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In-situ Raman spectral investigation into hydrogen bonding characteristics of supercritical water. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Plazanet M, Morfin I, Honkimäki V, Buslaps T, Petrillo C, Sacchetti F. Hydrogen-bond network distortion of water in the soft confinement of Nafion membrane. J Chem Phys 2021; 154:244503. [PMID: 34241357 DOI: 10.1063/5.0049625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A Compton spectroscopy investigation is carried out in hydrated Nafion membranes, enabling identification of distortions in the hydrogen-bond distribution of the polymer hydrating water by means of the subtle changes reflected by the Compton profiles. Indeed, deformations of the Compton profiles are observed when varying hydration, and two different bonding kinds are associated with the water molecules: at low hydration, water surrounds the sulfonic groups, while on increasing hydration, water molecules occupy the interstitial cavities formed upon swelling of the membrane. The analysis is proposed in terms of averaged OH bond length variation. A sizable contraction of the OH distance is observed at low hydration (∼0.09 Å), while at higher hydration levels, the contraction is smaller (∼0.02 Å) and the OH bond length is closer to bulk water. An evaluation of the electron kinetic energy indicates that the spatial changes associated with the water distribution correspond to a consistent binding energy increase. Distinct temperature dependences of each water population are observed, which can be straightly related to water desorption into ice on cooling below the freezing point.
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Affiliation(s)
- M Plazanet
- LIPhy, University Grenoble-Alpes and CNRS, UMR5588 Grenoble, France
| | - I Morfin
- LIPhy, University Grenoble-Alpes and CNRS, UMR5588 Grenoble, France
| | | | | | - C Petrillo
- Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, I-06123 Perugia, Italy
| | - F Sacchetti
- Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, I-06123 Perugia, Italy
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Ono T, Watanabe M, Sato Y, Inomata H, Nakahara K, Itou M, Sakurai Y. A flow cell for measuring X-ray Compton scattering of liquid at temperatures up to 623 K and pressures up to 20 MPa. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:083106. [PMID: 27587099 DOI: 10.1063/1.4960706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A flow-type cell was developed for measuring Compton scattering spectra of heat-sensitive aqueous solution. Compton scattering spectra of water and ethanol were measured in the region from ambient conditions to 623 K and 20 MPa. Compton profiles derived from measurement with the flow-type cell were comparable with those in the literature. Results obtained from the flow-type cell showed that delocalization of electronic charge density of water and ethanol at high temperatures occurred. Delocalization of the electronic charge density of ethanol was greater than that of water at high temperature, which is consistent with the prior works that use proton NMR chemical shifts to describe hydrogen bonding.
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Affiliation(s)
- Takumi Ono
- Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-11-403, Aoba, Aramaki, Sendai 980-8579, Japan
| | - Masaru Watanabe
- Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-11-403, Aoba, Aramaki, Sendai 980-8579, Japan
| | - Yoshiyuki Sato
- Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-11-403, Aoba, Aramaki, Sendai 980-8579, Japan
| | - Hiroshi Inomata
- Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-11-403, Aoba, Aramaki, Sendai 980-8579, Japan
| | - Koichi Nakahara
- Suntory Global Innovation Center Limited Research Institute, Suntory World Research Center, 8-1-1 Seikadai, Seika-Cho, Soraku-Gun, Kyoto 619-0284, Japan
| | - Masayoshi Itou
- Japan Synchrotron Radiation Institute (JASRI), 1-1-1, Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5198, Japan
| | - Yoshiharu Sakurai
- Japan Synchrotron Radiation Institute (JASRI), 1-1-1, Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5198, Japan
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Koskelo J, Juurinen I, Ruotsalainen KO, McGrath MJ, Kuo IF, Lehtola S, Galambosi S, Hämäläinen K, Huotari S, Hakala M. Intra- and intermolecular effects on the Compton profile of the ionic liquid 1,3-dimethylimidazolium chloride. J Chem Phys 2014; 141:244505. [PMID: 25554165 DOI: 10.1063/1.4904278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a comprehensive simulation study on the solid-liquid phase transition of the ionic liquid 1,3-dimethylimidazolium chloride in terms of the changes in the atomic structure and their effect on the Compton profile. The structures were obtained by using ab initio molecular dynamics simulations. Chosen radial distribution functions of the liquid structure are presented and found generally to be in good agreement with previous ab initio molecular dynamics and neutron scattering studies. The main contributions to the predicted difference Compton profile are found to arise from intermolecular changes in the phase transition. This prediction can be used for interpreting future experiments.
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Affiliation(s)
- J Koskelo
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - I Juurinen
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - K O Ruotsalainen
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - M J McGrath
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-Orme des Merisiers, F-91191 Gif-sur-Yvette CEDEX, France
| | - I-F Kuo
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Lehtola
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - S Galambosi
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - K Hämäläinen
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - S Huotari
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - M Hakala
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
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Juurinen I, Galambosi S, Anghelescu-Hakala AG, Koskelo J, Honkimäki V, Hämäläinen K, Huotari S, Hakala M. Molecular-Level Changes of Aqueous Poly(N-isopropylacrylamide) in Phase Transition. J Phys Chem B 2014; 118:5518-23. [DOI: 10.1021/jp501913p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Iina Juurinen
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
| | - Szabolcs Galambosi
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
| | - Adina G. Anghelescu-Hakala
- VTT Technical Research Centre of Finland, Patruunantie 19, FI-05200, Rajamäki, Finland
- Department
of Chemistry, Laboratory of Polymer Chemistry, University of Helsinki, P.O.B. 55, FI-00014, Helsinki, Finland
| | - Jaakko Koskelo
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
| | - Veijo Honkimäki
- European Synchrotron Radiation Facility, F-38043, Grenoble Cedex 9, France
| | - Keijo Hämäläinen
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
| | - Simo Huotari
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
| | - Mikko Hakala
- Department
of Physics, University of Helsinki, P.O.B. 64, FI-00014, Helsinki, Finland
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Lehtola S, Manninen P, Hakala M, Hämäläinen K. Contraction of completeness-optimized basis sets: Application to ground-state electron momentum densities. J Chem Phys 2013; 138:044109. [DOI: 10.1063/1.4788635] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Susi Lehtola
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 University of Helsinki, Finland.
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Lehtola J, Manninen P, Hakala M, Hämäläinen K. Completeness-optimized basis sets: Application to ground-state electron momentum densities. J Chem Phys 2012; 137:104105. [DOI: 10.1063/1.4749272] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Herrero CP, Ramírez R. High-density amorphous ice: A path-integral simulation. J Chem Phys 2012; 137:104505. [DOI: 10.1063/1.4750027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Juurinen I, Nakahara K, Ando N, Nishiumi T, Seta H, Yoshida N, Morinaga T, Itou M, Ninomiya T, Sakurai Y, Salonen E, Nordlund K, Hämäläinen K, Hakala M. Measurement of two solvation regimes in water-ethanol mixtures using x-ray compton scattering. PHYSICAL REVIEW LETTERS 2011; 107:197401. [PMID: 22181642 DOI: 10.1103/physrevlett.107.197401] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 06/17/2011] [Indexed: 05/31/2023]
Abstract
Water-ethanol mixtures exhibit interesting anomalies in their macroscopic properties. Despite a lot of research, the origin of the anomalies and the microscopic structure itself is still far from completely known. We have utilized the synchrotron x-ray Compton scattering technique to elucidate the structure of aqueous ethanol from a new experimental perspective. The technique is uniquely sensitive to the local molecular geometries at the angstrom and subangstrom scales. The experiments reveal two distinct mixing regimes in terms of geometry: the dilute 5 mol % and the concentrated >15 mol % regimes. By comparing with pure liquids, the former regime is characterized by an intramolecular and the latter by an intermolecular change. The findings bring new light to evaluating the hypothesis of formation of clathratelike structures at the dilute concentrations.
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Affiliation(s)
- I Juurinen
- Department of Physics, PO Box 64, FI-00014 University of Helsinki, Finland
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Herrero CP, Ramírez R. Isotope effects in ice Ih: A path-integral simulation. J Chem Phys 2011; 134:094510. [DOI: 10.1063/1.3559466] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Lehtola J, Hakala M, Vaara J, Hämäläinen K. Calculation of isotropic Compton profiles with Gaussian basis sets. Phys Chem Chem Phys 2011; 13:5630-41. [DOI: 10.1039/c0cp02269a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ramírez R, Herrero CP. Quantum path integral simulation of isotope effects in the melting temperature of ice Ih. J Chem Phys 2010; 133:144511. [DOI: 10.1063/1.3503764] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Pennanen TS, Lantto P, Hakala M, Vaara J. Nuclear magnetic resonance parameters in water dimer. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0782-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hakala M, Nygård K, Vaara J, Itou M, Sakurai Y, Hämäläinen K. Charge localization in alcohol isomers studied by Compton scattering. J Chem Phys 2009; 130:034506. [DOI: 10.1063/1.3059421] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fister TT, Seidler GT, Shirley EL, Vila FD, Rehr JJ, Nagle KP, Linehan JC, Cross JO. The local electronic structure of alpha-Li3N. J Chem Phys 2008. [PMID: 18681665 DOI: 10.1103/physrevb.79.174117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023] Open
Abstract
New theoretical and experimental investigations of the occupied and unoccupied local electronic densities of states (DOS) are reported for alpha-Li(3)N. Band-structure and density-functional theory calculations confirm the absence of covalent bonding character. However, real-space full-multiple-scattering (RSFMS) calculations of the occupied local DOS find less extreme nominal valences than have previously been proposed. Nonresonant inelastic x-ray scattering, RSFMS calculations, and calculations based on the Bethe-Salpeter equation are used to characterize the unoccupied electronic final states local to both the Li and N sites. There is a good agreement between experiment and theory. Throughout the Li 1s near-edge region, both experiment and theory find strong similarities in the s-and p-type components of the unoccupied local final DOS projected onto an orbital angular momentum basis (l-DOS). An unexpected, significant correspondence exists between the near-edge spectra for the Li 1s and N 1s initial states. We argue that both spectra are sampling essentially the same final DOS due to the combination of long core-hole lifetimes, long photoelectron lifetimes, and the fact that orbital angular momentum is the same for all relevant initial states. Such considerations may be generally applicable for low atomic number compounds.
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Affiliation(s)
- T T Fister
- Physics Department, University of Washington, Seattle, Washington 98195, USA
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Nygård K, Hakala M, Manninen S, Itou M, Sakurai Y, Hämäläinen K. Configurational energetics in ice ih probed by compton scattering. PHYSICAL REVIEW LETTERS 2007; 99:197401. [PMID: 18233110 DOI: 10.1103/physrevlett.99.197401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Indexed: 05/25/2023]
Abstract
Temperature-induced changes in the ground-state electron momentum density of polycrystalline ice Ih are studied with high accuracy by Compton scattering utilizing synchrotron radiation. A unique feasibility of the technique to provide direct experimental information on configurational enthalpies and heat capacities is demonstrated. The configurational enthalpy, obtained with an accuracy of 1.5 meV, evolves linearly with temperature above T=100 K. Consequently the configurational heat capacity is found to be constant, c{p}{config}=(0.44+/-0.11) J g{-1} K-1, in this temperature regime. Obtaining these quantities experimentally is fundamentally important for evaluating the accuracy of molecular-dynamics simulations schemes.
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Affiliation(s)
- K Nygård
- Division of X-Ray Physics, Department of Physical Sciences, FI-00014, University of Helsinki, Finland.
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Nygård K, Hakala M, Pylkkänen T, Manninen S, Buslaps T, Itou M, Andrejczuk A, Sakurai Y, Odelius M, Hämäläinen K. Isotope quantum effects in the electron momentum density of water. J Chem Phys 2007; 126:154508. [PMID: 17461648 DOI: 10.1063/1.2723093] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The isotope quantum effects in the ground-state electron momentum density of water are studied at temperatures ranging from 5 to 90 degrees C by combining Compton scattering experiments utilizing synchrotron radiation and computational analysis within density functional theory. We observe clear differences in the momentum density between normal and heavy water at room temperature, which are interpreted as predominantly reflecting intramolecular structural differences. The changes in the momentum density upon increasing the temperature are found to be larger for heavy than for normal water, which is attributed primarily to temperature-induced intramolecular structural effects. Both model computations and an ab initio approach qualitatively reproduce the changes in the momentum density as a function of temperature.
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Affiliation(s)
- K Nygård
- Division of X-ray Physics, Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.
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Leetmaa M, Ljungberg M, Ogasawara H, Odelius M, Näslund LA, Nilsson A, Pettersson LGM. Are recent water models obtained by fitting diffraction data consistent with infrared/Raman and x-ray absorption spectra? J Chem Phys 2007; 125:244510. [PMID: 17199358 DOI: 10.1063/1.2408419] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
X-ray absorption (XA) spectra have been computed based on water structures obtained from a recent fit to x-ray and neutron diffraction data using models ranging from symmetrical to asymmetrical local coordination of the water molecules [A. K. Soper, J. Phys.: Condens. Matter 17, S3273 (2005)]. It is found that both the obtained symmetric and asymmetric structural models of water give similar looking XA spectra, which do not match the experiment. The fitted models both contain unphysical structures that are allowed by the diffraction data, where, e.g., hydrogen-hydrogen interactions may occur. A modification to the asymmetric model, in which the non-hydrogen-bonded OH intramolecular distance is allowed to become shorter while the bonded OH distance becomes longer, improves the situation somewhat, but the overall agreement is still unsatisfactory. The electric field (E-field) distributions and infrared (IR) spectra are also calculated using two established theoretical approaches, which, however, show significant discrepancies in their predictions for the asymmetric structural models. Both approaches predict the Raman spectrum of the symmetric model fitted to the diffraction data to be significantly blueshifted compared to experiment. At the moment no water model exists that can equally well describe IR/Raman, x-ray absorption spectroscopy, and diffraction data.
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Affiliation(s)
- Mikael Leetmaa
- Fysikum, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden
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