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Lu C, Chen Z, Wu Y, Zhang Y, Wang F, Hu C, Qu J. Response of Ionic Hydration Structure and Selective Transport Behavior to Aqueous Solution Chemistry during Nanofiltration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11791-11801. [PMID: 38871647 DOI: 10.1021/acs.est.4c01783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
The effect of aqueous solution chemistry on the ionic hydration structure and its corresponding nanofiltration (NF) selectivity is a research gap concerning ion-selective transport. In this study, the hydration distribution of two typical monovalent anions (Cl- and NO3-) under different aqueous solution chemical conditions and the corresponding transmembrane selectivity during NF were investigated by using in situ liquid time-of-flight secondary ion mass spectrometry in combination with molecular dynamics simulations. We demonstrate the inextricable link between the ion hydration structure and the pore steric effect and further find that ionic transmembrane transport can be regulated by breaking the balance between the hydrogen bond network (i.e., water-water) and ion hydration (i.e., ion-water) interactions of hydrated ion. For strongly hydrated (H2O)nCl- with more intense ion-water interactions, a higher salt concentration and coexisting ion competition led to a larger hydrated size and, thus, a higher ion rejection by the NF membrane, whereas weakly hydrated (H2O)nNO3- takes the reverse under the same conditions. Stronger OH--anion hydration competition resulted in a smaller hydrated size of (H2O)nCl- and (H2O)nNO3-, showing a lower observed average hydration number at pH 10.5. This study deepens the long-overlooked understanding of NF separation mechanisms, concerning the hydration structure.
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Affiliation(s)
- Chenghai Lu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhibin Chen
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - You Wu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanyan Zhang
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fuyi Wang
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chengzhi Hu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiuhui Qu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Martínez JA, Langguth IC, Olivenza-León D, Morgenstern K. The structure-giving role of Rb + ions for water-ice nanoislands supported on Cu(111). Phys Chem Chem Phys 2024; 26:13667-13674. [PMID: 38563329 DOI: 10.1039/d3cp05968e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We characterize the effect of rubidium ions on water-ice nanoislands in terms of area, fractal dimension, and apparent height by low-temperature scanning tunneling microscopy. Water nanoislands on the pristine Cu(111) surface are compared to those at similar coverage on a Rb+ pre-covered Cu(111) surface to reveal the structure-giving effect of Rb+. The presence of Rb+ induces changes in the island shape, and hence, the water network, without affecting the nanoisland volume. The broad area distribution shifts to larger values while the height decreases from three bilayers to one or two bilayers. The nanoislands on the Rb+ pre-covered surface are also more compact, reflected in a shift in the fractal dimension distribution. We relate the changes to a weakening of the hydrogen-bond network by Rb+.
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Affiliation(s)
- Javier A Martínez
- Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, Havana 10400, Cuba.
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
| | - Inga C Langguth
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
| | - David Olivenza-León
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
| | - Karina Morgenstern
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
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3
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Nagasaka M. Probing Isolated Water Molecules in Aqueous Acetonitrile Solutions Using Oxygen K-Edge X-ray Absorption Spectroscopy. J Phys Chem Lett 2024:5165-5170. [PMID: 38713030 DOI: 10.1021/acs.jpclett.4c01087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Oxygen K-edge X-ray absorption spectroscopy (XAS) of an aqueous acetonitrile solution exhibited a sharp peak at approximately 537 eV, which was similar to that of water vapor and was not observed in liquid water. The inner-shell spectra of isolated water molecules and water clusters of different sizes surrounded by acetonitrile molecules were obtained by extracting these water structures from the liquid structures of aqueous acetonitrile solutions, as calculated using molecular dynamics simulations. The sharp peak profiles of the O K-edge XAS spectra were derived not from water clusters but from isolated water molecules surrounded by acetonitrile molecules. The present study proposes that isolated water molecules are easily formed in aqueous acetonitrile solutions and that the electronic structures of the isolated water molecules can be analyzed using O K-edge XAS spectra, which separates the contributions of small water clusters.
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Affiliation(s)
- Masanari Nagasaka
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
- Graduate Institute for Advanced Studies, SOKENDAI, Myodaiji, Okazaki 444-8585, Japan
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4
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Bewernitz MA, Ginder-Vogel M, Wolf SE, Seto J, Constantz BR. A bicarbonate-rich liquid condensed phase in non-saturated solutions in the absence of divalent cations. Front Bioeng Biotechnol 2024; 12:1382047. [PMID: 38745842 PMCID: PMC11091711 DOI: 10.3389/fbioe.2024.1382047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 04/02/2024] [Indexed: 05/16/2024] Open
Abstract
Bicarbonate (HCO3 -) and sodium (Na+)-containing solutions contain droplets of a separate, bicarbonate-rich liquid condensed phase (LCP) that have higher concentrations of HCO3 - relative to the bulk solution in which they reside. The existence and composition of the LCP droplets has been investigated by nanoparticle tracking analysis, nuclear magnetic resonance spectroscopy, refractive index measurements and X-ray pair distribution function analysis. The bicarbonate-rich LCP species is a previously unaccounted-for, ionic phenomenon which occurs even in solutions with solely monovalent cations. Its existence requires re-evaluation of models used to describe and model aqueous solution physicochemistry, especially those used to describe and model carbonate mineral formation.
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Affiliation(s)
- Mark A. Bewernitz
- Physical Sciences Department, College of Arts and Sciences, Embry-Riddle Aeronautical University, Daytona Beach, FL, United States
| | - Matthew Ginder-Vogel
- Environmental Chemistry and Technology Program, Department of Civil and Environmental Engineering, University of Wisconsin—Madison, Madison, WI, United States
| | - Stephan E. Wolf
- Department of Materials Science and Engineering, Institute of Glass and Ceramics, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Jong Seto
- Center for Biological Physics and School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, United States
| | - Brent R. Constantz
- Physical Sciences Department, College of Arts and Sciences, Embry-Riddle Aeronautical University, Daytona Beach, FL, United States
- Blue Planet, Ltd., Los Gatos, CA, United States
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5
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Chialvo AA. On the Elusive Links between Solution Microstructure, Dynamics, and Solvation Thermodynamics: Demystifying the Path through a Bridge over Troubled Conjectures and Misinterpretations. J Phys Chem B 2023; 127:10792-10813. [PMID: 38060479 DOI: 10.1021/acs.jpcb.3c04707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
We build a fundamentally based bridge between the solute-induced microstructural perturbation of the species environment and the dynamic as well as thermodynamic responses of the fluid system, regardless of the state conditions, composition, nature of the solvent, and either the magnitude or the type of solute-solvent intermolecular-interaction asymmetries. For that purpose, we advance a fluctuation-based solvation formalism of fluid mixtures to provide meaningful descriptors of solvation phenomena, the microstructural signatures of their solute-solvent intermolecular interaction asymmetry, and the thermodynamic manifestations linked to the solution nonideality. The rigorous foundations afford us to address some crucial issues frequently invoked in the literature including the microstructural perturbation domain, its proper identification and molecular-based meaning toward the interpretation of the solvation process, and the potential impact of the local differential behavior between anions and cations on the actual salt-induced perturbation of the solvent microstructure. Indeed, we link the precisely characterized species solvation behavior to fundamental thermodynamic residual-property relations, and the dynamics associated with either the viscous flow or diffusive behavior of the solvent, to finally illustrate their outcome with experimental data of aqueous electrolyte solutions from the available literature. Ultimately, this effort provides a highly desirable unambiguous identification of the cause-effect connections between the microstructurally perturbed domains and the experimentally measured macroscopic solvation properties, including their effect on the dynamics of the solvent environment. More importantly, it lends a well-established solvation framework to bridge rigorously the microstructural details of the mixture, its dynamics, and its solvation thermodynamics to enhance our understanding of well-defined ranked Hofmeister series, i.e., by avoiding ad hoc conjectures and unsupported microscopic interpretations of solvation phenomena.
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Affiliation(s)
- Ariel A Chialvo
- Retired Scientist, Knoxville, Tennessee 37922-3108, United States
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6
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Shi R, Cooper AJ, Tanaka H. Impact of hierarchical water dipole orderings on the dynamics of aqueous salt solutions. Nat Commun 2023; 14:4616. [PMID: 37550299 PMCID: PMC10406952 DOI: 10.1038/s41467-023-40278-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 07/13/2023] [Indexed: 08/09/2023] Open
Abstract
Ions exhibit highly ion-specific complex behaviours when solvated in water, which remains a mystery despite the fundamental importance of ion solvation in nature, science, and technology. Here we explain these ion-specific properties by the ion-induced hierarchical dipolar, translational, and bond-orientational orderings of ion hydration shell under the competition between ion-water electrostatic interactions and inter-water hydrogen bonding. We first characterise this competition by a new length λHB(q), explaining the ion-specific effects on solution dynamics. Then, by continuously tuning ion size and charge, we find that the bond-orientational order of the ion hydration shell highly develops for specific ion size and charge combinations. This ordering drastically stabilises the hydration shell; its degree changes the water residence time around ions by 11 orders of magnitude for main-group ions. These findings are fundamental to ionic processes in aqueous solutions, providing a physical principle for electrolyte design and application.
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Affiliation(s)
- Rui Shi
- Zhejiang Province Key Laboratory of Quantum Technology and Device, School of Physics, Zhejiang University, Hangzhou, 310027, China.
- Department of Fundamental Engineering, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Anthony J Cooper
- Department of Fundamental Engineering, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
- Department of Physics, University of California, Santa Barbara, CA, 93106-9530, USA
| | - Hajime Tanaka
- Department of Fundamental Engineering, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
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7
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Caruso A, Zhu X, Fulton JL, Paesani F. Accurate Modeling of Bromide and Iodide Hydration with Data-Driven Many-Body Potentials. J Phys Chem B 2022; 126:8266-8278. [PMID: 36214512 DOI: 10.1021/acs.jpcb.2c04698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ion-water interactions play a central role in determining the properties of aqueous systems in a wide range of environments. However, a quantitative understanding of how the hydration properties of ions evolve from small aqueous clusters to bulk solutions and interfaces remains elusive. Here, we introduce the second generation of data-driven many-body energy (MB-nrg) potential energy functions (PEFs) representing bromide-water and iodide-water interactions. The MB-nrg PEFs use permutationally invariant polynomials to reproduce two-body and three-body energies calculated at the coupled cluster level of theory, and implicitly represent all higher-body energies using classical many-body polarization. A systematic analysis of the hydration structure of small Br-(H2O)n and I-(H2O)n clusters demonstrates that the MB-nrg PEFs predict interaction energies in quantitative agreement with "gold standard" coupled cluster reference values. Importantly, when used in molecular dynamics simulations carried out in the isothermal-isobaric ensemble for single bromide and iodide ions in liquid water, the MB-nrg PEFs predict extended X-ray absorption fine structure (EXAFS) spectra that accurately reproduce the experimental spectra, which thus allows for characterizing the hydration structure of the two ions with a high level of confidence.
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Affiliation(s)
- Alessandro Caruso
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - Xuanyu Zhu
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - John L Fulton
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
| | - Francesco Paesani
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California92093, United States.,Materials Science and Engineering, University of California San Diego, La Jolla, California92093, United States.,San Diego Supercomputer Center, University of California San Diego, La Jolla, California92093, United States
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8
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Sun K, Nguyen CV, Nguyen NN, Nguyen AV. Flotation surface chemistry of water-soluble salt minerals: from experimental results to new perspectives. Adv Colloid Interface Sci 2022; 309:102775. [PMID: 36152375 DOI: 10.1016/j.cis.2022.102775] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 09/12/2022] [Accepted: 09/12/2022] [Indexed: 11/18/2022]
Abstract
The flotation separation of water-soluble salt minerals has to be conducted under the condition of saturation in brines which represents a challenging but exciting topic of colloid and surface chemistry. Despite several proposals on explaining the success of this industrial application for many decades, our understanding of the flotation separation is still far from complete yet, owing to the complexity of the highly selective collection of salt crystals by air bubbles in brines. Here, we thoroughly review the experimental results for halogen, oxyanion, and double salts and match them with the proposed theories on the flotation of soluble salts to identify the agreed and disagreed cases. The experimental results show that the flotation of these salts varies from collectors (surfactants applied to control the crystal hydrophobicity) to collectors and is strongly affected by the brine ion composition and pH conditions. We find some exceptional flotation results that cannot be simply explained by the crystal surface charge and wettability. Furthermore, we outline several disputes and discrepancies between the experiments and the theories when different collectors are applied. Apart from the extensive consideration of surface hydration, the presence of external ion species exhibits ubiquitous effects on the surface properties of salt crystals and the colloidal properties of collectors. We conclude that the interactions between salt ions, water molecules, collectors, and salt crystals must be considered more thoroughly, and the activity of collectors at the air-liquid interface should also be the focus. Advanced techniques such as molecular dynamics simulation, atomic force microscopy, X-ray photoelectron spectroscopy, and sum-frequency generation spectroscopy are expected to be promising research tools for future studies.
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Affiliation(s)
- Kangkang Sun
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Cuong V Nguyen
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Ngoc N Nguyen
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Anh V Nguyen
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
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9
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Sahle CJ, de Clermont Gallerande E, Niskanen J, Longo A, Elbers M, Schroer MA, Sternemann C, Jahn S. Hydration in aqueous NaCl. Phys Chem Chem Phys 2022; 24:16075-16084. [PMID: 35735165 DOI: 10.1039/d2cp00162d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomistic details about the hydration of ions in aqueous solutions are still debated due to the disordered and statistical nature of the hydration process. However, many processes from biology, physical chemistry to materials sciences rely on the complex interplay between solute and solvent. Oxygen K-edge X-ray excitation spectra provide a sensitive probe of the local atomic and electronic surrounding of the excited sites. We used ab initio molecular dynamics simulations together with extensive spectrum calculations to relate the features found in experimental oxygen K-edge spectra of a concentration series of aqueous NaCl with the induced structural changes upon solvation of the salt and distill the spectral fingerprints of the first hydration shells around the Na+- and Cl--ions. By this combined experimental and theoretical approach, we find the strongest spectral changes to indeed result from the first hydration shells of both ions and relate the observed shift of spectral weight from the post- to the main-edge to the origin of the post-edge as a shape resonance.
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Affiliation(s)
- Christoph J Sahle
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, CS40220, FR-38043 Grenoble Cedex 9, France.
| | | | - Johannes Niskanen
- Department of Physics and Astronomy, University of Turku, FI-20014 Turun Yliopisto, Finland
| | - Alessandro Longo
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, CS40220, FR-38043 Grenoble Cedex 9, France.
| | - Mirko Elbers
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - Martin A Schroer
- Nanoparticle Process Technology, University of Duisburg-Essen, D-47057 Duisburg, Germany
| | - Christian Sternemann
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - Sandro Jahn
- Institute of Geology and Mineralogy, University of Cologne, D-50674 Köln, Germany
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10
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Gregory KP, Elliott GR, Robertson H, Kumar A, Wanless EJ, Webber GB, Craig VSJ, Andersson GG, Page AJ. Understanding specific ion effects and the Hofmeister series. Phys Chem Chem Phys 2022; 24:12682-12718. [PMID: 35543205 DOI: 10.1039/d2cp00847e] [Citation(s) in RCA: 87] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Specific ion effects (SIE), encompassing the Hofmeister Series, have been known for more than 130 years since Hofmeister and Lewith's foundational work. SIEs are ubiquitous and are observed across the medical, biological, chemical and industrial sciences. Nevertheless, no general predictive theory has yet been able to explain ion specificity across these fields; it remains impossible to predict when, how, and to what magnitude, a SIE will be observed. In part, this is due to the complexity of real systems in which ions, counterions, solvents and cosolutes all play varying roles, which give rise to anomalies and reversals in anticipated SIEs. Herein we review the historical explanations for SIE in water and the key ion properties that have been attributed to them. Systems where the Hofmeister series is perturbed or reversed are explored, as is the behaviour of ions at the liquid-vapour interface. We discuss SIEs in mixed electrolytes, nonaqueous solvents, and in highly concentrated electrolyte solutions - exciting frontiers in this field with particular relevance to biological and electrochemical applications. We conclude the perspective by summarising the challenges and opportunities facing this SIE research that highlight potential pathways towards a general predictive theory of SIE.
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Affiliation(s)
- Kasimir P Gregory
- Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia. .,Department of Materials Physics, Research School of Physics, Australian National University, Canberra, ACT 0200, Australia
| | - Gareth R Elliott
- Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia.
| | - Hayden Robertson
- Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia.
| | - Anand Kumar
- Flinders Institute of Nanoscale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5001, Australia
| | - Erica J Wanless
- Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia.
| | - Grant B Webber
- School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Vincent S J Craig
- Department of Materials Physics, Research School of Physics, Australian National University, Canberra, ACT 0200, Australia
| | - Gunther G Andersson
- Flinders Institute of Nanoscale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5001, Australia
| | - Alister J Page
- Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia.
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11
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Talukdar M, Nanda BB, Dehury SK. Quantitative and Qualitative Analysis of Volumetric Properties of Multicharged Electrolytes Potassium Dichromate and Potassium Pyrophosphate in Aqueous D-Fructose Media at Different Temperatures. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422020170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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A Benchmark Protocol for DFT Approaches and Data-Driven Models for Halide-Water Clusters. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27051654. [PMID: 35268757 PMCID: PMC8924895 DOI: 10.3390/molecules27051654] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/18/2022] [Accepted: 02/26/2022] [Indexed: 11/17/2022]
Abstract
Dissolved ions in aqueous media are ubiquitous in many physicochemical processes, with a direct impact on research fields, such as chemistry, climate, biology, and industry. Ions play a crucial role in the structure of the surrounding network of water molecules as they can either weaken or strengthen it. Gaining a thorough understanding of the underlying forces from small clusters to bulk solutions is still challenging, which motivates further investigations. Through a systematic analysis of the interaction energies obtained from high-level electronic structure methodologies, we assessed various dispersion-corrected density functional approaches, as well as ab initio-based data-driven potential models for halide ion-water clusters. We introduced an active learning scheme to automate the generation of optimally weighted datasets, required for the development of efficient bottom-up anion-water models. Using an evolutionary programming procedure, we determined optimized and reference configurations for such polarizable and first-principles-based representation of the potentials, and we analyzed their structural characteristics and energetics in comparison with estimates from DF-MP2 and DFT+D quantum chemistry computations. Moreover, we presented new benchmark datasets, considering both equilibrium and non-equilibrium configurations of higher-order species with an increasing number of water molecules up to 54 for each F, Cl, Br, and I anions, and we proposed a validation protocol to cross-check methods and approaches. In this way, we aim to improve the predictive ability of future molecular computer simulations for determining the ongoing conflicting distribution of different ions in aqueous environments, as well as the transition from nanoscale clusters to macroscopic condensed phases.
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13
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Alkali metal chlorides in DMSO–methanol binary mixtures: insights into the structural properties through molecular dynamics simulations. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02856-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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Credidio B, Pugini M, Malerz S, Trinter F, Hergenhahn U, Wilkinson I, Thürmer S, Winter B. Quantitative electronic structure and work-function changes of liquid water induced by solute. Phys Chem Chem Phys 2021; 24:1310-1325. [PMID: 34604895 PMCID: PMC8768487 DOI: 10.1039/d1cp03165a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent advancement in quantitative liquid-jet photoelectron spectroscopy enables the accurate determination of the absolute-scale electronic energetics of liquids and species in solution. The major objective of the present work is the determination of the absolute lowest-ionization energy of liquid water, corresponding to the 1b1 orbital electron liberation, which is found to vary upon solute addition, and depends on the solute concentration. We discuss two prototypical aqueous salt solutions, NaI(aq) and tetrabutylammonium iodide, TBAI(aq), with the latter being a strong surfactant. Our results reveal considerably different behavior of the liquid water 1b1 binding energy in each case. In the NaI(aq) solutions, the 1b1 energy increases by about 0.3 eV upon increasing the salt concentration from very dilute to near-saturation concentrations, whereas for TBAI the energy decreases by about 0.7 eV upon formation of a TBAI surface layer. The photoelectron spectra also allow us to quantify the solute-induced effects on the solute binding energies, as inferred from concentration-dependent energy shifts of the I− 5p binding energy. For NaI(aq), an almost identical I− 5p shift is found as for the water 1b1 binding energy, with a larger shift occurring in the opposite direction for the TBAI(aq) solution. We show that the evolution of the water 1b1 energy in the NaI(aq) solutions can be primarily assigned to a change of water's electronic structure in the solution bulk. In contrast, apparent changes of the 1b1 energy for TBAI(aq) solutions can be related to changes of the solution work function which could arise from surface molecular dipoles. Furthermore, for both of the solutions studied here, the measured water 1b1 binding energies can be correlated with the extensive solution molecular structure changes occurring at high salt concentrations, where in the case of NaI(aq), too few water molecules exist to hydrate individual ions and the solution adopts a crystalline-like phase. We also comment on the concentration-dependent shape of the second, 3a1 orbital liquid water ionization feature which is a sensitive signature of water–water hydrogen bond interactions. Significant differences are observed in liquid-water's lowest electron binding energy with increasing solute concentration in archetypal aqueous solutions. For NaI(aq) and TBAI(aq), the energy changes extend to +0.3 eV and −0.7 eV, respectively.![]()
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Affiliation(s)
- Bruno Credidio
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany. .,Institute for Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Michele Pugini
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Sebastian Malerz
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Florian Trinter
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany. .,Institut für Kernphysik, Goethe-Universität, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Uwe Hergenhahn
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Iain Wilkinson
- Department of Locally-Sensitive & Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Stephan Thürmer
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan.
| | - Bernd Winter
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
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15
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Caruso A, Paesani F. Data-driven many-body models enable a quantitative description of chloride hydration from clusters to bulk. J Chem Phys 2021; 155:064502. [PMID: 34391363 DOI: 10.1063/5.0059445] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
We present a new data-driven potential energy function (PEF) describing chloride-water interactions, which is developed within the many-body-energy (MB-nrg) theoretical framework. Besides quantitatively reproducing low-order many-body energy contributions, the new MB-nrg PEF is able to correctly predict the interaction energies of small chloride-water clusters calculated at the coupled cluster level of theory. Importantly, classical and quantum molecular dynamics simulations of a single chloride ion in water demonstrate that the new MB-nrg PEF predicts x-ray spectra in close agreement with the experimental results. Comparisons with an popular empirical model and a polarizable PEF emphasize the importance of an accurate representation of short-range many-body effect while demonstrating that pairwise additive representations of chloride-water and water-water interactions are inadequate for correctly representing the hydration structure of chloride in both gas-phase clusters and solution. We believe that the analyses presented in this study provide additional evidence for the accuracy and predictive ability of the MB-nrg PEFs, which can then enable more realistic simulations of ionic aqueous systems in different environments.
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Affiliation(s)
- Alessandro Caruso
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
| | - Francesco Paesani
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
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16
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Elbers M, Schmidt C, Sternemann C, Sahle CJ, Jahn S, Albers C, Sakrowski R, Gretarsson H, Sundermann M, Tolan M, Wilke M. Ion association in hydrothermal aqueous NaCl solutions: implications for the microscopic structure of supercritical water. Phys Chem Chem Phys 2021; 23:14845-14856. [PMID: 34223594 DOI: 10.1039/d1cp01490k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Knowledge of the microscopic structure of fluids and changes thereof with pressure and temperature is important for the understanding of chemistry and geochemical processes. In this work we investigate the influence of sodium chloride on the hydrogen-bond network in aqueous solution up to supercritical conditions. A combination of in situ X-ray Raman scattering and ab initio molecular dynamics simulations is used to probe the oxygen K-edge of the alkali halide aqueous solution in order to obtain unique information about the oxygen's local coordination around the ions, e.g. solvation-shell structure and the influence of ion pairing. The measured spectra exhibit systematic temperature dependent changes, which are entirely reproduced by calculations on the basis of structural snapshots obtained via ab initio molecular dynamics simulations. Analysis of the simulated trajectories allowed us to extract detailed structural information. This combined analysis reveals a net destabilizing effect of the dissolved ions which is reduced with rising temperature. The observed increased formation of contact ion pairs and occurrence of larger polyatomic clusters at higher temperatures can be identified as a driving force behind the increasing structural similarity between the salt solution and pure water at elevated temperatures and pressures with drawback on the role of hydrogen bonding in the hot fluid. We discuss our findings in view of recent results on hot NaOH and HCl aqueous fluids and emphasize the importance of ion pairing in the interpretation of the microscopic structure of water.
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Affiliation(s)
- Mirko Elbers
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44227 Dortmund, Germany.
| | - Christian Schmidt
- Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, D-14473 Potsdam, Germany
| | - Christian Sternemann
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44227 Dortmund, Germany.
| | - Christoph J Sahle
- European Synchrotron Radiation Facility, F-38043 Grenoble Cedex, France
| | - Sandro Jahn
- Institut für Geologie und Mineralogie, Universität zu Köln, D-50674 Cologne, Germany
| | - Christian Albers
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44227 Dortmund, Germany.
| | - Robin Sakrowski
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44227 Dortmund, Germany.
| | - Hlynur Gretarsson
- Deutsches Elektronen-Synchrotron DESY, D-22607, Hamburg, Germany and Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany
| | - Martin Sundermann
- Deutsches Elektronen-Synchrotron DESY, D-22607, Hamburg, Germany and Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany
| | - Metin Tolan
- Fakultät Physik/DELTA, Technische Universität Dortmund, D-44227 Dortmund, Germany.
| | - Max Wilke
- Institut für Geowissenschaften, Universität Potsdam, D-14476 Potsdam, Germany
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17
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Wills A, Fernández-Serra M. Role of water model on ion dissociation at ambient conditions. J Chem Phys 2021; 154:194502. [PMID: 34240899 DOI: 10.1063/5.0046188] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study ion pair dissociation in water at ambient conditions using a combination of classical and ab initio approaches. The goal of this study is to disentangle the sources of discrepancy observed in computed potentials of mean force. In particular, we aim to understand why some models favor the stability of solvent-separated ion pairs vs contact ion pairs. We found that some observed differences can be explained by non-converged simulation parameters. However, we also unveil that for some models, small changes in the solution density can have significant effects on modifying the equilibrium balance between the two configurations. We conclude that the thermodynamic stability of contact and solvent-separated ion pairs is very sensitive to the dielectric properties of the underlying simulation model. In general, classical models are very robust in providing a similar estimation of the contact ion pair stability, while this is much more variable in density functional theory-based models. The barrier to transition from the solvent-separated to contact ion pair is fundamentally dependent on the balance between electrostatic potential energy and entropy. This reflects the importance of water intra- and inter-molecular polarizability in obtaining an accurate description of the screened ion-ion interactions.
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Affiliation(s)
- Alec Wills
- Physics and Astronomy Department, Stony Brook University. Stony Brook, New York 11794-3800, USA
| | - Marivi Fernández-Serra
- Physics and Astronomy Department, Stony Brook University. Stony Brook, New York 11794-3800, USA
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18
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Bussy A, Hutter J. Efficient and low-scaling linear-response time-dependent density functional theory implementation for core-level spectroscopy of large and periodic systems. Phys Chem Chem Phys 2021; 23:4736-4746. [PMID: 33598668 DOI: 10.1039/d0cp06164f] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss our implementation of linear-response time-dependent density functional theory (LR-TDDFT) for core level near-edge absorption spectroscopy. The method is based on established LR-TDDFT approaches to X-ray absorption spectroscopy (XAS) with additional accurate approximations for increased efficiency. We validate our implementation by reproducing benchmark results at the K-edge and showing that spin-orbit coupling effects at the L2,3-edge are well described. We also demonstrate that the method is suitable for extended systems in periodic boundary conditions and measure a favorable sub-cubic scaling of the calculation cost with system size. We finally show that GPUs can be efficiently exploited and report speedups of up to a factor 2.
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Affiliation(s)
- Augustin Bussy
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
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19
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Ohsawa S, Tokushima T, Okada K. Hydration of the Zwitterionic and Protonated Forms of Glycine Betaine Probed by Soft X-ray Emission Spectroscopy Coupled with Chemometrics. J Phys Chem B 2021; 125:1881-1887. [PMID: 33570403 DOI: 10.1021/acs.jpcb.0c10712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Soft X-ray absorption and emission spectra of glycine betaine (GB) have been measured at the O K-edge in neutral and strongly acidic solutions. The absorption spectra of the neutral solutions have a resonance peak at 532.6 eV, assigned to the transition to the π* orbital, whereas in the acidic solutions, the peak is shifted by -0.3 eV. The emission spectra taken as a function of the GB concentration have been analyzed by means of a modified classical least-squares regression method to obtain the hydration number of the solute. The analysis is successful when the emission spectra have been acquired at the energy of a slightly detuned resonance, giving 28 and 24 as the minimum values for the zwitterionic and protonated GB, respectively. The number of 28 accords with the reported values for the number of water molecules in the first hydration layer of the zwitterion and is greater than that obtained by other experimental techniques. The obtained numbers are used to discuss the hydration structure of GB with the aid of ab initio molecular orbital calculations. The hydration structure of the protonated form of GB is explored for the first time.
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Affiliation(s)
- Shohei Ohsawa
- Department of Chemistry, Graduate School of Science, Hiroshima University, Hiroshima, Higashi-Hiroshima 739-8526, Japan.,RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | | | - Kazumasa Okada
- Department of Chemistry, Graduate School of Science, Hiroshima University, Hiroshima, Higashi-Hiroshima 739-8526, Japan.,RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
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20
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Yamaguchi T, Fukuyama N, Yoshida K, Katayama Y. Ion Solvation and Water Structure in an Aqueous Sodium Chloride Solution in the Gigapascal Pressure Range. J Phys Chem Lett 2021; 12:250-256. [PMID: 33332130 DOI: 10.1021/acs.jpclett.0c03147] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The structure of a 3 m (= mol/kg) NaCl aqueous solution at 1.3 and 1.7 GPa and 300 K, as well as at an ambient condition, is determined by synchrotron X-ray diffraction measurements combined with an empirical potential structure refinement (EPSR) modeling. When the solution is pressurized to the gigapascal pressure range, the ice-like hydrogen-bonded water network at 300 K/0.1 MPa is drastically perturbed to give rise to a simple, liquid-like water molecules arrangement retaining the hydrogen bonds. The coordination number of the chloride ion increases from around 6 at 0.1 MPa to about 16 at 1.7 GPa, accompanied by the extended solvation shells' evolution. On the other hand, the sodium ion's solvation structure does not change significantly with pressure and consists of 6-fold water molecules' coordination. We discuss a structure makers/breakers' concept for the ion solvation concerning the water structure in the gigapascal pressure range.
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Affiliation(s)
- Toshio Yamaguchi
- Department of Chemistry, Faculty of Science, Fukuoka University, Jonan, Fukuoka 814-0180, Japan
| | - Nami Fukuyama
- Department of Chemistry, Faculty of Science, Fukuoka University, Jonan, Fukuoka 814-0180, Japan
| | - Koji Yoshida
- Department of Chemistry, Faculty of Science, Fukuoka University, Jonan, Fukuoka 814-0180, Japan
| | - Yoshinori Katayama
- Synchrotron Radiation Research Center, National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo 679-5148, Japan
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21
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Abid AR, Reinhardt M, Boudjemia N, Pelimanni E, Milosavljević AR, Saak CM, Huttula M, Björneholm O, Patanen M. The effect of relative humidity on CaCl 2 nanoparticles studied by soft X-ray absorption spectroscopy. RSC Adv 2021; 11:2103-2111. [PMID: 35424180 PMCID: PMC8693708 DOI: 10.1039/d0ra08943e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/26/2020] [Indexed: 01/09/2023] Open
Abstract
Ca- and Cl-containing nanoparticles are common in atmosphere, originating for example from desert dust and sea water. The properties and effects on atmospheric processes of these aerosol particles depend on the relative humidity (RH) as they are often both hygroscopic and deliquescent. We present here a study of surface structure of free-flying CaCl2 nanoparticles (CaCl2-NPs) in the 100 nm size regime prepared at different humidity levels (RH: 11-85%). We also created mixed nanoparticles by aerosolizing a solution of CaCl2 and phenylalanine (Phe), which is a hydrophobic amino acid present in atmosphere. Information of hydration state of CaCl2-NPs and production of mixed CaCl2 + Phe nanoparticles was obtained using soft X-ray absorption spectroscopy (XAS) at Ca 2p, Cl 2p, C 1s, and O 1s edges. We also report Ca 2p and Cl 2p X-ray absorption spectra of an aqueous CaCl2 solution. The O 1s X-ray absorption spectra measured from hydrated CaCl2-NPs resemble liquid-like water spectrum, which is heavily influenced by the presence of ions. Core level spectra of Ca2+ and Cl- ions do not show a clear dependence of % RH, indicating that the first coordination shell remains similar in all measured hydrated CaCl2-NPs, but they differ from aqueous solution and solid CaCl2.
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Affiliation(s)
- Abdul Rahman Abid
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
- Molecular and Condensed Matter Physics, Uppsala University Ångströmlaboratoriet 752 37 Uppsala Sweden
| | - Maximilian Reinhardt
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
| | - Nacer Boudjemia
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
| | - Eetu Pelimanni
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
| | | | - Clara-Magdalena Saak
- Molecular and Condensed Matter Physics, Uppsala University Ångströmlaboratoriet 752 37 Uppsala Sweden
| | - Marko Huttula
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
| | - Olle Björneholm
- Molecular and Condensed Matter Physics, Uppsala University Ångströmlaboratoriet 752 37 Uppsala Sweden
| | - Minna Patanen
- Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu P.O. Box 3000 90570 Oulu Finland +358 46 9691089
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22
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Li LQ, Zhan ZM, Huang BQ, Xue SM, Ji CH, Wang RZ, Tang YJ, Xu ZL. RO membrane fabricated via a facile modified heat-treating strategy for high-flux desalination. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118498] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Liu YY, Hua X, Zhang Z, Zhang J, Zhang S, Hu P, Long YT. pH-Dependent Water Clusters in Photoacid Solution: Real-Time Observation by ToF-SIMS at a Submicropore Confined Liquid-Vacuum Interface. Front Chem 2020; 8:731. [PMID: 32974284 PMCID: PMC7472850 DOI: 10.3389/fchem.2020.00731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/15/2020] [Indexed: 11/13/2022] Open
Abstract
Water clusters are ubiquitously formed in aqueous solutions by hydrogen bonding, which is quite sensitive to various environment factors such as temperature, pressure, electrolytes, and pH. Investigation of how the environment has impact on water structure is important for further understanding of the nature of water and the interactions between water and solutes. In this work, pH-dependent water structure changes were studied by monitoring the changes for the size distribution of protonated water clusters by in-situ liquid ToF-SIMS. In combination with a light illumination system, in-situ liquid ToF-SIMS was used to real-time measure the changes of a light-activated organic photoacid under different light illumination conditions. Thus, the proton transfer and pH-mediated water cluster changes were analyzed in real-time. It was found that higher concentration of free protons could lead to a strengthened local hydrogen bonding network as well as relatively larger protonated water clusters in both organic acid and inorganic acid. Besides, the accumulation of protons at the liquid-vacuum interface under light illumination was observed owing to the affinity of organic molecules to the low-pressure gas phase. The application of in-situ liquid ToF-SIMS analysis in combination with in-situ light illumination system opened up an avenue to real-time investigate light-activated reactions. Besides, the results regarding water structure changes in acidic solutions showed important insights in related atmospheric and physiochemical processes.
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Affiliation(s)
- Ying-Ya Liu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Xin Hua
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhiwei Zhang
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Junji Zhang
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Shaoze Zhang
- National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, China.,Engineering Laboratory for Advanced Battery and Materials of Yunnan Province, Kunming University of Science and Technology, Kunming, China
| | - Ping Hu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Yi-Tao Long
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
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24
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25
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Tsironi I, Schlesinger D, Späh A, Eriksson L, Segad M, Perakis F. Brine rejection and hydrate formation upon freezing of NaCl aqueous solutions. Phys Chem Chem Phys 2020; 22:7625-7632. [DOI: 10.1039/c9cp05436g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studying the freezing of saltwater on a molecular level is of fundamental importance for improving freeze desalination techniques.
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Affiliation(s)
- Ifigeneia Tsironi
- Department of Physics
- AlbaNova University Center
- Stockholm University
- 114 19 Stockholm
- Sweden
| | - Daniel Schlesinger
- Department of Environmental Science & Bolin Centre for Climate Research
- Stockholm University
- 114 18 Stockholm
- Sweden
| | - Alexander Späh
- Department of Physics
- AlbaNova University Center
- Stockholm University
- 114 19 Stockholm
- Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry
- Stockholm University
- 106 91 Stockholm
- Sweden
| | - Mo Segad
- Department of Materials and Environmental Chemistry
- Stockholm University
- 106 91 Stockholm
- Sweden
| | - Fivos Perakis
- Department of Physics
- AlbaNova University Center
- Stockholm University
- 114 19 Stockholm
- Sweden
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26
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Dedic J, Okur HI, Roke S. Polyelectrolytes induce water-water correlations that result in dramatic viscosity changes and nuclear quantum effects. SCIENCE ADVANCES 2019; 5:eaay1443. [PMID: 32064319 PMCID: PMC6989307 DOI: 10.1126/sciadv.aay1443] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/22/2019] [Indexed: 05/28/2023]
Abstract
Ions interact with water via short-ranged ion-dipole interactions. Recently, an additional unexpected long-ranged interaction was found: The total electric field of ions influences water-water correlations over tens of hydration shells, leading to the Jones Ray effect, a 0.3% surface tension depression. Here, we report such long-range interactions contributing substantially to both molecular and macroscopic properties. Femtosecond elastic second harmonic scattering (fs-ESHS) shows that long-range electrostatic interactions are remarkably strong in aqueous polyelectrolyte solutions, leading to an increase in water-water correlations. This increase plays a role in the reduced viscosity, which changes more than two orders of magnitude with polyelectrolyte concentration. Using D2O instead of H2O shifts both the fs-ESHS and the viscosity curve by a factor of ~10 and reduces the maximum viscosity value by 20 to 300%, depending on the polyelectrolyte. These phenomena cannot be explained using a mean-field approximation of the solvent and point to nuclear quantum effects.
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27
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Shinohara Y, Matsumoto R, Thompson MW, Ryu CW, Dmowski W, Iwashita T, Ishikawa D, Baron AQR, Cummings PT, Egami T. Identifying Water-Anion Correlated Motion in Aqueous Solutions through Van Hove Functions. J Phys Chem Lett 2019; 10:7119-7125. [PMID: 31693369 DOI: 10.1021/acs.jpclett.9b02891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electrolyte solutions are ubiquitous in materials in daily use and in biological systems. However, the understanding of their molecular and ionic dynamics, particularly those of their correlated motions, are elusive despite extensive experimental, theoretical, and numerical studies. Here we report the real-space observations of the molecular/ionic-correlated dynamics of aqueous salt (NaCl, NaBr, and NaI) solutions using the Van Hove functions obtained by high-resolution inelastic X-ray scattering measurement and molecular dynamics simulation. Our results directly depict the distance-dependent dynamics of aqueous salt solutions on the picosecond time scale and identify the changes in the anion-water correlations. This study demonstrates the capability of the real-space Van Hove function analysis to describe the local correlated dynamics in aqueous salt solutions.
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Affiliation(s)
- Yuya Shinohara
- Materials Science and Technology Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Ray Matsumoto
- Department of Chemical and Biomolecular Engineering , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Matthew W Thompson
- Department of Chemical and Biomolecular Engineering , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Chae Woo Ryu
- Department of Materials Science and Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Wojciech Dmowski
- Department of Materials Science and Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Takuya Iwashita
- Department of Integrated Science and Technology , Oita University, Dannoharu , Oita 870-1192 , Japan
| | - Daisuke Ishikawa
- JASRI/SPring-8 , Sayo , Hyogo 679-5198 , Japan
- Materials Dynamics Laboratory , RIKEN SPring-8 Center, RIKEN , Sayo , Hyogo 679-5148 , Japan
| | - Alfred Q R Baron
- Materials Dynamics Laboratory , RIKEN SPring-8 Center, RIKEN , Sayo , Hyogo 679-5148 , Japan
| | - Peter T Cummings
- Department of Chemical and Biomolecular Engineering , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Takeshi Egami
- Materials Science and Technology Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
- Department of Materials Science and Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States
- Department of Physics and Astronomy , University of Tennessee, Knoxville , Knoxville , Tennessee 37996 , United States
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28
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29
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Liu YY, Zhang SZ, Ying YL, Xia HL, Hua X, Long YT. Ion-Specific Effects on Hydrogen Bond Network at a Submicropore Confined Liquid-Vacuum Interface: An in Situ Liquid ToF-SIMS Study. J Phys Chem Lett 2019; 10:4935-4941. [PMID: 31403310 DOI: 10.1021/acs.jpclett.9b02047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The hydrogen bond (HB), one of the essential properties of water, tends to link water molecules to form dynamic water clusters. Extrinsic ions could change the size distribution of water clusters by influencing HBs. But the mechanism, especially the influence range of ions on HBs, is still in dispute due to limitation of analytical methods. Herein, we use in situ liquid ToF-SIMS analysis combined with density functional theory calculation to study the influence of different halide anions on HBs at a submicropore confined liquid-vacuum interface. Our experimental results demonstrated that anions show synchronous local and long-range effects on HBs. Specifically, the larger the anion is, the greater degree the long-range HB network and the local hydration number of anions are influenced. More importantly, we found that the long-range effect on the HB network is influenced by nuclear quantum effects, whereas the local effect on water molecules in the first hydration shell is not.
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Affiliation(s)
- Ying-Ya Liu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Shao-Ze Zhang
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yi-Lun Ying
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Hai-Lun Xia
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xin Hua
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yi-Tao Long
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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30
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Shedge SV, Zuehlsdorff TJ, Servis MJ, Clark AE, Isborn CM. Effect of Ions on the Optical Absorption Spectra of Aqueously Solvated Chromophores. J Phys Chem A 2019; 123:6175-6184. [DOI: 10.1021/acs.jpca.9b03163] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sapana V. Shedge
- Chemistry and Chemical Biology, University of California Merced, Merced, California 95343, United States
| | - Tim J. Zuehlsdorff
- Chemistry and Chemical Biology, University of California Merced, Merced, California 95343, United States
| | - Michael J. Servis
- Department of Chemistry and the Material Science and Engineering Program, Washington State University, Pullman, Washington 99164, United States
| | - Aurora E. Clark
- Department of Chemistry and the Material Science and Engineering Program, Washington State University, Pullman, Washington 99164, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Christine M. Isborn
- Chemistry and Chemical Biology, University of California Merced, Merced, California 95343, United States
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31
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Chialvo AA. On the Solute-Induced Structure-Making/Breaking Effect: Rigorous Links among Microscopic Behavior, Solvation Properties, and Solution Non-Ideality. J Phys Chem B 2019; 123:2930-2947. [PMID: 30794414 DOI: 10.1021/acs.jpcb.9b00364] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We studied the solute-induced perturbation of the solvent environment around a solute species from a microscopic viewpoint and propose a novel approach to the understanding of the structure-making/breaking process, regardless of the type and nature of the solute-solvent interactions. Based on the Kirkwood-Buff fluctuation formalism, we present a rigorous statistical mechanics description of the evolution of the solvent structure around the solute, analyze its response to small perturbations of the ( TP) state conditions and composition of the system, and make direct connections between a few equivalent micro- and macroscopic manifestations as probes for, and targets of, experimental measurements. We illustrate the analysis with theoretical results from integral equation calculations of model fluids and experimental evidence from available data for a variety of aqueous electrolyte and nonelectrolyte real fluid solutions. Finally, we provide a critical discussion about the inadequacy underlying a widely used de facto criterion for the classification of structure-making/breaking solutes.
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32
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Köhler MH, Bordin JR, Barbosa MC. Ion flocculation in water: From bulk to nanoporous membrane desalination. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.077] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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33
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Pohl MN, Muchová E, Seidel R, Ali H, Sršeň Š, Wilkinson I, Winter B, Slavíček P. Do water's electrons care about electrolytes? Chem Sci 2019; 10:848-865. [PMID: 30774880 PMCID: PMC6346409 DOI: 10.1039/c8sc03381a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/01/2018] [Indexed: 01/01/2023] Open
Abstract
Ions have a profound effect on the geometrical structure of liquid water and an aqueous environment is known to change the electronic structure of ions. Here we combine photoelectron spectroscopy measurements from liquid microjets with molecular dynamical and quantum chemical calculations to address the reverse question, to what extent do ions affect the electronic structure of liquid water? We study aqueous solutions of sodium iodide (NaI) over a wide concentration range, from nearly pure water to 8 M solutions, recording spectra in the 5 to 60 eV binding energy range to include all water valence and the solute Na+ 2p, I- 4d, and I- 5p orbital ionization peaks. We observe that the electron binding energies of the solute ions change only slightly as a function of electrolyte concentration, less than 150 ± 60 meV over an ∼8 M range. Furthermore, the photoelectron spectrum of liquid water is surprisingly mildly affected as we transform the sample from a dilute aqueous salt solution to a viscous, crystalline-like phase. The most noticeable spectral changes are a negative binding energy shift of the water 1b2 ionizing transition (up to -370 ± 60 meV) and a narrowing of the flat-top shape water 3a1 ionization feature (up to 450 ± 90 meV). A novel computationally efficient technique is introduced to calculate liquid-state photoemission spectra using small clusters from molecular dynamics (MD) simulations embedded in dielectric continuum. This theoretical treatment captured the characteristic positions and structures of the aqueous photoemission peaks, reproducing the experimentally observed narrowing of the water 3a1 feature and weak sensitivity of the water binding energies to electrolyte concentration. The calculations allowed us to attribute the small binding energy shifts to ion-induced disruptions of intermolecular electronic interactions. Furthermore, they demonstrate the importance of considering concentration-dependent screening lengths for a correct description of the electronic structure of solvated systems. Accounting for electronic screening, the calculations highlight the minimal effect of electrolyte concentration on the 1b1 binding energy reference, in accord with the experiments. This leads us to a key finding that the isolated, lowest-binding-energy, 1b1, photoemission feature of liquid water is a robust energetic reference for aqueous liquid microjet photoemission studies.
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Affiliation(s)
- Marvin N Pohl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , D-14195 Berlin , Germany
| | - Eva Muchová
- Department of Physical Chemistry , University of Chemistry and Technology , Technická 5 , 16628 Prague , Czech Republic .
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie , Hahn-Meitner-Platz 1 , D-14109 Berlin , Germany .
- Humboldt-Universität zu Berlin , Department of Chemistry , Brook-Taylor-Str. 2 , D-12489 Berlin , Germany
| | - Hebatallah Ali
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , D-14195 Berlin , Germany
| | - Štěpán Sršeň
- Department of Physical Chemistry , University of Chemistry and Technology , Technická 5 , 16628 Prague , Czech Republic .
| | - Iain Wilkinson
- Helmholtz-Zentrum Berlin für Materialien und Energie , Hahn-Meitner-Platz 1 , D-14109 Berlin , Germany .
| | - Bernd Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
| | - Petr Slavíček
- Department of Physical Chemistry , University of Chemistry and Technology , Technická 5 , 16628 Prague , Czech Republic .
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34
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Oh MI, Gupta M, Oh CI, Weaver DF. Understanding the effect of nanoconfinement on the structure of water hydrogen bond networks. Phys Chem Chem Phys 2019; 21:26237-26250. [DOI: 10.1039/c9cp05014k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dynamic hydrogen bond trails in water confined between two phospholipid membranes traced by the information flow model.
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Affiliation(s)
- Myong In Oh
- Krembil Research Institute
- University Health Network
- Toronto
- Canada
| | - Mayuri Gupta
- Krembil Research Institute
- University Health Network
- Toronto
- Canada
| | - Chang In Oh
- Department of Mathematics
- University of Western Ontario
- London
- Canada
| | - Donald F. Weaver
- Departments of Medicine, Chemistry, and Pharmaceutical Sciences
- University of Toronto
- Toronto
- Canada
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35
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Pettersson LGM. A Two-State Picture of Water and the Funnel of Life. SPRINGER PROCEEDINGS IN PHYSICS 2019. [DOI: 10.1007/978-3-030-21755-6_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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36
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Peng H, Nguyen AV. A link between viscosity and cation-anion contact pairs: Adventure on the concept of structure-making/breaking for concentrated salt solutions. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.145] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Camisasca G, De Marzio M, Rovere M, Gallo P. High density liquid structure enhancement in glass forming aqueous solution of LiCl. J Chem Phys 2018; 148:222829. [DOI: 10.1063/1.5024375] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- G. Camisasca
- Dipartimento di Matematica e Fisica, Università “Roma Tre,” Via della Vasca Navale 84, 00146 Roma, Italy
| | - M. De Marzio
- Dipartimento di Matematica e Fisica, Università “Roma Tre,” Via della Vasca Navale 84, 00146 Roma, Italy
| | - M. Rovere
- Dipartimento di Matematica e Fisica, Università “Roma Tre,” Via della Vasca Navale 84, 00146 Roma, Italy
| | - P. Gallo
- Dipartimento di Matematica e Fisica, Università “Roma Tre,” Via della Vasca Navale 84, 00146 Roma, Italy
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38
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Chen Y, Dupertuis N, Okur HI, Roke S. Temperature dependence of water-water and ion-water correlations in bulk water and electrolyte solutions probed by femtosecond elastic second harmonic scattering. J Chem Phys 2018; 148:222835. [PMID: 29907025 DOI: 10.1063/1.5023343] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yixing Chen
- Laboratory for Fundamental BioPhotonics (LBP), Institute of Bioengineering (IBI), Institute of Materials Science (IMX), School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland
| | - Nathan Dupertuis
- Laboratory for Fundamental BioPhotonics (LBP), Institute of Bioengineering (IBI), Institute of Materials Science (IMX), School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland
| | - Halil I. Okur
- Laboratory for Fundamental BioPhotonics (LBP), Institute of Bioengineering (IBI), Institute of Materials Science (IMX), School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland
| | - Sylvie Roke
- Laboratory for Fundamental BioPhotonics (LBP), Institute of Bioengineering (IBI), Institute of Materials Science (IMX), School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland
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39
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Nagasaka M, Yuzawa H, Kosugi N. Interaction between Water and Alkali Metal Ions and Its Temperature Dependence Revealed by Oxygen K-Edge X-ray Absorption Spectroscopy. J Phys Chem B 2017; 121:10957-10964. [PMID: 29131955 DOI: 10.1021/acs.jpcb.7b09789] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interaction between water molecules and alkali metal ions in aqueous salt solutions has been studied by the oxygen K-edge soft X-ray absorption spectroscopy (XAS) in transmission mode. In the measurement of several alkali halide aqueous solutions with different alkali chlorides (Li, Na, and K) and different sodium halides (Cl, Br, and I), the pre-edge component arising from the hydration water molecules shows a blue shift in peak energy as strongly depending on cations but not on anions. In the temperature dependent measurement, the pre-edge component arising from water molecules beyond the first hydration shell shows the same behavior as that of pure liquid water. On the other hand, the pre-edge component arising from water molecules in the first hydration shell of Li+ ions is not evidently dependent on the temperature, indicating that the hydration water molecules are more strongly bound with Li+ ions than the other water molecules. These experimental results are supported by the results of radial distribution functions of the first hydration shell and their temperature dependence, evaluated by molecular dynamics simulations.
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Affiliation(s)
- Masanari Nagasaka
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan.,SOKENDAI (Graduate University for Advanced Studies) , Myodaiji, Okazaki 444-8585, Japan
| | - Hayato Yuzawa
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan
| | - Nobuhiro Kosugi
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan.,SOKENDAI (Graduate University for Advanced Studies) , Myodaiji, Okazaki 444-8585, Japan
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40
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Smith JW, Saykally RJ. Soft X-ray Absorption Spectroscopy of Liquids and Solutions. Chem Rev 2017; 117:13909-13934. [DOI: 10.1021/acs.chemrev.7b00213] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jacob W. Smith
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
| | - Richard J. Saykally
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
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41
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Yin Z, Inhester L, Thekku Veedu S, Quevedo W, Pietzsch A, Wernet P, Groenhof G, Föhlisch A, Grubmüller H, Techert S. Cationic and Anionic Impact on the Electronic Structure of Liquid Water. J Phys Chem Lett 2017; 8:3759-3764. [PMID: 28742347 DOI: 10.1021/acs.jpclett.7b01392] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hydration shells around ions are crucial for many fundamental biological and chemical processes. Their local physicochemical properties are quite different from those of bulk water and hard to probe experimentally. We address this problem by combining soft X-ray spectroscopy using a liquid jet and molecular dynamics (MD) simulations together with ab initio electronic structure calculations to elucidate the water-ion interaction in a MgCl2 solution at the molecular level. Our results reveal that salt ions mainly affect the electronic properties of water molecules in close vicinity and that the oxygen K-edge X-ray emission spectrum of water molecules in the first solvation shell differs significantly from that of bulk water. Ion-specific effects are identified by fingerprint features in the water X-ray emission spectra. While Mg2+ ions cause a bathochromic shift of the water lone pair orbital, the 3p orbital of the Cl- ions causes an additional peak in the water emission spectrum at around 528 eV.
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Affiliation(s)
- Zhong Yin
- Deutsches Elektronen-Synchrotron DESY , Notkestrasse 85, 22607 Hamburg, Germany
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Ludger Inhester
- Deutsches Elektronen-Synchrotron DESY , Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science , Notkestrasse 85, 22607 Hamburg, Germany
| | - Sreevidya Thekku Veedu
- Deutsches Elektronen-Synchrotron DESY , Notkestrasse 85, 22607 Hamburg, Germany
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Wilson Quevedo
- Helmholtz-Zentrum Berlin GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Annette Pietzsch
- Helmholtz-Zentrum Berlin GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Philippe Wernet
- Helmholtz-Zentrum Berlin GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Gerrit Groenhof
- University of Jyväskylä , P.O. Box 35, 40014 Jyväskylä, Finland
| | - Alexander Föhlisch
- Helmholtz-Zentrum Berlin GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- University of Potsdam , Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Helmut Grubmüller
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Simone Techert
- Deutsches Elektronen-Synchrotron DESY , Notkestrasse 85, 22607 Hamburg, Germany
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
- University of Göttingen , Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
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42
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Schienbein P, Schwaab G, Forbert H, Havenith M, Marx D. Correlations in the Solute-Solvent Dynamics Reach Beyond the First Hydration Shell of Ions. J Phys Chem Lett 2017; 8:2373-2380. [PMID: 28488865 DOI: 10.1021/acs.jpclett.7b00713] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
While the real-space structure of solvation shells has been explored for decades, a dynamical perspective that directly relies on changes in the H-bond network became accessible more recently mainly via far-infrared (THz) spectroscopies. A remaining key question is how many hydration shells are affected by ion-induced network perturbations. We disclose that theoretical THz difference spectra of aqueous salt solutions can be deciphered in terms of only a handful of dipolar auto- and cross-correlations, including the second solvation shell. This emphasizes the importance of cross-correlations being often neglected in multicomponent models. Analogously, experimental THz responses of simple ions can be deciphered in a similar way. Dramatic intensity cancellations due to large positive and negative contributions are found to effectively shift intensity maxima. Thus, THz spectroscopy provides an unprecedented view on the details of hydration dynamics, which can be understood by a combination of experiment and theory.
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Affiliation(s)
- Philipp Schienbein
- Lehrstuhl für Theoretische Chemie, ‡Lehrstuhl für Physikalische Chemie II, and §Center for Solvation Science ZEMOS, Ruhr-Universität Bochum , 44780 Bochum, Germany
| | - Gerhard Schwaab
- Lehrstuhl für Theoretische Chemie, ‡Lehrstuhl für Physikalische Chemie II, and §Center for Solvation Science ZEMOS, Ruhr-Universität Bochum , 44780 Bochum, Germany
| | - Harald Forbert
- Lehrstuhl für Theoretische Chemie, ‡Lehrstuhl für Physikalische Chemie II, and §Center for Solvation Science ZEMOS, Ruhr-Universität Bochum , 44780 Bochum, Germany
| | - Martina Havenith
- Lehrstuhl für Theoretische Chemie, ‡Lehrstuhl für Physikalische Chemie II, and §Center for Solvation Science ZEMOS, Ruhr-Universität Bochum , 44780 Bochum, Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie, ‡Lehrstuhl für Physikalische Chemie II, and §Center for Solvation Science ZEMOS, Ruhr-Universität Bochum , 44780 Bochum, Germany
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43
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Leontidis E. Investigations of the Hofmeister series and other specific ion effects using lipid model systems. Adv Colloid Interface Sci 2017; 243:8-22. [PMID: 28395857 DOI: 10.1016/j.cis.2017.04.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 04/02/2017] [Indexed: 11/28/2022]
Abstract
From the ion point-of-view specific ion effects (SIE) arise as an interplay of ionic size and shape and charge distribution. However in aqueous systems SIE invariably involve water, and at surfaces they involve both interacting surface groups and local fields emanating from the surface. In this review we highlight the fundamental importance of ionic size and hydration on SIE, properties which encompass all types of interacting forces and ion-pairing phenomena and make the Hofmeister or lyotropic series of ions pertinent to a broad range of systems and phenomena. On the other hand ionic hydrophobicity and complexation capacity also determine ionic behavior in a variety of contexts. Over the years we have carried out carefully designed experiments on a few selected soft matter model systems, most involving zwitterionic phospholipids, to assess the importance of fundamental ionic and interfacial properties on ion specific effects. By tuning down direct Coulomb interactions, working with different interfacial geometries, and carefully tuning ion-lipid headgroup interactions it is possible to assess the importance of different parameters contributing to ion specific behavior. We argue that the majority of specific ion effects involving relatively simple soft matter systems can be at least qualitatively understood and demystified.
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44
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The Structure of Water and Aqueous Systems. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/b978-0-12-805324-9.00003-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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45
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Chen Y, Okur HI, Liang C, Roke S. Orientational ordering of water in extended hydration shells of cations is ion-specific and is correlated directly with viscosity and hydration free energy. Phys Chem Chem Phys 2017; 19:24678-24688. [DOI: 10.1039/c7cp03395h] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Specific ion effects in aqueous solutions are investigated at the molecular, nanoscopic and macroscopic levels.
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Affiliation(s)
- Yixing Chen
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Halil I. Okur
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Chungwen Liang
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Sylvie Roke
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
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46
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Caralampio DZ, Martínez JM, Pappalardo RR, Marcos ES. The hydration structure of the heavy-alkalines Rb+ and Cs+ through molecular dynamics and X-ray absorption spectroscopy: surface clusters and eccentricity. Phys Chem Chem Phys 2017; 19:28993-29004. [DOI: 10.1039/c7cp05346k] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Hydration shells around Rb+ and Cs+ are not symmetric; the cation and the 1st-shell water mass center are separated by ∼0.4 Å, and this is supported by agreement between the theoretical and experimental EXAFS spectrum.
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Affiliation(s)
| | - José M. Martínez
- Departmento de Quimica Fisica
- Universidad de Sevilla
- 41012-Seville
- Spain
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47
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Jeyachandran YL, Meyer F, Benkert A, Bär M, Blum M, Yang W, Reinert F, Heske C, Weinhardt L, Zharnikov M. Investigation of the Ionic Hydration in Aqueous Salt Solutions by Soft X-ray Emission Spectroscopy. J Phys Chem B 2016; 120:7687-95. [PMID: 27442708 DOI: 10.1021/acs.jpcb.6b03952] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding the molecular structure of the hydration shells and their impact on the hydrogen bond (HB) network of water in aqueous salt solutions is a fundamentally important and technically relevant question. In the present work, such hydration effects were studied for a series of representative salt solutions (NaCl, KCl, CaCl2, MgCl2, and KBr) by soft X-ray emission spectroscopy (XES) and resonant inelastic soft X-ray scattering (RIXS). The oxygen K-edge XES spectra could be described with three components, attributed to initial state HB configurations in pure water, water molecules that have undergone an ultrafast dissociation initiated by the X-ray excitation, and water molecules in contact with salt ions. The behavior of the individual components, as well as the spectral shape of the latter component, has been analyzed in detail. In view of the role of ions in such effects as protein denaturation (i.e., the Hofmeister series), we discuss the ion-specific nature of the hydration shells and find that the results point to a predominant role of anions as compared to cations. Furthermore, we observe a concentration-dependent suppression of ultrafast dissociation in all salt solutions, associated with a significant distortion of intact HB configurations of water molecules facilitating such a dissociation.
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Affiliation(s)
- Y L Jeyachandran
- Angewandte Physikalische Chemie, Universität Heidelberg , Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - F Meyer
- Experimentelle Physik VII, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - A Benkert
- Experimentelle Physik VII, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.,Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT) , Hermann-v.-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - M Bär
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany.,Institute für Physik und Chemie, Brandenburgische Technische Universität Cottbus-Senftenberg , Platz der Deutschen Einheit 1, 03046 Cottbus, Germany.,Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV) , 4505 Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
| | - M Blum
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV) , 4505 Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
| | - W Yang
- Advanced Light Source (ALS), Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States
| | - F Reinert
- Experimentelle Physik VII, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - C Heske
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT) , Hermann-v.-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV) , 4505 Maryland Parkway, Las Vegas, Nevada 89154-4003, United States.,Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT) , Engesserstrasse 18/20, 76028 Karlsruhe, Germany
| | - L Weinhardt
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT) , Hermann-v.-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV) , 4505 Maryland Parkway, Las Vegas, Nevada 89154-4003, United States.,Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT) , Engesserstrasse 18/20, 76028 Karlsruhe, Germany
| | - M Zharnikov
- Angewandte Physikalische Chemie, Universität Heidelberg , Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
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48
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Antalek M, Pace E, Hedman B, Hodgson KO, Chillemi G, Benfatto M, Sarangi R, Frank P. Solvation structure of the halides from x-ray absorption spectroscopy. J Chem Phys 2016; 145:044318. [PMID: 27475372 PMCID: PMC4967075 DOI: 10.1063/1.4959589] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/11/2016] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional models for the aqueous solvation structures of chloride, bromide, and iodide are reported. K-edge extended X-ray absorption fine structure (EXAFS) and Minuit X-ray absorption near edge (MXAN) analyses found well-defined single shell solvation spheres for bromide and iodide. However, dissolved chloride proved structurally distinct, with two solvation shells needed to explain its strikingly different X-ray absorption near edge structure (XANES) spectrum. Final solvation models were as follows: iodide, 8 water molecules at 3.60 ± 0.13 Å and bromide, 8 water molecules at 3.40 ± 0.14 Å, while chloride solvation included 7 water molecules at 3.15 ± 0.10 Å, and a second shell of 7 water molecules at 4.14 ± 0.30 Å. Each of the three derived solvation shells is approximately uniformly disposed about the halides, with no global asymmetry. Time-dependent density functional theory calculations simulating the chloride XANES spectra following from alternative solvation spheres revealed surprising sensitivity of the electronic state to 6-, 7-, or 8-coordination, implying a strongly bounded phase space for the correct structure during an MXAN fit. MXAN analysis further showed that the asymmetric solvation predicted from molecular dynamics simulations using halide polarization can play no significant part in bulk solvation. Classical molecular dynamics used to explore chloride solvation found a 7-water solvation shell at 3.12 (-0.04/+0.3) Å, supporting the experimental result. These experiments provide the first fully three-dimensional structures presenting to atomic resolution the aqueous solvation spheres of the larger halide ions.
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Affiliation(s)
- Matthew Antalek
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Elisabetta Pace
- Laboratori Nazionali di Frascati-INFN, P.O. Box 13, 00044 Frascati, Italy
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Giovanni Chillemi
- CINECA, SCAI-SuperComputing Applications and Innovation Department, Via dei Tizii 6, 00185 Roma, Italy
| | - Maurizio Benfatto
- Laboratori Nazionali di Frascati-INFN, P.O. Box 13, 00044 Frascati, Italy
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Patrick Frank
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
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Fransson T, Harada Y, Kosugi N, Besley NA, Winter B, Rehr JJ, Pettersson LGM, Nilsson A. X-ray and Electron Spectroscopy of Water. Chem Rev 2016; 116:7551-69. [PMID: 27244473 DOI: 10.1021/acs.chemrev.5b00672] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Here we present an overview of recent developments of X-ray and electron spectroscopy to probe water at different temperatures. Photon-induced ionization followed by detection of electrons from either the O 1s level or the valence band is the basis of photoelectron spectroscopy. Excitation between the O 1s and the unoccupied states or occupied states is utilized in X-ray absorption and X-ray emission spectroscopies. These techniques probe the electronic structure of the liquid phase and show sensitivity to the local hydrogen-bonding structure. Both experimental aspects related to the measurements and theoretical simulations to assist in the interpretation are discussed in detail. Different model systems are presented such as the different bulk phases of ice and various adsorbed monolayer structures on metal surfaces.
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Affiliation(s)
- Thomas Fransson
- Department of Physics, Chemistry and Biology, Linköping University , S-581 83 Linköping, Sweden
| | - Yoshihisa Harada
- Institute for Solid State Physics (ISSP), The University of Tokyo , Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Nobuhiro Kosugi
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan
| | - Nicholas A Besley
- Department of Physical and Theoretical Chemistry, School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Bernd Winter
- Institute of Methods for Material Development, Helmholtz Center Berlin , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - John J Rehr
- Department of Physics, University of Washington , Seattle, Washington 98195, United States
| | - Lars G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University , S-106 91 Stockholm, Sweden
| | - Anders Nilsson
- Department of Physics, AlbaNova University Center, Stockholm University , S-106 91 Stockholm, Sweden
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50
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Demontis P, Gulín-González J, Masia M, Sant M, Suffritti GB. The interplay between dynamic heterogeneities and structure of bulk liquid water: A molecular dynamics simulation study. J Chem Phys 2016; 142:244507. [PMID: 26133441 DOI: 10.1063/1.4922930] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In order to study the interplay between dynamical heterogeneities and structural properties of bulk liquid water in the temperature range 130-350 K, thus including the supercooled regime, we use the explicit trend of the distribution functions of some molecular properties, namely, the rotational relaxation constants, the atomic mean-square displacements, the relaxation of the cross correlation functions between the linear and squared displacements of H and O atoms of each molecule, the tetrahedral order parameter q and, finally, the number of nearest neighbors (NNs) and of hydrogen bonds (HBs) per molecule. Two different potentials are considered: TIP4P-Ew and a model developed in this laboratory for the study of nanoconfined water. The results are similar for the dynamical properties, but are markedly different for the structural characteristics. In particular, for temperatures higher than that of the dynamic crossover between "fragile" (at higher temperatures) and "strong" (at lower temperatures) liquid behaviors detected around 207 K, the rotational relaxation of supercooled water appears to be remarkably homogeneous. However, the structural parameters (number of NNs and of HBs, as well as q) do not show homogeneous distributions, and these distributions are different for the two water models. Another dynamic crossover between "fragile" (at lower temperatures) and "strong" (at higher temperatures) liquid behaviors, corresponding to the one found experimentally at T(∗) ∼ 315 ± 5 K, was spotted at T(∗) ∼ 283 K and T(∗) ∼ 276 K for the TIP4P-Ew and the model developed in this laboratory, respectively. It was detected from the trend of Arrhenius plots of dynamic quantities and from the onset of a further heterogeneity in the rotational relaxation. To our best knowledge, it is the first time that this dynamical crossover is detected in computer simulations of bulk water. On the basis of the simulation results, the possible mechanisms of the two crossovers at molecular level are discussed.
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Affiliation(s)
- Pierfranco Demontis
- Dipartimento di Chimica e Farmacia, Università degli studi di Sassari, Sassari, Italy
| | - Jorge Gulín-González
- Grupo de Matemática y Física Computacionales, Universidad de las Ciencias Informáticas (UCI), Carretera a San Antonio de los Baños, Km 21/2, La Lisa, La Habana, Cuba
| | - Marco Masia
- Dipartimento di Chimica e Farmacia, Università degli studi di Sassari, Sassari, Italy
| | - Marco Sant
- Dipartimento di Chimica e Farmacia, Università degli studi di Sassari, Sassari, Italy
| | - Giuseppe B Suffritti
- Dipartimento di Chimica e Farmacia, Università degli studi di Sassari, Sassari, Italy
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