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McGrogan A, Lafferty J, O’Neill L, Brown L, Young JM, Goodrich P, Muldoon MJ, Moura L, Youngs S, Hughes TL, Gärtner S, Youngs TGA, Holbrey JD, Swadźba-Kwaśny M. Liquid Structure of Ionic Liquids with [NTf 2] - Anions, Derived from Neutron Scattering. J Phys Chem B 2024; 128:3220-3235. [PMID: 38520396 PMCID: PMC11000221 DOI: 10.1021/acs.jpcb.3c08069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 02/28/2024] [Accepted: 03/12/2024] [Indexed: 03/25/2024]
Abstract
The liquid structure of three common ionic liquids (ILs) was investigated by neutron scattering for the first time. The ILs were based on the bis(trifluoromethanesulfonyl)imide anion, abbreviated in the literature as [NTf2]- or [TFSI]-, and on the following cations: 1-ethyl-3-methylimidazolium, [C2mim]+; 1-decyl-3-methylimidazolium, [C10mim]+; and trihexyl(tetradecyl)phosphonium, [P666,14]+. Comparative analysis of the three ILs confirmed increased size of nonpolar nanodomains with increasing bulk of alkyl chains. It also sheds light on the cation-anion interactions, providing experimental insight into strength, directionality, and angle of hydrogen bonds between protons on the imidazolium ring, as well as H-C-P protons in [P666,14]+, to oxygen and nitrogen atoms in the [NTf2]-. The new Dissolve data analysis package enabled, for the first time, the analysis of neutron scattering data of ILs with long alkyl chains, in particular, of [P666,14][NTf2]. Results generated with Dissolve were validated by comparing outputs from three different models, starting from three different sets of cation charges, for each of the three ILs, which gave convergent outcomes. Finally, a modified method for the synthesis of perdeuterated [P666,14][NTf2] has been reported, with the aim of reporting a complete set of synthetic and data processing approaches, laying robust foundations that enable the study of the phosphonium ILs family by neutron scattering.
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Affiliation(s)
- Anne McGrogan
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Jack Lafferty
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Lauren O’Neill
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Lucy Brown
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - J. Mark. Young
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Peter Goodrich
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Mark J. Muldoon
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Leila Moura
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Sarah Youngs
- Rutherford
Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K.
| | | | - Sabrina Gärtner
- Rutherford
Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K.
| | | | - John D. Holbrey
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
| | - Małgorzata Swadźba-Kwaśny
- QUILL
Research Centre, Queen’s University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, Belfast, U.K.
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Yankova R, Tankov I. Cation-anion interaction effect on the nonlinear optical behavior of pyridinium-based ionic liquids. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120551. [PMID: 34742148 DOI: 10.1016/j.saa.2021.120551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/07/2021] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
Influence of the cation-anion interaction (expressed as internal hydrogen bonds) on the nonlinear optical properties (dipole moment, polarizability, anisotropy of polarizability and first-order hyperpolarizability) for the ionic liquids pyridinium hydrogen sulfate (PHS) and pyridinium bis(dihydrogen phosphate) (P2HP) was investigated in this paper. It was achieved analyzing vibrational modes (FT-IR) and electronic transitions (UV-vis) in PHS and P2HP. Molecular geometry of the title compounds was optimized by means of density functional theory calculations at B3LYP/6-311++G(2d,2p) level. Structural analysis exposed stronger internal hydrogen bonds (H7···O3 and H18···O4) between cationic and anionic fragments in the pyridinium hydrogen sulfate than these (H26···O4 and H25···O12) in pyridinium bis(dihydrogen phosphate). These observations are confirmed by FT-IR and UV-vis methods, where: (i) the infrared bands due to H···O and N-C interactions in P2HP appear at lower frequencies than the same ones in the spectrum of PHS and (ii) the n → π* electron transitions in PHS are more pronounced in comparison with these in P2HP. Based on the weaker cation-anion interaction in P2HP with respect to PHS, the former one is characterized with a remarkably higher first-order hyperpolarizability value. Hence, the ionic liquid P2HP was referred as a better nonlinear optical material than PHS.
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Affiliation(s)
- Rumyana Yankova
- University "Prof. Dr. Assen Zlatarov" Burgas, 8010, Bulgaria
| | - Ivaylo Tankov
- University "Prof. Dr. Assen Zlatarov" Burgas, 8010, Bulgaria.
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3
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Ozaki Y, Beć KB, Morisawa Y, Yamamoto S, Tanabe I, Huck CW, Hofer TS. Advances, challenges and perspectives of quantum chemical approaches in molecular spectroscopy of the condensed phase. Chem Soc Rev 2021; 50:10917-10954. [PMID: 34382961 DOI: 10.1039/d0cs01602k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The purpose of this review is to demonstrate advances, challenges and perspectives of quantum chemical approaches in molecular spectroscopy of the condensed phase. Molecular spectroscopy, particularly vibrational spectroscopy and electronic spectroscopy, has been used extensively for a wide range of areas of chemical sciences and materials science as well as nano- and biosciences because it provides valuable information about structure, functions, and reactions of molecules. In the meantime, quantum chemical approaches play crucial roles in the spectral analysis. They also yield important knowledge about molecular and electronic structures as well as electronic transitions. The combination of spectroscopic approaches and quantum chemical calculations is a powerful tool for science, in general. Thus, our article, which treats various spectroscopy and quantum chemical approaches, should have strong implications in the wider scientific community. This review covers a wide area of molecular spectroscopy from far-ultraviolet (FUV, 120-200 nm) to far-infrared (FIR, 400-10 cm-1)/terahertz and Raman spectroscopy. As quantum chemical approaches, we introduce several anharmonic approaches such as vibrational self-consistent field (VSCF) and the combination of periodic harmonic calculations with anharmonic corrections based on finite models, grid-based techniques like the Numerov approach, the Cartesian coordinate tensor transfer (CCT) method, Symmetry-Adapted Cluster Configuration-Interaction (SAC-CI), and the ZINDO (Semi-empirical calculations at Zerner's Intermediate Neglect of Differential Overlap). One can use anharmonic approaches and grid-based approaches for both infrared (IR) and near-infrared (NIR) spectroscopy, while CCT methods are employed for Raman, Raman optical activity (ROA), FIR/terahertz and low-frequency Raman spectroscopy. Therefore, this review overviews cross relations between molecular spectroscopy and quantum chemical approaches, and provides various kinds of close-reality advanced spectral simulation for condensed phases.
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Affiliation(s)
- Yukihiro Ozaki
- School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan. and Toyota Physical and Chemical Research Institute, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Krzysztof B Beć
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Yusuke Morisawa
- Department of Chemistry, School of Science and Engineering, Kindai University, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Shigeki Yamamoto
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Ichiro Tanabe
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Christian W Huck
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Thomas S Hofer
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, A6020 Innsbruck, Austria
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Atifi A, Baek DL, Fox RV. Electrodeposition of Dysprosium in pyrrolidinium triflate ionic liquid at ambient temperature: Unraveling system efficiency and impact of solvation interplays on the reduction process. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Su T, Tang Z, Yin C, Yang Y, Wang H, Peng L, Su Y, Su P, Li J. Insights into quaternary ammonium-based ionic liquids series with tetrafluoroborate anion for CO2 capture. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114857] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Ikeda T. Preparation of (2 × 4)-type tetra-PEG ion gels through Cu-free azide–alkyne cycloaddition. Polym J 2020. [DOI: 10.1038/s41428-020-0363-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Ionic liquids based on 1-ethyl-3-methylimidazolium cation and anions of tetrafluoroborate and bis(trifluoromethylsulfonyl)imide: Structural and thermodynamic properties by DFT study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112209] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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8
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Sanchora P, Pandey DK, Kagdada HL, Materny A, Singh DK. Impact of alkyl chain length and water on the structure and properties of 1-alkyl-3-methylimidazolium chloride ionic liquids. Phys Chem Chem Phys 2020; 22:17687-17704. [DOI: 10.1039/d0cp01686a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conformational isomerism in Cnmim Cl (n = 2, 4, 6, 8, and 10) is identified by marker IR bands for the first time.
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Affiliation(s)
- Paridhi Sanchora
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Deepak K. Pandey
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Hardik L. Kagdada
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Arnulf Materny
- Department of Physics and Earth Sciences
- Jacobs University Bremen
- Bremen
- Germany
| | - Dheeraj K. Singh
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
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9
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Amoli V, Kim JS, Jee E, Chung YS, Kim SY, Koo J, Choi H, Kim Y, Kim DH. A bioinspired hydrogen bond-triggered ultrasensitive ionic mechanoreceptor skin. Nat Commun 2019; 10:4019. [PMID: 31488820 PMCID: PMC6728325 DOI: 10.1038/s41467-019-11973-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 08/13/2019] [Indexed: 01/07/2023] Open
Abstract
Biological cellular structures have inspired many scientific disciplines to design synthetic structures that can mimic their functions. Here, we closely emulate biological cellular structures in a rationally designed synthetic multicellular hybrid ion pump, composed of hydrogen-bonded [EMIM+][TFSI-] ion pairs on the surface of silica microstructures (artificial mechanoreceptor cells) embedded into thermoplastic polyurethane elastomeric matrix (artificial extracellular matrix), to fabricate ionic mechanoreceptor skins. Ionic mechanoreceptors engage in hydrogen bond-triggered reversible pumping of ions under external stimulus. Our ionic mechanoreceptor skin is ultrasensitive (48.1-5.77 kPa-1) over a wide spectrum of pressures (0-135 kPa) at an ultra-low voltage (1 mV) and demonstrates the ability to surpass pressure-sensing capabilities of various natural skin mechanoreceptors (i.e., Merkel cells, Meissner's corpuscles, Pacinian corpuscles). We demonstrate a wearable drone microcontroller by integrating our ionic skin sensor array and flexible printed circuit board, which can control directions and speed simultaneously and selectively in aerial drone flight.
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Affiliation(s)
- Vipin Amoli
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Joo Sung Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Eunsong Jee
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Yoon Sun Chung
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - So Young Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Jehyoung Koo
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hanbin Choi
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Yunah Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Do Hwan Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
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10
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Singh DK, Donfack P, Rathke B, Kiefer J, Materny A. Interplay of Different Moieties in the Binary System 1-Ethyl-3-methylimidazolium Trifluoromethanesulfonate/Water Studied by Raman Spectroscopy and Density Functional Theory Calculations. J Phys Chem B 2019; 123:4004-4016. [DOI: 10.1021/acs.jpcb.9b00066] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dheeraj K. Singh
- Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
- Technische Thermodynamik, Universität Bremen, 28359 Bremen, Germany
- Department of Physics, Institute of Infrastructure Technology Research & Management, Ahmedabad 380026, India
| | - Patrice Donfack
- Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
| | - Bernd Rathke
- Technische Thermodynamik, Universität Bremen, 28359 Bremen, Germany
| | - Johannes Kiefer
- Technische Thermodynamik, Universität Bremen, 28359 Bremen, Germany
| | - Arnulf Materny
- Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
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12
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Brela MZ, Kubisiak P, Eilmes A. Understanding the Structure of the Hydrogen Bond Network and Its Influence on Vibrational Spectra in a Prototypical Aprotic Ionic Liquid. J Phys Chem B 2018; 122:9527-9537. [PMID: 30239203 DOI: 10.1021/acs.jpcb.8b05839] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Analysis of the hydrogen bond network in aprotic ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI) has been performed based on structures obtained from ab initio or classical molecular dynamics simulations. Statistics of different donor and acceptor atoms and the amount of chelating or bifurcated bonds has been presented. Most of the hydrogen bonds in EMIM-TFSI are formed with oxygen atoms as hydrogen acceptors; and the most probable bifurcated bonds are those with a mixed pair of oxygen and nitrogen acceptors. Spectral graph analysis has shown that the cations may form hydrogen bonds with up to five different anions and the connectivity of the whole hydrogen bond network is supported mainly by H-O bonds. In the structures of the liquid simulated via force field-based dynamics, the number of hydrogen bonds is smaller and fluorine atoms are the most favored hydrogen acceptors. One-dimensional potential energy profiles for hydrogen atom displacements and corresponding vibrational frequencies have been calculated for selected C-H bonds. Individual C-H stretching frequencies vary by 200-300 cm-1, indicating differences in local environment of hydrogen atoms forming C-H···O hydrogen bonds.
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Affiliation(s)
- Mateusz Z Brela
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Piotr Kubisiak
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Andrzej Eilmes
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
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13
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Probing effect of weak H-bonding on conformational change in ionic liquid: Experimental and DFT studies. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Effects of C(2) Methylation on Thermal Behavior and Interionic Interactions in Imidazolium-Based Ionic Liquids with Highly Symmetric Anions. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8071043] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Osaka N, Minematsu Y, Tosaka M. Influence of lithium salt-induced phase separation on thermal behaviors of poly(vinylidene fluoride)/ionic liquid gels and pore/void formation by competition with crystallization. RSC Adv 2018; 8:40570-40580. [PMID: 35557906 PMCID: PMC9091358 DOI: 10.1039/c8ra08514e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/15/2018] [Indexed: 11/23/2022] Open
Abstract
The thermal behavior of poly(vinylidene fluoride)/1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide/lithium bis(trifluoromethylsulfonyl)amide (PVDF/[C2mim][TFSA]/LiTFSA) gels, prepared by cooling from the hot solution, was investigated with various concentrations of LiTFSA (CLiTFSA). The peak melting temperature (Tm) of the gels shifted toward higher temperatures with increased CLiTFSA. However, the thickness of lamellar crystal was found to decrease with the increase in CLiTFSA, which meant that the increase in Tm was not caused by the thickening of lamellar crystal. Furthermore, we found the appearance of domains above Tm in the high CLiTFSA region (≥20 wt%), which was a lithium ion-rich phase caused by the phase separation. Therefore, it is considered on the basis of Nishi–Wang equation that an increase in the interaction parameter with increasing CLiTFSA toward the phase separation increased the Tm. The phase-separated domains competed with the subsequent crystallization, which resulted in the formation of micrometer-sized pores and nanometer-sized voids in the spherulites. Spectral measurements revealed that PVDF was not specifically solvated in the solution state above the crystallization temperature, while [TFSA]− anion formed a complex with lithium ion irrespective of the PVDF content. These results led to the consideration that an increase in the interaction parameter might be caused by the strong interaction between lithium ion and [TFSA]− anion to form the complex, which would also lower the interaction between PVDF and [TFSA]− anion. Lithium salt-induced phase separation on thermal behaviors of PVDF/ionic liquid gels and pore/void structures formation by competition with crystallization.![]()
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Affiliation(s)
- Noboru Osaka
- Department of Chemistry
- Faculty of Science
- Okayama University of Science
- Okayama 700-0005
- Japan
| | - Yuichi Minematsu
- Department of Chemistry
- Faculty of Science
- Okayama University of Science
- Okayama 700-0005
- Japan
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16
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Chen S, Di Y, Li T, Li F, Cao W. Impacts of ionic liquid capping on the morphology and photocatalytic performance of SbPO4 crystals. CrystEngComm 2018. [DOI: 10.1039/c8ce00790j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel hydrothermal route to prepare SbPO4 with [BMIM][PO4] or Na2HPO4·12H2O as the phosphorus source has been developed. The morphology transition of SbPO4 photocatalysts from microparticles to microspheres was shown by changing the reaction temperature.
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Affiliation(s)
- Shunqiang Chen
- College of Chemistry
- Key Lab of Environment Friendly Chemistry and Applications of Ministry of Education
- Xiangtan University
- Xiangtan
- China
| | - Yutong Di
- College of Chemistry
- Key Lab of Environment Friendly Chemistry and Applications of Ministry of Education
- Xiangtan University
- Xiangtan
- China
| | - Taohai Li
- College of Chemistry
- Key Lab of Environment Friendly Chemistry and Applications of Ministry of Education
- Xiangtan University
- Xiangtan
- China
| | - Feng Li
- College of Chemistry
- Key Lab of Environment Friendly Chemistry and Applications of Ministry of Education
- Xiangtan University
- Xiangtan
- China
| | - Wei Cao
- Nano and Molecular Systems Research Unit
- Faculty of Science
- University of Oulu
- Finland
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17
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Wheeler JL, Pugh M, Atkins SJ, Porter JM. Thermal Breakdown Kinetics of 1-Ethyl-3-Methylimidazolium Ethylsulfate Measured Using Quantitative Infrared Spectroscopy. APPLIED SPECTROSCOPY 2017; 71:2626-2631. [PMID: 28895753 DOI: 10.1177/0003702817727293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, the thermal stability of the room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO4]) is investigated using infrared (IR) spectroscopy. Quantitative IR absorption spectral data are measured for heated [EMIM][EtSO4]. Spectra have been collected between 25 ℃ and 100 ℃ using a heated optical cell. Multiple samples and cell pathlengths are used to determine quantitative values for the molar absorptivity of [EMIM][EtSO4]. These results are compared to previous computational models of the ion pair. These quantitative spectra are used to measure the rate of thermal decomposition of [EMIM][EtSO4] at elevated temperatures. The spectroscopic measurements of the rate of decomposition show that thermogravimetric methods overestimate the thermal stability of [EMIM][EtSO4].
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Affiliation(s)
- Jeffrey L Wheeler
- 1 Department of Mechanical Engineering, Colorado School of Mines, Golden, CO, USA
| | - McKinley Pugh
- 2 Department of Physics and Astronomy, Brigham Young University, Provo, UT, USA
| | - S Jake Atkins
- 3 Department of Physics and Engineering Physics, Central Connecticut State University, New Britain, CT, USA
| | - Jason M Porter
- 1 Department of Mechanical Engineering, Colorado School of Mines, Golden, CO, USA
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18
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Saqib N, Silva CJ, Maupin CM, Porter JM. A Novel Optical Diagnostic for In Situ Measurements of Lithium Polysulfides in Battery Electrolytes. APPLIED SPECTROSCOPY 2017; 71:1593-1599. [PMID: 28145749 DOI: 10.1177/0003702816684638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An optical diagnostic technique to determine the order and concentration of lithium polysulfides in lithium-sulfur (Li-S) battery electrolytes has been developed. One of the major challenges of lithium-sulfur batteries is the problem of polysulfide shuttling between the electrodes, which leads to self-discharge and loss of active material. Here we present an optical diagnostic for quantitative in situ measurements of lithium polysulfides using attenuated total reflection Fourier transform infrared (FT-IR) spectroscopy. Simulated infrared spectra of lithium polysulfide molecules were generated using computational quantum chemistry routines implemented in Gaussian 09. The theoretical spectra served as a starting point for experimental characterization of lithium polysulfide solutions synthesized by the direct reaction of lithium sulfide and sulfur. Attenuated total reflection FT-IR spectroscopy was used to measure absorption spectra. The lower limit of detection with this technique is 0.05 M. Measured spectra revealed trends with respect to polysulfide order and concentration, consistent with theoretical predictions, which were used to develop a set of equations relating the order and concentration of lithium polysulfides in a sample to the position and area of a characteristic infrared absorption band. The diagnostic routine can measure the order and concentration to within 5% and 0.1 M, respectively.
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Affiliation(s)
- Najmus Saqib
- 1 Mechanical Engineering Department, Colorado School of Mines, USA
| | - Cody J Silva
- 2 Department of Electrical and Computer Engineering, University of California Santa Barbara, USA
| | - C Mark Maupin
- 3 Chemical and Biological Engineering Department, Colorado School of Mines, USA
| | - Jason M Porter
- 1 Mechanical Engineering Department, Colorado School of Mines, USA
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Zhou Y, Zheng YZ, Zhang T, Deng G, Yu ZW. Evidence that Acetonitrile is Sensitive to Different Interaction Sites of Ionic Liquids as Revealed by Excess Spectroscopy. Chemphyschem 2017; 18:1370-1375. [DOI: 10.1002/cphc.201601376] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Yu Zhou
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
- Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles; School of Chemistry and Chemical Engineering; Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials; Laboratory of Fiber Materials and Modern Textiles, The Growing Base for State Key Laboratory; Qingdao University; Qingdao 266071 China
| | - Yan-Zhen Zheng
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
| | - Tian Zhang
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
| | - Geng Deng
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
| | - Zhi-Wu Yu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
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20
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Eilmes A, Kubisiak P, Brela M. Explicit Solvent Modeling of IR and UV–Vis Spectra of 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide Ionic Liquid. J Phys Chem B 2016; 120:11026-11034. [DOI: 10.1021/acs.jpcb.6b07994] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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
| | - Mateusz Brela
- Faculty of Chemistry, Jagiellonian University, Ingardena
3, 30-060 Kraków, Poland
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21
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Singh DK, Rathke B, Kiefer J, Materny A. Molecular Structure and Interactions in the Ionic Liquid 1-Ethyl-3-methylimidazolium Trifluoromethanesulfonate. J Phys Chem A 2016; 120:6274-86. [DOI: 10.1021/acs.jpca.6b03849] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dheeraj K. Singh
- Physics
and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
- Technische
Thermodynamik, Universität Bremen, 28359 Bremen, Germany
| | - Bernd Rathke
- Technische
Thermodynamik, Universität Bremen, 28359 Bremen, Germany
| | - Johannes Kiefer
- Technische
Thermodynamik, Universität Bremen, 28359 Bremen, Germany
| | - Arnulf Materny
- Physics
and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
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22
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Si D, Chen K, Yao J, Li H. Structures and Electronic Properties of Lithium Chelate-Based Ionic Liquids. J Phys Chem B 2016; 120:3904-13. [PMID: 27070194 DOI: 10.1021/acs.jpcb.6b00731] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The conformations, electronic properties, and interaction energies of four chelate-based ionic liquids [Li(EA)][Tf2N], [Li(HDA)][Tf2N], [Li(DEA)][Tf2N], and [Li(DOBA)][Tf2N] have been theoretically explored. The reliability of the located conformers has been confirmed via the comparison between the simulated and experimental infrared spectra. Our results show that the N-Li and O-Li coordinate bonds in cation are elongated as the numbers of coordinate heteroatoms of alkanolamine ligands to Li(+) increased. Also the binding energies between Li(+) and ligands are increased and the interaction energies between cations and Tf2N anion are decreased. The cation-anion interaction energies follow the order of [Li(DOBA)][Tf2N] < [Li(HDA)][Tf2N] < [Li(DEA)][Tf2N] < [Li(EA)][Tf2N], which fall within the energetic ranges of conventional ionic liquids. Interestingly, the strongest stabilization orbital interactions in these ionic liquids and their cations revealed by the natural bond orbital analysis lie in the interaction between the lone pair (LP) of the coordinate heteroatoms in ligands or anion as donors and the vacant valence shell nonbonding orbital (LP*) of Li(+) as acceptors, which are very different from that of conventional ionic liquids. Moreover, the charges transferred from cations to anion are quite similar, and the charge of Li(+) is proposed for possibly predicting the order of the interaction energies of ionic liquids in series. The present study allows for the deeper understanding the differences between chelate-based ionic liquids and conventional ionic liquids.
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Affiliation(s)
- Dawei Si
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University , Hangzhou 310027, P. R. China
| | - Kexian Chen
- College of Food and Biology Engineering, Zhejiang Gongshang University , Hangzhou, Zhejiang 310018, 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, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, P. R. China
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23
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Balci V, Uzun A. Understanding Spectroscopic Features of Trihexyltetradecylphosphonium Chloride. ChemistrySelect 2016. [DOI: 10.1002/slct.201600067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Volkan Balci
- Department of Chemical and Biological Engineering; Koç University; Rumelifeneri Yolu, Sariyer 34450 Istanbul Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM); Koç University; Rumelifeneri Yolu, Sariyer 34450 Istanbul Turkey
- TÜPRAŞ R&D Center; Korfez 41790 Kocaeli Turkey
| | - Alper Uzun
- Department of Chemical and Biological Engineering; Koç University; Rumelifeneri Yolu, Sariyer 34450 Istanbul Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM); Koç University; Rumelifeneri Yolu, Sariyer 34450 Istanbul Turkey
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24
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Voroshylova IV, Teixeira F, Costa R, Pereira CM, Cordeiro MNDS. Interactions in the ionic liquid [EMIM][FAP]: a coupled experimental and computational analysis. Phys Chem Chem Phys 2016; 18:2617-28. [DOI: 10.1039/c5cp06027c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IR spectroscopy and DFT calculations were combined to explore the anion conformers and access the hydrogen-bonding phenomenon in RTIL [EMIM][FAP].
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Affiliation(s)
- Iuliia V. Voroshylova
- CIQ(UP)
- Faculdade de Ciências da Universidade do Porto
- Departamento de Química e Bioquímica
- 4169-007 Porto
- Portugal
| | - Filipe Teixeira
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- 4169-007 Porto
| | - Renata Costa
- CIQ(UP)
- Faculdade de Ciências da Universidade do Porto
- Departamento de Química e Bioquímica
- 4169-007 Porto
- Portugal
| | - Carlos M. Pereira
- CIQ(UP)
- Faculdade de Ciências da Universidade do Porto
- Departamento de Química e Bioquímica
- 4169-007 Porto
- Portugal
| | - M. Natália D. S. Cordeiro
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- 4169-007 Porto
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25
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Tanabe I, Kurawaki Y, Morisawa Y, Ozaki Y. Electronic absorption spectra of imidazolium-based ionic liquids studied by far-ultraviolet spectroscopy and quantum chemical calculations. Phys Chem Chem Phys 2016; 18:22526-30. [DOI: 10.1039/c6cp02930b] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic absorption spectra of imidazolium-based ionic liquids were studied by far- and deep-ultraviolet spectroscopy and quantum chemical calculations.
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Affiliation(s)
- Ichiro Tanabe
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Yuji Kurawaki
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Yusuke Morisawa
- Department of Chemistry
- School of Science and Technology
- Kindai University
- Higashi-Osaka
- Japan
| | - Yukihiro Ozaki
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
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26
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Adsorption, Thermodynamic and Quantum Chemical Studies of 1-hexyl-3-methylimidazolium Based Ionic Liquids as Corrosion Inhibitors for Mild Steel in HCl. MATERIALS 2015. [PMCID: PMC5455723 DOI: 10.3390/ma8063607] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The inhibition of mild steel corrosion in 1 M HCl solution by some ionic liquids (ILs) namely, 1-hexyl-3-methylimidazolium trifluoromethanesulfonate [HMIM][TfO], 1-hexyl-3-methylimidazolium tetrafluoroborate [HMIM][BF4], 1-hexyl-3-methylimidazolium hexafluorophosphate [HMIM][PF6], and 1-hexyl-3-methylimidazolium iodide [HMIM][I] was investigated using electrochemical measurements, spectroscopic analyses and quantum chemical calculations. All the ILs showed appreciably high inhibition efficiency. At 303 K, the results of electrochemical measurements indicated that the studied ILs are mixed-type inhibitors. The adsorption studies showed that all the four ILs adsorb spontaneously on steel surface with [HMIM][TfO], [HMIM][BF4] and [HMIM][I] obeying Langmuir adsorption isotherm, while [HMIM][PF6] conformed better with Temkin adsorption isotherm. Spectroscopic analyses suggested the formation of Fe/ILs complexes. Some quantum chemical parameters were calculated to corroborate experimental results.
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27
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Hanke K, Kaufmann M, Schwaab G, Havenith M, Wolke CT, Gorlova O, Johnson MA, Kar BP, Sander W, Sanchez-Garcia E. Understanding the ionic liquid [NC4111][NTf2] from individual building blocks: an IR-spectroscopic study. Phys Chem Chem Phys 2015; 17:8518-29. [PMID: 25749545 DOI: 10.1039/c5cp00116a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study explores the interactions underlying the IR spectra of the ionic liquid [NC4111][NTf2] and its deuterated isotopomer [d9-NC4111][NTf2] by first isolating the spectra of charged ionic building blocks using mass-selective CIVP spectroscopy and then following the evolution of these bands upon sequential assembly of the ionic constituents. The spectra of the (1,1) and (2,2) neutral ion pairs are recorded using superfluid helium droplets as well as a solid neon matrix, while those of the larger charged aggregates are again obtained with CIVP. In general, the cluster spectra are similar to that of the bulk, with the (2,2) system displaying the closest resemblance. Analysis of the polarization-dependent band intensities of the neutral ion pairs in liquid droplets as a function of external electric field yields dipole moments of the neutral aggregates. This information allows a coarse assessment of the packing structure of the neutral pairs to be antiparallel at 0.37 K, in contrast to the parallel arrangement found for the assembly of small, high-dipole neutral molecules with large rotational constants (e.g., HCN). The role of an extra anion or cation attached to both the (1,1) and the (2,2) ion pairs to form the charged clusters is discussed in the context of an additional remote, more unfavorable binding site intrinsic to the nature of the charged IL clusters and as such not anticipated in the bulk phase. Whereas for the anion itself only the lowest energy trans conformer was observed, the higher clusters showed an additional population of the cis conformer. The interactions are found to be consistent with a minimal role of hydrogen bonding.
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Affiliation(s)
- Kenny Hanke
- Department of Physical Chemistry II, Ruhr-University Bochum, D-44801 Bochum, Germany.
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28
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Wang YL, Sarman S, Li B, Laaksonen A. Multiscale modeling of the trihexyltetradecylphosphonium chloride ionic liquid. Phys Chem Chem Phys 2015; 17:22125-35. [DOI: 10.1039/c5cp02586a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hierarchical trihexyltetradecylphosphonium cationic and chloride anionic models.
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Affiliation(s)
- Yong-Lei Wang
- System and Component Design
- Department of Machine Design
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - Sten Sarman
- Department of Materials and Environmental Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Bin Li
- Theoretical Chemistry
- Chemical Center
- Lund University
- SE-221 00 Lund
- Sweden
| | - Aatto Laaksonen
- Department of Materials and Environmental Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
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29
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Regeta K, Bannwarth C, Grimme S, Allan M. Free electrons and ionic liquids: study of excited states by means of electron-energy loss spectroscopy and the density functional theory multireference configuration interaction method. Phys Chem Chem Phys 2015; 17:15771-80. [DOI: 10.1039/c5cp01417d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collisions of slow electrons with ionic liquids and DFT/MRCI calculations reveal triplet states and interesting physics at low energies.
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Affiliation(s)
- Khrystyna Regeta
- Department of Chemistry
- University of Fribourg
- Fribourg
- Switzerland
| | - Christoph Bannwarth
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- 53115 Bonn
- Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- 53115 Bonn
- Germany
| | - Michael Allan
- Department of Chemistry
- University of Fribourg
- Fribourg
- Switzerland
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