101
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Murphy T, Callear SK, Warr GG, Atkin R. Dissolved chloride markedly changes the nanostructure of the protic ionic liquids propylammonium and ethanolammonium nitrate. Phys Chem Chem Phys 2016; 18:17169-82. [DOI: 10.1039/c5cp06947e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bulk nanostructure of 15 mol% propylammonium chloride (PACl) dissolved in propylammonium nitrate (PAN) and 15 mol% ethanolammonium chloride (EtACl) in ethanolammonium nitrate (EtAN) has been determined using neutron diffraction with empirical potential structure refinement fits.
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Affiliation(s)
- Thomas Murphy
- Priority Research Centre for Advanced Fluids and Interfaces
- The University of Newcastle
- Callaghan
- Australia
| | | | | | - Rob Atkin
- Priority Research Centre for Advanced Fluids and Interfaces
- The University of Newcastle
- Callaghan
- Australia
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102
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Fakhraee M, Gholami MR. Probing the effects of the ester functional group, alkyl side chain length and anions on the bulk nanostructure of ionic liquids: a computational study. Phys Chem Chem Phys 2016; 18:9734-51. [DOI: 10.1039/c5cp07057k] [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]
Abstract
The effects of ester addition on nanostructural properties of biodegradable ILs.
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Affiliation(s)
- Mostafa Fakhraee
- Department of Chemistry
- Sharif University of Technology
- Tehran
- Iran
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103
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Mariani A, Caminiti R, Campetella M, Gontrani L. Pressure-induced mesoscopic disorder in protic ionic liquids: first computational study. Phys Chem Chem Phys 2016; 18:2297-302. [DOI: 10.1039/c5cp06800b] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The application of high pressure to protic ionic liquids with short alkyl chains induces a progressive homogenization of the structure.
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Affiliation(s)
- A. Mariani
- Department of Chemistry
- “La Sapienza” University of Rome
- Italy
| | - R. Caminiti
- Department of Chemistry
- “La Sapienza” University of Rome
- Italy
| | - M. Campetella
- Department of Chemistry
- “La Sapienza” University of Rome
- Italy
| | - L. Gontrani
- Department of Chemistry
- “La Sapienza” University of Rome
- Italy
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104
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Mariani A, Russina O, Caminiti R, Triolo A. Structural organization in a methanol:ethylammonium nitrate (1:4) mixture: A joint X-ray/Neutron diffraction and computational study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.10.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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105
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Moschovi AM, Dracopoulos V. Structure of protic (HCnImNTf2, n=0–12) and aprotic (C1CnImNTf2, n=1–12) imidazolium ionic liquids: A vibrational spectroscopic study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.06.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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106
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Greaves TL, Drummond CJ. Protic Ionic Liquids: Evolving Structure-Property Relationships and Expanding Applications. Chem Rev 2015; 115:11379-448. [PMID: 26426209 DOI: 10.1021/acs.chemrev.5b00158] [Citation(s) in RCA: 513] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tamar L Greaves
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Calum J Drummond
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
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107
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Greaves TL, Kennedy DF, Shen Y, Weerawardena A, Hawley A, Song G, Drummond CJ. Fluorous protic ionic liquid exhibits a series of lyotropic liquid crystalline mesophases upon water addition. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.03.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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108
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Jurado LA, Kim H, Arcifa A, Rossi A, Leal C, Spencer ND, Espinosa-Marzal RM. Irreversible structural change of a dry ionic liquid under nanoconfinement. Phys Chem Chem Phys 2015; 17:13613-24. [PMID: 25941682 DOI: 10.1039/c4cp05592f] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studies of 1-hexyl-3-methyl-imidazolium ethylsulfate ([HMIM] EtSO4) using an extended surface forces apparatus show, for the first time, an ordered structure within the nanoconfined ionic liquid (IL) between mica surfaces that extends up to ∼60 nm from the surface. Our measurements show the growth of this ordered IL-film upon successive nanoconfinements-the structural changes being irreversible upon removal of the confinement-and the response of the structure to shear. The compressibility of this system is lower than that typically measured for ILs, while creep takes place during shear, both findings supporting a long-range liquid-to-solid transition. AFM (sharp-tip) studies of [HMIM] EtSO4 on mica only reveal ∼2 surface IL-layers, with order extending only ∼3 nm from the surface, indicating that confinement is required for the long-range IL-solidification to occur. WAXS studies of the bulk IL show a more pronounced ordered structure than is the case for [HMIM] with bis(trifluoromethylsulfonyl)imide as anion, but no long-range order is detected, consistent with the results obtained with the sharp AFM tip. These are the first force measurements of nanoconfinement-induced long-range solidification of an IL.
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Affiliation(s)
- L Andres Jurado
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, IL-61801 Urbana, USA.
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109
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Araque JC, Hettige JJ, Margulis CJ. Modern Room Temperature Ionic Liquids, a Simple Guide to Understanding Their Structure and How It May Relate to Dynamics. J Phys Chem B 2015; 119:12727-40. [DOI: 10.1021/acs.jpcb.5b05506] [Citation(s) in RCA: 225] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan C. Araque
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Jeevapani J. Hettige
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Claudio J. Margulis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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110
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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
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111
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Prabhu SR, Dutt GB. Does addition of an electrolyte influence the rotational diffusion of nondipolar solutes in a protic ionic liquid? J Phys Chem B 2015; 119:6311-6. [PMID: 25914928 DOI: 10.1021/acs.jpcb.5b02853] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rotational diffusion of two structurally similar nondipolar solutes, 2,5-dimethyl-1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DMDPP) and 1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DPP), has been examined in ethylammonium nitrate-lithium nitrate (EAN-LiNO3) mixtures to understand the influence of added electrolyte on the local environment experienced by the solute molecules. The measured reorientation times of both DMDPP and DPP in EAN-LiNO3 mixtures fall within the broad limits set by the hydrodynamic slip and stick boundary conditions. The hydrogen bond accepting DMDPP and the hydrogen bond donating DPP experience specific interactions with the cation and anion of the ionic liquid, respectively. Addition of LiNO3 (0.1 and 0.2 mole fraction) to EAN induces only viscosity related effects on the rotational diffusion of the two nondipolar solutes. These observations suggest that the local environment experienced by DMDPP and DPP in EAN is not altered upon the addition of LiNO3. Our results are consistent with the structural details available in the literature for EAN-LiNO3 mixtures.
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112
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Russina O, Caminiti R, Méndez-Morales T, Carrete J, Cabeza O, Gallego L, Varela L, Triolo A. How does lithium nitrate dissolve in a protic ionic liquid? J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.08.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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113
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Kundu K, Kattnig DR, Mladenova BY, Grampp G, Das R. Electron Spin–Lattice Relaxation Mechanisms of Nitroxyl Radicals in Ionic Liquids and Conventional Organic Liquids: Temperature Dependence of a Thermally Activated Process. J Phys Chem B 2015; 119:4501-11. [DOI: 10.1021/acs.jpcb.5b00431] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Krishnendu Kundu
- Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Daniel R. Kattnig
- Physical
and Theoretical Chemistry Laboratory, University of Oxford, South Parks
Road, Oxford, OX1 3QZ, United Kingdom
| | - Boryana Y. Mladenova
- Institute
of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/Z2, A-8010 Graz, Austria
| | - Günter Grampp
- Institute
of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/Z2, A-8010 Graz, Austria
| | - Ranjan Das
- Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
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114
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115
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Chen Z, Greaves TL, Caruso RA, Drummond CJ. Effect of cosolvents on the self-assembly of a non-ionic polyethylene oxide–polypropylene oxide–polyethylene oxide block copolymer in the protic ionic liquid ethylammonium nitrate. J Colloid Interface Sci 2015; 441:46-51. [DOI: 10.1016/j.jcis.2014.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 10/29/2014] [Accepted: 11/02/2014] [Indexed: 11/27/2022]
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116
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Kang X, Shang W, Zhu Q, Zhang J, Jiang T, Han B, Wu Z, Li Z, Xing X. Mesoporous inorganic salts with crystal defects: unusual catalysts and catalyst supports. Chem Sci 2015; 6:1668-1675. [PMID: 29308132 PMCID: PMC5639790 DOI: 10.1039/c4sc03736g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 01/06/2015] [Indexed: 11/27/2022] Open
Abstract
We proposed a strategy to synthesize mesoporous inorganic salt particles using the special properties of ionic liquid (IL) mixtures, and hollow mesoporous LaF3, NdF3, and YF3 particles were synthesized and characterized using different techniques. The size of the mesopores in the salt particles was about 4 nm, and the materials were full of crystal defects. The LaF3, NdF3 and YF3 particles were used as the catalysts for the cyanosilylation reaction of benzaldehyde using trimethylsilyl cyanide, and Ru/LaF3 and Ru/NdF3, in which Ru nanocatalysts were supported on the LaF3 and NdF3 particles with mesopores, were used to catalyze hydrogenations of benzene to cyclohexane and levulinic acid (LA) to γ-valerolactone (GVL). It was discovered that the activities of these catalysts were unprecedentedly high for these reactions. Detailed study showed that both the crystal defects and the mesopores in the salt particles played crucial roles for the extremely high catalytic activity.
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Affiliation(s)
- Xinchen Kang
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Wenting Shang
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Qinggong Zhu
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Jianling Zhang
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Tao Jiang
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences , Key Laboratory of Colloid and Interface and Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China . ;
| | - Zhonghua Wu
- Beijing Synchrotron Radiation Facility , Institute of High Energy Physics , Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhihong Li
- Beijing Synchrotron Radiation Facility , Institute of High Energy Physics , Chinese Academy of Sciences , Beijing 100049 , China
| | - Xueqing Xing
- Beijing Synchrotron Radiation Facility , Institute of High Energy Physics , Chinese Academy of Sciences , Beijing 100049 , China
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117
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Nayeri M, Nygård K, Karlsson M, Maréchal M, Burghammer M, Reynolds M, Martinelli A. The role of the ionic liquid C6C1ImTFSI in the sol–gel synthesis of silica studied using in situ SAXS and Raman spectroscopy. Phys Chem Chem Phys 2015; 17:9841-8. [DOI: 10.1039/c5cp00709g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural and chemical changes during the sol–gel synthesis of silica using an ionic liquid are investigatedin situand simultaneously by X-ray scattering and μ-Raman spectroscopy.
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Affiliation(s)
- Moheb Nayeri
- Department of Chemistry and Chemical Engineering
- Chalmers University of Technology
- Gothenburg
- Sweden
| | - Kim Nygård
- Department of Chemistry and Molecular Biology
- University of Gothenburg
- Sweden
| | - Maths Karlsson
- Department of Applied Physics
- Chalmers University of Technology
- Gothenburg
- Sweden
| | | | | | - Michael Reynolds
- European Synchrotron Radiation Facility (ESRF)
- 38000 Grenoble
- France
| | - Anna Martinelli
- Department of Chemistry and Chemical Engineering
- Chalmers University of Technology
- Gothenburg
- Sweden
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118
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Jin W, Yang Q, Zhang Z, Bao Z, Ren Q, Yang Y, Xing H. Self-assembly induced solubilization of drug-like molecules in nanostructured ionic liquids. Chem Commun (Camb) 2015; 51:13170-3. [DOI: 10.1039/c5cc03463a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The self-assembly induced solubilization strategy features the formation of highly ordered mesoscopic structures, such as liquid crystals, through self-assembly of a solute in nanostructured ILs via H-bond interactions, resulting in unprecedented solubility for drug molecules.
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Affiliation(s)
- Wenbin Jin
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qiwei Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhiguo Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zongbi Bao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qilong Ren
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yiwen Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Huabin Xing
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
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119
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Méndez-Morales T, Carrete J, Rodríguez JR, Cabeza Ó, Gallego LJ, Russina O, Varela LM. Nanostructure of mixtures of protic ionic liquids and lithium salts: effect of alkyl chain length. Phys Chem Chem Phys 2015; 17:5298-307. [DOI: 10.1039/c4cp04668d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bulk structure of mixtures of two protic ionic liquids, propylammonium nitrate and butylammonium nitrate, with a salt with a common anion, is analyzed using small angle X-ray scattering and classical molecular dynamics simulations.
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Affiliation(s)
- Trinidad Méndez-Morales
- Grupo de Nanomateriais e Materia Branda
- Departamento de Física da Materia Condensada
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Jesús Carrete
- Grupo de Nanomateriais e Materia Branda
- Departamento de Física da Materia Condensada
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Julio R. Rodríguez
- Grupo de Nanomateriais e Materia Branda
- Departamento de Física da Materia Condensada
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Óscar Cabeza
- Facultade de Ciencias
- Universidade da Coruña
- Spain
| | - Luis J. Gallego
- Grupo de Nanomateriais e Materia Branda
- Departamento de Física da Materia Condensada
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | | | - Luis M. Varela
- Grupo de Nanomateriais e Materia Branda
- Departamento de Física da Materia Condensada
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
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120
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Li H, Atkin R, Page AJ. Combined friction force microscopy and quantum chemical investigation of the tribotronic response at the propylammonium nitrate–graphite interface. Phys Chem Chem Phys 2015; 17:16047-52. [DOI: 10.1039/c5cp01952d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The energetic origins of the variation in friction with potential at the propylammonium nitrate–graphite interface are revealed using friction force microscopy (FFM) in combination with quantum chemical simulations.
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Affiliation(s)
- H. Li
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| | - R. Atkin
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| | - A. J. Page
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
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121
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He Z, Alexandridis P. Nanoparticles in ionic liquids: interactions and organization. Phys Chem Chem Phys 2015; 17:18238-61. [DOI: 10.1039/c5cp01620g] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Interactions between nanoparticles and ionic liquids can lead to a variety of organized structures.
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Affiliation(s)
- Zhiqi He
- Department of Chemical and Biological Engineering
- University at Buffalo
- The State University of New York (SUNY)
- Buffalo
- USA
| | - Paschalis Alexandridis
- Department of Chemical and Biological Engineering
- University at Buffalo
- The State University of New York (SUNY)
- Buffalo
- USA
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122
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Chen Z, Greaves TL, Caruso RA, Drummond CJ. Amphiphile Micelle Structures in the Protic Ionic Liquid Ethylammonium Nitrate and Water. J Phys Chem B 2014; 119:179-91. [DOI: 10.1021/jp509557z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhengfei Chen
- Particulate
Fluids Processing Centre (PFPC), School of Chemistry, The University of Melbourne, Melbourne, Victoria 3010, Australia
- CSIRO Materials Science and Engineering, Bag
10, Clayton South MDC, Victoria 3169, Australia
| | - Tamar L. Greaves
- CSIRO Materials Science and Engineering, Bag
10, Clayton South MDC, Victoria 3169, Australia
- School
of Applied Sciences, College of Science, Engineering and Health, RMIT University, GPO
Box 2476, Melbourne, Victoria 3001, Australia
| | - Rachel A. Caruso
- Particulate
Fluids Processing Centre (PFPC), School of Chemistry, The University of Melbourne, Melbourne, Victoria 3010, Australia
- CSIRO Materials Science and Engineering, Bag
10, Clayton South MDC, Victoria 3169, Australia
| | - Calum J. Drummond
- CSIRO Materials Science and Engineering, Bag
10, Clayton South MDC, Victoria 3169, Australia
- School
of Applied Sciences, College of Science, Engineering and Health, RMIT University, GPO
Box 2476, Melbourne, Victoria 3001, Australia
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123
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Greaves TL, Ha K, Muir BW, Howard SC, Weerawardena A, Kirby N, Drummond CJ. Protic ionic liquids (PILs) nanostructure and physicochemical properties: development of high-throughput methodology for PIL creation and property screens. Phys Chem Chem Phys 2014; 17:2357-65. [PMID: 25475718 DOI: 10.1039/c4cp04241g] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high-throughput approach was developed in order to prepare and dry a series of protic ionic liquids (PILs) from 48 Brønsted acid-base combinations. Many combinations comprised an alkyl carboxylic acid paired with an alkyl amine. Visual screens were developed to identify which acid-base combinations formed PILs, and of those, which PILs were likely to have high surface tensions, low viscosities, and low melting points. The surface tension screen was validated through pendant drop surface tension measurements. Karl Fischer coulometric titration was used to obtain the water contents, and it was noted that there is a considerable difference in the drying rate throughout this series of PILs. It was observed that an octyl chain present on either the cation or anion was detrimental to the formation of a PIL with a low melting point, and instead increased the likelihood of a gel or solid forming. The nanostructure of the PILs was determined, using synchrotron small and wide angle X-ray scattering (SAXS/WAXS), to consist of polar and non-polar domains, with the alkyl chains on the cation and anion intercalating. The results indicate that both the alkyl chain on the cation and/or anion contribute to the correlation distance, for the intermediate range order, with the expectation that there is charge alternation of the ions in the polar region. The maximum correlation distance was observed when there was an alkyl chain present on only one ion. This correlation distance could be significantly reduced by varying the alkyl chain length present on the other ion, which was attributed to increased disorder and interdigitation of chains, and to toe-to-toe alignment of the chains. To the best of our knowledge this is the first PIL report into the effect of having an alkyl chain present on both the cation and the anion.
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Affiliation(s)
- Tamar L Greaves
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
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124
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Li H, Cooper PK, Somers AE, Rutland MW, Howlett PC, Forsyth M, Atkin R. Ionic Liquid Adsorption and Nanotribology at the Silica-Oil Interface: Hundred-Fold Dilution in Oil Lubricates as Effectively as the Pure Ionic Liquid. J Phys Chem Lett 2014; 5:4095-4099. [PMID: 26278938 DOI: 10.1021/jz5021422] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The remarkable physical properties of ionic liquids (ILs) make them potentially excellent lubricants. One of the challenges for using ILs as lubricants is their high cost. In this article, atomic force microscopy (AFM) nanotribology measurements reveal that a 1 mol % solution of IL dissolved in an oil lubricates the silica surface as effectively as the pure IL. The adsorption isotherm shows that the IL surface excess need only be approximately half of the saturation value to prevent surface contact and effectively lubricate the sliding surfaces. Using ILs in this way makes them viable for large-scale applications.
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Affiliation(s)
- Hua Li
- †Centre for Advanced Particle Processing and Transport, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Peter K Cooper
- †Centre for Advanced Particle Processing and Transport, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Anthony E Somers
- ‡ARC Centre of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Mark W Rutland
- §School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm SE100 44, Sweden
- ⊥Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Stockholm SE100 44, Sweden
| | - Patrick C Howlett
- ‡ARC Centre of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Maria Forsyth
- ‡ARC Centre of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Rob Atkin
- †Centre for Advanced Particle Processing and Transport, The University of Newcastle, Callaghan, New South Wales 2308, Australia
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125
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Murphy T, Varela LM, Webber GB, Warr GG, Atkin R. Nanostructure–Thermal Conductivity Relationships in Protic Ionic Liquids. J Phys Chem B 2014; 118:12017-24. [DOI: 10.1021/jp507408r] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Thomas Murphy
- Priority
Research Centre for Advanced Particle Processing and Transport, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Luis M. Varela
- Grupo
de Nanomateriais e Materia Branda, Departamento de Física da
Materia Condensada, Universidade de Santiago de Compostela, Campus
Vida s/n E-15782, Santiago de Compostela, Spain
| | - Grant B. Webber
- Priority
Research Centre for Advanced Particle Processing and Transport, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Rob Atkin
- Priority
Research Centre for Advanced Particle Processing and Transport, The University of Newcastle, NSW 2308, Callaghan, Australia
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126
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Conformational Changes and Phase Behaviour in the Protic Ionic Liquid 1-Ethylimidazolium Bis(trifluoromethylsulfonyl)imide in the Bulk and Nano-Confined State. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402496] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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127
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Addicoat MA, Stefanovic R, Webber GB, Atkin R, Page AJ. Assessment of the Density Functional Tight Binding Method for Protic Ionic Liquids. J Chem Theory Comput 2014; 10:4633-4643. [PMID: 25328497 PMCID: PMC4196743 DOI: 10.1021/ct500394t] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Indexed: 01/17/2023]
Abstract
![]()
Density
functional tight binding (DFTB), which is ∼100–1000
times faster than full density functional theory (DFT), has been used
to simulate the structure and properties of protic ionic liquid (IL)
ions, clusters of ions and the bulk liquid. Proton affinities for
a wide range of IL cations and anions determined using DFTB generally
reproduce G3B3 values to within 5–10 kcal/mol. The structures
and thermodynamic stabilities of n-alkyl ammonium
nitrate clusters (up to 450 quantum chemical atoms) predicted with
DFTB are in excellent agreement with those determined using DFT. The
IL bulk structure simulated using DFTB with periodic boundary conditions
is in excellent agreement with published neutron diffraction data.
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Affiliation(s)
- Matthew A Addicoat
- School of Engineering and Science, Jacobs University Bremen , Campus Ring 1, 28759 Bremen, Germany
| | - Ryan Stefanovic
- Newcastle Institute for Energy and Resources, The University of Newcastle , NSW 2308, Callaghan, Australia
| | - Grant B Webber
- Newcastle Institute for Energy and Resources, The University of Newcastle , NSW 2308, Callaghan, Australia
| | - Rob Atkin
- Newcastle Institute for Energy and Resources, The University of Newcastle , NSW 2308, Callaghan, Australia
| | - Alister J Page
- Newcastle Institute for Energy and Resources, The University of Newcastle , NSW 2308, Callaghan, Australia
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128
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Jiang HJ, FitzGerald PA, Dolan A, Atkin R, Warr GG. Amphiphilic Self-Assembly of Alkanols in Protic Ionic Liquids. J Phys Chem B 2014; 118:9983-90. [DOI: 10.1021/jp504998t] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haihui Joy Jiang
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Paul A. FitzGerald
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Andrew Dolan
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Rob Atkin
- Centre
for Advanced Particle Processing and Transport, Chemistry Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
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129
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Bodo E, Mangialardo S, Capitani F, Gontrani L, Leonelli F, Postorino P. Interaction of a long alkyl chain protic ionic liquid and water. J Chem Phys 2014; 140:204503. [DOI: 10.1063/1.4876036] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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130
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High Pressure Study of Rotational Dynamics of Perylene and Sodium 8-methoxypyrene-1,3,6-trisulfonate in Imidazolium-Based Ionic Liquids. J SOLUTION CHEM 2014. [DOI: 10.1007/s10953-014-0166-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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131
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Takekiyo T, Fukudome K, Yamazaki K, Abe H, Yoshimura Y. Protein aggregation and partial globular state in aqueous 1-alkyl-3-methylimidazolium nitrate solutions. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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132
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Rai G, Kumar A. Elucidation of Ionic Interactions in the Protic Ionic Liquid Solutions by Isothermal Titration Calorimetry. J Phys Chem B 2014; 118:4160-8. [DOI: 10.1021/jp5019179] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gitanjali Rai
- Physical
and Materials Chemistry
Division, National Chemical Laboratory, Homi Bhabha Road, Pune 411008, India
| | - Anil Kumar
- Physical
and Materials Chemistry
Division, National Chemical Laboratory, Homi Bhabha Road, Pune 411008, India
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133
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134
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Wei K, Deng L, Wang Y, Ou-Yang ZC, Wang G. Effect of Side-Chain Length on Structural and Dynamic Properties of Ionic Liquids with Hydroxyl Cationic Tails. J Phys Chem B 2014; 118:3642-9. [DOI: 10.1021/jp410168t] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kuo Wei
- State
Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 55 East Zhongguancun Road, P.O.
Box 2735, Beijing, 100190 China
- College of Science, Northwest A&F University, 3 Taicheng Road, Yangling, Shaanxi, 712100 China
| | - Li Deng
- State
Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 55 East Zhongguancun Road, P.O.
Box 2735, Beijing, 100190 China
| | - Yanting Wang
- State
Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 55 East Zhongguancun Road, P.O.
Box 2735, Beijing, 100190 China
| | - Zhong-Can Ou-Yang
- State
Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 55 East Zhongguancun Road, P.O.
Box 2735, Beijing, 100190 China
| | - Guodong Wang
- College of Science, Northwest A&F University, 3 Taicheng Road, Yangling, Shaanxi, 712100 China
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135
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Li Q, Wang X, Yue X, Chen X. Phase transition of a quaternary ammonium Gemini surfactant induced by minor structural changes of protic ionic liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1522-1530. [PMID: 24455981 DOI: 10.1021/la404826k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aggregation behaviors of a Gemini surfactant [C12H25(CH3)2N(+)(CH2)2N(+)(CH3)2C12H25]Br2(-) (12-2-12) in two protic ionic liquids (PILs), propylammonium nitrate (PAN) and butylammonium nitrate (BAN), were investigated by means of several experimental techniques including small and wide-angle X-ray scattering, the polarized optical microscopy and the rheological measurement. Compared to those in ethylammonium nitrate (EAN), the minor structural changes with only one or two methylene units (-CH2-) increase in cationic chain length of PIL, result in a dramatic phase transition of formed aggregates. The critical micellization concentration was increased in PAN, while no micelle formation was detected in BAN. A normal hexagonal phase was observed in the 12-2-12/PAN system, while the normal hexagonal, bicontinuous cubic, and lamellar phases were mapped in the 12-2-12/BAN system. Such aggregation behavior changes can be ascribed to the weaker solvophobic interactions of 12-2-12 in PAN and BAN. The unique molecular structure of 12-2-12 is also an important factor to highlight such a dramatic phase transition due to the PIL structure change.
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Affiliation(s)
- Qintang Li
- Key Laboratory of Colloid and Interface Chemistry, Shandong University Ministry of Education , Jinan, 250100, China
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136
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Smith J, Webber GB, Warr GG, Atkin R. Silica particle stability and settling in protic ionic liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1506-1513. [PMID: 24450614 DOI: 10.1021/la403978b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Silica particle suspensions of 10 wt % have been investigated in the protic ionic liquids (ILs) ethylammonium nitrate (EAN), ethanolammonium nitrate (EtAN), propylammonium nitrate (PAN), and dimethylethylammonium formate (DMEAF). Static and dynamic light scattering reveal that single particles coexist in dynamic equilibrium with flocculated networks at room temperature. These types of systems are classified as weakly flocculated and are quite rare. As weakly flocculated systems generally exist only within a narrow range of conditions, the effect of temperature was probed. When temperature is increased, the thermal motion of suspended particles increases, favoring dispersion, but in ILs suspensions, heating reduces the stabilizing effect of the interfacial structure of the IL. When subjected to a small increase in temperature, particle suspensions in ILs become unstable, indicated by the absence of a peak corresponding to single particles in the light scattering data. For EAN and DMEAF, further increasing temperatures above 40 °C returns the systems to a weakly flocculated state in which thermal energy is sufficient to break particles away from aggregates. Weakly flocculated suspensions in EAN and EtAN settle more rapidly than predicted by the Stokes equation, as the particles spend a significant portion of time in large, rapidly settling flocs. Surprisingly, suspensions in PAN and DMEAF settle slower than predicted. Oscillatory rheology indicates that these suspensions are viscoelastic, due to a persistent, long-range structure in the suspension that slows settling. In aggregated systems, settling is very rapid.
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Affiliation(s)
- Jacob Smith
- Priority Research Centre for Advanced Particle Processing and Transport, The University of Newcastle , Callaghan, NSW 2308, Australia
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137
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Murphy T, Hayes R, Imberti S, Warr GG, Atkin R. Nanostructure of an ionic liquid–glycerol mixture. Phys Chem Chem Phys 2014; 16:13182-90. [DOI: 10.1039/c4cp01570c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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138
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Chen S, Zhang S, Liu X, Wang J, Wang J, Dong K, Sun J, Xu B. Ionic liquid clusters: structure, formation mechanism, and effect on the behavior of ionic liquids. Phys Chem Chem Phys 2014; 16:5893-906. [DOI: 10.1039/c3cp53116c] [Citation(s) in RCA: 136] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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139
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Russina O, Fazio B, Di Marco G, Caminiti R, Triolo A. Structural Organization in Neat Ionic Liquids and in Their Mixtures. THE STRUCTURE OF IONIC LIQUIDS 2014. [DOI: 10.1007/978-3-319-01698-6_2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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140
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Shen Y, Greaves TL, Kennedy DF, Weerawardena A, Kirby N, Song G, Drummond CJ. Lyotropic liquid crystal phases of phytantriol in a protic ionic liquid with fluorous anion. Phys Chem Chem Phys 2014; 16:21321-9. [DOI: 10.1039/c4cp01926a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid crystal phases of phytantriol supported in solvent mixtures of a fluorinated protic ionic liquid and water.
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Affiliation(s)
- Yan Shen
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237, PR China
| | - Tamar L. Greaves
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
| | | | - Asoka Weerawardena
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
| | | | - Gonghua Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237, PR China
| | - Calum J. Drummond
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
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141
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Tsuzuki S, Shinoda W, Miran MS, Kinoshita H, Yasuda T, Watanabe M. Interactions in ion pairs of protic ionic liquids: Comparison with aprotic ionic liquids. J Chem Phys 2013; 139:174504. [DOI: 10.1063/1.4827519] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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142
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Russina O, Caminiti R, Triolo A, Rajamani S, Melai B, Bertoli A, Chiappe C. Physico-chemical properties and nanoscale morphology in N-alkyl-N-methylmorpholinium dicyanamide room temperature ionic liquids. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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143
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Shang W, Kang X, Ning H, Zhang J, Zhang X, Wu Z, Mo G, Xing X, Han B. Shape and size controlled synthesis of MOF nanocrystals with the assistance of ionic liquid mircoemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13168-13174. [PMID: 24127865 DOI: 10.1021/la402882a] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this work, the La-metal-organic frameworks (La-MOFs) were synthesized using lanthanum(III) nitrate and 1,3,5-benzenetricarboxylic acid (BTC) in H2O-in-1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6), bmimPF6-in-water, and the bicontinuous microemulsions stabilized by surfactant TX-100. The MOFs prepared were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), thermal gravimetric analysis (TGA), and FT-IR methods, and the microstructures of the microemulsions in the H2O/bmimPF6/TX-100 system were studied by small-angle X-ray scattering (SXAS) technique. It was shown that the dispersed droplets in the water-in-bmimPF6, bicontinuous and bmimPF6-in-water microemulsions were spherical, lamellar, and cylindrical, respectively. The shapes of the La-MOFs synthesized were similar to that of the droplets in the corresponding microemulsions. This indicated that the morphology of MOFs could be controlled by the microstructures of the microemulsions. On the basis of the systematic experimental results, the mechanism for controlling the morphology of the MOFs was proposed.
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Affiliation(s)
- Wenting Shang
- CAS Key Laboratory of Colloid and Interface and Thermodynamics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing, China
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144
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Smith JA, Webber GB, Warr GG, Atkin R. Rheology of protic ionic liquids and their mixtures. J Phys Chem B 2013; 117:13930-5. [PMID: 24102175 DOI: 10.1021/jp407715e] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rheological properties of five pure protic ionic liquids (ILs), ethylammonium nitrate (EAN), propylammonium nitrate (PAN), ethanolammonium nitrate (EtAN), ethylammonium formate (EAF), and dimethylethylammonium formate (DMEAF), are characterized and interpreted by considering the effects of both the H-bond network and the solvophobic nanostructure of the liquids. The results demonstrate that these effects are not, however, independent or simply additive. At 20 °C, EtAN has the highest zero shear viscosity of 156.1 mPa·s, followed by PAN (89.3 mPa·s), EAN (35.9 mPa·s), EAF (23.1 mPa·s), and DMEAF (9.8 mPa·s). The primary ammonium ILs behave as Newtonian fluids at low shear rates but shear thin at high shear. Fits to the Vogel-Fulcher-Tammann model reveal that nanostructure is not affected appreciably by temperature and that all the ILs studied are of intermediate fragility. The rheology of binary mixtures of these ILs was analyzed and used to demonstrate fundamental differences in the way IL cations and anions interact. IL mixtures containing both nitrate and formate anions resist flow more strongly than the pure liquids, which is a consequence of the difference in hydrogen bonding capacity of the anions. Mixing cations can give rise to complex behavior due to the offsetting effects of hydrogen bonding and solvophobic nanostructure formation.
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Affiliation(s)
- J A Smith
- Priority Research Centre for Advanced Particle Processing and Transport, The University of Newcastle , Callaghan, New South Wales 2308, Australia
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145
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Faria LFO, Penna TC, Ribeiro MCC. Raman Spectroscopic Study of Temperature and Pressure Effects on the Ionic Liquid Propylammonium Nitrate. J Phys Chem B 2013; 117:10905-12. [DOI: 10.1021/jp4066778] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Luiz F. O. Faria
- Laboratório de Espectroscopia
Molecular, Instituto de Química, Universidade de São Paulo, CP
26077, CEP 05513-970, São
Paulo, SP, Brazil
| | - Tatiana C. Penna
- Laboratório de Espectroscopia
Molecular, Instituto de Química, Universidade de São Paulo, CP
26077, CEP 05513-970, São
Paulo, SP, Brazil
| | - Mauro C. C. Ribeiro
- Laboratório de Espectroscopia
Molecular, Instituto de Química, Universidade de São Paulo, CP
26077, CEP 05513-970, São
Paulo, SP, Brazil
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146
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Pereiro AB, Pastoriza-Gallego MJ, Shimizu K, Marrucho IM, Lopes JNC, Piñeiro MM, Rebelo LPN. On the formation of a third, nanostructured domain in ionic liquids. J Phys Chem B 2013; 117:10826-33. [PMID: 23964834 DOI: 10.1021/jp402300c] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The study of solid-fluid transitions in fluorinated ionic liquids using differential scanning calorimetry, rheology, and molecular modeling techniques is an essential step toward the understanding of their dynamics and the thermodynamics and the development of potential applications. Two fluorinated ionic liquids were studied: 1-hexyl-3-methylimidazolium perfluorobutanesulfonate, HMIm(PFBu)SO3, and tetrabutylammonium perfluorobutanesulfonate, NB4(PFBu)SO3. The experimental calorimetric and rheological data were analyzed taking into account the possible mesoscale structure of the two fluorinated ionic liquids. The simulation results indicate the possible formation of three nanosegregated domains-polar, nonpolar, and fluorous-that may have a profound impact on ionic liquid research. In the case of HMIm (PFBu)SO3 the three types of mesoscopic domains can act as interchangeable jigsaw pieces enabling the formation of multiple types of crystals and inducing the observed calorimetry and rheological trends.
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Affiliation(s)
- Ana B Pereiro
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa , Apartado 127, 2780-157 Oeiras, Portugal
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147
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Takekiyo T, Koyama Y, Yamazaki K, Abe H, Yoshimura Y. Ionic liquid-induced formation of the α-helical structure of β-lactoglobulin. J Phys Chem B 2013; 117:10142-8. [PMID: 23926920 DOI: 10.1021/jp405834n] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structural modification of bovine milk β-lactoglobulin (β-LG) in aqueous 1-butyl-3-methylimidazolium nitrate ([bmim][NO3]) and ethylammonium nitrate ([EAN][NO3]) solutions has been investigated by Fourier transform infrared and circular dichroism spectroscopy. Remarkably, high ionic liquid (IL) concentrations (>15 mol %IL) caused formation of a non-native α-helical structure of β-LG and disruption of its tertiary structure. Furthermore, while [bmim][NO3] promoted protein aggregation, [EAN][NO3] inhibited it probably owing to differences in the unique solution structure (nanoheterogeneity) of the ILs by the different cationic species. The IL-induced α-helical formation of β-LG shows a behavior similar to the alcohol denaturation, but a disordered structure-rich state was observed in the β-α transition process by adding IL, in contrast to the case of an aqueous alcohol solution of protein. We propose that the molten salt-like property of aqueous IL solutions strongly support α-helical formation of proteins.
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Affiliation(s)
- Takahiro Takekiyo
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Japan 239-8686.
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148
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Greaves TL, Drummond CJ. Solvent nanostructure, the solvophobic effect and amphiphile self-assembly in ionic liquids. Chem Soc Rev 2013; 42:1096-120. [PMID: 23165291 DOI: 10.1039/c2cs35339c] [Citation(s) in RCA: 253] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The ability of ionic liquids (ILs) to support amphiphile self-assembly into a range of mesophase structures has been established as a widespread phenomenon. From the ILs evaluated as self-assembly media, the vast majority have supported some lyotropic liquid crystal phase formation. Many neat ionic liquids have been shown to segregate into polar and non-polar domains to form a nanostructured liquid. A very strong correlation between the nanostructure of the ionic liquid and its characteristics as an amphiphile self-assembly solvent has been found. In this review we discuss ionic liquids as amphiphile self-assembly media, and identify trends that can be used to distinguish which ionic liquids are likely to have good promotion properties as self-assembly media. In particular these trends focus on the nanostructure of neat ionic liquids, their solvent cohesive energy density, and the related solvophobic effect. We forecast that many more ILs will be identified as amphiphile self-assembly solvents in the future.
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Affiliation(s)
- Tamar L Greaves
- CSIRO Materials Science and Engineering, Bag 10, Clayton VIC 3169, Australia.
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149
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Campetella M, Gontrani L, Bodo E, Ceccacci F, Marincola FC, Caminiti R. Conformational isomerisms and nano-aggregation in substituted alkylammonium nitrates ionic liquids: An x-ray and computational study of 2-methoxyethylammonium nitrate. J Chem Phys 2013; 138:184506. [DOI: 10.1063/1.4803799] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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150
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Hayes R, Imberti S, Warr GG, Atkin R. The Nature of Hydrogen Bonding in Protic Ionic Liquids. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209273] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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