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Gallardo A, Guil JM, Lomba E, Almarza NG, Khatib SJ, Cabrillo C, Sanz A, Pires J. Adsorption of probe molecules in pillared interlayered clays: experiment and computer simulation. J Chem Phys 2014; 140:224701. [PMID: 24929408 DOI: 10.1063/1.4880962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In this paper we investigate the adsorption of various probe molecules in order to characterize the porous structure of a series of pillared interlayered clays (PILC). To that aim, volumetric and microcalorimetric adsorption experiments were performed on various Zr PILC samples using nitrogen, toluene, and mesitylene as probe molecules. For one of the samples, neutron scattering experiments were also performed using toluene as adsorbate. Various structural models are proposed and tested by means of a comprehensive computer simulation study, using both geometric and percolation analysis in combination with Grand Canonical Monte Carlo simulations in order to model the volumetric and microcalorimetric isotherms. On the basis of this analysis, we propose a series of structural models that aim at accounting for the adsorption experimental behavior, and make possible a microscopic interpretation of the role played by the different interactions and steric effects in the adsorption processes in these rather complex disordered microporous systems.
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Affiliation(s)
- A Gallardo
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain
| | - J M Guil
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain
| | - E Lomba
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain
| | - N G Almarza
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain
| | - S J Khatib
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain
| | - C Cabrillo
- Instituto de Estructura de la Materia, CSIC, Serrano 123, E-28006 Madrid, Spain
| | - A Sanz
- Instituto de Estructura de la Materia, CSIC, Serrano 123, E-28006 Madrid, Spain
| | - J Pires
- Centro de Química e Bioquímica da Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
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KOVALENKO ANDRIY, HIRATA FUMIO. TOWARDS A MOLECULAR THEORY FOR THE VAN DER WAALS–MAXWELL DESCRIPTION OF FLUID PHASE TRANSITIONS. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633602000282] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We briefly review developments of theories for phase transitions of molecular fluids and mixtures, from semi-phenomenological approaches providing equations of state with adjustable parameters to first-principles microscopic methods qualitatively correct for a variety of molecular models with realistic interaction potentials. We further present the generalization of the van der Waals–Maxwell description of fluid phase diagrams to account for chemical specificities of polar molecular fluids, such as hydrogen bonding. Our theory uses the reference interaction site model (RISM) integral equation approach complemented with the new closure we have proposed (KH approximation), successful over a wide range of density from gas to liquid. The RISM/KH theory is applied to the known three-site models of water, methanol, and hydrogen fluoride. It qualitatively reproduces their vapor-liquid phase diagrams and the structure in the gas as well as liquid phases, including hydrogen bonding. Furthermore, phase transitions of water and methanol sorbed in nanoporous carbon aerogel are described by means of the replica generalization of the RISM approach we have developed. The changes as compared to the bulk fluids are in agreement with simulations and experiment. The RISM/KH theory is promising for description of phase transitions in various associating fluids, in particular, electrolyte as well as non-electrolyte solutions and ionic liquids.
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Affiliation(s)
- 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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Kolombet VA. Calculation of the hydration energy of polyvalent metal ions by the RISM method. RUSS J INORG CHEM+ 2011. [DOI: 10.1134/s0036023611080110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kolombet VA. A study by RISM method of the features of the environment dielectric response on the hydration of monatomic ions. RUSS J GEN CHEM+ 2010. [DOI: 10.1134/s1070363210080062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Almarza NG, Gallardo A, Martín C, Guil JM, Lomba E. Topological considerations on microporous adsorption processes in simple models for pillared interlayered clays. J Chem Phys 2009; 131:244701. [PMID: 20059093 DOI: 10.1063/1.3273209] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The microporous structure of pillared interlayered clays is determined by their interlayer separation and the distribution of the pillars that separate their layers. The pillars provide stability to these quasi-two-dimensional high surface area materials. In this work we present a topological analysis of available and accessible volumes within various simple models of pillared interlayered clays. Each model is characterized by a distribution of pillars. Both fully ordered structures and disordered pillar distributions with either attractive or repulsive interpillar correlations are considered. Particular attention is paid to the problem of accessibility. In systems with similar degrees of porosity, even when cavities within each model might be able to host the same adsorbate molecules, their accessibility will strongly depend on the pillar distribution. The theoretical analysis presented in this work may facilitate the interpretation of experimental results, pointing out those quantities that are key to describe the texture of the porous material.
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Affiliation(s)
- N G Almarza
- Instituto de Química-Física Rocasolano, CSIC, Serrano 119, E-28006 Madrid, Spain.
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Dyer KM, Perkyns JS, Stell G, Pettitt BM. A molecular site-site integral equation that yields the dielectric constant. J Chem Phys 2008; 129:104512. [PMID: 19044929 PMCID: PMC2596637 DOI: 10.1063/1.2976580] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2008] [Accepted: 08/08/2008] [Indexed: 11/14/2022] Open
Abstract
Our recent derivation [K. M. Dyer et al., J. Chem. Phys. 127, 194506 (2007)] of a diagrammatically proper, site-site, integral equation theory using molecular angular expansions is extended to polar fluids. With the addition of atomic site charges we take advantage of the formal long-ranged potential field cancellations before renormalization to generate a set of numerically stable equations. Results for calculations in a minimal (spherical) angular basis set are presented for the radial distribution function, the first dipolar (110) projection, and the dielectric constant for two model diatomic systems. All results, when compared to experiment and simulation, are a significant quantitative and qualitative improvement over previous site-site theories. More importantly, the dielectric constant is not trivial and close to simulation and experiment.
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Affiliation(s)
- Kippi M Dyer
- Chemistry Department, University of Houston, Houston, Texas 77204-5003, USA
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Affiliation(s)
- Maxim V. Fedorov
- Unilever Centre for Molecular Science Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Alexei A. Kornyshev
- Department of Chemistry, Faculty of Natural Sciences, Imperial College London, SW7 2AZ London, UK
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Sumi T, Sekino H. An interaction site model integral equation study of molecular fluids explicitly considering the molecular orientation. J Chem Phys 2006; 125:34509. [PMID: 16863364 DOI: 10.1063/1.2215603] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We implemented an interaction site model integral equation for rigid molecules based on a density-functional theory where the molecular orientation is explicitly considered. In this implementation of the integral equation, multiple integral of the degree of freedom of the molecular orientation is performed using efficient quadrature methods, so that the site-site pair correlation functions are evaluated exactly in the limit of low density. We apply this method to Cl(2), HCl, and H(2)O molecular fluids that have been investigated by several integral equation studies using various models. The site-site pair correlation functions obtained from the integral equation are in good agreement with the one from a simulation of these molecules. Rotational invariant coefficients, which characterize the microscopic structure of molecular fluids, are determined from the integral equation and the simulation in order to investigate the accuracy of the integral equation.
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Affiliation(s)
- Tomonari Sumi
- Department of Knowledge-Based Information Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan.
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Kovalenko A, Truong TN. Thermochemistry of solvation: A self-consistent three-dimensional reference interaction site model approach. J Chem Phys 2000. [DOI: 10.1063/1.1313388] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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J. RICHARDI P. H. FRIES R. FISCHER. Liquid acetone and chloroform: a comparison between Monte Carlo simulation, molecular Ornstein-Zernike theory, and site-site Ornstein-Zernike theory. Mol Phys 1998. [DOI: 10.1080/002689798168628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Anta JA, Lomba E, Alvarez M, Lombardero M, Martín C. Gas−Liquid Coexistence Properties from Reference Hypernetted Chain Theory for Linear Polar Solvents. J Phys Chem B 1997. [DOI: 10.1021/jp9629708] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Anta JA, Lomba E, Alvarez M, Martı́n C, Lombardero M. Integral equation approaches to mixtures of atomic and molecular fluids. J Chem Phys 1997. [DOI: 10.1063/1.473372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bresme F, Abascal JLF, Lomba E. Theory and simulation of central force model potentials: Application to homonuclear diatomic molecules. J Chem Phys 1996. [DOI: 10.1063/1.472833] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Anta JA, Lomba E, Lombardero M, Martín C. Reference hypernetted chain theory for linear molecular fluids: A comprehensive study of the gas‐liquid coexistence. J Chem Phys 1996. [DOI: 10.1063/1.472243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ikeguchi M, Doi J. Direct numerical solution of the Ornstein–Zernike integral equation and spatial distribution of water around hydrophobic molecules. J Chem Phys 1995. [DOI: 10.1063/1.470587] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Alvarez M, Lomba E, Martín C, Lombardero M. Atom–atom structure factors of hydrogen halides: A molecular approach revisited. J Chem Phys 1995. [DOI: 10.1063/1.470044] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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