1
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Hanna FE, Hunter CA. Polarisation effects on the H-bond acceptor properties of sulfonamides. Chem Commun (Camb) 2024. [PMID: 39319689 DOI: 10.1039/d4cc03530e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2024]
Abstract
The strengths of H-bonding interactions in networks are affected by cooperativity between the interacting sites. Compounds with an intramolecular H-bond between a sulfonamide NH group and pyridine nitrogen were used to measure the magnitude of cooperative effects on intermolecular H-bonding interactions with the sulfonamide oxygen. X-ray crystallography and 1H NMR experiments confirm the presence of the intramolecular H-bond and show that it is maintained in the 1 : 1 complex formed with perfluoro-tert-butanol (PFTB) in n-octane solution. Association constants for formation of 1 : 1 complexes with PFTB were determined using UV/Vis absorption titrations for a series of compounds equipped with different pyridine groups. Substituents on the pyridine were used to tune the strength of the intramolecular H-bond and investigate the effects on the strength of the intermolecular H-bond. Electron-donating groups on the pyridine that increase the strength of the intramolecular H-bond were found to increase in the strength of the intermolecular interaction with PFTB. The results were used to determine the H-bond acceptor parameters, β, for the sulfonamide oxygen group, and the values show a linear relationship with the value of β for the pyridine nitrogen. The slope of this relationship corresponds to the cooperativity parameter, κ, which is +0.16. The positive cooperativity observed in H-bonded sulfonamides is comparable to the value measured previously for the amide group (κ = +0.20).
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Affiliation(s)
- Fergal E Hanna
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Christopher A Hunter
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
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2
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Hanna FE, Root AJ, Schade M, Hunter CA. Negative cooperativity in the formation of H-bond networks involving primary anilines. Chem Sci 2024; 15:12036-12041. [PMID: 39092127 PMCID: PMC11290332 DOI: 10.1039/d4sc03719g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 06/25/2024] [Indexed: 08/04/2024] Open
Abstract
Networks of H-bonds can show non-additive behaviour, where the strength of one interaction perturbs another. The magnitude of such cooperative effects can be quantified by measuring the effect of the presence of an intramolecular H-bond at one site on a molecule on the association constant for formation of an intermolecular H-bond at another site. This approach has been used to quantify the cooperativity associated with the interaction of a primary amine with two H-bond acceptors. A series of compounds that have an intramolecular H-bond between an aniline NH2 group and a pyridine nitrogen were prepared, using polarising substituents on the pyridine ring to vary the strength of the intramolecular H-bond. The presence of the intramolecular interaction was confirmed by X-ray crystallography in the solid state and NMR spectroscopy in n-octane solution. UV-vis absorption titrations were used to measure the association constants for formation of an intermolecular H-bond with tri-n-butyl phosphine oxide in n-octane. Electron-donating substituents on the pyridine ring, which increase the strength of the intramolecular H-bond, were found to decrease the strength of the intermolecular H-bond between the aniline and the phosphine oxide. The results were used to determine the H-bond donor parameters for the anilines, α, and there is a linear relationship between the values of α and the H-bond acceptor parameter of the pyridine group involved in the intramolecular H-bond, β. The slope of this relationship was used to determine the cooperativity parameter (κ = -0.10), which quantifies the negative allosteric cooperativity between the two H-bonding interactions. Calculated molecular electrostatic potential surfaces of the anilines quantitatively reproduce the experimental result, which suggests that effects are electrostatic in origin, either due to polarisation of the NH bonds or due to secondary electrostatic interactions between the two H-bond acceptors.
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Affiliation(s)
- Fergal E Hanna
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Alexander J Root
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Markus Schade
- Chemistry, Oncology R&D, AstraZeneca 1 Francis Crick Avenue Cambridge CB2 0AA UK
| | - Christopher A Hunter
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
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3
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Crum VF, Kubarych KJ. Nanoclustering in non-ideal ethanol/heptane solutions alters solvation dynamics. J Chem Phys 2024; 161:044507. [PMID: 39056386 DOI: 10.1063/5.0216746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 07/02/2024] [Indexed: 07/28/2024] Open
Abstract
Alcohol/alkane solutions widely used in chemical synthesis and as transportation fuels are highly non-ideal due to the nanoscale clustering of the amphiphilic alcohol molecules within the nonpolar alkanes. Besides impacting reactivity, such as combustion, non-ideal solutions are likely to exhibit unusual solvation dynamics on ultrafast time scales arising from the structurally heterogeneous nature of molecular-scale association. Using a convenient transition metal carbonyl vibrational probe [(C5H5)Mn(CO)3, CMT], linear absorption and nonlinear two-dimensional infrared (2D-IR) spectroscopy reveal composition-dependent solvation dynamics as reported by the frequency fluctuation correlation function in a series of ethanol/heptane solutions. Slow spectral diffusion with dilute ethanol indicates preferential solvation of the polar solute by the alcohol with a mechanism largely dominated by solvent exchange. Comparison with an ethanol/acetonitrile solution series yields no substantial preferential solvation or solvent exchange signatures in the linear or 2D-IR spectra. In ethanol/heptane solutions, increasing the ethanol concentration speeds up the solvation dynamics, which is largely consistent with a model that includes solvent exchange and single-solvent spectral diffusion. Detailed analysis of the deviation from the experimental time constants from the model's optimal parameters yields a remarkable resemblance of the concentration-weighted Kirkwood-Buff integrals for ethanol/heptane solutions. This trend indicates that solution non-ideality alters the spectral diffusion dynamics of the probe solute. Given that nanoscale clustering drives the non-ideality, these experiments reveal a dynamical consequence of nanoscale heterogeneity on the ultrafast dynamics of the solution. Refined understanding of the structural and dynamical aspects of mixed solvents will be necessary for predictive solution strategies in chemistry.
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Affiliation(s)
- Vivian F Crum
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109, USA
| | - Kevin J Kubarych
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109, USA
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Gupta S, Elliott JR, Anderko A, Crosthwaite J, Chapman WG, Lira CT. Current Practices and Continuing Needs in Thermophysical Properties for the Chemical Industry. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Sumnesh Gupta
- The Dow Chemical Company, 1254 Enclave Parkway, Houston, Texas 77077, United States
| | - J. Richard Elliott
- Chemical, Biomolecular, and Corrosion Engineering Department, University of Akron, Akron, Ohio 44325-3906, United States
| | - Andrzej Anderko
- OLI Systems, Inc., 2 Gatehall Drive, Suite 1D, Parsippany, New Jersey 07054, United States
| | - Jacob Crosthwaite
- The Dow Chemical Company, 1897 Building, Midland, Michigan 48667, United States
| | - Walter G. Chapman
- Chemical and Biomolecular Engineering Department, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Carl T. Lira
- Chemical Engineering & Materials Science, Michigan State University, East Lansing, Michigan 48824-2288, United States
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Chapman WG, Fouad WA. Beyond Flory–Huggins: Activity Coefficients from Perturbation Theory for Polar, Polarizable, and Associating Solvents to Polymers. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas77005, United States
| | - Wael A. Fouad
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran31261, Saudi Arabia
- Interdisciplinary Research Center for Refining & Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran31261, Saudi Arabia
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Lira CT, Elliott JR, Gupta S, Chapman WG. Wertheim’s Association Theory for Phase Equilibrium Modeling in Chemical Engineering Practice. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Carl T. Lira
- Chemical Engineering & Materials Science, Michigan State University, East Lansing, Michigan48824, United States
| | - J. Richard Elliott
- Chemical, Biomolecular, and Corrosion Engineering Department, University of Akron, Akron, Ohio44325-3906, United States
| | - Sumnesh Gupta
- The Dow Chemical Company, 1254 Enclave Parkway, Houston, Texas77077, United States
| | - Walter G. Chapman
- Chemical and Biomolecular Engineering Department, Rice University, 6100 Main Street, Houston, Texas77005, United States
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Elliott JR. Efficient Implementation of Wertheim’s Theory: 2. Master Equations for Asymmetric Solvation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Richard Elliott
- Chemical, Biomolecular, and Corrosion Engineering Department, University of Akron, Akron, Ohio 44325-3906, United States
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Kamil A, Fouad WA, Gupta SK, Chapman WG. Phase Equilibrium of Cross-Associating Mixtures Using Association Theory-Based Equation of State. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ahsan Kamil
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Wael A. Fouad
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
- Interdisciplinary Research Center for Refining & Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Sumnesh K. Gupta
- The Dow Chemical Company, 1254 Enclave Parkway, Houston, Texas 77077, United States
| | - Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
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9
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Bala AM, Liu R, Peereboom L, Lira CT. Applications of an Association Activity Coefficient Model, NRTL-PA, to Alcohol-Containing Mixtures. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aseel M. Bala
- Department of Chemical and Biomolecular Engineering, Lafayette College, Acopian Engineering Center, Easton, Pennsylvania 18042, United States
| | - Renming Liu
- Department of Chemical Engineering and Materials Science, Michigan State University, 428 S Shaw Ln, 2100 Engineering Building, East Lansing, Michigan 48824-1226, United States
| | - Lars Peereboom
- Department of Chemical Engineering and Materials Science, Michigan State University, 428 S Shaw Ln, 2100 Engineering Building, East Lansing, Michigan 48824-1226, United States
| | - Carl T. Lira
- Department of Chemical Engineering and Materials Science, Michigan State University, 428 S Shaw Ln, 2100 Engineering Building, East Lansing, Michigan 48824-1226, United States
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10
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Yousefi Seyf J, Asgari M. Parametrization of PC-SAFT EoS for Solvents Reviewed for Use in Pharmaceutical Process Design: VLE, LLE, VLLE, and SLE Study. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jaber Yousefi Seyf
- Department of Chemical Engineering, Hamedan University of Technology, 65155-579, Hamedan, Iran
| | - Mohammad Asgari
- Department of Chemical Engineering, Sharif University of Technology, 1458889694, Tehran, Iran
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11
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Chapman WG, Fouad WA. Activity Coefficients from an Equation of State: Novel Approach for Fast Phase Equilibrium Calculations. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03800] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Wael A. Fouad
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
- Interdisciplinary Research Center for Refining & Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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Haghmoradi A, Ballal D, Fouad WA, Wang L, Chapman WG. Combination of monovalent and divalent sites on an associating species: Application to water. AIChE J 2021. [DOI: 10.1002/aic.17146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Amin Haghmoradi
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
| | - Deepti Ballal
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
| | - Wael A. Fouad
- Department of Chemical Engineering King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia
| | - Le Wang
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
| | - Walter G. Chapman
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
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14
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Engelbrecht LDV, Farris R, Vasiliu T, Demurtas M, Piras A, Cesare Marincola F, Laaksonen A, Porcedda S, Mocci F. Theoretical and Experimental Study of the Excess Thermodynamic Properties of Highly Nonideal Liquid Mixtures of Butanol Isomers + DBE. J Phys Chem B 2021; 125:587-600. [PMID: 33428423 DOI: 10.1021/acs.jpcb.0c10076] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Binary alcohol + ether liquid mixtures are of significant importance as potential biofuels or additives for internal combustion engines and attract considerable fundamental interest as model systems containing one strongly H-bonded self-associating component (alcohol) and one that is unable to do so (ether), but that can interact strongly as a H-bond acceptor. In this context, the excess thermodynamic properties of these mixtures, specifically the excess molar enthalpies and volumes (HE and VE), have been extensively measured. Butanol isomer + di-n-butyl ether (DBE) mixtures received significant attention because of interesting differences in their VE, changing from negative (1- and isobutanol) to positive (2- and tert-butanol) with increasing alkyl group branching. With the aim of shedding light on the differences in alcohol self-association and cross-species H-bonding, considered responsible for the observed differences, we studied representative 1- and 2-butanol + DBE mixtures by molecular dynamics simulations and experimental excess property measurements. The simulations reveal marked differences in the self-association of the two isomers and, while supporting the existing interpretations of the HE and VE in a general sense, our results suggest, for the first time, that subtle changes in H-bonded topologies may contribute significantly to the anomalous volumetric properties of these mixtures.
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Affiliation(s)
- Leon de Villiers Engelbrecht
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Riccardo Farris
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Tudor Vasiliu
- Centre of Advanced Research in Bio-nanoconjugates and Biopolymers, Romanian Academy-Petru Poni (PP) Institute of Macromolecular Chemistry, 00487 Iasi, Romania
| | - Monica Demurtas
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Alessandra Piras
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Flaminia Cesare Marincola
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Aatto Laaksonen
- Centre of Advanced Research in Bio-nanoconjugates and Biopolymers, Romanian Academy-Petru Poni (PP) Institute of Macromolecular Chemistry, 00487 Iasi, Romania.,Department of Materials and Environmental Chemistry, Division of Physical Chemistry, Arrhenius Laboratory, Stockholm University (SU), 106 91 Stockholm, Sweden.,State Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University (NTU), 210009 Nanjing, China.,Department of Engineering Sciences and Mathematics, Division of Energy Science, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Silvia Porcedda
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
| | - Francesca Mocci
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio Sestu, Monserrato, 09042 Cagliari, Italy
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16
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NguyenHuynh D, Tran STK, Mai CTQ. Predicting the Phase Behavior of Alcohols, Aromatic Alcohols, and Their Mixtures Using the Modified Group-Contribution Perturbed-Chain Statistical Associating Fluid Theory. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03198] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong NguyenHuynh
- Petrovietnam Manpower Training College, No. 43 Road 30/4, Ward 9, Vung Tau City, 790000 Vietnam
| | - Siem T. K. Tran
- Petrovietnam Manpower Training College, No. 43 Road 30/4, Ward 9, Vung Tau City, 790000 Vietnam
| | - Chau T. Q. Mai
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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17
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Haghmoradi A, Chapman WG. Bond cooperativity and ring formation in hydrogen fluoride thermodynamic properties: A two-density formalism framework. J Chem Phys 2019; 150:174503. [PMID: 31067866 DOI: 10.1063/1.5079874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In this work, we develop a thermodynamic perturbation theory using a two-density formalism framework to model the bond cooperativity effect for associating hard sphere and Lennard-Jones fluids. The theory predictions are compared with Monte Carlo simulation results and they are in excellent agreement. We incorporate bond angle dependent ring formation into the theory to calculate hydrogen fluoride thermodynamic properties. The liquid density and vapor pressure obtained by the theory are in good agreement with the experimental data. Comparing the thermo-physical properties of hydrogen fluoride calculated by this theory with previous studies reveals the importance of bond angle dependent ring formation and cooperative hydrogen bonding to capture its anomalous behavior especially in the vapor phase. The cooperativity ratio obtained in our model is close to the values reported by previous quantum studies.
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Affiliation(s)
- Amin Haghmoradi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005-1892, USA
| | - Walter G Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005-1892, USA
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18
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Orzechowski K, Czarnecki M. Association of 1-hexanol in mixtures with n-hexane: Dielectric, near-infrared and DFT studies. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.157] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Danzer A, Enders S. Comparison of two modelling approaches for the interfacial tension of binary aqueous mixtures. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Cripwell JT, Smith SAM, Schwarz CE, Burger AJ. SAFT-VR Mie: Application to Phase Equilibria of Alcohols in Mixtures with n-Alkanes and Water. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jamie T. Cripwell
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Sonja A. M. Smith
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Cara E. Schwarz
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Andries J. Burger
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
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21
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Janzen T, Zhang S, Mialdun A, Guevara-Carrion G, Vrabec J, He M, Shevtsova V. Mutual diffusion governed by kinetics and thermodynamics in the partially miscible mixture methanol + cyclohexane. Phys Chem Chem Phys 2018; 19:31856-31873. [PMID: 29171844 DOI: 10.1039/c7cp06515a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To gain an understanding of the transport and thermodynamic behavior of the highly non-ideal mixture methanol + cyclohexane, three complementary approaches, i.e. experiment, molecular simulation and predictive equations, are employed. The temperature and composition dependence of different diffusion coefficients is studied around the miscibility gap at ambient pressure. On the one hand Fick diffusion coefficients are measured experimentally by interferometric probing and on the other hand Maxwell-Stefan diffusion coefficients and intradiffusion coefficients are sampled by equilibrium molecular dynamics simulation at five temperatures below the upper critical temperature of ∼319 K. The spinodal curve is determined from extrapolation of the experimental Fick diffusion coefficient data and compared to predictions from excess Gibbs energy models. It is found that these models are not capable to correctly describe the activity coefficients over the whole composition range of the studied mixture. Thus, different parameter sets for a modified Wilson model are used for calculations of the thermodynamic factor, which is needed to transform Maxwell-Stefan into Fick diffusion coefficients and vice versa. Further, predictive equations for the Maxwell-Stefan diffusion coefficient, which are based on intradiffusion coefficients, are compared to simulation results. Using different approaches provides a clearer understanding of the relations between kinetic and thermodynamic properties contributing to the diffusion behavior of partially miscible mixtures.
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Affiliation(s)
- Tatjana Janzen
- Thermodynamics and Energy Technology, University of Paderborn, 33098 Paderborn, Germany.
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22
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Predicting Solubility/Miscibility in Amorphous Dispersions: It Is Time to Move Beyond Regular Solution Theories. J Pharm Sci 2018; 107:24-33. [DOI: 10.1016/j.xphs.2017.09.030] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 11/22/2022]
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23
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Flores ME, Shibue T, Sugimura N, Nishide H, Moreno-Villoslada I. Aggregation Number in Water/n-Hexanol Molecular Clusters Formed in Cyclohexane at Different Water/n-Hexanol/Cyclohexane Compositions Calculated by Titration 1H NMR. J Phys Chem B 2017; 121:10285-10291. [DOI: 10.1021/acs.jpcb.7b08848] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mario E. Flores
- Instituto
de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 52017, Chile
| | | | | | | | - Ignacio Moreno-Villoslada
- Instituto
de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 52017, Chile
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Haghmoradi A, Wang L, Chapman WG. A new equation of state for associating Lennard–Jones fluids with two sites: small bond angle. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1197430] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Amin Haghmoradi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
| | - Le Wang
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
| | - Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
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25
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Fouad WA, Wang L, Haghmoradi A, Asthagiri D, Chapman WG. Understanding the Thermodynamics of Hydrogen Bonding in Alcohol-Containing Mixtures: Cross-Association. J Phys Chem B 2016; 120:3388-402. [DOI: 10.1021/acs.jpcb.5b12375] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wael A. Fouad
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Le Wang
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Amin Haghmoradi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - D. Asthagiri
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
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