Ana B.P. Silva, Ana R. Jesus, Daniela A.S. Agostinho, José M.S.S. Esperança, Alexandre Paiva, Ana R.C. Duarte, Patrícia M. Reis
{"title":"Using dicationic ionic liquids to upgrade the cytotoxicity and solubility of poorly water-soluble drugs","authors":"Ana B.P. Silva, Ana R. Jesus, Daniela A.S. Agostinho, José M.S.S. Esperança, Alexandre Paiva, Ana R.C. Duarte, Patrícia M. Reis","doi":"10.1016/j.jil.2023.100052","DOIUrl":"https://doi.org/10.1016/j.jil.2023.100052","url":null,"abstract":"<div><p>New dicationic ionic liquids (DcILs) based on carboxylic acid-derived, <em>N</em>-acetyl amino acid-derived or bromide anions, and ammonium cations were synthesized and characterized. DcILs were employed as co-solvents to improve the solubility of ibuprofen and ketoprofen belonging to BCS class II. These DcILs demonstrated to be less cytotoxic towards fibroblasts L929 cells and contributed to an augment in the solubility of both drugs when compared with monocationic ionic liquids (McILs). The cytotoxic profile of some of these ILs was established, and when the linker between two ammonium cations was an ether group or a short alkyl chain an IC<sub>50</sub> higher than 200 mM for fibroblasts L929 cells was achieved.</p><p>The anion structure showed to be a key factor in the solubility of both drugs, being the family of carboxylic acid-derived, the one that presented the most significant effect, followed by <em>N</em>-acetyl amino acid-derived and finally bromide. The two dimensional <sup>1</sup>H<sup>1</sup>H– NOESY NMR spectra showed the interaction between the IL and the two oral drugs, responsible for the improvement of their solubility. The lipophilicity (logP) of ibuprofen and ketoprofen reduced in the presence of these new DcILs.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"3 1","pages":"Article 100052"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50200921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vera Seidl , Michael Bosch , Ulrike Paap , Mattia Livraghi , Ziwen Zhai , Christian R. Wick , Thomas M. Koller , Peter Wasserscheid , Florian Maier , Ana-Sunčana Smith , Julien Bachmann , Hans-Peter Steinrück , Karsten Meyer
{"title":"Bis-polyethylene glycol-functionalized imidazolium ionic liquids: A multi-method approach towards bulk and surface properties","authors":"Vera Seidl , Michael Bosch , Ulrike Paap , Mattia Livraghi , Ziwen Zhai , Christian R. Wick , Thomas M. Koller , Peter Wasserscheid , Florian Maier , Ana-Sunčana Smith , Julien Bachmann , Hans-Peter Steinrück , Karsten Meyer","doi":"10.1016/j.jil.2022.100041","DOIUrl":"10.1016/j.jil.2022.100041","url":null,"abstract":"<div><p>Adding to the versatile class of ionic liquids, we report a new series of hydrophilic polyethylene glycol-functionalized room-temperature ionic liquids, offering interesting thermo- and electrochemical behavior as well as remarkable surface properties. A scalable and generally applicable synthetic procedure for the preparation of <em>N,N</em>’-<em>bis</em>(polyethylene glycol)imidazolium salts, generally abbreviated as [(mPEG<em><sub>n</sub></em>)<sub>2</sub>Im][A] (<em>n</em> = 2‒6, A = I<sup>‒</sup>, OMs<sup>‒</sup>, PF<sub>6</sub><sup>‒</sup>, NTf<sub>2</sub><sup>‒</sup>) was developed. These ionic liquids were studied concerning their thermo- and electrochemical properties, such as phase transition behavior, decomposition temperature, viscosity, and density, as well as electrical conductivity and electrochemical stability, using <em>i.a.</em> differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). Additionally, the surface properties were investigated by angle-resolved X-ray photoelectron spectroscopy (ARXPS) and the pendant drop method. Molecular dynamics simulations complement the studies and provide insight into the molecular structure of the ionic liquids and their specific orientation at the liquid-vacuum interface.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000258/pdfft?md5=6d915317e6758593873c0541d8248b83&pid=1-s2.0-S2772422022000258-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75133531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Deepak K. Pandey , Arnulf Materny , Johannes Kiefer , Dheeraj K. Singh
{"title":"Quantification of the interactions in halide-anion-based imidazolium ionic liquids","authors":"Deepak K. Pandey , Arnulf Materny , Johannes Kiefer , Dheeraj K. Singh","doi":"10.1016/j.jil.2022.100032","DOIUrl":"10.1016/j.jil.2022.100032","url":null,"abstract":"<div><p>Non-covalent interactions between constituent ions of ionic liquids (ILs) define their distinctive physicochemical properties and are critical for understanding their micro and bulk structures as well as designing new task-specific ILs. Therefore, the quantification of these interactions can improve our understanding of this unique class of materials. A set of 20 halide-anion-based imidazolium ILs (C<em><sub>n</sub></em>mim X, X = Cl, Br, I, and BF<sub>4</sub>; <em>n</em> = 2, 4, 6, 8, and 10) was selected for this study. The variation of the anion (hydrogen-bond-acceptor property and size), presence of water, and the alkyl chain length of the imidazolium ring have all been considered as parameters when attempting to address mainly the following two fundamental questions: How does the strength of hydrogen bonding in these selected Coulomb systems change? How much do dispersion forces play a role in the net attractive interaction energy despite being weak? To this end, dispersion-corrected density functional theory (DFT) computations were executed to acquire the optimized structures of all the considered ILs, followed by an ensemble of NCI and QATIM analyses to explore the strength of non-covalent interactions. Further, quantum mechanical energy decomposition analysis (QM-EDA) based on symmetry-adapted-perturbation-theory (SAPT) has been employed to dissect the total interaction energy into its components. An assessment of QM-EDA demonstrates that the electrostatic interaction dominates the intermolecular attraction, although induction and dispersion components also play a substantial role. The dispersion energies are amplified when water is present, as well as when anion size and alkyl chain length increase. We quantified the non-covalent interactions between ion pairs using NCI-RDG and Bader's QTAIM analyses. Strong hydrogen bonding with a partial covalent character was observed between monoatomic anions and C2-proton of the imidazolium ring, but for the multiatomic anion (BF<sub>4</sub><sup>−</sup>) and interaction between imidazolium ring alkyl groups and anions, a weak electrostatic hydrogen bonding was found. The hydrogen bonding strength decreases with increasing anion size; it is strongest in the C<sub>2</sub>mim Cl ion pair. NBO analysis gives a clear indication of <span><math><mrow><msub><mi>n</mi><mi>X</mi></msub><mo>→</mo><msubsup><mi>σ</mi><mrow><mi>C</mi><mo>−</mo><mi>H</mi></mrow><mo>*</mo></msubsup><mspace></mspace><mrow><mo>(</mo><mi>X</mi><mo>=</mo><mi>Cl</mi><mo>,</mo><mspace></mspace><mi>Br</mi><mo>,</mo><mspace></mspace><mi>I</mi><mo>,</mo><mspace></mspace><mrow><mi>and</mi></mrow><mspace></mspace><mi>F</mi><mo>)</mo></mrow></mrow></math></span> type intermolecular interaction with highest stabilization energy (<span><math><msubsup><mi>E</mi><mrow><mi>n</mi><mo>→</mo><mi>σ</mi><mo>*</mo></mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msubsup></math></span>). A clear correlation between <span><math><msup><mi>E</mi><","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000167/pdfft?md5=feae0d593ad5d9fcba02a6a53b20337e&pid=1-s2.0-S2772422022000167-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77055871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Thermophysical properties of 1-butyl-3-methylimidazolium octyl sulfate ionic liquid in aqueous and aqueous electrolyte solutions at different temperatures","authors":"Anuja Jain, Ankita S. Chandak, Sangesh P. Zodape","doi":"10.1016/j.jil.2022.100047","DOIUrl":"https://doi.org/10.1016/j.jil.2022.100047","url":null,"abstract":"<div><p>Understanding the molecular interaction of 1-butyl-3-methylimidazolium octyl sulfate i.e., [Bmim][OcOSO<sub>3</sub>] in water and in aqueous NaCl solution is important for fabricating the new process. As it is already known that ionic liquids along with inorganic salt NaCl have significant potential in the tribology of lubricants and salting-out media for the separation of nicotine. It is known that ionic liquids exhibit characteristic behavior at solid−liquid interfaces. Although it is believed that the structure of ionic liquids at the interface contributes to the tribological properties in the region of boundary-mixed lubrication, this contribution has not been clarified yet. Thus, we study the molecular interaction of the ionic liquid in aqueous and ionic liquid in aqueous NaCl solutions through the thermodynamic approach. We have measured density as an important parameter for 1-butyl-3-methylimidazolium octyl sulfate i.e., [Bmim][OcOSO<sub>3</sub>] in water and in aqueous NaCl solution within the concentration range of 0.04-0.12 mol/kg at different temperatures i.e. 293.15, 298.15, 303.15, 308.15, and 313.15 K and atmospheric pressure by using a densitometer (DSA5000M Anton Paar). The density (<span><math><mi>ρ</mi></math></span>) data were employed to measure some derived parameters such as apparent molar volume of solute (<span><math><msub><mi>V</mi><mi>ϕ</mi></msub></math></span>), limiting apparent molar volume of solute (<span><math><msubsup><mi>V</mi><mi>ϕ</mi><mn>0</mn></msubsup></math></span>), thermal expansion coefficient (<span><math><mi>α</mi></math></span>), apparent molar expansivity of solute at finite concentration <span><math><mrow><mo>(</mo><msub><mi>E</mi><mi>ϕ</mi></msub><mo>)</mo></mrow></math></span> and at infinite concentration <span><math><mrow><mo>(</mo><msubsup><mi>E</mi><mi>ϕ</mi><mn>0</mn></msubsup><mo>)</mo></mrow></math></span> and transfer volume <span><math><mrow><mo>(</mo><mrow><msub><mstyle><mi>Δ</mi></mstyle><mrow><mi>t</mi><mi>r</mi></mrow></msub><msubsup><mi>V</mi><mi>ϕ</mi><mn>0</mn></msubsup></mrow><mo>)</mo></mrow></math></span>. Results have been discussed in terms of all the possible molecular interactions in systems.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100047"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000313/pdfft?md5=daeea0bab30312d90dbbbafc5f022ad7&pid=1-s2.0-S2772422022000313-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72288221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. P. Khanh Ngo , E. Planes , C. Iojoiu , P. Soudant , A.-L. Rollet , P. Judeinstein
{"title":"Transport properties of alkali/alkaline earth cations in ionic-liquid based electrolytes","authors":"H. P. Khanh Ngo , E. Planes , C. Iojoiu , P. Soudant , A.-L. Rollet , P. Judeinstein","doi":"10.1016/j.jil.2022.100044","DOIUrl":"https://doi.org/10.1016/j.jil.2022.100044","url":null,"abstract":"<div><p>The increasing need of portable electrical resources requires to develop post-Li batteries, in which redox reactions are then based on the different alkali or earth alkaline ions. Keeping in mind the specific advantages of electrolytes based on ionic liquid (electrochemical properties, safety, stability …), this paper focuses on the specific properties of those obtained by mixing alkali or earth alkaline salts (Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup>, Cs<sup>+</sup> and Mg<sup>2+</sup>) in a prototypical ionic liquid, the 1-butyl-3-methyl imidazolium bis(trifluoromethyl sulfonyl) imide (BMImTFSI). Transport properties of these electrolytes are deciphered from viscosity, ionic conductivity and individual self-diffusion coefficients. At room temperature, change of electrolyte composition (nature of ion, concentration) induces some large variations of these transport properties. However, if these measurements are scaled towards glass transition temperatures, master curves are obtained with only slight differences between monovalent alkali and divalent earth alkaline ions. Further information is obtained from the Walden approach and evidences that these electrolytes are 'good ionic conductors'. These results are confirmed from self-diffusion coefficients which also allows to retrieve contributions of each species to ionic transport and then dissociation ratio inside these mixtures. Slight differences between alkali and earth alkali ions may be related to solvation mechanisms, as proposed from infrared spectroscopy measurements.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100044"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000283/pdfft?md5=9f618c30c5f32ef0e97bcf82f9d2b2af&pid=1-s2.0-S2772422022000283-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72288223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Loubna Najemi , Jean François Pilard , Mohammed Berrada
{"title":"Synthesis of Functionalized 1-cyclooctyl-3-methyl-1,2,3-triazolium via click chemistry and their polymerization by ROMP","authors":"Loubna Najemi , Jean François Pilard , Mohammed Berrada","doi":"10.1016/j.jil.2022.100042","DOIUrl":"10.1016/j.jil.2022.100042","url":null,"abstract":"<div><p>This paper describes the synthesis of a new ionic liquid (IL) monomer of 5-substituted cyclooctene 1,2,3-triazolium iodides salt via click chemistry, and an anion exchange reaction with two different counteranions: bis(trifluoromethylsulfonyl)imide [N(SO<sub>2</sub>CF<sub>3</sub>)<sub>2</sub>]<sup>−</sup>(NTf<sub>2</sub><sup>−</sup>), and hexafluorophosphate ([PF<sub>6</sub>]<sup>−</sup>). The structural properties of all monomers were determined by MALDI-TOF-MS, (<sup>1</sup>H; <sup>13</sup>C; <sup>19</sup>F;)NMR spectroscopy. 1,2,3-triazolium-based poly(ionic liquid)s (TPILs) with the pendant triazolium moieties were also synthesized by Ring-Opening Metathesis Polymerization (ROMP) using Grubbs second generation (Grubbs II) ruthenium as a catalyst with good control during the polymerization process and gave viscous solutions. The Synthesis of the polymers (TPILs) was confirmed by <sup>1</sup>HNMR spectroscopy. The thermal properties were characterized by thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The thermal stability of monomers was found to be high (∼286°C). Furthermore, monomers salts with [NTf<sub>2</sub><sup>−</sup>] have low melting points below 100°C (25-99°C), and their TPILs are viscous liquids at room temperature, with a low glass transition temperature (T<sub>g</sub> = -23°C). This result suggests that the 5-substituted cyclooctene 1,2,3-triazolium ionic liquid monomer offers high chain flexibility to the resulting polymers (TPILs). Hence this new class of IL monomer and TPILs may be potentially useful in electrolyte membrane applications.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277242202200026X/pdfft?md5=9c39d57c2d210cfd279bd375da65260f&pid=1-s2.0-S277242202200026X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83950758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anton A. Zabolotniy, Eugene N. Trush, Olga M. Zarechnaya, Vasilii A. Mikhailov
{"title":"Dicationic bis-imidazoliums as a platform for ionic liquids: Long tails and short spacers","authors":"Anton A. Zabolotniy, Eugene N. Trush, Olga M. Zarechnaya, Vasilii A. Mikhailov","doi":"10.1016/j.jil.2022.100045","DOIUrl":"https://doi.org/10.1016/j.jil.2022.100045","url":null,"abstract":"<div><p>A broad set of bis-imidazolium salts with long tails and short spacers (LTSS BIS) with odd and even number of carbons was synthesized and characterized with a number of experimental and computational methods, such as 1H and 13C NMR (2D techniques included), optical and electron microscopy, water content determinations, solubility in water assessments, melting points measurements, geometry and thermochemistry evaluation for model dications in PM6. Theoretically substantiated improvements for alkylimidazoles and bis-imidazolium dihalides synthesis have been proposed and experimentally verified. Good yields of LTSS BIS pure enough for physicochemical studies can be achieved in a fast and efficient manner, and factors essential for getting good results have been unveiled. The majority of LTSS BIS are prone to absorb water and retain it under usual conditions, but easily lose at heating. Large variety in crystal forms and thermal behavior of LTSS BIS subfamilies were found, depending mainly from spacer and anion. High thermal stability (more than 200°C) is typical for all LTSS BIS under study, but only a small part may be considered as a true ionic liquid. Fully stretched conformations were supposed for all alkyl fragments (tails and spacers) in solution, in accordance with experimental and computational results. Rotation around ordinary bonds is restricted only in 1,3-di(imidazolium-1-yl)-2-hydroxypropane dication, leading to unique four sorts of protons in three sp<sup>3</sup>-carbon chain. Due to specific structural features, bis-imidazolium salts cannot be represented as rod-like molecules. The concept of three principal structural motifs for LTSS BIS (U-shape, V-shape, and Z-shape) is proposed.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100045"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000295/pdfft?md5=cbf382f1ee3d5d2e486cdad39a7adb8d&pid=1-s2.0-S2772422022000295-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72288224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Green Hypergolic Ionic Liquids: Future Rocket Propellants","authors":"Umakant Swami, Neeraj Kumbhakarna, Arindrajit Chowdhury","doi":"10.1016/j.jil.2022.100039","DOIUrl":"10.1016/j.jil.2022.100039","url":null,"abstract":"<div><p>Hydrazine and its derivatives have been used as standard propellants for spacecraft propulsion systems since the 1960s, despite being highly toxic and carcinogenic. The propellant synthesis community has constantly been looking for green alternatives for the same. Hypergolic ionic liquids (HILs) with several attractive properties, such as high energy content, high bulk density, low vapor pressure, and low toxicity, have been proposed as an alternative to hydrazine and its derivatives. In the present study, the theoretical performance of sixty-eight HILs was studied at a combustion chamber pressure of 3 MPa and a nozzle expansion ratio of 40. The specific impulse and density specific impulse of the HILs were calculated with white fuming nitric acid (WFNA), inhibited red fuming nitric acid (IRFNA), and nitrogen tetroxide (NTO) as oxidizers. The specific impulse of 2,2-dimethyltriazanium nitrate (HIL-1) was found to be 23 s higher than monomethylhydrazine (MMH), whereas its density-specific impulse was found to be 123 g-s/cm<sup>3</sup> higher than MMH. The gains in the specific impulse and density specific impulse coupled with other desirable “green” properties for several HILs are expected to establish them as potential replacements for hydrazine and its derivatives.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100039"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000234/pdfft?md5=4947f722aed654f89743db537fcad47d&pid=1-s2.0-S2772422022000234-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81004335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"2-Ethylhexylsulfate Anion-based Surface-Active Ionic Liquids (SAILs) as temperature persistent electrolytes for supercapacitors","authors":"Preeti Jain , Oleg N. Antzutkin","doi":"10.1016/j.jil.2022.100034","DOIUrl":"https://doi.org/10.1016/j.jil.2022.100034","url":null,"abstract":"<div><p>We report on a comparative study of three novel non-halogenated surface-active ionic liquids (SAILs), which contain a surface-active anion, 2-ethylhexyl sulfate ([EHS]<sup>−</sup>), and phosphonium or imidazolium cations: tetrabutylphosphonium ([P<sub>4,4,4,4</sub>]<sup>+</sup>), trihexyl(tetradecyl)phosphonium ([P<sub>6,6,6,14</sub>]<sup>+</sup>), and 1-methyl-3-hexylimidazolium ([C<sub>6</sub>C<sub>1</sub>Im]<sup>+</sup>). Thermal and electrochemical properties i.e., ionic conductivities at different temperatures and electrochemical potential windows of these SAILs were thoroughly studied. SAIL's electrochemical performance as electrolytes was also examined in a multi-walled carbon nanotubes (MWCNT)-based supercapacitor over a wide range of temperatures from 253 to 373 K. We observed that the electrode material in the supercapacitor cell with [C<sub>6</sub>C<sub>1</sub>Im][EHS] as an electrolyte has a higher specific capacitance (<em>C<sub>elec</sub></em> in F g<sup>−1</sup>), a higher electric energy density (<em>E</em> in W h kg<sup>−1</sup>), and a higher electric power density (<em>P</em> in kW kg<sup>−1</sup>) as compared to the other studied SAILs, [P<sub>4,4,4,4</sub>][EHS], [P<sub>6,6,6,14</sub>][EHS] and [N<sub>8,8,8,8</sub>][EHS] (from our preceding study) in a temperature range from 253 to 373 K: At the scan rate of 2 mV s<sup>−1</sup> a supercapacitor cell with a MWCNT-based electrode and [C<sub>6</sub>C<sub>1</sub>Im][EHS], [P<sub>4,4,4,4</sub>][EHS] and [P<sub>6,6,6,14</sub>][EHS] as electrolytes has the specific capacitance, <em>C<sub>elec</sub></em> = 148, 90 and 47 F g<sup>−1</sup> and the energy density, <em>E</em> = 82, 50 and 26 W h kg<sup>−1</sup>, respectively, when measured at 298 K. For the named three SAILs at the scan rate of 2 mV s<sup>−1</sup>, a two- to three-fold increase in the specific capacitance and the energy density values was measured at 373 K: <em>C<sub>elec</sub></em> = 290, 198 and 114 F g<sup>−1</sup> and <em>E</em> = 161, 110 and 63 Wh kg<sup>−1</sup>, respectively. The solution resistance (<em>R<sub>s</sub></em>), charge transfer resistance (<em>R<sub>ct</sub></em>) and equivalent series resistance (ESR) all decreased two- to three-fold with an increase in temperature from 298 to 373 K. With the high specific capacitance and enhanced energy and power density and wider electrochemical potential window as compared to the molecular organic and aqueous electrolytes, these SAILs can be used for high-temperature electrochemical applications, such as high power and energy storage devices. In particular, up to now, [C<sub>6</sub>C<sub>1</sub>Im][EHS] and [P<sub>4,4,4,4</sub>][EHS] are the most appropriate candidates for such applications.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000180/pdfft?md5=c6a98a841efa8d318bd2358dcafaebc6&pid=1-s2.0-S2772422022000180-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137419518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Micellization studies of selected imidazolium based ionic liquid in aqueous solution and in presence of different additives: A review","authors":"Ramanjeet Kaur, Harsh Kumar, Meenu Singla","doi":"10.1016/j.jil.2022.100036","DOIUrl":"10.1016/j.jil.2022.100036","url":null,"abstract":"<div><p>Ionic Liquids commonly being referred to as designer solvents for the reason that they are accessible to have tailor-made properties by careful manipulation of both cation and anion, yet this approach still takes time and is also not cost-effective. Therefore, the use of ILs in the presence of appropriate additives is a typical way to circumvent the iterative synthesis and characterization process. Lately, Ionic Liquids are drawing massive attention in the field of research for their unique physicochemical properties. In addition to this, their self-organizing and micellization behaviour in aqueous as well as in the presence of different additives are quite useful in a variety of applications and they are economical as well. This review covers the various studies done by the researchers regarding the physicochemical properties of imidazolium based ILs in aqueous and in presence of different additives and also evaluated the various other interactions taking place between the ionic liquids and the additives which are leading their use in a variety of applications.</p></div>","PeriodicalId":100794,"journal":{"name":"Journal of Ionic Liquids","volume":"2 2","pages":"Article 100036"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772422022000209/pdfft?md5=909eef20d69960e4d504e45d712467bc&pid=1-s2.0-S2772422022000209-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73750501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}