1
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McGrogan A, Byrne EL, Guiney R, Headen TF, Youngs TGA, Chrobok A, Holbrey JD, Swadźba-Kwaśny M. The structure of protic ionic liquids based on sulfuric acid, doped with excess of sulfuric acid or with water. Phys Chem Chem Phys 2023; 25:9785-9795. [PMID: 36647728 DOI: 10.1039/d2cp04292d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Neutron scattering with isotopic substitution was used to study the structure of concentrated sulfuric acid, and two protic ionic liquids (PILs): a Brønsted-acidic PIL, synthesised using pyridine and excess of sulfuric acid, [Hpy][HSO4]·H2SO4, and a hydrated PIL, in which an equimolar mixture of sulfuric acid and pyridine has been doped with water, [Hpy][HSO4]·2H2O. Brønsted acidic PILs are excellent solvents/catalysts for esterifications, driving reaction to completion by phase-separating water and ester products. Water-doped PILs are efficient solvents/antisolvents in biomass fractionation. This study was carried out to provide an insight into the relationship between the performance of PILs in the two respective processes and their liquid structure. It was found that a persistent sulfate/sulfuric acid/water network structure was retained through the transition from sulfuric acid to PILs, even in the presence of 2 moles (∼17 wt%) of water. Hydrogen sulfate PILs have the propensity to incorporate water into hydrogen-bonded anionic chains, with strong and directional hydrogen bonds, which essentially form a new water-in-salt solvent system, with its own distinct structure and physico-chemical properties. It is the properties of this hydrated PIL that can be credited both for the good performance in esterification and beneficial solvent/antisolvent behaviour in biomass fractionation.
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Affiliation(s)
- Anne McGrogan
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
| | - Emily L Byrne
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
| | - Robert Guiney
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
| | - Thomas F Headen
- Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK
| | | | - Anna Chrobok
- Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gilwice, Poland
| | - John D Holbrey
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
| | - Małgorzata Swadźba-Kwaśny
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
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2
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3
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Papez P, Urbic T. Simple two-dimensional models of alcohols. Phys Rev E 2022; 105:054608. [PMID: 35706252 PMCID: PMC10040488 DOI: 10.1103/physreve.105.054608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/11/2022] [Indexed: 05/03/2023]
Abstract
Alcohols are organic compounds characterized by one or more hydroxyl groups attached to a carbon atom of an alkyl group. They can be considered as organic derivatives of water in which one of the hydrogen atoms is replaced by an alkyl group. In this work, the Mercedes-Benz model of water is used to design simple two-dimensional (2D) models of lower alcohols. The structural and thermodynamic properties of the constructed simple models are studied by conducting Monte Carlo simulations in the isothermal-isobaric ensemble. We show that 2D models display similar trends in structuring and thermodynamics as in experiments. The present work on the smallest amphiphilc organic solutes provides a simple testing ground to study the competition between polar and non-polar effects within the molecule and physical properties.
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Affiliation(s)
- Petra Papez
- Laboratory for Molecular Modeling, National Institute of Chemistry, Hajdrihova 19, SI-1001, Slovenia and Department of Physics, Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, SI-1000, Slovenia
| | - Tomaz Urbic
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna Pot 113, SI-1000 Ljubljana, Slovenia
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4
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Cabaço MI, Besnard M, Cruz C, Morgado P, Silva GC, Filipe EJM, Coutinho JA, Danten Y. Breaking the Structure of Liquid Hydrogenated Alcohols Using Perfluorinated tert-Butanol: A Multitechnique Approach (Infrared, Raman, and X-ray Scattering) Analyzed by DFT and Molecular Dynamics Calculations. J Phys Chem B 2022; 126:1992-2004. [PMID: 35230118 PMCID: PMC9776561 DOI: 10.1021/acs.jpcb.1c10776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The state of aggregation at room temperature of tert-butanol (TBH) and perfluoro tert-butanol (TBF) liquid mixtures is assessed by vibrational spectroscopy (Raman and infrared) and X-ray diffraction and analyzed using density functional theory (DFT) and molecular dynamics (MD) simulations. It is shown that larger clusters (mostly tetramers) of TBH are destroyed upon dilution with TBF. Small oligomers, monomers, and mainly heterodimers are present at the equimolar concentration. At variance with slightly interacting solvents, the signature of hetero-oligomers is shown by the appearance of a new broad band detected in the infrared region. The same spectral observation is detected for mixtures of other hydrogenated alcohols (methanol and 1-butanol). The new infrared feature is unaffected by dilution in a polar solvent (CDCl3) in a high-concentration domain, allowing us to assign it to the signature of small hetero-oligomers. MD simulations are used to assess the nature of the species present in the mixture (monomers and small hetero-oligomers) and to follow the evolution of their population upon the dilution. Combining MD simulations with DFT calculations, the infrared spectral profile is successfully analyzed in equimolecular mixtures. This study shows that TBF is a structure breaker of hydrogen-bonded alcohol networks and that the TBF (donor)-TBH (acceptor) heterodimer is the dominant species in an extended range of concentration, centered in the vicinity of the equimolar fraction.
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Affiliation(s)
- M. Isabel Cabaço
- CeFEMA,
Centro de Física e Engenharia de Materiais Avançados,
Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
- Laboratory
of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL),
Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal
| | - Marcel Besnard
- CeFEMA,
Centro de Física e Engenharia de Materiais Avançados,
Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
- GSM
Institut des Sciences Moléculaires, CNRS (UMR 5255), Université Bordeaux I, 351, Cours de la Libération, 33405 Talence Cedex, France
| | - Carlos Cruz
- CeFEMA,
Centro de Física e Engenharia de Materiais Avançados,
Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Pedro Morgado
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Gonçalo
M. C. Silva
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Eduardo J. M. Filipe
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - João A.
P. Coutinho
- CICECO,
Departamento de Química, Universidade
de Aveiro, 3810-193 Aveiro, Portugal
| | - Yann Danten
- GSM
Institut des Sciences Moléculaires, CNRS (UMR 5255), Université Bordeaux I, 351, Cours de la Libération, 33405 Talence Cedex, France
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5
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Isabel Cabaço M, Besnard M, Cruz C, Morgado P, Silva GM, Filipe EJ, Coutinho JA, Danten Y. The structure of liquid perfluoro Tert-Butanol using Infrared, Raman and X-Ray scattering analyzed by quantum DFT calculations and molecular Dynamics. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Gaseous hetero dimers of perfluoro tert-butyl alcohol with hydrogenated alcohols by infrared spectroscopy and quantum DFT calculations. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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8
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Imberti S. Linking excess order to co-solvent aggregation in solvent mixtures. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1649483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Silvia Imberti
- UKRI-STFC, ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, UK
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9
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Ranjbar S, Soltanabadi A, Fakhri Z. Experimental and computational studies of binary mixtures of cis and trans 2-methylcyclohexanol + cyclohexylamine. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.03.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Three-dimensional Morphology and X-ray Scattering Structure of Aqueous tert-Butanol Mixtures: A Molecular Dynamics Study. J CHEM SCI 2017. [DOI: 10.1007/s12039-016-1207-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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11
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Delavoux YM, Gilmore M, Atkins MP, Swadźba-Kwaśny M, Holbrey JD. Intermolecular structure and hydrogen-bonding in liquid 1,2-propylene carbonate and 1,2-glycerol carbonate determined by neutron scattering. Phys Chem Chem Phys 2017; 19:2867-2876. [DOI: 10.1039/c6cp07790k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Propylene carbonate CO⋯H–C hydrogen-bonding motifs are disrupted in glycerol carbonate by the presence of the hydroxyl group.
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Affiliation(s)
- Yoan M. Delavoux
- QUILL
- School of Chemistry and Chemical Engineering
- The Queen's University of Belfast
- Belfast
- UK
| | - Mark Gilmore
- QUILL
- School of Chemistry and Chemical Engineering
- The Queen's University of Belfast
- Belfast
- UK
| | - Martin P. Atkins
- QUILL
- School of Chemistry and Chemical Engineering
- The Queen's University of Belfast
- Belfast
- UK
| | | | - John D. Holbrey
- QUILL
- School of Chemistry and Chemical Engineering
- The Queen's University of Belfast
- Belfast
- UK
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12
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Dutta S, Lefort R, Morineau D, Mhanna R, Merdrignac-Conanec O, Saint-Jalmes A, Leclercq T. Thermodynamics of binary gas adsorption in nanopores. Phys Chem Chem Phys 2016; 18:24361-9. [PMID: 27532892 DOI: 10.1039/c6cp01587e] [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
MCM-41 nanoporous silicas show a very high selectivity for monoalcohols over aprotic molecules during adsorption of a binary mixture in the gas phase. We present here an original use of gravimetric vapour sorption isotherms to characterize the role played by the alcohol hydrogen-bonding network in the adsorption process. Beyond simple selectivity, vapour sorption isotherms measured for various compositions help to completely unravel at the molecular level the step by step adsorption mechanism of the binary system in the nanoporous solid, from the first monolayers to the complete liquid condensation.
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Affiliation(s)
- Sujeet Dutta
- Institut de Physique de Rennes, University of Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes, France.
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13
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Falkowska M, Bowron DT, Manyar HG, Hardacre C, Youngs TGA. Neutron Scattering of Aromatic and Aliphatic Liquids. Chemphyschem 2016; 17:2043-55. [PMID: 26990367 PMCID: PMC4999024 DOI: 10.1002/cphc.201600149] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Indexed: 11/06/2022]
Abstract
Organic solvents, such as cyclohexane, cyclohexene, methylcyclohexane, benzene and toluene, are widely used as both reagents and solvents in industrial processes. Despite the ubiquity of these liquids, the local structures that govern the chemical properties have not been studied extensively. Herein, we report neutron diffraction measurements on liquid cyclohexane, cyclohexene, methylcyclohexane, benzene and toluene at 298 K to obtain a detailed description of the local structure in these compounds. The radial distribution functions of the centres of the molecules, as well as the partial distribution functions for the double bond for cyclohexene and methyl group for methylcyclohexane and toluene have been calculated. Additionally, probability density functions and angular radial distribution functions were extracted to provide a full description of the local structure within the chosen liquids. Structural motifs are discussed and compared for all liquids, referring specifically to the functional group and aromaticity present in the different liquids.
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Affiliation(s)
- Marta Falkowska
- STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell, Oxford, Didcot, Oxon, OX11 0QX, UK.,CenTACat, School of Chemistry and Chemical Engineering, Queen's University, Belfast, Stranmillis Road, BT9 5AG, UK
| | - Daniel T Bowron
- STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell, Oxford, Didcot, Oxon, OX11 0QX, UK
| | - Haresh G Manyar
- CenTACat, School of Chemistry and Chemical Engineering, Queen's University, Belfast, Stranmillis Road, BT9 5AG, UK
| | - Christopher Hardacre
- CenTACat, School of Chemistry and Chemical Engineering, Queen's University, Belfast, Stranmillis Road, BT9 5AG, UK.
| | - Tristan G A Youngs
- STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell, Oxford, Didcot, Oxon, OX11 0QX, UK.
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14
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Microstructure and concentration fluctuations in alcohol–Toluene and alcohol-Cyclohexane binary liquids: A small angle neutron scattering study. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.02.070] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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15
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Mesele OO, Vartia AA, Laage D, Thompson WH. Reorientation of Isomeric Butanols: The Multiple Effects of Steric Bulk Arrangement on Hydrogen-Bond Dynamics. J Phys Chem B 2015; 120:1546-59. [DOI: 10.1021/acs.jpcb.5b07692] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Oluwaseun O. Mesele
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Anthony A. Vartia
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Damien Laage
- Department
of Chemistry, Ecole Normale Supérieure, UMR ENS-CNRS-UPMC 8640, 24 rue Lhmond, 75005 Paris, France
| | - Ward H. Thompson
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
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16
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McCune JA, Turner AH, Coleman F, White CM, Callear SK, Youngs TGA, Swadźba-Kwaśny M, Holbrey JD. Association and liquid structure of pyridine–acetic acid mixtures determined from neutron scattering using a ‘free proton’ EPSR simulation model. Phys Chem Chem Phys 2015; 17:6767-77. [DOI: 10.1039/c4cp05746e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Hydrogen-bonded molecular acetic acid chains are observed in acid–base mixtures from small angle neutron diffraction.
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Affiliation(s)
- Jade A. McCune
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
| | - Adam H. Turner
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
| | - Fergal Coleman
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
| | - Caithlin M. White
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
| | | | | | - Małgorzata Swadźba-Kwaśny
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
| | - John D. Holbrey
- The QUILL Research Centre
- School of Chemistry and Chemical Engineering, Queen's University Belfast
- Belfast BT9 5AG
- UK
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17
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Egorov GI, Makarov DM. Bulk properties of a liquid phase mixture {ethylene glycol+tert-butanol} in the temperature range 278.15–348.15 K and pressures of 0.1–100 MPa. II. Molar isothermal compressibility, molar isobaric expansibility, thermal pressure coefficient, and internal pressure. J STRUCT CHEM+ 2014. [DOI: 10.1134/s002247661308012x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Egorov GI, Makarov DM. Bulk properties of a liquid phase mixture {ethylene glycol+tert-butanol} in the temperature range 278.15–348.15 K and pressures of 0.1-100 MPa. I. Experimental results, excess and partial molar volumes. J STRUCT CHEM+ 2014. [DOI: 10.1134/s0022476613080118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Abdel Hamid AR, Lefort R, Lechaux Y, Moréac A, Ghoufi A, Alba-Simionesco C, Morineau D. Solvation Effects on Self-Association and Segregation Processes in tert-Butanol–Aprotic Solvent Binary Mixtures. J Phys Chem B 2013; 117:10221-30. [DOI: 10.1021/jp402380f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- A. R. Abdel Hamid
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
| | - R. Lefort
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
| | - Y. Lechaux
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
| | - A. Moréac
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
| | - A. Ghoufi
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
| | - C. Alba-Simionesco
- Laboratoire Léon
Brillouin,
UMR 12, CEA-CNRS, F-91191 Gif-sur-Yvette,
France
| | - D. Morineau
- Institute
of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes,
France
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20
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Artola PA, Raihane A, Crauste-Thibierge C, Merlet D, Emo M, Alba-Simionesco C, Rousseau B. Limit of Miscibility and Nanophase Separation in Associated Mixtures. J Phys Chem B 2013; 117:9718-27. [DOI: 10.1021/jp3124499] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- P. A. Artola
- Laboratoire
de Chimie-Physique, Université de Paris-Sud, Orsay, France
| | - A. Raihane
- Laboratoire
Léon Brillouin, CNRS, CEA, Saclay,
France
| | | | - D. Merlet
- Institut de Chimie
Moléculaire
et des Matériaux d’Orsay, Université de Paris-Sud, Orsay, France
| | - M. Emo
- Institut J. Barriol, CNRS, Université de Lorraine, Vandoeuvre-lès-Nancy
cedex, France
| | | | - B. Rousseau
- Laboratoire de Chimie-Physique, Université de Paris-Sud, CNRS, Orsay, France
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21
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Sillrén P, Swenson J, Mattsson J, Bowron D, Matic A. The temperature dependent structure of liquid 1-propanol as studied by neutron diffraction and EPSR simulations. J Chem Phys 2013; 138:214501. [DOI: 10.1063/1.4807863] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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22
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Wilcox DS, Rankin BM, Ben-Amotz D. Distinguishing aggregation from random mixing in aqueous t-butyl alcohol solutions. Faraday Discuss 2013; 167:177-90. [DOI: 10.1039/c3fd00086a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Towey JJ, Soper AK, Dougan L. What happens to the structure of water in cryoprotectant solutions? Faraday Discuss 2013; 167:159-76. [DOI: 10.1039/c3fd00084b] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Bowron DT, Finney JL. Ion interactions with non-polar and amphiphilic solutes in water. Faraday Discuss 2013; 160:239-54; discussion 311-27. [DOI: 10.1039/c2fd20071f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Egorov GI, Makarov DM. Volumetric properties of the binary mixture of ethylene glycol+tert-butanol at T=(278.15, 288.15, 298.15, 308.15, 323.15, 333.15, 348.15) K under atmospheric pressure. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2012.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Egorov GI, Makarov DM. Volumetric Properties of Binary Mixtures of Glycerol + tert-Butanol over the Temperature Range 293.15 to 348.15 K at Atmospheric Pressure. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9813-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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Omelyan I, Kovalenko A, Hirata F. Compressibility oftert-Butyl Alcohol-Water Mixtures: The Rism Theory. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633603000501] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The isothermal compressibility χTof binary mixtures of water and tert-butyl alcohol (TBA) is calculated using the reference interaction site model (RISM) integral equation theory. The calculations are performed over the whole concentration from x = 0 to 1 and a wide temperature from T = 283 to 313 K ranges employing the extended point charge model for water and optimized site–site potentials for TBA molecules. The results obtained are compared versus available experimental data. It is demonstrated that, despite an approximate character of the model potentials and closure relation applied, the theory is able to reproduce qualitatively all main features of the x- and T-dependencies of χTinherent in real experiment. Such features include the decrease of compressibility with increasing T in the low TBA concentration limit x → 0 (pure water), and the increase of χTwith rising T in the opposite regime x → 1 (pure alcohol); the presence of a concentration region where the function χT(x, T) does not depend much on T; as well as the existence of a minimum in χTwith respect to x at each given T. The question of how to achieve a quantitative agreement between the theoretical and experimental values by correcting the closure relation is also discussed.
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Affiliation(s)
- Igor Omelyan
- Institute for Condensed Matter Physics, 1 Svientsitskii Street, UA-79011 Lviv, Ukraine
| | - Andriy Kovalenko
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Fumio Hirata
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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28
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Burton RC, Ferrari ES, Davey RJ, Finney JL, Bowron DT. The Relationship between Solution Structure and Crystal Nucleation: A Neutron Scattering Study of Supersaturated Methanolic Solutions of Benzoic Acid. J Phys Chem B 2010; 114:8807-16. [DOI: 10.1021/jp103099j] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. C. Burton
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - E. S. Ferrari
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - R. J. Davey
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - J. L. Finney
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - D. T. Bowron
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
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ZIMMERMANN D, HÄBER TH, SCHAAL H, SUHM MA. Hydrogen bonded rings, chains and lassos: the case of t-butyl alcohol clusters. Mol Phys 2009. [DOI: 10.1080/00268970010017009] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- D. ZIMMERMANN
- a Institut für Physikalische Chemie, Universität Göttingen , Tammannstr. 6, D-37077 , Göttingen , Germany
| | - TH. HÄBER
- a Institut für Physikalische Chemie, Universität Göttingen , Tammannstr. 6, D-37077 , Göttingen , Germany
| | - H. SCHAAL
- a Institut für Physikalische Chemie, Universität Göttingen , Tammannstr. 6, D-37077 , Göttingen , Germany
| | - M. A. SUHM
- a Institut für Physikalische Chemie, Universität Göttingen , Tammannstr. 6, D-37077 , Göttingen , Germany
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Burton RC, Ferrari ES, Davey RJ, Finney JL, Bowron DT. Relationship between Solution Structure and Phase Behavior: A Neutron Scattering Study of Concentrated Aqueous Hexamethylenetetramine Solutions. J Phys Chem B 2009; 113:5967-77. [DOI: 10.1021/jp811515u] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. C. Burton
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - E. S. Ferrari
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - R. J. Davey
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - J. L. Finney
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - D. T. Bowron
- Molecular Materials Centre, School of Chemical Engineering & Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, U.K., Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K., and ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
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Durov VA, Shilov IY, Tereshin OG. Modeling of Supramolecular Structure and Dielectric Properties of Butanols from Melting Point to Supercritical State. J Phys Chem B 2008; 112:8076-83. [DOI: 10.1021/jp710428n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir A. Durov
- Faculty of Chemistry, Moscow State University, Vorobyevy Gory, Moscow 119899, Russia
| | - Ignat Yu. Shilov
- Faculty of Chemistry, Moscow State University, Vorobyevy Gory, Moscow 119899, Russia
| | - Oleg G. Tereshin
- Faculty of Chemistry, Moscow State University, Vorobyevy Gory, Moscow 119899, Russia
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33
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Tóth G. Interactions from diffraction data: historical and comprehensive overview of simulation assisted methods. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2007; 19:335220. [PMID: 21694143 DOI: 10.1088/0953-8984/19/33/335220] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A large part of statistical mechanics is concerned with the determination of condensed matter structure on the basis of known microscopic interactions. An increasing emphasis has been put on the opposite situation in the last decades as well, where structural data, e.g. pair-distance statistics, are known from diffraction experiments, and one looks for the corresponding interaction functions. The solution of this inverse problem was searched for within the integral equation theories of condensed matter in the early investigations, but before long computer simulation assisted methods were suggested. The interest in this field showed an increasing trend after some attempts appeared in the late 1980s. Several methods were published in the 1990s, and one-two methods appear annually nowadays. In this paper a comprehensive and historical overview is given on the solution of the inverse problem with simulation assisted methods. Emphasis is put on the theoretical grounds of the methods, on the choice of possible input structural functions, on the numerically local or global schemes of the potential modifications, on some advantages and limits of the different methods and on the scientific impact of the methods.
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Affiliation(s)
- Gergely Tóth
- Institute of Chemistry, Eötvös University, H-1518 Budapest, PO Box 32, Budapest, Hungary
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34
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Stephenson S, Offeman R, Robertson G, Orts W. Hydrogen-bond networks in linear, branched and tertiary alcohols. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2007.03.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Palombo F, Tassaing T, Danten Y, Besnard M. Hydrogen bonding in liquid and supercritical 1-octanol and 2-octanol assessed by near and midinfrared spectroscopy. J Chem Phys 2006; 125:094503. [PMID: 16965093 DOI: 10.1063/1.2336424] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The near and midinfrared spectra of 1-octanol (and 2-octanol) have been measured along the liquid-gas coexistence curve from room temperature up to the critical point and in the supercritical domain along the isotherm T=385 degrees C (and T=365 degrees C) above the critical point of both 1-octanol and 2-octanol for pressure ranging from 0.5 up to 15 MPa. The density values of SC 1- and 2-octanol have been estimated by analysing the near infrared (NIR) spectra in the 3nu(a)(CH) region. A quantitative analysis of the absorption band associated with the OH stretching vibration [nu(OH)] and its first and second overtones [2nu(OH) and 3nu(OH)] was carried out in order to estimate the percentage of "free" OH groups in both alcohols in the whole thermodynamic domain investigated here. Very consistent results have been obtained from the independent analysis of these three different absorption bands which gave us a good confidence in the degree of hydrogen bonding reported here for 1- and 2-octanol. Thus, the percentage of free OH groups which is around 5% in liquid 1-octanol under ambient conditions strongly increase up to 70%-80% at a temperature of about 340 degrees C. Then, in the supercritical domain, upon a decrease of the density from 0.4 to 0.1 g cm(-3), the fraction of free hydroxyl groups is nearly constant presenting a plateaulike regime around 80%. As the density decreases again, this plateau regime is followed by a further increase of X(nb) which reaches a value of 96% for the system in the gaseous phase (0.01 g cm(-3); P=0.45 MPa). Finally, it comes out from this study that the percentage of free OH groups is always greater in 2-octanol than in 1-octanol at the same density.
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Affiliation(s)
- F Palombo
- Laboratoire de Physico-Chimie Moléculaire, CNRS (UMR 5803), Université Bordeaux I, 351 Cours de Ia Liberation, 33405 Talence Cedex, France
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36
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Stephenson S, Offeman R, Robertson G, Orts W. Ethanol and water capacities of alcohols: A molecular dynamics study. Chem Eng Sci 2006. [DOI: 10.1016/j.ces.2006.05.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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McLain SE, Soper AK, Luzar A. Orientational correlations in liquid acetone and dimethyl sulfoxide: A comparative study. J Chem Phys 2006; 124:74502. [PMID: 16497052 DOI: 10.1063/1.2170077] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structure of acetone and dimethyl sulfoxide in the liquid state is investigated using a combination of neutron diffraction measurements and empirical potential structure refinement (EPSR) modeling. By extracting the orientational correlations from the EPSR model, the alignment of dipoles in both fluids is identified. At short distances the dipoles or neighboring molecules are found to be in antiparallel configurations, but further out the molecules tend to be aligned predominately as head to tail in the manner of dipolar ordering. The distribution of these orientations in space around a central molecule is strongly influenced by the underlying symmetry of the central molecule. In both liquids there is evidence for weak methyl hydrogen to oxygen intermolecular contacts, though these probably do not constitute hydrogen bonds as such.
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Affiliation(s)
- Sylvia E McLain
- ISIS Facility, Rutherford Appleton Laboratories, Chilton, Didcot, UK.
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38
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Ferrari ES, Burton RC, Davey RJ, Gavezzotti A. Simulation of phase separation in alcohol/water mixtures using two-body force field and standard molecular dynamics. J Comput Chem 2006; 27:1211-9. [PMID: 16755646 DOI: 10.1002/jcc.20433] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Standard molecular dynamics simulations have been carried out on pure alcohols and alcohol/water mixtures. A simple atom-atom force field consisting of Lennard-Jones potentials plus coulombic terms over atomic point charges, but without explicit polarization terms, has been specifically fitted to reproduce several experimental properties of the pure alcohols, and has been used for mixtures by developing combination rules with the TIP3P water model. Densities, enthalpies of vaporization, radial distribution functions, self-diffusion coefficients, and rotational correlation functions of the pure alcohols are well reproduced and compare favorably with those from more sophisticated force fields. Some key aspects of the phase behaviour are correctly reproduced by the molecular dynamics simulation, showing a distinct demixing process for the n-butanol/water mixture as opposed to the stability of the t-butanol/water mixtures. The results demonstrate the ability of a molecular dynamics simulation, even in its standard form and with easily accessible time ranges, but with a carefully optimized force field, to simulate and, to a certain extent, predict the properties of binary mixtures.
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Affiliation(s)
- E S Ferrari
- School of Chemical Engineering and Analytical Science, University of Manchester, P.O. Box 88, Manchester M60 1QD, UK
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Bowron DT, Díaz Moreno S. The Structure of a Trimolecular Liquid: tert-Butyl Alcohol:Cyclohexene:Water. J Phys Chem B 2005; 109:16210-8. [PMID: 16853060 DOI: 10.1021/jp052912z] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structure of the trimolecular liquid mixture of 2:6:1 cyclohexene, tert-butyl alcohol, and water has been investigated using hydrogen/deuterium substitution neutron scattering techniques, and a three-dimensional structural model refined to be consistent with the experimental data has been built using the technique of Empirical Potential Structure Refinement. The model shows a well-mixed solution of the three molecular components where the competing interactions between the nonpolar cyclohexene and polar water molecules are balanced in the solution leading to largely pure-alcohol-like interactions between the tert-butyl alcohol molecules. Cyclohexene molecules favor direct solvation by alcohol methyl groups while water molecules are accommodated, dispersed throughout the solution, via hydrogen bonding interactions with the alcohol molecule hydroxyl groups. Rare occurrences of direct cyclohexene-water interactions are of the classic hydrophobic hydration type and no evidence is found for microscopic heterogeneity in the trimolecular mixture in contrast to the general findings for binary alcohol-water solutions.
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Affiliation(s)
- D T Bowron
- ISIS Facility, CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom.
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40
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Andanson JM, Soetens JC, Tassaing T, Besnard M. Hydrogen bonding in supercritical tert-butanol assessed by vibrational spectroscopies and molecular-dynamics simulations. J Chem Phys 2005; 122:174512. [PMID: 15910050 DOI: 10.1063/1.1886730] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated the state of aggregation in supercritical tert-butanol (T = 523 K,0.05 < rho < 0.4 g cm(-3)) by means of vibrational spectroscopies (infrared and Raman) and molecular-dynamics (MD) simulations. A quantitative band shape analysis of the spectra associated with the OH stretching mode of tert-butanol has been done using activities computed by ab initio calculations on small clusters. This allows us to determine the degree of hydrogen bonding and populations of oligomers. These latter quantities have been derived from MD simulations and very consistent results are found with experiments. These results show that hydrogen bond still exist in supercritical tert-butanol and that the fluid mainly consists of oligomers smaller than tetramers.
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Affiliation(s)
- J-M Andanson
- Laboratoire de Physico-Chimie Moléculaire, Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux 1 no 5803.351, Cours de la Libération, Talence, France
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41
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Nagy PI, Erhardt PW. Monte Carlo Simulations of the Solution Structure of Simple Alcohols in Water−Acetonitrile Mixtures. J Phys Chem B 2005; 109:5855-72. [PMID: 16851638 DOI: 10.1021/jp045570q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Monte Carlo simulations have been performed to explore the solution structure of ethyl, isopropyl, isobutyl, and tertiary butyl alcohols in pure water, pure acetonitrile, and different mixtures of the two solvents. The explicit solvent studies in NpT ensembles at T = 298 K illustrate that the solute "discriminates" the solvent's components and that the composition of the first solvation shell differs from that of the bulk solution. Since the polarizable continuum dielectric method (PCM) does not presently model the solvation of molecules with both polar and apolar sites in mixed protic solvents, we suggest a direction for further program development wherein a continuum dielectric method would accept more than one solvent and the solute sites would be solvated by user-defined solvent components. The prevailing solvation model will be determined upon the lowest free energy calculated for a particular solvation pattern of the solute having a specific conformational/tautomeric state. Characterization of equilibrium hydrogen-bond formation becomes a complicated problem that depends on the chemical properties of the solute and its conformation, as well as upon the varying nature of the first solvation shell. For example, while the number of hydrogen bonds to secondary and tertiary alcohol solutes are nearly constant in pure water and in water-acetonitrile mixtures with at least 50% water content, the number of hydrogen bonds to primary alcohols gradually decreases for most of their conformations when acetonitrile content is increased. Nonetheless, the calculations indicate that O-H...O(water) hydrogen bonds are still possible in a small fraction of the arrangements for the solution models with water content of 30% or less. The isopentene solute does not form any observable hydrogen bonds, despite having an electron-rich, double-bond site.
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Affiliation(s)
- Peter I Nagy
- Center for Drug Design and Development, College of Pharmacy, The University of Toledo, Toledo, OH 43606-3390, USA.
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42
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Sato T, Buchner R. Cooperative and molecular dynamics of alcohol/water mixtures: the view of dielectric spectroscopy. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.08.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Finney JL, Bowron DT. Experimental configurational landscapes in aqueous solutions. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2005; 363:469-492. [PMID: 15664894 DOI: 10.1098/rsta.2004.1503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Structures and interactions between molecules in solution are modulated by the solvent. Changes in solvent conditions can lead to structural changes and transitions such as the assembly processes seen in micelle formation and protein folding. In the case of even quite complex liquid systems, we can now explore experimentally the configurational energy landscapes that underlie these processes. Using an aqueous solution of an amphiphile as an example, the structural transitions induced by changes in temperature, concentration and added salt are examined at the molecular level, and some critical regions of the landscape identified. Moreover, the potentials of mean force that quantitatively describe the solvent-modulated interaction between molecules in solution can now be experimentally accessed.
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Affiliation(s)
- John L Finney
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK.
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44
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Bakó I, Schubert G, Megyes T, Pálinkás G, Swan GI, Dore J, Bellisent-Funel MC. Structural investigation of liquid formic acid by neutron diffraction. II: Isotopic substitution for DCOO[H/D]. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2004.07.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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45
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Bowron DT. Structure and interactions in simple solutions. Philos Trans R Soc Lond B Biol Sci 2004; 359:1167-79; discussion 1179-80. [PMID: 15306374 PMCID: PMC1693403 DOI: 10.1098/rstb.2004.1496] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Neutron scattering with hydrogen/deuterium isotopic substitution techniques has been used to investigate the full range of structural interactions in a dilute 0.02 mol fraction solution of tertiary butanol in water, both in the absence and in the presence of a small amount of sodium chloride. Emphasis is given to the detailed pictures of the intermolecular interactions that have been derived using the empirical potential structure refinement technique. Analysis has been performed to the level of the spatial density distribution functions that illustrate the orientational dependence of the intermolecular interactions between all combinations of molecular and ionic components. The results show the key structural motifs involved in the interactions between the various components in a complex aqueous system. They underline the structural versatility of the water molecule in accommodating a range of different kinds of interactions while retaining its characteristic first-neighbour interaction geometry. Within this framework, the results highlight the complex interplay between the polar, non-polar and charged molecular interactions that exist in the system.
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Affiliation(s)
- D T Bowron
- ISIS Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK.
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46
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Affiliation(s)
- Takaaki Sato
- Division of Pure and Applied Physics, Graduate School of Science and Engineering, Waseda University, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
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47
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Sato T, Buchner R. The cooperative dynamics of the H-bond system in 2-propanol/water mixtures: Steric hindrance effects of nonpolar head group. J Chem Phys 2003. [DOI: 10.1063/1.1620996] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Fanourgakis GS, Shi YJ, Consta S, Lipson RH. A spectroscopic and computer simulation study of butanol vapors. J Chem Phys 2003. [DOI: 10.1063/1.1605384] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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49
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Finney JL, Bowron DT, Daniel RM, Timmins PA, Roberts MA. Molecular and mesoscale structures in hydrophobically driven aqueous solutions. Biophys Chem 2003; 105:391-409. [PMID: 14499907 DOI: 10.1016/s0301-4622(03)00104-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Since Kauzmann's seminal 1959 paper, the hydrophobic interaction has dominated thinking on the forces that control protein folding and stability. Despite its wide importance in chemistry and biology, our understanding of this interaction at the molecular level remains poor, with little experimental evidence to support the idea of water ordering close to a non-polar group that is at the centre of the standard model for the source of the entropic driving force. Developments over recent years in neutron techniques now enable us to see directly how a non-polar group actually affects the molecular structure of the water in its immediate neighbourhood. On the basis of such work on aqueous solutions of small alcohols, the generally accepted standard model is found to be wanting, and alternative sources of the entropic driving force are suggested. Moreover, the fact that we can now follow changes in hydrogen bonding as the alcohol concentration is varied gives us the possibility of explaining the concentration dependence of the enthalpy of mixing. Complementary studies of solute association on the mesoscopic scale show a rich concentration and temperature behaviour, which reflects a complex balance of polar and non-polar interactions. Unravelling the detailed nature of this balance in simple aqueous amphiphiles may lead to a better understanding of the forces that control biomolecular structural stability and interactions.
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Affiliation(s)
- J L Finney
- Department of Physics and Astronomy, University College London, London, UK.
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50
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Bakó I, Grósz T, Pálinkás G, Bellissent-Funel MC. Ethylene glycol dimers in the liquid phase: A study by x-ray and neutron diffraction. J Chem Phys 2003. [DOI: 10.1063/1.1536163] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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