1
|
Philippi F, Goloviznina K, Gong Z, Gehrke S, Kirchner B, Pádua AAH, Hunt PA. Charge transfer and polarisability in ionic liquids: a case study. Phys Chem Chem Phys 2022; 24:3144-3162. [PMID: 35040843 DOI: 10.1039/d1cp04592j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The practical use of ionic liquids (ILs) is benefiting from a growing understanding of the underpinning structural and dynamic properties, facilitated through classical molecular dynamics (MD) simulations. The predictive and explanatory power of a classical MD simulation is inextricably linked to the underlying force field. A key aspect of the forcefield for ILs is the ability to recover charge based interactions. Our focus in this paper is on the description and recovery of charge transfer and polarisability effects, demonstrated through MD simulations of the widely used 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide [C4C1im][NTf2] IL. We study the charge distributions generated by a range of ab initio methods, and present an interpolation method for determining atom-wise scaled partial charges. Two novel methods for determining the mean field (total) charge transfer from anion to cation are presented. The impact of using different charge models and different partial charge scaling (unscaled, uniformly scaled, atom-wise scaled) are compared to fully polarisable simulations. We study a range of Drude particle explicitly polarisable potentials and shed light on the performance of current approaches to counter known problems. It is demonstrated that small changes in the charge description and MD methodology can have a significant impact; biasing some properties, while leaving others unaffected within the structural and dynamic domains.
Collapse
Affiliation(s)
- Frederik Philippi
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK
| | - Kateryna Goloviznina
- Laboratoire de Chimie, École Normale Supérieure de Lyon & CNRS, 69364 Lyon, France
| | - Zheng Gong
- Laboratoire de Chimie, École Normale Supérieure de Lyon & CNRS, 69364 Lyon, France
| | - Sascha Gehrke
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 4+6, D-53115 Bonn, Germany.,Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
| | - Agílio A H Pádua
- Laboratoire de Chimie, École Normale Supérieure de Lyon & CNRS, 69364 Lyon, France
| | - Patricia A Hunt
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK.,School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand.
| |
Collapse
|
2
|
Koutsoukos S, Philippi F, Malaret F, Welton T. A review on machine learning algorithms for the ionic liquid chemical space. Chem Sci 2021; 12:6820-6843. [PMID: 34123314 PMCID: PMC8153233 DOI: 10.1039/d1sc01000j] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/28/2021] [Indexed: 01/05/2023] Open
Abstract
There are thousands of papers published every year investigating the properties and possible applications of ionic liquids. Industrial use of these exceptional fluids requires adequate understanding of their physical properties, in order to create the ionic liquid that will optimally suit the application. Computational property prediction arose from the urgent need to minimise the time and cost that would be required to experimentally test different combinations of ions. This review discusses the use of machine learning algorithms as property prediction tools for ionic liquids (either as standalone methods or in conjunction with molecular dynamics simulations), presents common problems of training datasets and proposes ways that could lead to more accurate and efficient models.
Collapse
Affiliation(s)
- Spyridon Koutsoukos
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London White City Campus London W12 0BZ UK
| | - Frederik Philippi
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London White City Campus London W12 0BZ UK
| | - Francisco Malaret
- Department of Chemical Engineering, Imperial College London South Kensington Campus London SW7 2AZ UK
| | - Tom Welton
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London White City Campus London W12 0BZ UK
| |
Collapse
|
3
|
Philippi F, Welton T. Targeted modifications in ionic liquids - from understanding to design. Phys Chem Chem Phys 2021; 23:6993-7021. [PMID: 33876073 DOI: 10.1039/d1cp00216c] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ionic liquids are extremely versatile and continue to find new applications in academia as well as industry. This versatility is rooted in the manifold of possible ion types, ion combinations, and ion variations. However, to fully exploit this versatility, it is imperative to understand how the properties of ionic liquids arise from their constituents. In this work, we discuss targeted modifications as a powerful tool to provide understanding and to enable design. A 'targeted modification' is a deliberate change in the structure of an ionic liquid. This includes chemical changes in an experiment as well as changes to the parameterisation in a computer simulation. In any case, such a change must be purposeful to isolate what is of interest, studying, as far as is possible, only one concept at a time. The concepts can then be used as design elements. However, it is often found that several design elements interact with each other - sometimes synergistically, and other times antagonistically. Targeted modifications are a systematic way of navigating these overlaps. We hope this paper shows that understanding ionic liquids requires experimentalists and theoreticians to join forces and provides a tool to tackle the difficult transition from understanding to design.
Collapse
Affiliation(s)
- Frederik Philippi
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK.
| | | |
Collapse
|
4
|
Philippi F, Rauber D, Kuttich B, Kraus T, Kay CWM, Hempelmann R, Hunt PA, Welton T. Ether functionalisation, ion conformation and the optimisation of macroscopic properties in ionic liquids. Phys Chem Chem Phys 2020; 22:23038-23056. [PMID: 33047758 DOI: 10.1039/d0cp03751f] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquids are an attractive material class due to their wide liquid range, intrinsic ionic conductivity, and high chemical as well as electrochemical stability. However, the widespread use of ionic liquids is hindered by significantly higher viscosities compared to conventional molecular solvents. In this work, we show how the transport properties of ionic liquids can be altered significantly, even for isostructural ions that have the same backbone. To this end, structure-property relationships have been determined for a set of 16 systematically varied representative ionic liquids. Variations in molecular structure include ammonium vs. phosphonium, ether vs. alkyl side chains, and rigid vs. flexible anions. Ab initio calculations are used to relate molecular structures to the thermal, structural and transport properties of the ionic liquids. We find that the differences in properties of ether and alkyl functionalised ionic liquids are primarily dependent on minimum energy geometries, with the conformational flexibility of ether side chains appearing to be of secondary importance. We also show unprecedented correlations between anion conformational flexibility and transport properties. Critically, increasing fluidity upon consecutive introduction of ether side chains and phosphonium centres into the cation is found to be dependent on whether the anion is flexible or rigid. We demonstrate that targeted design of functional groups based on structure-property relationships can yield ionic liquids of exceptionally high fluidity.
Collapse
Affiliation(s)
- Frederik Philippi
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Conrad JA, Kim S, Gordon MS. Ionic liquids from a fragmented perspective. Phys Chem Chem Phys 2019; 21:16878-16888. [PMID: 31359024 DOI: 10.1039/c9cp02836f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The efficacy of using fragmentation methods, such as the effective fragment potential, the fragment molecular orbital and the effective fragment molecular orbital methods is discussed. The advantages and current limitations of these methods are considered, potential improvements are suggested, and a prognosis for the future is provided.
Collapse
Affiliation(s)
- Justin A Conrad
- Department of Chemistry, Iowa State University, Ames, IA 50014, USA.
| | - Shinae Kim
- Department of Chemistry, Iowa State University, Ames, IA 50014, USA.
| | - Mark S Gordon
- Department of Chemistry, Iowa State University, Ames, IA 50014, USA.
| |
Collapse
|
6
|
Abstract
Ionic liquids have a broad spectrum of applications ranging from gas separation to sensors and pharmaceuticals. Rational selection of the constituent ions is key to achieving tailor-made materials with functional properties. To facilitate the discovery of new ionic liquids for sustainable applications, we have created a virtual library of over 8 million synthetically feasible ionic liquids. Each structure has been evaluated for their-task suitability using data-driven statistical models calculated for 12 highly relevant properties: melting point, thermal decomposition, glass transition, heat capacity, viscosity, density, cytotoxicity, CO 2 solubility, surface tension, and electrical and thermal conductivity. For comparison, values of six properties computed using quantum chemistry based equilibrium thermodynamics COSMO-RS methods are also provided. We believe the data set will be useful for future efforts directed towards targeted synthesis and optimization.
Collapse
|
7
|
Meti MD, Dixit M, Hajari T, Tembe B. Ion pairing and preferential solvation of butylmethylimidazolium chloride ion pair in water-ethanol mixtures by using molecular dynamics simulations. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
8
|
The effect of substituents of phosphonium-based ionic liquids evaluated by MP2 calculation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Banerjee A, Shah JK. Insight into conformationally-dependent binding of 1- n-alkyl-3-methylimidazolium cations to porphyrin molecules using quantum mechanical calculations. Phys Chem Chem Phys 2019; 21:10095-10104. [DOI: 10.1039/c9cp01538h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first step in the biodegradation of imidazolium-based ionic liquids involves the insertion of the –OH group into the alkyl side chain, and it is believed to be triggered by cytochrome P450. In this work, we investigate the effect of conformations on binding energies of ionic liquid cations to the catalytic center of P450.
Collapse
Affiliation(s)
- Atiya Banerjee
- School of Chemical Engineering
- Oklahoma State University
- Stillwater
- USA
| | - Jindal K. Shah
- School of Chemical Engineering
- Oklahoma State University
- Stillwater
- USA
| |
Collapse
|
10
|
Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion. Carbohydr Polym 2018; 196:176-186. [DOI: 10.1016/j.carbpol.2018.05.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/20/2018] [Accepted: 05/03/2018] [Indexed: 11/21/2022]
|
11
|
Safinejad R, Mehdipour N, Eslami H. Atomistic reverse nonequilibrium molecular dynamics simulation of the viscosity of ionic liquid 1-n-butyl 3-methylimidazolium bis(trifluoromethylsulfonyl)imide [bmim][Tf 2N]. Phys Chem Chem Phys 2018; 20:21544-21551. [PMID: 30094445 DOI: 10.1039/c8cp02393j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The shear viscosity of room-temperature ionic liquid (IL) 1-n-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [bmim][Tf2N] is calculated over a temperature range 298-353 K, using the reverse nonequilibrium molecular dynamics simulation technique. The results of this work show that while the use of equilibrium molecular dynamics simulation techniques might be inefficient for viscosity calculations of ILs, the reverse nonequilibrium molecular dynamics technique is an efficient tool for this purpose. Our findings indicate that the shear rate for crossover from the Newtonian plateau to the shear thinning regime, corresponds to the relaxation time for the slowest microscopic scale motions, i.e., exchange of counterions in an ion's solvation shell (ion-pair relaxation time). The closeness of the time scales and activation energies for zero-shear-rate viscosities to the relaxation times and the corresponding activation energies for ion-pair formation/rupture, connects macroscopic dynamic properties with local atomic-level motions of the IL. The calculated viscosity coefficients and relaxation times for reorientations of the cation and anion as well as their corresponding activation energies are in very good agreement with experimental data.
Collapse
Affiliation(s)
- Rouhollah Safinejad
- Department of Chemistry, College of Sciences, Persian Gulf University, Boushehr 75168, Iran.
| | | | | |
Collapse
|
12
|
Wang J, Liu Y, Li W, Gao G. Prediction of 1H NMR chemical shifts for ionic liquids: strategy and application of a relative reference standard. RSC Adv 2018; 8:28604-28612. [PMID: 35548389 PMCID: PMC9084412 DOI: 10.1039/c8ra04822c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/04/2018] [Indexed: 11/21/2022] Open
Abstract
The computational predictions of 1H NMR chemical shifts for ionic liquids were investigated. To calculate the chemical shifts more accurately, the approach of relative reference standard (RRS) was proposed. This straightforward computational technique uses organic compounds and ionic liquids that are similar to the studied ionic liquids as standards. The calculated chemical shifts of single ion pairs were strongly influenced by the anion type and the local environment. Using the RRS methodology, the calculated results agreed well with the experimental chemical shifts due to the cancellation of errors caused by the anion. Ionic clusters consisting of 4 ion pairs were also employed to model the ionic liquids with strongly coordinating anions. Large clusters slightly improve the accuracy by reducing systematic errors. Although the experimental 1H NMR data of the reference ionic liquid should be used, the RRS methodology has been shown to predict 1H NMR chemical shifts efficiently at different levels of theory. Using an RRS method to calculate the 1H NMR chemical shifts of ionic liquid agreed well with the experimental value.![]()
Collapse
Affiliation(s)
- Juanfang Wang
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Ying Liu
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Wen Li
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Guanjun Gao
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| |
Collapse
|
13
|
Li Y, Yuan D, Wang Q, Li W, Li S. Accurate prediction of the structure and vibrational spectra of ionic liquid clusters with the generalized energy-based fragmentation approach: critical role of ion-pair-based fragmentation. Phys Chem Chem Phys 2018; 20:13547-13557. [DOI: 10.1039/c8cp00513c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The GEBF method with the ion-pair-based fragmentation has been developed to facilitate ab initio calculations of general ionic liquid clusters.
Collapse
Affiliation(s)
- Yunzhi Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Dandan Yuan
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Qingchun Wang
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Wei Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Shuhua Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| |
Collapse
|
14
|
Kuusik I, Berholts M, Kruusma J, Kisand V, Tõnisoo A, Lust E, Nõmmiste E. Valence electronic structure of [EMIM][BF4] ionic liquid: photoemission and DFT+D study. RSC Adv 2018; 8:30298-30304. [PMID: 35546846 PMCID: PMC9085424 DOI: 10.1039/c8ra05865b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/22/2018] [Indexed: 11/21/2022] Open
Abstract
The ultraviolet photoelectron spectrum (UPS) of the [EMIM][BF4] ionic liquid was recorded and analyzed. Together with the gas-phase UPS spectrum of the [EMIM][BF4] vapor and ab initio calculation methods, detailed insight into the electronic structure of this simple ionic liquid is possible. The low binding energy tail in the UPS spectrum is about 7.4 eV, in agreement with previous estimations of the HOMO–LUMO gap of the [EMIM][BF4] ion-pair. The bulk ab initio calculations are able to explain most of the features in the spectrum. However, DFT consistently lacks accuracy in the description of the top of the valence band. The dispersion corrected PBE calculation (PBE-D3) did offer very good agreement with the experimental structure, but the recently-developed vdW-DF functionals C09, optPBE, optB88 and CX were found to offer the best agreement in terms of the electronic structure. The ultraviolet photoelectron spectrum (UPS) of the [EMIM][BF4] ionic liquid was recorded and compared to previously measured vapor phase UPS spectrum.![]()
Collapse
Affiliation(s)
- I. Kuusik
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
| | - M. Berholts
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
- Dept. of Physics and Astronomy
| | - J. Kruusma
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - V. Kisand
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
| | - A. Tõnisoo
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
| | - E. Lust
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - E. Nõmmiste
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
| |
Collapse
|
15
|
Gehrke S, von Domaros M, Clark R, Hollóczki O, Brehm M, Welton T, Luzar A, Kirchner B. Structure and lifetimes in ionic liquids and their mixtures. Faraday Discuss 2018; 206:219-245. [DOI: 10.1039/c7fd00166e] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the aid of molecular dynamics simulations, we study the structure and dynamics of different ionic liquid systems.
Collapse
Affiliation(s)
- Sascha Gehrke
- Mulliken Center for Theoretical Chemistry
- University of Bonn
- D-53115 Bonn
- Germany
- Max Planck Institute for Chemical Energy Conversion
| | - Michael von Domaros
- Mulliken Center for Theoretical Chemistry
- University of Bonn
- D-53115 Bonn
- Germany
| | | | - Oldamur Hollóczki
- Mulliken Center for Theoretical Chemistry
- University of Bonn
- D-53115 Bonn
- Germany
| | - Martin Brehm
- Theoretical Chemistry
- Martin-Luther-University Halle-Wittenberg
- D-06108 Halle
- Germany
| | | | - Alenka Luzar
- Department of Chemistry
- Virginia Commonwealth University
- Richmond
- USA
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry
- University of Bonn
- D-53115 Bonn
- Germany
| |
Collapse
|
16
|
Zeman J, Uhlig F, Smiatek J, Holm C. A coarse-grained polarizable force field for the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:504004. [PMID: 29125468 DOI: 10.1088/1361-648x/aa99c4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present a coarse-grained polarizable molecular dynamics force field for the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm][PF6]). For the treatment of electronic polarizability, we employ the Drude model. Our results show that the new explicitly polarizable force field reproduces important static and dynamic properties such as mass density, enthalpy of vaporization, diffusion coefficients, or electrical conductivity in the relevant temperature range. In situations where an explicit treatment of electronic polarizability might be crucial, we expect the force field to be an improvement over non-polarizable models, while still profiting from the reduction of computational cost due to the coarse-grained representation.
Collapse
Affiliation(s)
- Johannes Zeman
- Institute for Computational Physics, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | | | | | | |
Collapse
|
17
|
Panda S, Kundu K, Umapathy S, Gardas RL. A Combined Experimental and Theoretical Approach to Understand the Structure and Properties ofN-Methylpyrrolidone-Based Protic Ionic Liquids. Chemphyschem 2017; 18:3416-3428. [DOI: 10.1002/cphc.201700886] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/17/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Somenath Panda
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | - Kaushik Kundu
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; Bangalore 560012 India
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; Bangalore 560012 India
| | - Ramesh L. Gardas
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| |
Collapse
|
18
|
Kandagal VS, Chen F, Jónsson E, Pringle JM, Forsyth M. Molecular simulation study of CO2 and N2 absorption in a phosphonium based organic ionic plastic crystal. J Chem Phys 2017; 147:124703. [DOI: 10.1063/1.4993654] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
19
|
Ionic Liquids for Supercapacitor Applications. Top Curr Chem (Cham) 2017; 375:63. [PMID: 28560657 DOI: 10.1007/s41061-017-0150-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 05/16/2017] [Indexed: 12/12/2022]
Abstract
Supercapacitors are electrochemical energy storage devices in which the charge is accumulated through the adsorption of ions from an electrolyte on the surface of the electrode. Because of their large ionic concentrations, ionic liquids have widely been investigated for such applications. The main properties that have to be optimized are the electrochemical window, the electrical conductivity, and the interfacial capacitances. Ionic liquids allow a significant improvement of the former, but they suffer from their high viscosity. In this review, I will discuss the advantages and the inconvenience of using ionic liquids in supercapacitors. Some innovative approaches using mixtures of ionic liquids or redox-active ions will also be critically addressed.
Collapse
|
20
|
Affiliation(s)
- Kun Dong
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaomin Liu
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Haifeng Dong
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiangping Zhang
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Suojiang Zhang
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| |
Collapse
|
21
|
Koller TM, Ramos J, Schulz PS, Economou IG, Rausch MH, Fröba AP. Thermophysical Properties of Homologous Tetracyanoborate-Based Ionic Liquids Using Experiments and Molecular Dynamics Simulations. J Phys Chem B 2017; 121:4145-4157. [DOI: 10.1021/acs.jpcb.6b12929] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Thomas M. Koller
- Department
of Chemical and Biological Engineering (CBI) and Erlangen Graduate
School in Advanced Optical Technologies (SAOT), University of Erlangen-Nuremberg, Paul-Gordan-Straße 6, 91052 Erlangen, Germany
| | - Javier Ramos
- Departamento
de Física Macromolecular, Instituto de Estructura de la Materia,
CSIC, BIOPHYM, Serrano 113bis, 28006 Madrid, Spain
| | - Peter S. Schulz
- Department
of Chemical and Biological Engineering (CBI), Institute of Chemical
Reaction Engineering, University of Erlangen-Nuremberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Ioannis G. Economou
- National Centre for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Molecular Thermodynamics and Modelling of Materials Laboratory,15310 Aghia Paraskevi Attikis, GR, Greece
- Chemical Engineering Program, Texas A&M University at Qatar, Education City, PO Box 23874, Doha, Qatar
| | - Michael H. Rausch
- Department
of Chemical and Biological Engineering (CBI) and Erlangen Graduate
School in Advanced Optical Technologies (SAOT), University of Erlangen-Nuremberg, Paul-Gordan-Straße 6, 91052 Erlangen, Germany
| | - Andreas P. Fröba
- Department
of Chemical and Biological Engineering (CBI) and Erlangen Graduate
School in Advanced Optical Technologies (SAOT), University of Erlangen-Nuremberg, Paul-Gordan-Straße 6, 91052 Erlangen, Germany
| |
Collapse
|
22
|
Izgorodina EI, Seeger ZL, Scarborough DLA, Tan SYS. Quantum Chemical Methods for the Prediction of Energetic, Physical, and Spectroscopic Properties of Ionic Liquids. Chem Rev 2017; 117:6696-6754. [PMID: 28139908 DOI: 10.1021/acs.chemrev.6b00528] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The accurate prediction of physicochemical properties of condensed systems is a longstanding goal of theoretical (quantum) chemistry. Ionic liquids comprising entirely of ions provide a unique challenge in this respect due to the diverse chemical nature of available ions and the complex interplay of intermolecular interactions among them, thus resulting in the wide variability of physicochemical properties, such as thermodynamic, transport, and spectroscopic properties. It is well understood that intermolecular forces are directly linked to physicochemical properties of condensed systems, and therefore, an understanding of this relationship would greatly aid in the design and synthesis of functionalized materials with tailored properties for an application at hand. This review aims to give an overview of how electronic structure properties obtained from quantum chemical methods such as interaction/binding energy and its fundamental components, dipole moment, polarizability, and orbital energies, can help shed light on the energetic, physical, and spectroscopic properties of semi-Coulomb systems such as ionic liquids. Particular emphasis is given to the prediction of their thermodynamic, transport, spectroscopic, and solubilizing properties.
Collapse
Affiliation(s)
- Ekaterina I Izgorodina
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Zoe L Seeger
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - David L A Scarborough
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Samuel Y S Tan
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| |
Collapse
|
23
|
Halat P, Seeger ZL, Barrera Acevedo S, Izgorodina EI. Trends in Two- and Three-Body Effects in Multiscale Clusters of Ionic Liquids. J Phys Chem B 2017; 121:577-588. [PMID: 27991797 DOI: 10.1021/acs.jpcb.6b10101] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Applications of higher correlated levels of ab initio theory to condensed systems require a significant amount of computational resources. The recent development of the fragment molecular orbital (FMO) approach alleviates this issue by splitting the system into individual fragments and achieves the accuracy of the method by accounting for all possible two-body and three-body interactions. In this work a comprehensive application of the FMO approach in combination with a second order of Møller-Plesset perturbation theory method, MP2, is presented for multiscale clusters of ionic liquids such as [C1mim]X, [C1mpyr]X, [C2py]X, and [NMe4]X, where X = chloride and tetrafluoroborates, BF4-, with the clusters varying in size from 4, 8, 16, to 32 ion pairs. Reliable cutoff criteria for the inclusion of two-body and three-body interactions are identified for both HF energy and MP2 correlation energy to achieve the desired accuracy of 1 kJ mol-1. The importance of two-body and three-body interactions in ionic liquids is also discussed.
Collapse
Affiliation(s)
- Peter Halat
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Zoe L Seeger
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Santiago Barrera Acevedo
- School of Mathematical Sciences, Monash University , 9 Rainforest Walk, Clayton, Victoria 3800., Australia
| | - Ekaterina I Izgorodina
- Monash Computational Chemistry Group, School of Chemistry, Monash University , 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| |
Collapse
|
24
|
Chen S, Ishii J, Horiuchi S, Yoshizawa-Fujita M, Izgorodina EI. Difference in chemical bonding between lithium and sodium salts: influence of covalency on their solubility. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp03009f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The current theoretical study explains the difference in solubility between lithium and sodium salts in ionic liquids due to increased covalency in lithium salts.
Collapse
Affiliation(s)
- Su Chen
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Jun Ishii
- Department of Materials and Life Sciences
- Sophia University
- Tokyo 102-8554
- Japan
| | - Shunsuke Horiuchi
- Department of Materials and Life Sciences
- Sophia University
- Tokyo 102-8554
- Japan
| | | | | |
Collapse
|
25
|
Tian T, Hu X, Guan P, Ding X. Research on solubility and bio-solubility of amino acids ionic liquids. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.11.071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
26
|
Harris KR. Can the Transport Properties of Molten Salts and Ionic Liquids Be Used To Determine Ion Association? J Phys Chem B 2016; 120:12135-12147. [DOI: 10.1021/acs.jpcb.6b08381] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kenneth R. Harris
- School of Physical, Environmental,
and Mathematical Sciences, University College, University of New South Wales, PO Box
7916, Canberra, BC ACT 2610, Australia
| |
Collapse
|
27
|
Ploss MA, Rutland MW, Glavatskih S. Influence of electric potential on the apparent viscosity of an ionic liquid: facts and artifacts. Phys Chem Chem Phys 2016; 18:26609-26615. [PMID: 27711405 DOI: 10.1039/c6cp02846b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
According to recent findings, the steady shear viscosity of the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][Tf2N]) decreases significantly under the influence of electric potential. This implies a causal connection between nanoscale ordering at the electrified interface and a macroscopic change of transport properties. To study this phenomenon in more detail, we reproduced the above-mentioned measurements; however, we find no evidence that the viscosity of [Emim][Tf2N] is a function of electric potential. Additionally, our results show that steady shear measurements can lead to artifacts that, at first glance, may appear to be potential-induced changes in viscosity. We demonstrate that the artifacts result from a sliding electrical contact at the working electrode of the electrochemical cell and we suggest to consider our findings for future viscosity measurements of ionic liquids.
Collapse
Affiliation(s)
- Moritz A Ploss
- System and Component Design, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Mark W Rutland
- Surface and Corrosion Science, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden. and Chemistry, Materials and Surfaces, Box 5607, SE-114 86 Stockholm, Sweden
| | - Sergei Glavatskih
- System and Component Design, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden and Mechanical Construction and Production, Ghent University, B-9000 Ghent, Belgium
| |
Collapse
|
28
|
Tan SYS, Izgorodina EI. Comparison of the Effective Fragment Potential Method with Symmetry-Adapted Perturbation Theory in the Calculation of Intermolecular Energies for Ionic Liquids. J Chem Theory Comput 2016; 12:2553-68. [DOI: 10.1021/acs.jctc.6b00141] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Samuel Y. S. Tan
- School of Chemistry, Monash University, 17 Rainforest
Walk, Clayton, Victoria 3800, Australia
| | - Ekaterina I. Izgorodina
- School of Chemistry, Monash University, 17 Rainforest
Walk, Clayton, Victoria 3800, Australia
| |
Collapse
|
29
|
Lage-Estebanez I, Ruzanov A, García de la Vega JM, Fedorov MV, Ivaništšev VB. Self-interaction error in DFT-based modelling of ionic liquids. Phys Chem Chem Phys 2016; 18:2175-82. [PMID: 26690957 DOI: 10.1039/c5cp05922d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The modern computer simulations of potential green solvents of the future, involving the room temperature ionic liquids, heavily rely on density functional theory (DFT). In order to verify the appropriateness of the common DFT methods, we have investigated the effect of the self-interaction error (SIE) on the results of DFT calculations for 24 ionic pairs and 48 ionic associates. The magnitude of the SIE is up to 40 kJ mol(-1) depending on the anion choice. Most strongly the SIE influences the calculation results of ionic associates that contain halide anions. For these associates, the range-separated density functionals suppress the SIE; for other cases, the revPBE density functional with dispersion correction and triple-ζ Slater-type basis is suitable for computationally inexpensive and reasonably accurate DFT calculations.
Collapse
Affiliation(s)
- Isabel Lage-Estebanez
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | | | | | | | | |
Collapse
|
30
|
Ionic conductivities of Li+ based ionic liquids. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
31
|
Glasser L, Jenkins HDB. Predictive thermodynamics for ionic solids and liquids. Phys Chem Chem Phys 2016; 18:21226-40. [DOI: 10.1039/c6cp00235h] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermodynamic properties of ionic solids and liquids may reliably be predicted using volume-based thermodynamics (VBT) and thermodynamic difference rules (TDR).
Collapse
Affiliation(s)
- Leslie Glasser
- Nanochemistry Research Institute
- Department of Chemistry
- Curtin University
- Perth 6845
- Australia
| | | |
Collapse
|
32
|
|
33
|
Abstract
Ionic liquids (ILs) are defined as salts with melting points below 100 °C. They attracted much attention in the last two decades due to their unique set of properties, including high conductivities, low viscosities, negligible vapor pressure, and high electrochemical resistance. ILs are seen as tunable systems, of which (also in mixtures) up to 10(19) combinations may exist. These properties make ILs interesting candidates for a variety of fundamental to industrial applications. Our addition to this field was weakly coordinating, little interacting anions, the highly fluorinated aluminates [Al(OR(F))4](-) (R(F) = C(CF3)3, C(CH3), (CF3)2, and CH(CF3)2 and later also CH2(CF3)). We have used these anions in a broad spectrum of applications, including the stabilization of reactive cations, (polymerization) catalysis, and conducting salts for cyclic voltammetry or in electrochemical cells. Especially the [Al(Ohfip)4](-) (hfip = CH(CF3)2) anions in combination with asymmetric organic cations turned out to be very well suited for the synthesis of ILs with very low melting points, some even far below 0 °C. Also the analogous borates, [B(OR(F))4](-), were shown to yield ILs, and currently a plethora of such aluminate and borate ILs have been synthesized and thoroughly investigated. In many aspects, at least the [Al(Ohfip)4](-) ILs present almost ideally noninteracting prototype ILs with (nearly) isotropic but weak and flat Coulomb potential. Consequently, their overall interionic interactions are significantly reduced compared with other classes of ILs, resulting in an extraordinarily low degree, or (for short cation chain lengths below six) even complete absence of ion pairing. From thorough analysis of the principles governing the physical properties of this highly fluorinated IL class with minimized interactions, we were able to learn basic principles that could be extended, for example, to the prediction of the principal properties of a wide variety of typical ILs. In this Account, we give a comprehensive review of their syntheses, thermal and toxicological behavior, physical as well as dynamic properties, and use in electrochemical applications. We delineate advantages and limitations of the [M(III)(OR(F))4](-) ILs developed in our lab and give an outlook on those fields, in which there is still a lack of knowledge.
Collapse
Affiliation(s)
- Alexander B. A. Rupp
- Albert-Ludwigs-University Freiburg, Institute for Inorganic and Analytical
Chemistry, Albertstrasse
21, 79104 Freiburg, Germany
- Freiburg Materials Research Center, Stefan-Meier-Strasse 21, 79104 Freiburg, Germany
| | - Ingo Krossing
- Albert-Ludwigs-University Freiburg, Institute for Inorganic and Analytical
Chemistry, Albertstrasse
21, 79104 Freiburg, Germany
- Freiburg Materials Research Center, Stefan-Meier-Strasse 21, 79104 Freiburg, Germany
| |
Collapse
|
34
|
Bodo E. Lanthanum(III) and Lutetium(III) in Nitrate-Based Ionic Liquids: A Theoretical Study of Their Coordination Shell. J Phys Chem B 2015; 119:11833-8. [DOI: 10.1021/acs.jpcb.5b06387] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Enrico Bodo
- Department of Chemistry, University of Rome “La Sapienza”, P. A. Moro 5, 00185, Rome, Italy
| |
Collapse
|
35
|
Rigby J, Barrera Acevedo S, Izgorodina EI. Novel SCS-IL-MP2 and SOS-IL-MP2 Methods for Accurate Energetics of Large-Scale Ionic Liquid Clusters. J Chem Theory Comput 2015; 11:3610-6. [DOI: 10.1021/acs.jctc.5b00551] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jason Rigby
- School of Chemistry, Monash University, 17 Rainforest Walk, Clayton, 3800 VIC, Australia
| | | | | |
Collapse
|
36
|
Lindenberg EK, Patey GN. Melting point trends and solid phase behaviors of model salts with ion size asymmetry and distributed cation charge. J Chem Phys 2015; 143:024508. [DOI: 10.1063/1.4923344] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- E. K. Lindenberg
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - G. N. Patey
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| |
Collapse
|
37
|
Affiliation(s)
- Robert Hayes
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, NSW 2006, Sydney, Australia
| | - Rob Atkin
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| |
Collapse
|
38
|
Eilmes A, Kubisiak P. Stability of ion triplets in ionic liquid/lithium salt solutions: Insights from implicit and explicit solvent models and molecular dynamics simulations. J Comput Chem 2015; 36:751-62. [DOI: 10.1002/jcc.23853] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/14/2015] [Accepted: 01/17/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Andrzej Eilmes
- Jagiellonian University, Faculty of Chemistry, Department of Computational Methods in Chemistry; Ingardena 3 30-060 Kraków Poland
| | - Piotr Kubisiak
- Jagiellonian University, Faculty of Chemistry, Department of Computational Methods in Chemistry; Ingardena 3 30-060 Kraków Poland
| |
Collapse
|
39
|
Mondal A, Balasubramanian S. Vibrational Signatures of Cation–Anion Hydrogen Bonding in Ionic Liquids: A Periodic Density Functional Theory and Molecular Dynamics Study. J Phys Chem B 2015; 119:1994-2002. [DOI: 10.1021/jp5113679] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Anirban Mondal
- Chemistry and Physics of
Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
| | - Sundaram Balasubramanian
- Chemistry and Physics of
Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
| |
Collapse
|
40
|
|
41
|
Rezabal E, Schäfer T. Ionic liquids as solvents of polar and non-polar solutes: affinity and coordination. Phys Chem Chem Phys 2015; 17:14588-97. [DOI: 10.1039/c5cp01774b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Evolution of H2O and CO2 interactions with an ionic liquid (IL) from gas phase to IL phase is described. Affinity is lost and coordination patterns vary in the process, favouring H2O–anion and CO2–cation interactions.
Collapse
Affiliation(s)
- Elixabete Rezabal
- Laboratoire de Chimie Moleculaire
- Department of Chemistry
- Ecole Polytechnique and CNRS
- 91128 Palaiseau Cedex
- France
| | - Thomas Schäfer
- POLYMAT
- University of the Basque Country UPV/EHU 20018 Donostia-San Sebastián
- Spain
- Ikerbasque
- Basque Foundation for Science
| |
Collapse
|
42
|
Scarbath-Evers LK, Hunt PA, Kirchner B, MacFarlane DR, Zahn S. Molecular features contributing to the lower viscosity of phosphonium ionic liquids compared to their ammonium analogues. Phys Chem Chem Phys 2015; 17:20205-16. [DOI: 10.1039/c5cp00340g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Classical molecular dynamics simulations identify the size of the central atom and the angle flexibility as important molecular features contributing to the lower viscosity of phosphonium based ionic liquids compared to their ammonium analogues.
Collapse
Affiliation(s)
| | | | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry
- Universität Bonn
- 53115 Bonn
- Germany
| | | | - Stefan Zahn
- Wilhelm Ostwald Institut für Physikalische und Theoretische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| |
Collapse
|
43
|
Salanne M. Simulations of room temperature ionic liquids: from polarizable to coarse-grained force fields. Phys Chem Chem Phys 2015; 17:14270-9. [DOI: 10.1039/c4cp05550k] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This perspective article summarizes the recent advances in the classical molecular modelling of room temperature ionic liquids.
Collapse
Affiliation(s)
- Mathieu Salanne
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8234
- PHENIX
- F-75005 Paris
| |
Collapse
|
44
|
Izgorodina EI, Golze D, Maganti R, Armel V, Taige M, Schubert TJS, MacFarlane DR. Importance of dispersion forces for prediction of thermodynamic and transport properties of some common ionic liquids. Phys Chem Chem Phys 2014; 16:7209-21. [PMID: 24113510 DOI: 10.1039/c3cp53035c] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An extensive study of interaction energies in ion pairs of pyrrolidinium and imidazolium ionic liquids is presented. The Cnmpyr and Cnmim cations with varying alkyl chains from Methyl, Ethyl, n-Propyl to n-Butyl were combined with a wide range of routinely used IL anions such as chloride, bromide, mesylate (CH3SO3 or Mes), tosylate (CH3PhSO3 or Tos), bis(trifluoromethanesulfonyl)amide (NTf2), dicyanamide (N(CN)2 or dca), tetrafluoroborate (BF4) and hexafluorophosphate (PF6). A number of energetically favourable conformations were studied for each cation-anion combination. The interaction energy and its dispersion component of the single ion pairs were calculated using a sophisticated state-of-the-art approach: a second-order of Symmetry Adapted Perturbation Theory (SAPT). A comparison of energetics depending on the cation-anion type, as well as the mode of interaction was performed. Dispersion forces were confirmed to be of importance for the overall stabilisation of ionic liquids contributing from 28 kJ mol(-1) in pyrrolidinium ion pairs to 59 kJ mol(-1) in imidazolium ion pairs. The previously proposed ratio of total interaction energy to dispersion components and melting points was assessed for this set of ionic liquids and was found to correlate with their melting points for the anionic series, producing separate trends for the Cnmim and Cmpyr series of cations. Chlorides, bromides and tetrafluoroborates formed close-to-ideal correlations when both types of cations, Cnmim and Cnmpyr, were combined in the same trend. Correlation of the dispersion component of the interaction energy with transport properties such as conductivity and viscosity was also considered. For imidazolium-based ionic liquids strong linear correlations were obtained, whereas pyrrolidinium ionic liquids appeared to be insensitive to this correlation.
Collapse
|
45
|
Wileńska D, Anusiewicz I, Freza S, Bobrowski M, Laux E, Uhl S, Keppner H, Skurski P. Predicting the viscosity and electrical conductivity of ionic liquids on the basis of theoretically calculated ionic volumes. Mol Phys 2014. [DOI: 10.1080/00268976.2014.964344] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Dorota Wileńska
- Department of Chemistry, University of Gdańsk, Gdańsk, Poland
| | | | - Sylwia Freza
- Department of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Maciej Bobrowski
- Department of Technical Physics and Applied Mathematics, Gdańsk University of Technology, Gdańsk, Poland
| | - Edith Laux
- HES-SO Arc, Institut des Microtechnologies Appliqueés, La Chaux-de Fonds, Switzerland
| | - Stefanie Uhl
- HES-SO Arc, Institut des Microtechnologies Appliqueés, La Chaux-de Fonds, Switzerland
| | - Herbert Keppner
- HES-SO Arc, Institut des Microtechnologies Appliqueés, La Chaux-de Fonds, Switzerland
| | - Piotr Skurski
- Department of Chemistry, University of Gdańsk, Gdańsk, Poland
| |
Collapse
|
46
|
Gutowska N, Maciejewski A. HPLC coupled with a spectrophotometer as a reliable setup for the study of absorption properties of imidazolium ionic liquids using bmimBF4as an example. RSC Adv 2014. [DOI: 10.1039/c4ra03868a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
47
|
Cavalcante ADO, Ribeiro MCC, Skaf MS. Polarizability effects on the structure and dynamics of ionic liquids. J Chem Phys 2014; 140:144108. [DOI: 10.1063/1.4869143] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
48
|
Physicochemical Study of n-Ethylpyridinium bis(trifluoromethylsulfonyl)imide Ionic Liquid. J SOLUTION CHEM 2014. [DOI: 10.1007/s10953-014-0156-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
49
|
Fumino K, Ludwig R. Analyzing the interaction energies between cation and anion in ionic liquids: The subtle balance between Coulomb forces and hydrogen bonding. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.07.009] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
50
|
|