P.R. China
| | - Songna Zhang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P.R. China
| | - Jia Yao
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P.R. China
| | - Haoran Li
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P.R. China
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P.R. China
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10
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11
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Müller E, Zahnweh L, Estrine B, Zech O, Allolio C, Heilmann J, Kunz W. Oligoether carboxylate counterions: An innovative way towards surfactant ionic liquids. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Black JJ, Dolan A, Harper JB, Aldous L. Kamlet–Taft solvent parameters, NMR spectroscopic analysis and thermoelectrochemistry of lithium–glyme solvate ionic liquids and their dilute solutions. Phys Chem Chem Phys 2018; 20:16558-16567. [DOI: 10.1039/c8cp02527d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
NMR, thermoelectrochemical and Kamlet–Taft solvochromatic analyses provide insight into the coordination of lithium in both dilute and concentrated lithium–glyme solutions.
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Affiliation(s)
| | - Andrew Dolan
- School of Chemistry
- UNSW Australia
- Sydney
- Australia
| | | | - Leigh Aldous
- School of Chemistry
- UNSW Australia
- Sydney
- Australia
- Department of Chemistry
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13
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Zappacosta R, Di Crescenzo A, Ettorre V, Fontana A, Pierini M, Siani G. Ionic Liquids as “Masking” Solvents of the Relative Strength of Bases in Proton Transfer Reactions. Chempluschem 2018; 83:35-41. [DOI: 10.1002/cplu.201700514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Romina Zappacosta
- Dipartimento di Farmacia; Università “G. d'Annunzio”; Via dei Vestini 31 66013 Chieti Italy
| | - Antonello Di Crescenzo
- Dipartimento di Farmacia; Università “G. d'Annunzio”; Via dei Vestini 31 66013 Chieti Italy
| | - Valeria Ettorre
- Dipartimento di Farmacia; Università “G. d'Annunzio”; Via dei Vestini 31 66013 Chieti Italy
| | - Antonella Fontana
- Dipartimento di Farmacia; Università “G. d'Annunzio”; Via dei Vestini 31 66013 Chieti Italy
| | - Marco Pierini
- Dipartimento di Chimica e Tecnologie del Farmaco; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro 5 00185 Roma Italy
| | - Gabriella Siani
- Dipartimento di Farmacia; Università “G. d'Annunzio”; Via dei Vestini 31 66013 Chieti Italy
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14
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Sharma G, Singh D, Rajamani S, Gardas RL. Influence of Alkyl Substituent on Optical Properties of Carboxylate-Based Protic Ionic Liquids. ChemistrySelect 2017. [DOI: 10.1002/slct.201701878] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gyanendra Sharma
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | - Dharmendra Singh
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | - Sunita Rajamani
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | - Ramesh L. Gardas
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
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15
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Gadilohar BL, Shankarling GS. Choline based ionic liquids and their applications in organic transformation. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.11.136] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Affiliation(s)
- Robert Hayes
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, NSW 2006, Sydney, Australia
| | - Rob Atkin
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
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18
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Affiliation(s)
- Vanderlei G. Machado
- Departamento
de Química, Universidade Federal de Santa Catarina, UFSC, Florianópolis, SC 88040-900, Brazil
| | - Rafaela I. Stock
- Departamento
de Química, Universidade Federal de Santa Catarina, UFSC, Florianópolis, SC 88040-900, Brazil
| | - Christian Reichardt
- Fachbereich
Chemie, Philipps-Universität, Hans-Meerwein-Strasse, 35032 Marburg, Germany
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19
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Chiappe C, Pomelli CS. Point-Functionalization of Ionic Liquids: An Overview of Synthesis and Applications. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402093] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Rengstl D, Fischer V, Kunz W. Low-melting mixtures based on choline ionic liquids. Phys Chem Chem Phys 2014; 16:22815-22. [DOI: 10.1039/c4cp02860k] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This scheme presents the melting points of the single components and the melting points of the produced mixtures.
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Affiliation(s)
- Doris Rengstl
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- D-93040 Regensburg, Germany
| | - Veronika Fischer
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- D-93040 Regensburg, Germany
| | - Werner Kunz
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- D-93040 Regensburg, Germany
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21
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Eilmes A, Kubisiak P. Quantum-Chemical and Molecular Dynamics Study of M+[TOTO]− (M = Li, Na, K) Ionic Liquids. J Phys Chem B 2013; 117:12583-92. [DOI: 10.1021/jp4070449] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrzej Eilmes
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland
| | - Piotr Kubisiak
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland
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22
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Kunz W, Zemb T, Harrar A. Using ionic liquids to formulate microemulsions: Current state of affairs. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2012.03.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Daschakraborty S, Biswas R. Stokes shift dynamics of [Na][TOTO] – A new class of ionic liquids: A comparative study with more common imidazolium analogs. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.07.042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Tang S, Baker GA, Zhao H. Ether- and alcohol-functionalized task-specific ionic liquids: attractive properties and applications. Chem Soc Rev 2012; 41:4030-66. [PMID: 22456483 PMCID: PMC3341508 DOI: 10.1039/c2cs15362a] [Citation(s) in RCA: 348] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, the designer nature of ionic liquids (ILs) has driven their exploration and exploitation in countless fields among the physical and chemical sciences. A fair measure of the tremendous attention placed on these fluids has been attributed to their inherent designer nature. And yet, there are relatively few examples of reviews that emphasize this vital aspect in an exhaustive or meaningful way. In this critical review, we systematically survey the physicochemical properties of the collective library of ether- and alcohol-functionalized ILs, highlighting the impact of ionic structure on features such as viscosity, phase behavior/transitions, density, thermostability, electrochemical properties, and polarity (e.g. hydrophilicity, hydrogen bonding capability). In the latter portions of this review, we emphasize the attractive applications of these functionalized ILs across a range of disciplines, including their use as electrolytes or functional fluids for electrochemistry, extractions, biphasic systems, gas separations, carbon capture, carbohydrate dissolution (particularly, the (ligno)celluloses), polymer chemistry, antimicrobial and antielectrostatic agents, organic synthesis, biomolecular stabilization and activation, and nanoscience. Finally, this review discusses anion-functionalized ILs, including sulfur- and oxygen-functionalized analogs, as well as choline-based deep eutectic solvents (DESs), an emerging class of fluids which can be sensibly categorized as semi-molecular cousins to the IL. Finally, the toxicity and biodegradability of ether- and alcohol-functionalized ILs are discussed and cautiously evaluated in light of recent reports. By carefully summarizing literature examples on the properties and applications of oxy-functional designer ILs up till now, it is our intent that this review offers a barometer for gauging future advances in the field as well as a trigger to spur further contemplation of these seemingly inexhaustible and--relative to their potential--virtually untouched fluids. It is abundantly clear that these remarkable fluidic materials are here to stay, just as certain design rules are slowly beginning to emerge. However, in fairness, serendipity also still plays an undeniable role, highlighting the need for both expanded in silico studies and a beacon to attract bright, young researchers to the field (406 references).
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Affiliation(s)
- Shaokun Tang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China
| | - Gary A. Baker
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA
| | - Hua Zhao
- Chemistry Program, Savannah State University, Savannah, GA 31404, USA
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25
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Fan M, Liang Y, Zhou F, Liu W. Dramatically improved friction reduction and wear resistance by in situ formed ionic liquids. RSC Adv 2012. [DOI: 10.1039/c2ra20888a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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