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Pressure weakening unusual-caged dynamics of La80Al20 metallic glass-forming liquid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Castiglione F, Saielli G, Mauri M, Simonutti R, Mele A. Xenon Dynamics in Ionic Liquids: A Combined NMR and MD Simulation Study. J Phys Chem B 2020; 124:6617-6627. [PMID: 32613834 PMCID: PMC8009510 DOI: 10.1021/acs.jpcb.0c03357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The
translational dynamics of xenon gas dissolved in room-temperature
ionic liquids (RTILs) is revealed by 129Xe NMR and molecular
dynamics (MD) simulations. The dynamic behavior of xenon gas loaded
in 1-alkyl-3-methylimidazolium chloride, [CnC1im]Cl (n = 6, 8, 10), and hexafluorophosphate,
[CnC1im][PF6] (n = 4, 6, 8, 10) has been determined by measuring the 129Xe diffusion coefficients and NMR relaxation times. The
analysis of the experimental NMR data demonstrates that, in these
representative classes of ionic liquids, xenon motion is influenced
by the length of the cation alkyl chain and anion type. 129Xe spin–lattice relaxation times are well described with a
monoexponential function, indicating that xenon gas in ILs effectively
experiences a single average environment. These experimental results
can be rationalized based on the analysis of classical MD trajectories.
The mechanism described here can be particularly useful in understanding
the separation and adsorption properties of RTILs.
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Affiliation(s)
- Franca Castiglione
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. Da Vinci, 32, 20133 Milano, Italy
| | - Giacomo Saielli
- CNR-Istituto per la Tecnologia delle Membrane, Unità di Padova, Via Marzolo, 1, 35131 Padova, Italy.,Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131 Padova, Italy
| | - Michele Mauri
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Roberto Cozzi, 53, 20125 Milano, Italy
| | - Roberto Simonutti
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Roberto Cozzi, 53, 20125 Milano, Italy
| | - Andrea Mele
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. Da Vinci, 32, 20133 Milano, Italy.,CNR-SCITEC Istituto di Scienze e Tecnologie Chimiche, Via A. Corti 12, 20133 Milano, Italy
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Saielli G. Computational Spectroscopy of Ionic Liquids for Bulk Structure Elucidation. ADVANCED THEORY AND SIMULATIONS 2018. [DOI: 10.1002/adts.201800084] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Giacomo Saielli
- CNR Institute on Membrane Technology; Unit of Padova; Via Marzolo 1-35131 Padova Italy
- Department of Chemical Sciences; University of Padova; Via Marzolo 1-35131 Padova Italy
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Frezzato D, Saielli G. Distribution and Dynamic Properties of Xenon Dissolved in the Ionic Smectic Phase of [C16mim][NO3]: MD Simulation and Theoretical Model. J Phys Chem B 2016; 120:2578-85. [DOI: 10.1021/acs.jpcb.5b12470] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Diego Frezzato
- Department
of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Giacomo Saielli
- CNR
Institute on Membrane Technology, Unit of Padova, Via Marzolo 1, 35131 Padova, Italy
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Saielli G. Fully Atomistic Simulations of the Ionic Liquid Crystal [C16mim][NO3]: Orientational Order Parameters and Voids Distribution. J Phys Chem B 2016; 120:2569-77. [DOI: 10.1021/acs.jpcb.5b12469] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giacomo Saielli
- CNR Institute
on Membrane
Technology and Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131 Padova, Italy
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