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Mason PE, Martinek T, Fábián B, Vazdar M, Jungwirth P, Tichacek O, Duboué-Dijon E, Martinez-Seara H. Hydration of biologically relevant tetramethylammonium cation by neutron scattering and molecular dynamics. Phys Chem Chem Phys 2024; 26:3208-3218. [PMID: 38193286 PMCID: PMC10806622 DOI: 10.1039/d3cp05449g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 12/30/2023] [Indexed: 01/10/2024]
Abstract
Neutron scattering and molecular dynamics studies were performed on a concentrated aqueous tetramethylammonium (TMA) chloride solution to gain insight into the hydration shell structure of TMA, which is relevant for understanding its behavior in biological contexts of, e.g., properties of phospholipid membrane headgroups or interactions between DNA and histones. Specifically, neutron diffraction with isotopic substitution experiments were performed on TMA and water hydrogens to extract the specific correlation between hydrogens in TMA (HTMA) and hydrogens in water (HW). Classical molecular dynamics simulations were performed to help interpret the experimental neutron scattering data. Comparison of the hydration structure and simulated neutron signals obtained with various force field flavors (e.g. overall charge, charge distribution, polarity of the CH bonds and geometry) allowed us to gain insight into how sensitive the TMA hydration structure is to such changes and how much the neutron signal can capture them. We show that certain aspects of the hydration, such as the correlation of the hydrogen on TMA to hydrogen on water, showed little dependence on the force field. In contrast, other correlations, such as the ion-ion interactions, showed more marked changes. Strikingly, the neutron scattering signal cannot discriminate between different hydration patterns. Finally, ab initio molecular dynamics was used to examine the three-dimensional hydration structure and thus to benchmark force field simulations. Overall, while neutron scattering has been previously successfully used to improve force fields, in the particular case of TMA we show that it has only limited value to fully determine the hydration structure, with other techniques such as ab initio MD being of a significant help.
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Affiliation(s)
- Philip E Mason
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
| | - Tomas Martinek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
| | - Balázs Fábián
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
| | - Mario Vazdar
- Department of Mathematics, Informatics, and Cybernetics, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic
| | - Pavel Jungwirth
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
| | - Ondrej Tichacek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
| | - Elise Duboué-Dijon
- Université Paris Cité, CNRS, Laboratoire de Biochimie Théorique, 13 rue Pierre et Marie Curie, 75005 Paris, France
| | - Hector Martinez-Seara
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, 160 00 Praha 6, Czech Republic.
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2
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Li W, Liao S, Xiang Z, Huang M, Fu Z, Li L, Liang Z. Thermodynamic regulation over nano-heterogeneous structure of electrolyte solution to improve stability of flow batteries. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Khachatrian AA, Rakipov IT, Mukhametzyanov TA, Yakhvarov DG, Solomonov BN. Effect of cation structure on the formation of hydrogen bond between ionic liquids and solute molecules. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Biswas A, Priyadarsini A, Mallik BS. Dynamics and Spectral Response of Water Molecules around Tetramethylammonium Cation. J Phys Chem B 2019; 123:8753-8766. [DOI: 10.1021/acs.jpcb.9b05466] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aritri Biswas
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
| | - Adyasa Priyadarsini
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
| | - Bhabani S. Mallik
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
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5
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Physico-chemical properties of aqueous drug solutions: From the basic thermodynamics to the advanced experimental and simulation results. Int J Pharm 2018; 540:65-77. [PMID: 29412151 DOI: 10.1016/j.ijpharm.2018.01.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 11/20/2022]
Abstract
The physical chemical properties of aqueous solutions of model compounds are illustrated in relation to hydration and solubility issues by using three perspectives: thermodynamic, spectroscopic and molecular dynamics simulations. The thermodynamic survey of the fundamental backgrounds of concentration dependence and experimental solubility results show some peculiar behavior of aqueous solutions with several types of similar solutes. Secondly, the use of a variety of experimental spectroscopic devices, operating under different experimental conditions of dimension and frequency, has produced a large amount of structural and dynamic data on aqueous solutions showing the richness of the information produced, depending on where and how the experiment is carried out. Finally, the use of molecular dynamics computational work is presented to highlight how the different types of solute functional groups and surface topologies organize adjacent water molecules differently. The highly valuable contribution of computer simulation studies in providing molecular explanations for experimental deductions, either of a thermodynamic or spectroscopic nature, is shown to have changed the current knowledge of many aqueous solution processes. While this paper is intended to provide a collective view on the latest literature results, still the presentation aims at a tutorial explanation of the potentials of the three methodologies in the field of aqueous solutions of pharmaceutical molecules.
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Yonenaga K, Morita T, Nishikawa K, Koga Y. Effects of ionic liquid constituent cations, tetraalkylammoniums, on water studied by means of the “1-propanol probing methodology”. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Do guanidinium and tetrapropylammonium ions specifically interact with aromatic amino acid side chains? Proc Natl Acad Sci U S A 2017; 114:1003-1008. [PMID: 28096375 DOI: 10.1073/pnas.1618071114] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Many ions are known to affect the activity, stability, and structural integrity of proteins. Although this effect can be generally attributed to ion-induced changes in forces that govern protein folding, delineating the underlying mechanism of action still remains challenging because it requires assessment of all relevant interactions, such as ion-protein, ion-water, and ion-ion interactions. Herein, we use two unnatural aromatic amino acids and several spectroscopic techniques to examine whether guanidinium chloride, one of the most commonly used protein denaturants, and tetrapropylammonium chloride can specifically interact with aromatic side chains. Our results show that tetrapropylammonium, but not guanidinium, can preferentially accumulate around aromatic residues and that tetrapropylammonium undergoes a transition at ∼1.3 M to form aggregates. We find that similar to ionic micelles, on one hand, such aggregates can disrupt native hydrophobic interactions, and on the other hand, they can promote α-helix formation in certain peptides.
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8
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van der Vegt NFA, Haldrup K, Roke S, Zheng J, Lund M, Bakker HJ. Water-Mediated Ion Pairing: Occurrence and Relevance. Chem Rev 2016; 116:7626-41. [DOI: 10.1021/acs.chemrev.5b00742] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nico F. A. van der Vegt
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie and Center of Smart
Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse
10, 64287 Darmstadt, Germany
| | - Kristoffer Haldrup
- Physics
Department, NEXMAP Section, Technical University of Denmark, Fysikvej
307, 2800 Kongens
Lyngby, Denmark
| | - Sylvie Roke
- Laboratory
for Fundamental BioPhotonics, Institute of Bioengineering, and Institute
of Materials Science, School of Engineering, and Lausanne Centre for
Ultrafast Science, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Junrong Zheng
- College
of Chemistry and Molecular Engineering, Beijing National Laboratory
for Molecular Sciences, Peking University, Beijing 100871, China
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Mikael Lund
- Division
of Theoretical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Huib J. Bakker
- FOM Institute AMOLF, Science
Park 104, 1098 XG Amsterdam, The Netherlands
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Nilsson EJ, Alfredsson V, Bowron DT, Edler KJ. A neutron scattering and modelling study of aqueous solutions of tetramethylammonium and tetrapropylammonium bromide. Phys Chem Chem Phys 2016; 18:11193-201. [DOI: 10.1039/c6cp01389a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Tetrapropylammonium ions cluster and have less structured water arrangements whereas tetramethylammonium ions occur as single molecules with tetrahedral water arrangements.
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Affiliation(s)
| | | | - Daniel T. Bowron
- ISIS
- Science and Technology Facilities Council Rutherford Appleton Laboratory
- Didcot OX11 0QX
- UK
| | - Karen J. Edler
- Physical Chemistry
- KILU
- Lund University
- SE-22100 Lund
- Sweden
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10
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Humphreys EK, Allan PK, Welbourn RJL, Youngs TGA, Soper AK, Grey CP, Clarke SM. A Neutron Diffraction Study of the Electrochemical Double Layer Capacitor Electrolyte Tetrapropylammonium Bromide in Acetonitrile. J Phys Chem B 2015; 119:15320-33. [DOI: 10.1021/acs.jpcb.5b08248] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elizabeth K. Humphreys
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Phoebe K. Allan
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Gonville and Caius College, Trinity
Street, Cambridge CB2 1TA, United Kingdom
| | - Rebecca J. L. Welbourn
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- BP Institute, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, United Kingdom
| | - Tristan G. A. Youngs
- ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, United Kingdom
| | - Alan K. Soper
- ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, United Kingdom
| | - Clare P. Grey
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Stuart M. Clarke
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- BP Institute, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, United Kingdom
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11
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Bhowmik D, Malikova N, Mériguet G, Bernard O, Teixeira J, Turq P. Aqueous solutions of tetraalkylammonium halides: ion hydration, dynamics and ion-ion interactions in light of steric effects. Phys Chem Chem Phys 2015; 16:13447-57. [PMID: 24887596 DOI: 10.1039/c4cp01164c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular simulations have allowed us to probe the atomic details of aqueous solutions of tetramethylammonium (TMA) and tetrabutylammonium (TBA) bromide, across a wide range of concentrations (0.5 to 3-4 molal). We highlight the space-filling (TMA(+)) versus penetrable (TBA(+)) nature of these polyatomic cations and its consequence for ion hydration, ion dynamics and ion-ion interactions. A well-established hydration is seen for both TMA(+) and TBA(+) throughout the concentration range studied. A clear penetration of water molecules, as well as counterions, between the hydrocarbon arms of TBA(+), which remain in an extended configuration, is seen. Global rotation of individual TBA(+) points towards isolated rather than aggregated ions (from dilute up to 1 m concentration). Only for highly concentrated solutions, in which inter-penetration of adjacent TBA(+)s cannot be avoided, does the rotational time increase dramatically. From both structural and dynamic data we conclude that there is absence of hydrophobicity-driven cation-cation aggregation in both TMABr and TBABr solutions studied. The link between these real systems and the theoretical predictions for spherical hydrophobic solutes of varying size does not seem straightforward.
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Affiliation(s)
- Debsindhu Bhowmik
- Laboratoire Léon Brillouin, UMR CEA-CNRS 12, CEA Saclay, 91191 Gif-sur-Yvette, France
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12
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Water Dynamics in Aqueous Solutions of Tetra-n-alkylammonium Salts: Hydrophobic and Coulomb Interactions Disentangled. J Phys Chem B 2013; 117:15101-10. [DOI: 10.1021/jp4085734] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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13
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Mason PE, Neilson GW, Price DL, Saboungi ML, Brady JW. A new structural technique for examining ion-neutral association in aqueous solution. Faraday Discuss 2013; 160:161-70; discussion 207-24. [DOI: 10.1039/c2fd20081c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Huang N, Schlesinger D, Nordlund D, Huang C, Tyliszczak T, Weiss TM, Acremann Y, Pettersson LGM, Nilsson A. Microscopic probing of the size dependence in hydrophobic solvation. J Chem Phys 2012; 136:074507. [DOI: 10.1063/1.3684893] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Abstract
Modern biophysics has benefited greatly from the use of X-ray and neutron diffraction from ordered single crystals of proteins and other macromolecules to give highly detailed pictures of these molecules in the solid state. However, the most biologically relevant environments for these molecules are liquid solutions, and their liquid state properties are sensitive to details of the liquid structuring. The best experimental method for studying such structuring is also neutron diffraction, but of course, the inherent disorder of the liquid state means that these experiments cannot hope to achieve the level of informational detail available from single crystal diffraction. Nonetheless, recent advances in neutron beam intensity, beam stability, and detector sensitivity mean that it should be possible, at least in principle, to use such measurements to extract information about structuring in much more complex systems than have previously been studied. We describe a series of neutron diffraction studies of isotopically labeled molecules in aqueous solution which, when combined with results from computer simulations, can be used to extract conformational information of the hydration of the molecules themselves, essentially opening up new avenues of investigation in structural biology.
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16
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Mason PE, Neilson GW, Dempsey CE, Price DL, Saboungi ML, Brady JW. Observation of pyridine aggregation in aqueous solution using neutron scattering experiments and MD simulations. J Phys Chem B 2010; 114:5412-9. [PMID: 20369858 DOI: 10.1021/jp9097827] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Neutron diffraction with isotopic substitution (NDIS) experiments have been used to examine the structuring of aqueous solutions of pyridine. A new method is described for extracting the structure factors relating to intermolecular correlations from neutron scattering experiments on liquid solutions of complex molecular species. This approach performs experiments at different concentrations and exploits the intramolecular coordination number concentration invariance (ICNCI) to separate the internal and intermolecular contributions to the total intensities. The ability of this method to deconvolute molecular and intermolecular correlations is tested and demonstrated using simulated neutron scattering results predicted from molecular dynamics simulations of aqueous solutions of the polyatomic solute pyridine in which the inter- and intramolecular terms are known. The method is then implemented using neutron scattering measurements on solutions of pyridine. The results confirm that pyridine shows a significant propensity to aggregate in solution and demonstrate the prospects for the future application of the ICNCI approach to the study of large polyatomic solutes using next-generation neutron sources and detectors.
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Affiliation(s)
- Philip E Mason
- Department of Food Science, Stocking Hall, Cornell University, Ithaca, New York 14853, USA
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17
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Kustov AV. Thermodynamic properties of aqueous solutions of tetraalkylammonium salts: Dependence of the hydrophobic hydration effect on the cation size. RUSS J INORG CHEM+ 2009. [DOI: 10.1134/s0036023609020284] [Citation(s) in RCA: 2] [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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18
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Gribov EN, Krivobokov IM, Parkhomchuk EV, Okunev AG, Spoto G, Parmon VN. Transport properties of Nafion membranes modified with tetrapropylammonium ions for direct methanol fuel cell application. RUSS J ELECTROCHEM+ 2009. [DOI: 10.1134/s1023193509020116] [Citation(s) in RCA: 6] [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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19
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Krienke H, Vlachy V, Ahn-Ercan G, Bakó I. Modeling Tetraalkylammonium Halide Salts in Water: How Hydrophobic and Electrostatic Interactions Shape the Thermodynamic Properties. J Phys Chem B 2009; 113:4360-71. [DOI: 10.1021/jp8079588] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Hartmut Krienke
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93040 Regensburg, Germany, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000 Ljubljana, Slovenija, and Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri u. 59-67, H-1025 Budapest, Hungary
| | - Vojko Vlachy
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93040 Regensburg, Germany, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000 Ljubljana, Slovenija, and Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri u. 59-67, H-1025 Budapest, Hungary
| | - Gudrun Ahn-Ercan
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93040 Regensburg, Germany, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000 Ljubljana, Slovenija, and Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri u. 59-67, H-1025 Budapest, Hungary
| | - Imre Bakó
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93040 Regensburg, Germany, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000 Ljubljana, Slovenija, and Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri u. 59-67, H-1025 Budapest, Hungary
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20
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Mason PE, Dempsey CE, Vrbka L, Heyda J, Brady JW, Jungwirth P. Specificity of Ion−Protein Interactions: Complementary and Competitive Effects of Tetrapropylammonium, Guanidinium, Sulfate, and Chloride Ions. J Phys Chem B 2009; 113:3227-34. [DOI: 10.1021/jp8112232] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philip E. Mason
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Christopher E. Dempsey
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Luboš Vrbka
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Jan Heyda
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - John W. Brady
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Pavel Jungwirth
- Department of Food Science, Cornell University, Ithaca, New York 14853, Department of Biochemistry, Bristol University, Bristol BS8 1TD, U.K., Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, and Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
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21
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Kustov AV, Korolev VP. The enthalpies and heat capacities of hydration of ammonium and tetraalkylammonium bromides. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2006. [DOI: 10.1134/s0036024406010080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Jorge M, Auerbach SM, Monson PA. Modeling Spontaneous Formation of Precursor Nanoparticles in Clear-Solution Zeolite Synthesis. J Am Chem Soc 2005; 127:14388-400. [PMID: 16218634 DOI: 10.1021/ja052402i] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present a lattice model describing the formation of silica nanoparticles in the early stages of the clear-solution templated synthesis of silicalite-1 zeolite. Silica condensation/hydrolysis is modeled by a nearest-neighbor attraction, while the electrostatics are represented by an orientation-dependent, short-range interaction. Using this simplified model, we show excellent qualitative agreement with published experimental observations. The nanoparticles are identified as a metastable state, stabilized by electrostatic interactions between the negatively charged silica surface and a layer of organic cations. Nanoparticle size is controlled mainly by the solution pH, through nanoparticle surface charge. The size and concentration of the charge-balancing cation are found to have a negligible effect on nanoparticle size. Increasing the temperature allows for further particle growth by Ostwald ripening. We suggest that this mechanism may play a role in the growth of zeolite crystals.
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Affiliation(s)
- M Jorge
- Department of Chemical Engineering, University of Massachusetts, Amherst, MA 01003, USA
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23
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Sidhu KS, Goodfellow JM, Turner JZ. Effect of molecular shape and electrostatic interactions on the water layer around polar and apolar groups in solution. J Chem Phys 1999. [DOI: 10.1063/1.478699] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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