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Abe H, Yoshiichi Y, Hirano T, Ohkubo T, Kishimura H. Hydrogen bonding of nanoconfined water in ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Dib N, Falcone RD, Acuña A, García-Río L. Ionic liquid-based reverse micelles. Use of hydrogen–deuterium exchange as a tool for surfactant self-assembly characterization. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Abe H, Yoshiichi Y, Kishimura H. Hydrogen/deuterium Exchange in 1-Alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide-based Solutions. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Lengvinaitė D, Kvedaraviciute S, Bielskutė S, Klimavicius V, Balevicius V, Mocci F, Laaksonen A, Aidas K. Structural Features of the [C4mim][Cl] Ionic Liquid and Its Mixtures with Water: Insight from a 1H NMR Experimental and QM/MD Study. J Phys Chem B 2021; 125:13255-13266. [PMID: 34806880 PMCID: PMC8667039 DOI: 10.1021/acs.jpcb.1c08215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/09/2021] [Indexed: 01/05/2023]
Abstract
The 1H NMR chemical shift of water exhibits non-monotonic dependence on the composition of an aqueous mixture of 1-butyl-3-methylimidazolium chloride, [C4mim][Cl], ionic liquid (IL). A clear minimum is observed for the 1H NMR chemical shift at a molar fraction of the IL of 0.34. To scrutinize the molecular mechanism behind this phenomenon, extensive classical molecular dynamics simulations of [C4mim][Cl] IL and its mixtures with water were carried out. A combined quantum mechanics/molecular mechanics approach based on the density functional theory was applied to predict the NMR chemical shifts. The proliferation of strongly hydrogen-bonded complexes between chloride anions and water molecules is found to be the reason behind the increasing 1H NMR chemical shift of water when its molar fraction in the mixture is low and decreasing. The model shows that the chemical shift of water molecules that are trapped in the IL matrix without direct hydrogen bonding to the anions is considerably smaller than the 1H NMR chemical shift predicted for the neat water. The structural features of neat IL and its mixtures with water have also been analyzed in relation to their NMR properties. The 1H NMR spectrum of neat [C4mim][Cl] was predicted and found to be in very reasonable agreement with the experimental data. Finally, the experimentally observed strong dependence of the chemical shift of the proton at position 2 in the imidazolium ring on the composition of the mixture was rationalized.
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Affiliation(s)
- Dovilė Lengvinaitė
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius LT-10257, Lithuania
| | | | - Stasė Bielskutė
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius LT-10257, Lithuania
| | - Vytautas Klimavicius
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius LT-10257, Lithuania
| | - Vytautas Balevicius
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius LT-10257, Lithuania
| | - Francesca Mocci
- Università
di Cagliari, Dipartimento di Scienze Chimiche e Geologiche, Cittadella
Universitaria di Monserrato, Cagliari I-09042, Monserrato, Italy
| | - Aatto Laaksonen
- Energy Engineering,
Division of Energy Science, Luleå
University of Technology, Luleå 97181, Sweden
- Division
of Physical Chemistry, Department of Materials and Environmental Chemistry,
Arrhenius Laboratory, Stockholm University, Stockholm 10691, Sweden
- Center of
Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry, Iasi 700469, Romania
- State
Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kęstutis Aidas
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius LT-10257, Lithuania
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5
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Shahkhatuni AA, Shahkhatuni AG, Mamyan SS, Ananikov VP, Harutyunyan AS. Proton-deuterium exchange of acetone catalyzed in imidazolium-based ionic liquid-D 2O mixtures. RSC Adv 2020; 10:32485-32489. [PMID: 35516517 PMCID: PMC9056620 DOI: 10.1039/d0ra04206d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 08/11/2020] [Indexed: 01/31/2023] Open
Abstract
The reaction of the proton–deuterium exchange of acetone in imidazolium-based ionic liquid (IL)–deuterium oxide mixtures was studied in detail via NMR spectroscopy. Certain ILs exhibit considerable catalytic properties and contribute to the course of reaction up to the complete deuteration. The efficiency of deuterium exchange crucially depends on the features of ILs; the type of anion and chain length of cation. The linear secondary isotope effects on the NMR chemical shifts of the 13C atoms in acetone were observed depending on the deuteration level of the molecule. The reaction of the proton–deuterium exchange of acetone in imidazolium-based ionic liquid (IL)–deuterium oxide mixtures was studied in detail via NMR spectroscopy.![]()
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Affiliation(s)
- Astghik A Shahkhatuni
- Molecule Structure Research Center, STCOPC NAS RA Azatutian Ave. 26 Yerevan 0014 Armenia
| | - Aleksan G Shahkhatuni
- Molecule Structure Research Center, STCOPC NAS RA Azatutian Ave. 26 Yerevan 0014 Armenia
| | - Suren S Mamyan
- Molecule Structure Research Center, STCOPC NAS RA Azatutian Ave. 26 Yerevan 0014 Armenia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky Prospect 47 Moscow 119991 Russian Federation
| | - Arpine S Harutyunyan
- Molecule Structure Research Center, STCOPC NAS RA Azatutian Ave. 26 Yerevan 0014 Armenia
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6
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Wang H, Cui J, Li H, Zhao Y, Wang J. The effect of cationic structure of ionic liquids on their interactions with 5-hydroxymethylfurfural. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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7
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Molecular and Segmental Orientational Order in a Smectic Mesophase of a Thermotropic Ionic Liquid Crystal. CRYSTALS 2018. [DOI: 10.3390/cryst9010018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We investigate conformational dynamics in the smectic A phase formed by the mesogenic ionic liquid 1-tetradecyl-3-methylimidazolium nitrate. Solid-state high-resolution 13C nuclear magnetic resonance (NMR) spectra are recorded in the sample with the mesophase director aligned in the magnetic field of the NMR spectrometer. The applied NMR method, proton encoded local field spectroscopy, delivers heteronuclear dipolar couplings of each 13C spin to its 1H neighbours. From the analysis of the dipolar couplings, orientational order parameters of the C–H bonds along the hydrocarbon chain were determined. The estimated value of the molecular order parameter S is significantly lower compared to that in smectic phases of conventional non-ionic liquid crystals.
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9
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Kristinaitytė K, Maršalka A, Dagys L, Aidas K, Doroshenko I, Vaskivskyi Y, Chernolevska Y, Pogorelov V, Valevičienė NR, Balevicius V. NMR, Raman, and DFT Study of Lyotropic Chromonic Liquid Crystals of Biomedical Interest: Tautomeric Equilibrium and Slow Self-Assembling in Sunset Yellow Aqueous Solutions. J Phys Chem B 2018; 122:3047-3055. [DOI: 10.1021/acs.jpcb.8b00350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Aru̅nas Maršalka
- Faculty of Physics, Vilnius University, Sauletekio al. 3, LT-10257 Vilnius, Lithuania
| | - Laurynas Dagys
- Faculty of Physics, Vilnius University, Sauletekio al. 3, LT-10257 Vilnius, Lithuania
| | - Kęstutis Aidas
- Faculty of Physics, Vilnius University, Sauletekio al. 3, LT-10257 Vilnius, Lithuania
| | - Iryna Doroshenko
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Glushkova Avenue 4, 03022 Kyiv, Ukraine
| | - Yevhenii Vaskivskyi
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Glushkova Avenue 4, 03022 Kyiv, Ukraine
| | - Yelyzaveta Chernolevska
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Glushkova Avenue 4, 03022 Kyiv, Ukraine
| | - Valeriy Pogorelov
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Glushkova Avenue 4, 03022 Kyiv, Ukraine
| | | | - Vytautas Balevicius
- Faculty of Physics, Vilnius University, Sauletekio al. 3, LT-10257 Vilnius, Lithuania
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Tzani A, Elmaloglou M, Kyriazis C, Aravopoulou D, Kleidas I, Papadopoulos A, Ioannou E, Kyritsis A, Voutsas E, Detsi A. Synthesis and structure-properties relationship studies of biodegradable hydroxylammonium-based protic ionic liquids. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.086] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Losada-Pérez P, Khorshid M, Renner FU. Interactions of Aqueous Imidazolium-Based Ionic Liquid Mixtures with Solid-Supported Phospholipid Vesicles. PLoS One 2016; 11:e0163518. [PMID: 27684947 PMCID: PMC5042501 DOI: 10.1371/journal.pone.0163518] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 09/09/2016] [Indexed: 11/22/2022] Open
Abstract
Despite the environmentally friendly reputation of ionic liquids (ILs), their safety has been recently questioned given their potential as cytotoxic agents. The fundamental mechanisms underlying the interactions between ILs and cells are less studied and by far not completely understood. Biomimetic films are here important biophysical model systems to elucidate fundamental aspects and mechanisms relevant for a large range of biological interaction ranging from signaling to drug reception or toxicity. Here we use dissipative quartz crystal microbalance QCM-D to examine the effect of aqueous imidazolium-based ionic liquid mixtures on solid-supported biomimetic membranes. Specifically, we assess in real time the effect of the cation chain length and the anion nature on a supported vesicle layer of the model phospholipid DMPC. Results indicate that interactions are mainly driven by the hydrophobic components of the IL, which significantly distort the layer and promote vesicle rupture. Our analyses evidence the gradual decrease of the main phase transition temperature upon increasing IL concentration, reflecting increased disorder by weakening of lipid chain interactions. The degree of rupture is significant for ILs with long hydrophobic cation chains and large hydrophobic anions whose behavior is reminiscent of that of antimicrobial peptides.
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Affiliation(s)
| | - Mehran Khorshid
- Institute for Materials Research IMO, Hasselt University, Diepenbeek, Belgium
| | - Frank Uwe Renner
- Institute for Materials Research IMO, Hasselt University, Diepenbeek, Belgium
- IMEC vzw, Associated lab IMOMEC, Diepenbeek, Belgium
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Easton ME, Ward AJ, Chan B, Radom L, Masters AF, Maschmeyer T. Factors influencing the formation of polybromide monoanions in solutions of ionic liquid bromide salts. Phys Chem Chem Phys 2016; 18:7251-60. [PMID: 26890026 DOI: 10.1039/c5cp06913k] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Six different bromide salts - tetraethylammonium bromide ([N2,2,2,2]Br, Br), 1-ethyl-1-methylpiperidinium bromide ([C2MPip]Br, Br), 1-ethyl-1-methylpyrrolidinium bromide ([C2MPyrr]Br, Br), 1-ethyl-3-methylimidazolium bromide ([C2MIm]Br, Br), 1-ethylpyridinium bromide ([C2Py]Br, Br), and 1-(2-hydroxyethyl)pyridinium bromide ([C2OHPy]Br, Br) - were studied in regards to their capacity to form polybromide monoanion products on addition of molecular bromine in acetonitrile solutions. Using complementary spectroscopic and computational methods for the examination of tribromide and pentabromide anion formation, key factors influencing polybromide sequestration were identified. Here, we present criteria for the targeted synthesis of highly efficient bromine sequestration agents.
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Affiliation(s)
- Max E Easton
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
| | - Antony J Ward
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
| | - Bun Chan
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
| | - Leo Radom
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
| | - Anthony F Masters
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
| | - Thomas Maschmeyer
- School of Chemistry F11, University of Sydney, New South Wales, Australia.
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Akram M, Anwar S, Ansari F, Bhat IA, Kabir-ud-Din KUD. Bio-physicochemical analysis of ethylene oxide-linked diester-functionalized green cationic gemini surfactants. RSC Adv 2016. [DOI: 10.1039/c5ra28129f] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
A novel series of oxy-diester-functionalized gemini surfactants (Cm-E2O-Cm) were synthesized and a comprehensive analysis of their biophysicochemical properties was carried out.
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Affiliation(s)
- Mohd. Akram
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Sana Anwar
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Farah Ansari
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
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14
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Pulsed-field gradient 1H NMR study of diffusion and self-aggregation of long-chain imidazolium-based ionic liquids. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.05.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Klimavicius V, Gdaniec Z, Balevicius V. Very short NMR relaxation times of anions in ionic liquids: new pulse sequence to eliminate the acoustic ringing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:879-883. [PMID: 24938418 DOI: 10.1016/j.saa.2014.04.140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/10/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
NMR relaxation processes of anions were studied in two neat imidazolium-based room temperature ionic liquids (RTILs) 1-decyl-3-methyl-imidazolium bromide- and chloride. The spin-lattice and spin-spin relaxations of 81Br and 35Cl nuclei were found to be extremely fast due to very strong quadrupolar interactions. The determined relaxation rates are comparable with those observed in the solids or in some critical organic solute/water/salt systems. In order to eliminate the acoustic ringing of the probe-head during relaxation times measurements the novel pulse sequence has been devised. It is based on the conventional inversion recovery pulse sequence, however, instead of the last 90° pulse the subsequence of three 90° pulses applied along axes to fulfill the phase cycling condition is used. Using this pulse sequence it was possible to measure T1 for both studied nuclei. The viscosity measurements have been carried out and the rotational correlation times were calculated. The effective 35Cl quadrupolar coupling constant was found to be almost one order lower than that for 81Br, i.e. 1.8 MHz and 16.0 MHz, respectively. Taking into account the facts that the ratio of (Q(35Cl)/Q(81Br))2≈0.1 and EFG tensors on the anions are quite similar, analogous structural organizations are expected for both RTILs. The observed T1/T2 (1.27-1.44) ratios were found to be not sufficiently high to confirm the presence of long-living (on the time scale of ≥10(-8) s) mesoscopic structures or heterogeneities in the studied neat ionic liquids.
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Affiliation(s)
- Vytautas Klimavicius
- Department of General Physics and Spectroscopy, Vilnius University, Sauletekio 9-3, LT-10222 Vilnius, Lithuania.
| | - Zofia Gdaniec
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Z. Noskowskiego 12/14, PL-61704 Poznan, Poland.
| | - Vytautas Balevicius
- Department of General Physics and Spectroscopy, Vilnius University, Sauletekio 9-3, LT-10222 Vilnius, Lithuania.
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16
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Synthesis and dilute aqueous solution properties of ester functionalized cationic gemini surfactants having different ethylene oxide units as spacer. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3233-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Schwenzer B, Kerisit SN, Vijayakumar M. Anion pairs in room temperature ionic liquids predicted by molecular dynamics simulation, verified by spectroscopic characterization. RSC Adv 2014. [DOI: 10.1039/c3ra46069j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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