1
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Das SK, Winghart MO, Han P, Rana D, Zhang ZY, Eckert S, Fondell M, Schnappinger T, Nibbering ETJ, Odelius M. Electronic Fingerprint of the Protonated Imidazole Dimer Probed by X-ray Absorption Spectroscopy. J Phys Chem Lett 2024; 15:1264-1272. [PMID: 38278137 PMCID: PMC10860131 DOI: 10.1021/acs.jpclett.3c03576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/28/2024]
Abstract
Protons in low-barrier superstrong hydrogen bonds are typically delocalized between two electronegative atoms. Conventional methods to characterize such superstrong hydrogen bonds are vibrational spectroscopy and diffraction techniques. We introduce soft X-ray spectroscopy to uncover the electronic fingerprints for proton sharing in the protonated imidazole dimer, a prototypical building block enabling effective proton transport in biology and high-temperature fuel cells. Using nitrogen core excitations as a sensitive probe for the protonation status, we identify the X-ray signature of a shared proton in the solvated imidazole dimer in a combined experimental and theoretical approach. The degree of proton sharing is examined as a function of structural variations that modify the shape of the low-barrier potential in the superstrong hydrogen bond. We conclude by showing how the sensitivity to the quantum distribution of proton motion in the double-well potential is reflected in the spectral signature of the shared proton.
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Affiliation(s)
- Sambit K. Das
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91 Stockholm, Sweden
| | - Marc-Oliver Winghart
- Max
Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, 12489 Berlin, Germany
| | - Peng Han
- Max
Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, 12489 Berlin, Germany
| | - Debkumar Rana
- Max
Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, 12489 Berlin, Germany
| | - Zhuang-Yan Zhang
- Max
Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, 12489 Berlin, Germany
| | - Sebastian Eckert
- Institute
for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, 12489 Berlin, Germany
| | - Mattis Fondell
- Institute
for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, 12489 Berlin, Germany
| | - Thomas Schnappinger
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91 Stockholm, Sweden
| | - Erik T. J. Nibbering
- Max
Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, 12489 Berlin, Germany
| | - Michael Odelius
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91 Stockholm, Sweden
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2
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Moses AA, Arntsen C. Ab initio molecular dynamics study of proton transport in imidazolium-based ionic liquids with added imidazole. Phys Chem Chem Phys 2023; 25:2142-2152. [PMID: 36562495 DOI: 10.1039/d2cp03262g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Development of efficient anhydrous proton-conducting materials would expand the operational temperature ranges of hydrogen fuels cells (HFCs) and eliminate their dependence on maintaining sufficient hydration levels to function efficiently. Protic ionic liquids (PILs), which have high ionic densities and low vapor pressures, have emerged as a potential material for proton conducting layers in HFCs. In this work, we investigate proton transport via the Grotthuss mechanism in 1-ethylimidazolium bis-(trifluoromethanesulfonyl)imide ([C2HIm][TFSI]) protic ionic liquids with added imidazole (Im0) using ab initio molecular dynamics. In particular, we vary the composition of the systems studied from pure [C2HIm][TFSI] to those where the mole fraction of Im0 is 0.67. Given the large difference in pKa between C2HIm+ and HTFSI, TFSI- does not accept acidic protons from C2HIm+; conversely, imidazolium (HIm+) and C2HIm+ have very similar pKa values, and thus Im0 can readily accept protons. We find that the unprotonated nitrogen on Im0 dominates solvation of the labile protons on C2HIm+ and other Im0 species, resulting in formation of robust imidazole wires. Given the amphoteric nature of Im0, i.e. its ability to accept and donate protons, these wires provide conduits along which protons can rapidly traverse via the Grotthuss mechanism, thereby greatly increasing the proton coefficient of self-diffusion. We find that the average length of the wires increases with added Im0, and thus as the mole fraction of Im0 increases so too does the proton diffusion constant. Lastly, we analyze our trajectories to determine the energy and time scales associated with proton transfer.
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Affiliation(s)
- Aurelia A Moses
- Department of Chemical and Biological Sciences, Youngstown State University, Youngstown, OH, 44555, USA.
| | - Christopher Arntsen
- Department of Chemical and Biological Sciences, Youngstown State University, Youngstown, OH, 44555, USA.
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3
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Endo T, Sunada K, Sumida H, Kimura Y. Origin of low melting point of ionic liquids: dominant role of entropy. Chem Sci 2022; 13:7560-7565. [PMID: 35872823 PMCID: PMC9241968 DOI: 10.1039/d2sc02342c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/07/2022] [Indexed: 11/21/2022] Open
Abstract
Large structural entropy makes salts liquid at room temperature.
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Affiliation(s)
- Takatsugu Endo
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
| | - Kouki Sunada
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
| | - Hiroki Sumida
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
| | - Yoshifumi Kimura
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
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4
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Atsango AO, Tuckerman ME, Markland TE. Characterizing and Contrasting Structural Proton Transport Mechanisms in Azole Hydrogen Bond Networks Using Ab Initio Molecular Dynamics. J Phys Chem Lett 2021; 12:8749-8756. [PMID: 34478302 DOI: 10.1021/acs.jpclett.1c02266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Imidazole and 1,2,3-triazole are promising hydrogen-bonded heterocycles that conduct protons via a structural mechanism and whose derivatives are present in systems ranging from biological proton channels to proton exchange membrane fuel cells. Here, we leverage multiple time-stepping to perform ab initio molecular dynamics of imidazole and 1,2,3-triazole at the nanosecond time scale. We show that despite the close structural similarities of these compounds, their proton diffusion constants vary by over an order of magnitude. Our simulations reveal the reasons for these differences in diffusion constants, which range from the degree of hydrogen-bonded chain linearity to the effect of the central nitrogen atom in 1,2,3-triazole on proton transport. In particular, we uncover evidence of two "blocking" mechanisms in 1,2,3-triazole, where covalent and hydrogen bonds formed by the central nitrogen atom limit the mobility of protons. Our simulations thus provide insights into the origins of the experimentally observed 10-fold difference in proton conductivity.
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Affiliation(s)
- Austin O Atsango
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mark E Tuckerman
- Department of Chemistry, New York University, New York, New York 10003, United States
- Courant Institute of Mathematical Science, New York University, New York, New York 10012, United States
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshan Road North, Shanghai 200062, China
| | - Thomas E Markland
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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5
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Stoppelman JP, McDaniel JG. Physics-based, neural network force fields for reactive molecular dynamics: Investigation of carbene formation from [EMIM +][OAc -]. J Chem Phys 2021; 155:104112. [PMID: 34525833 DOI: 10.1063/5.0063187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Reactive molecular dynamics simulations enable a detailed understanding of solvent effects on chemical reaction mechanisms and reaction rates. While classical molecular dynamics using reactive force fields allows significantly longer simulation time scales and larger system sizes compared with ab initio molecular dynamics, constructing reactive force fields is a difficult and complex task. In this work, we describe a general approach following the empirical valence bond framework for constructing ab initio reactive force fields for condensed phase simulations by combining physics-based methods with neural networks (PB/NNs). The physics-based terms ensure the correct asymptotic behavior of electrostatic, polarization, and dispersion interactions and are compatible with existing solvent force fields. NNs are utilized for a versatile description of short-range orbital interactions within the transition state region and accurate rendering of vibrational motion of the reacting complex. We demonstrate our methodology for a simple deprotonation reaction of the 1-ethyl-3-methylimidazolium cation with acetate to form 1-ethyl-3-methylimidazol-2-ylidene and acetic acid. Our PB/NN force field exhibits ∼1 kJ mol-1 mean absolute error accuracy within the transition state region for the gas-phase complex. To characterize the solvent modulation of the reaction profile, we compute potentials of mean force for the gas-phase reaction as well as the reaction within a four-ion cluster and benchmark against ab initio molecular dynamics simulations. We find that the surrounding ionic environment significantly destabilizes the formation of the carbene product, and we show that this effect is accurately captured by the reactive force field. By construction, the PB/NN potential may be directly employed for simulations of other solvents/chemical environments without additional parameterization.
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Affiliation(s)
- John P Stoppelman
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
| | - Jesse G McDaniel
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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6
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Hori Y, Dekura S, Sunairi Y, Ida T, Mizuno M, Mori H, Shigeta Y. Proton Conduction Mechanism for Anhydrous Imidazolium Hydrogen Succinate Based on Local Structures and Molecular Dynamics. J Phys Chem Lett 2021; 12:5390-5394. [PMID: 34080418 DOI: 10.1021/acs.jpclett.1c01280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Anhydrous organic crystalline materials incorporating imidazolium hydrogen succinate (Im-Suc), which exhibit high proton conduction even at temperatures above 100 °C, are attractive for elucidating proton conduction mechanisms toward the development of solid electrolytes for fuel cells. Herein, quantum chemical calculations were used to investigate the proton conduction mechanism in terms of hydrogen-bonding (H-bonding) changes and restricted molecular rotation in Im-Suc. The local H-bond structures for proton conduction were characterized by vibrational frequency analysis and compared with corresponding experimental data. The calculated potential energy surface involving proton transfer (PT) and imidazole (Im) rotational motion showed that PT between Im and succinic acid was a rate-limiting step for proton transport in Im-Suc and that proton conduction proceeded via the successive coupling of PT and Im rotational motion based on a Grotthuss-type mechanism. These findings provide molecular-level insights into proton conduction mechanisms for Im-based (or -incorporated) H-bonding organic proton conductors.
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Affiliation(s)
- Yuta Hori
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Shun Dekura
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yoshiya Sunairi
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Tomonori Ida
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan
| | - Motohiro Mizuno
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan
- NanoMaterials Research Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Hatsumi Mori
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
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7
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Long Z, Atsango AO, Napoli JA, Markland TE, Tuckerman ME. Elucidating the Proton Transport Pathways in Liquid Imidazole with First-Principles Molecular Dynamics. J Phys Chem Lett 2020; 11:6156-6163. [PMID: 32633523 DOI: 10.1021/acs.jpclett.0c01744] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Imidazole is a promising anhydrous proton conductor with a high conductivity comparable to that of water at a similar temperature relative to its melting point. Previous theoretical studies of the mechanism of proton transport in imidazole have relied either on empirical models or on ab initio trajectories that have been too short to draw significant conclusions. Here, we present the results of multiple time-step ab initio molecular dynamics simulations of an excess proton in liquid imidazole reaching 1 ns in total simulation time. We find that the proton transport is dominated by structural diffusion, with the diffusion constant of the proton defect being ∼8 times higher than that of self-diffusion of the imidazole molecules. By using correlation function analysis, we decompose the mechanism for proton transport into a series of first-order processes and show that the proton transport mechanism occurs over three distinct time and length scales. Although the mechanism at intermediate times is dominated by hopping along pseudo-one-dimensional chains, at longer times the overall rate of diffusion is limited by the re-formation of these chains. These results provide a more complete picture of the traditional idealized Grotthuss structural diffusion mechanism.
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Affiliation(s)
- Zhuoran Long
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Austin O Atsango
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Joseph A Napoli
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Thomas E Markland
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mark E Tuckerman
- Department of Chemistry, New York University, New York, New York 10003, United States
- Courant Institute of Mathematical Science, New York University, New York, New York 10012, United States
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshan Road North, Shanghai 200062, China
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8
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Grinderslev JB, Lee YS, Paskevicius M, Møller KT, Yan Y, Cho YW, Jensen TR. Ammonium–Ammonia Complexes, N2H7+, in Ammonium closo-Borate Ammines: Synthesis, Structure, and Properties. Inorg Chem 2020; 59:11449-11458. [DOI: 10.1021/acs.inorgchem.0c01257] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jakob B. Grinderslev
- Center for Materials Crystallography, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Young-Su Lee
- Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Mark Paskevicius
- Center for Materials Crystallography, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
- Physics and Astronomy, Fuels and Energy Technology Institute (FETI), Curtin University, Bentley, Western Australia 6845, Australia
| | - Kasper T. Møller
- Center for Materials Crystallography, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
- Physics and Astronomy, Fuels and Energy Technology Institute (FETI), Curtin University, Bentley, Western Australia 6845, Australia
| | - Yigang Yan
- Center for Materials Crystallography, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Young Whan Cho
- Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Torben R. Jensen
- Center for Materials Crystallography, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
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9
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Li A, Yan T. Proton Propensity and Orientation of Imidazolium Cation at Liquid Imidazole-Vacuum Interface: A Molecular Dynamics Simulation. J Phys Chem B 2020; 124:4010-4016. [PMID: 32309950 DOI: 10.1021/acs.jpcb.9b11918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imidazole has gained attention as an alternative to anhydrous proton conductor in high-temperature proton exchange membrane fuel cells. A detailed investigation of proton propensity and the orientation of the imidazolium cation at the liquid-vacuum interface is important for understanding the interfacial properties of imidazole-based proton-conductive materials. Here, we perform all-atom molecular dynamics simulation on a slab model of the liquid imidazole-vacuum interface. Proton transportation process between the imidazolium cation and neutral imidazole molecules is described by the multistate empirical valence bond model of imidazole developed previously. The imidazolium cation shows a tendency to stay in the bulk region rather than at the outermost surface, and the NN vectors and norm vectors of both the imidazolium cation and imidazole molecules are more probable to be perpendicular to the surface normal vector at the interface than in the bulk. The orientation of the hydrogen bond cluster shows the same tendency as the NN vectors, which indicates that proton transportation along the direction of the surface normal vector is hindered. The instantaneous surface analyses show that the fluctuation is depressed when the imidazolium cation is near the outermost surface, which makes it less favorable for the cation appearing at the interface.
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Affiliation(s)
- Ailin Li
- Institute of New Energy Chemistry, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.,College of Science, Civil Aviation University of China, Tianjin 300300, China
| | - Tianying Yan
- Institute of New Energy Chemistry, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
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10
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Mora Cardozo JF, Embs JP, Benedetto A, Ballone P. Equilibrium Structure, Hydrogen Bonding, and Proton Conductivity in Half-Neutralized Diamine Ionic Liquids. J Phys Chem B 2019; 123:5608-5625. [PMID: 30875220 DOI: 10.1021/acs.jpcb.9b00890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recent experiments on proton conducting ionic liquids point to half-neutralized diamine-triflate salts as promising candidates for applications in power generation and energy conversion electrochemical devices. Structural and dynamical properties of the simplest among these compounds are investigated by a combination of density functional theory (DFT) and molecular dynamics (MD) simulations based on an empirical force field. Three different cations have been considered, consisting of a pair of amine-ammonium terminations joined by a short aliphatic segment -(CH2) n- with n = 2, 3, and 4. First, the ground state structure, vibrational eigenstates, and hydrogen-bonding properties of single ions, neutral ion pairs, small neutral aggregates of up to eight ions, and molecularly thin hydrogen bonded wires have been investigated by DFT computations. Second, structural and dynamical properties of homogeneous liquid and amorphous phases are investigated by MD simulations over the temperature range of 200 ≤ T ≤ 440 K. Structure factors, radial distribution functions, diffusion coefficient, and electrical conductivity are computed and discussed, highlighting the inherent structural heterogeneity of these compounds. The core investigation, however, is the characterization of connected paths consisting of cation chains that could support proton transport via a Grotthuss-type mechanism. Since simulations are carried out using a force field of fixed bonding topology, this analysis is based on the equilibrium structure only, using geometrical criteria to identify potential paths for proton conduction. Paths of connected cations can reach a length of 80 cations and 30 Å, provided that bridging oxygen atoms from triflate anions are taken into account. The effects of water contamination at 1% weight concentration on the structure, dynamics, and paths for proton transport are discussed.
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Affiliation(s)
- Juan F Mora Cardozo
- Laboratory for Neutron Scattering and Imaging , Paul Scherrer Institute , Villigen PSI, Villigen 5232 , Switzerland
| | - J P Embs
- Laboratory for Neutron Scattering and Imaging , Paul Scherrer Institute , Villigen PSI, Villigen 5232 , Switzerland
| | - A Benedetto
- Laboratory for Neutron Scattering and Imaging , Paul Scherrer Institute , Villigen PSI, Villigen 5232 , Switzerland.,Department of Sciences , University of Roma Tre , Via della Vasca Navale 84 , 00146 Rome , Italy
| | - P Ballone
- Italian Institute of Technology , Via Morego 30 , 16163 Genova , Italy
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11
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Shin JY, Wang YL, Yamada SA, Hung ST, Fayer MD. Imidazole and 1-Methylimidazole Hydrogen Bonding and Nonhydrogen Bonding Liquid Dynamics: Ultrafast IR Experiments. J Phys Chem B 2019; 123:2094-2105. [DOI: 10.1021/acs.jpcb.8b11299] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jae Yoon Shin
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yong-Lei Wang
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Steven A. Yamada
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Samantha T. Hung
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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12
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Hori Y, Chikai T, Ida T, Mizuno M. Local structure and hydrogen bond characteristics of imidazole molecules for proton conduction in acid and base proton-conducting composite materials. Phys Chem Chem Phys 2018; 20:10311-10318. [DOI: 10.1039/c7cp08396c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Protons in composite materials of acidic polymers and imidazole molecules transport with rotational motion of imidazole in hydrogen bonds.
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Affiliation(s)
- Yuta Hori
- Chemistry Course, Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
- Japan
| | - Takuma Chikai
- Chemistry Course, Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
- Japan
| | - Tomonori Ida
- Chemistry Course, Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
- Japan
| | - Motohiro Mizuno
- Chemistry Course, Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
- Japan
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13
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14
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Hori Y, Ida T, Mizuno M. Potential energy construction in the diabatic picture for quantum mechanical rate constants of intermolecular proton transfer. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp03024j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose a simple method for potential construction in the diabatic picture and the estimation of thermal rate constants for intermolecular proton transfer reactions using quantum dynamics simulations carried out on the constructed potentials.
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Affiliation(s)
- Yuta Hori
- Chemistry Course
- Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
| | - Tomonori Ida
- Chemistry Course
- Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
| | - Motohiro Mizuno
- Chemistry Course
- Division of Material Chemistry
- Graduate School of Natural Science and Technology
- Kanazawa University
- Kanazawa 920-1192
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15
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Prakash M, Subramanian V. Ab initio and density functional theory (DFT) studies on triflic acid with water and protonated water clusters. J Mol Model 2016; 22:293. [PMID: 27888404 DOI: 10.1007/s00894-016-3158-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 11/08/2016] [Indexed: 02/04/2023]
Abstract
The structure, stability and infrared spectral signatures of triflic acid (TA) with water clusters (Wn) and protonated water clusters (TAH+Wn, n = 1 - 6) were computed using DFT and MP2 methods. Our calculations show that a minimum of three water molecules are necessary to stabilize the dissociated zwitterionic form of TA. It can be seen from the results that there is no significant movement of protons in smaller (n = 1 and 2) and linear (n = 1 - 6) types of water clusters. Further, the geometries of TAWn clusters first form a neutral pair (NP) to contact ion pair (CIP), then form a solvent separated ion pair (SSIP) in a water hexamer. These findings reveal that proton transfer may take place through NP to CIP and then CIP to SSIP. The calculated binding energies (BEs) of ion pair clusters is always higher than that of NP clusters (i.e., more stable than the NP). Existing excess proton linear chain clusters transfer a proton to adjacent water molecules via a Grotthuss mechanism, whereas the same isomers in the branched motifs do not conduct protons. Examination of geometrical parameters and infrared frequencies reveals hydronium ion (H3O+ also called Eigen cation) formation in both TAWn and protonated TAWn clusters. The stability of Eigen water clusters is three times higher than that of other non-Eigen water clusters. Our study shows clearly that formation of ion pairs in TAWn and TAH+Wn clusters greatly favors proton transfer to neighboring water molecules and also enhances the stability of these complexes.
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Affiliation(s)
- M Prakash
- Department of Chemistry and Research Institute, SRM University, Kattankulathur, 603203, Tamil Nadu, India
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600 020, India
| | - V Subramanian
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600 020, India.
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus, Chennai, 600 020, India.
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16
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Sun Q, Harvey JA, Greco KV, Auerbach SM. Molecular Simulations of Hydrogen Bond Cluster Size and Reorientation Dynamics in Liquid and Glassy Azole Systems. J Phys Chem B 2016; 120:10411-10419. [DOI: 10.1021/acs.jpcb.6b07148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qinfang Sun
- Department
of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Jacob A. Harvey
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Katharine V. Greco
- Department
of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Scott M. Auerbach
- Department
of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
- Department
of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
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17
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Bua-ngern W, Chaiwongwattana S, Suwannakham P, Sagarik K. Dynamics of proton transfer in imidazole hydrogen-bond chains. RSC Adv 2016. [DOI: 10.1039/c6ra17636d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Potential energy curve of H-bond (2) in G4-[1](ω1=−92) is nearly identical to H-bond (1) in G2-[1](ω1=−94), the protonated H-bond (2) becomes a new precursor for the next transfer and confirms the Eigen–Zundel–Eigen mechanism.
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Affiliation(s)
- Worapong Bua-ngern
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - Sermsiri Chaiwongwattana
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - Parichart Suwannakham
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - Kritsana Sagarik
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
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18
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Chen H, Liu P, Voth GA. Efficient Multistate Reactive Molecular Dynamics Approach Based on Short-Range Effective Potentials. J Chem Theory Comput 2015; 6:3039-47. [PMID: 26616768 DOI: 10.1021/ct100318f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nonbonded interactions between molecules usually include the van der Waals force and computationally expensive long-range electrostatic interactions. This article develops a more efficient approach: the effective-interaction multistate empirical-valence-bond (EI-MS-EVB) model. The EI-MS-EVB method relies on a mapping of all interactions onto a short-range and thus, computationally efficient effective potential. The effective potential is tabulated by matching its force to known trajectories obtained from the full-potential empirical multistate empirical-valence-bond (MS-EVB) model. The effective pairwise interaction depends on and is uniquely determined by the atomic configuration of the system, varying only with respect to the hydrogen-bonding topology. By comparing the EI-MS-EVB and full MS-EVB calculations of several equilibrium and dynamic properties important to hydrated excess proton solvation and transport, we show that the EI-MS-EVB model produces very accurate results for the specific system in which the tabulated potentials were generated. The EI-MS-EVB potential also transfers reasonably well to similar systems with different temperatures and box sizes. The EI-MS-EVB method also reduces the computational cost of the nonbonded interactions by about 1 order of magnitude in comparison with the full algorithm.
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Affiliation(s)
- Hanning Chen
- Department of Chemistry, James Franck Institute, and Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, and Johnson & Johnson Pharmaceutical Research & Development, 665 Stockton Drive, Exton, Pennsylvania 19341
| | - Pu Liu
- Department of Chemistry, James Franck Institute, and Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, and Johnson & Johnson Pharmaceutical Research & Development, 665 Stockton Drive, Exton, Pennsylvania 19341
| | - Gregory A Voth
- Department of Chemistry, James Franck Institute, and Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, and Johnson & Johnson Pharmaceutical Research & Development, 665 Stockton Drive, Exton, Pennsylvania 19341
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19
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Proton transfer mechanism of 1,3,5-tri(2-benzimidazolyl) benzene with a unique triple-stranded hydrogen bond network as studied by DFT-MD simulations. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Cosby T, Holt A, Griffin PJ, Wang Y, Sangoro J. Proton Transport in Imidazoles: Unraveling the Role of Supramolecular Structure. J Phys Chem Lett 2015; 6:3961-3965. [PMID: 26722899 DOI: 10.1021/acs.jpclett.5b01887] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The impact of supramolecular hydrogen bonded networks on dynamics and charge transport in 2-ethyl-4-methylimidazole (2E4MIm), a model proton-conducting system, is investigated by broadband dielectric spectroscopy, depolarized dynamic light scattering, viscometry, and calorimetry. It is observed that the slow, Debye-like relaxation reflecting the supramolecular structure in neat 2E4MIm is eliminated upon the addition of minute amounts of levulinic acid. This is attributed to the dissociation of imidazole molecules and the breaking down of hydrogen-bonded chains, which leads to a 10-fold enhancement of ionic conductivity.
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Affiliation(s)
| | | | - Philip J Griffin
- Department of Materials Science and Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Yangyang Wang
- Center for Nanophase Materials Science, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
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21
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Kumar M, Venkatnathan A. Quantum Chemistry Study of Proton Transport in Imidazole Chains. J Phys Chem B 2015; 119:3213-22. [DOI: 10.1021/jp508994c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Milan Kumar
- Department
of Chemical Engineering, Rajiv Gandhi Institute of Petroleum Technology, Rae Bareli 229316, Uttar Pradesh, India
| | - Arun Venkatnathan
- Department
of Chemistry, Indian Institute of Science Education and Research, Pune 411008, Maharashtra, India
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22
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Rodriguez J, Elola MD, Laria D. Equilibrium and Dynamical Characteristics of Imidazole Langmuir Monolayers on Graphite Sheets. J Phys Chem B 2014; 119:9123-8. [DOI: 10.1021/jp508913w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Javier Rodriguez
- Departamento
de Física de la Materia Condensada, Comisión Nacional de Energía Atómica, Avenida Libertador 8250, 1429 Buenos Aires, Argentina
- ECyT, UNSAM, Martín
de Irigoyen 3100, 1650 San Martín, Provincia de Buenos Aires, Argentina
| | - M. Dolores Elola
- Departamento
de Física de la Materia Condensada, Comisión Nacional de Energía Atómica, Avenida Libertador 8250, 1429 Buenos Aires, Argentina
| | - D. Laria
- Departamento
de Física de la Materia Condensada, Comisión Nacional de Energía Atómica, Avenida Libertador 8250, 1429 Buenos Aires, Argentina
- Departamento
de Química Inorgánica Analítica y Química-Física
e INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
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23
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Cao Z, Kumar R, Peng Y, Voth GA. Proton transport under external applied voltage. J Phys Chem B 2014; 118:8090-8. [PMID: 24720738 DOI: 10.1021/jp501130m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Proton transport through an electrolyte layer between platinum electrodes under a range of applied voltages is explored using reactive molecular dynamics simulation. The proton transport process is decomposed into vehicular and Grotthuss hopping components, and the two mechanisms and their correlation are investigated as a function of applied voltage. At higher applied voltages, the effect of the hopping mechanism is much larger as compared with the vehicular mechanism. As the voltage is increased, the net correlation between the two mechanisms goes from negative to positive, and both the hopping frequency as well as the number of consecutive forward hops increases. This behavior results in a larger total diffusion constant at higher values of the voltage. The behavior of the hydrated excess proton is therefore substantially different under an applied external voltage than in the normal bulk water environment.
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Affiliation(s)
- Zhen Cao
- Department of Chemistry, James Frank Institute, Computation Institute, The University of Chicago , 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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24
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Kim SY, Lee J, Park MJ. Proton Hopping and Diffusion Behavior of Sulfonated Block Copolymers Containing Ionic Liquids. Macromolecules 2014. [DOI: 10.1021/ma4025152] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sung Yeon Kim
- Division of Advanced Materials
Science and ‡Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Korea 790-784
| | - Joungphil Lee
- Division of Advanced Materials
Science and ‡Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Korea 790-784
| | - Moon Jeong Park
- Division of Advanced Materials
Science and ‡Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Korea 790-784
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25
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Thisuwan J, Sagarik K. Proton dissociation and transfer in a phosphoric acid doped imidazole system. RSC Adv 2014. [DOI: 10.1039/c4ra08198f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fluctuations of local-dielectric environment and H-bond chain lengths lead to intermediate complexes and proton transfer along the Im H-bond chains.
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Affiliation(s)
- Jittima Thisuwan
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000, Thailand
| | - Kritsana Sagarik
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000, Thailand
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26
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Yang T, Huang N, Meng L. Chitosan modified by nitrogen-containing heterocycle and its excellent performance for anhydrous proton conduction. RSC Adv 2013. [DOI: 10.1039/c3ra23139a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Li A, Cao Z, Li Y, Yan T, Shen P. Structure and Dynamics of Proton Transfer in Liquid Imidazole. A Molecular Dynamics Simulation. J Phys Chem B 2012; 116:12793-800. [DOI: 10.1021/jp302656a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ailin Li
- Institute of New Energy Material
Chemistry, Tianjin Key Laboratory of Metal- and Molecule-Based Material
Chemistry, Nankai University, Tianjin 300071, China
| | - Zhen Cao
- Institute of New Energy Material
Chemistry, Tianjin Key Laboratory of Metal- and Molecule-Based Material
Chemistry, Nankai University, Tianjin 300071, China
| | - Yao Li
- Institute of New Energy Material
Chemistry, Tianjin Key Laboratory of Metal- and Molecule-Based Material
Chemistry, Nankai University, Tianjin 300071, China
| | - Tianying Yan
- Institute of New Energy Material
Chemistry, Tianjin Key Laboratory of Metal- and Molecule-Based Material
Chemistry, Nankai University, Tianjin 300071, China
| | - Panwen Shen
- Institute of New Energy Material
Chemistry, Tianjin Key Laboratory of Metal- and Molecule-Based Material
Chemistry, Nankai University, Tianjin 300071, China
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28
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Hoarfrost ML, Tyagi M, Segalman RA, Reimer JA. Proton Hopping and Long-Range Transport in the Protic Ionic Liquid [Im][TFSI], Probed by Pulsed-Field Gradient NMR and Quasi-Elastic Neutron Scattering. J Phys Chem B 2012; 116:8201-9. [DOI: 10.1021/jp3044237] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Megan L. Hoarfrost
- Department of Chemical and Biomolecular
Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Energy and Environmental Technologies
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Madhusudan Tyagi
- National Institue of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
- Department of Materials Science
and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Rachel A. Segalman
- Department of Chemical and Biomolecular
Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
| | - Jeffrey A. Reimer
- Department of Chemical and Biomolecular
Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Energy and Environmental Technologies
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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29
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Tricoli V, Orsini G, Anselmi M. Ion transport in a class of imidazole-based liquid/solid protic ionics. Phys Chem Chem Phys 2012; 14:10979-86. [PMID: 22766840 DOI: 10.1039/c2cp41027c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A class of protic ionic-compounds were prepared by Brønsted acid-base reaction of imidazole or benzimidazole with one of the following acids: trifluoromethanesulfonic, nonafluorobutanesulfonic, para-toluenesulfonic and trifluoroacetic. Except those based on trifluoroacetic acid, all prepared compounds are thermally stable up to at least 270 °C. They are solid up to temperatures between 134 and 220 °C, depending on their constituent acid and base. A simple physico-mathematical model of ion motion in the lattice was developed and implemented to correctly interpret frequency-dependent electrical response of these materials, particularly in the solid state, and investigate their ion-conducting behavior as a function of temperature. These ionic compounds display sensible ionic conductivity up to ca. 5 × 10(-4) and 5 × 10(-2) S cm(-1) in the solid and molten state, respectively, under fully anhydrous conditions. The presence of absorbed water, after brief exposure to an ambient atmosphere, enhances conduction properties remarkably. Conductivity values up to 10(-3) and 10(-1) S cm(-1) were registered, respectively, in the solid and molten state, after short exposure to (humid) ambient air. It is argued how absorbed water molecules may remove protons from (ImH)(+) or (BImH)(+) groups, thereby enabling a chain mechanism of proton-hopping through non-protonated Im or BIm sites. It is discussed how these results and methods may inspire designing protic ionic-materials at the solid-state, with enhanced proton conduction even under fully-anhydrous conditions.
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Affiliation(s)
- Vincenzo Tricoli
- Department of Chemical Engineering and Materials Science, Università di Pisa, largo L. Lazzarino, 1, I-56122, Pisa, Italy.
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30
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Oh SY, Kawamura G, Muto H, Matsuda A. Anhydrous protic conduction of mechanochemically synthesized CsHSO4–Azole-derived composites. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.04.141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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31
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Harvey JA, Basak D, Venkataraman D, Auerbach SM. Simulating hydrogen-bond clustering and phase behaviour of imidazole oligomers. Mol Phys 2012. [DOI: 10.1080/00268976.2012.680515] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Luo J, Tan TV, Conrad O, Vankelecom IFJ. 1H-1,2,4-Triazole as solvent for imidazolium methanesulfonate. Phys Chem Chem Phys 2012; 14:11441-7. [DOI: 10.1039/c2cp41098b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Tang Q, Wu J, Tang Z, Li Y, Lin J. High-temperature proton exchange membranes from ionic liquid absorbed/doped superabsorbents. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32637j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Mangiatordi GF, Butera V, Russo N, Laage D, Adamo C. Charge transport in poly-imidazole membranes: a fresh appraisal of the Grotthuss mechanism. Phys Chem Chem Phys 2012; 14:10910-8. [DOI: 10.1039/c2cp23727j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Giuseppe Felice Mangiatordi
- Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie, CNRS UMR-7575, Chimie-ParisTech, 11 rue P. et M. Curie, F-75231 Paris Cedex 05, France
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35
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Viswanathan U, Basak D, Venkataraman D, Fermann JT, Auerbach SM. Modeling Energy Landscapes of Proton Motion in Nonaqueous, Tethered Proton Wires. J Phys Chem A 2011; 115:5423-34. [DOI: 10.1021/jp1051535] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Usha Viswanathan
- Department of Chemistry and ‡Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Dipankar Basak
- Department of Chemistry and ‡Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Dhandapani Venkataraman
- Department of Chemistry and ‡Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Justin T. Fermann
- Department of Chemistry and ‡Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Scott M. Auerbach
- Department of Chemistry and ‡Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
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36
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Gerardi HK, Gardenier GH, Viswanathan U, Auerbach SM, Johnson MA. Vibrational predissociation spectroscopy and theory of Ar-tagged, protonated Imidazole (Im) Im1–3H+·Ar clusters. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.10.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Basak D, Christensen S, Surampudi SK, Versek C, Toscano DT, Tuominen MT, Hayward RC, Venkataraman D. Proton conduction in discotic mesogens. Chem Commun (Camb) 2011; 47:5566-8. [DOI: 10.1039/c1cc10509d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We show that discotic mesogens can be used to lower the activation energy barrier for proton transport.
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Affiliation(s)
- Dipankar Basak
- Department of Chemistry
- University of Massachusetts Amherst
- Amherst
- USA
| | - Scott Christensen
- Department of Polymer Science and Engineering
- University of Massachusetts Amherst
- USA
| | | | - Craig Versek
- Department of Physics
- University of Massachusetts Amherst
- USA
| | - Daniel T. Toscano
- Department of Chemistry
- University of Massachusetts Amherst
- Amherst
- USA
| | | | - Ryan C. Hayward
- Department of Polymer Science and Engineering
- University of Massachusetts Amherst
- USA
| | - D. Venkataraman
- Department of Chemistry
- University of Massachusetts Amherst
- Amherst
- USA
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38
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Shaik MS, Liem SY, Yuan Y, Popelier PLA. Simulation of liquid imidazole using a high-rank quantum topological electrostatic potential. Phys Chem Chem Phys 2010; 12:15040-55. [DOI: 10.1039/c0cp00417k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Majeed S Shaik
- Manchester Interdisciplinary Biocentre (MIB), 131 Princess Street, Univ. of Manchester, Manchester M1 7DN, UK
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39
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Niu S, Cao Z, Li S, Yan T. Structure and Transport Properties of the LiPF6 Doped 1-Ethyl-2,3-dimethyl-imidazolium Hexafluorophosphate Ionic Liquids: A Molecular Dynamics Study. J Phys Chem B 2009; 114:877-81. [DOI: 10.1021/jp909486z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shuai Niu
- Institute of New Material Chemistry, Department of Material Chemistry, and Institute of Scientific Computing, Nankai University, Tianjin 300071, China
| | - Zhen Cao
- Institute of New Material Chemistry, Department of Material Chemistry, and Institute of Scientific Computing, Nankai University, Tianjin 300071, China
| | - Shu Li
- Institute of New Material Chemistry, Department of Material Chemistry, and Institute of Scientific Computing, Nankai University, Tianjin 300071, China
| | - Tianying Yan
- Institute of New Material Chemistry, Department of Material Chemistry, and Institute of Scientific Computing, Nankai University, Tianjin 300071, China
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