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Ta AT, Daouli A, Ullberg RS, Fonseca E, Proust V, Grandjean A, Hennig RG, Zur Loye HC, Badawi M, Phillpot SR. Incorporating solvent effects in DFT: insights from cation exchange in faujasites. Phys Chem Chem Phys 2024; 26:14561-14572. [PMID: 38722083 DOI: 10.1039/d4cp00467a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Zeolites are versatile materials renowned for their extra-framework cation exchange capabilities, with applications spanning diverse fields, including nuclear waste treatment. While detailed experimental characterization offers valuable insight, density functional theory (DFT) proves particularly adept at investigating ion exchange in zeolites, owing to its atomic and electronic resolution. However, the prevalent occurrence of zeolitic ion exchange in aqueous environments poses a challenge to conventional DFT modeling, traditionally conducted in a vacuum. This study seeks to enhance zeolite modeling by systematically evaluating predictive differences across varying degrees of aqueous solvent inclusion. Specifically focusing on monovalent cation exchange in Na-X zeolites, we explore diverse modeling approaches. These range from simple dehydrated systems (representing bare reference states in vacuum) to more sophisticated models that incorporate aqueous solvent effects through explicit water molecules and/or a dielectric medium. Through comparative analysis of DFT and semi-empirical DFT approaches, along with their validation against experimental results, our findings underscore the necessity to concurrently consider explicit and implicit solvent effects for accurate prediction of zeolitic ionic exchange.
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Affiliation(s)
- An T Ta
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Ayoub Daouli
- Laboratoire Lorrain de Chimie Moléculaire L2CM, Université de Lorraine, CNRS, F-54000 Nancy, France.
| | - R Seaton Ullberg
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Eric Fonseca
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Vanessa Proust
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | | | - Richard G Hennig
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Hans-Conrad Zur Loye
- Center for Hierarchical Waste Form Materials and Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Michael Badawi
- Laboratoire Lorrain de Chimie Moléculaire L2CM, Université de Lorraine, CNRS, F-54000 Nancy, France.
| | - Simon R Phillpot
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.
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2
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Rahman MM, Tan S, Yang Y, Zhong H, Ghose S, Waluyo I, Hunt A, Ma L, Yang XQ, Hu E. An inorganic-rich but LiF-free interphase for fast charging and long cycle life lithium metal batteries. Nat Commun 2023; 14:8414. [PMID: 38110406 PMCID: PMC10728193 DOI: 10.1038/s41467-023-44282-z] [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: 07/11/2023] [Accepted: 12/06/2023] [Indexed: 12/20/2023] Open
Abstract
Li metal batteries using Li metal as negative electrode and LiNi1-x-yMnxCoyO2 as positive electrode represent the next generation high-energy batteries. A major challenge facing these batteries is finding electrolytes capable of forming good interphases. Conventionally, electrolyte is fluorinated to generate anion-derived LiF-rich interphases. However, their low ionic conductivities forbid fast-charging. Here, we use CsNO3 as a dual-functional additive to form stable interphases on both electrodes. Such strategy allows the use of 1,2-dimethoxyethane as the single solvent, promising superior ion transport and fast charging. LiNi1-x-yMnxCoyO2 is protected by the nitrate-derived species. On the Li metal side, large Cs+ has weak interactions with the solvent, leading to presence of anions in the solvation sheath and an anion-derived interphase. The interphase is surprisingly dominated by cesium bis(fluorosulfonyl)imide, a component not reported before. Its presence suggests that Cs+ is doing more than just electrostatic shielding as commonly believed. The interphase is free of LiF but still promises high performance as cells with high LiNi0.8Mn0.1Co0.1O2 loading (21 mg/cm2) and low N/P ratio (~2) can be cycled at 2C (~8 mA/cm2) with above 80% capacity retention after 200 cycles. These results suggest the role of LiF and Cs-containing additives need to be revisited.
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Affiliation(s)
| | - Sha Tan
- Chemistry division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yang Yang
- National Synchrotron Lightsource II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Hui Zhong
- Department of Joint Photon Sciences Institute, Stony Brook University, Stony Brook, NY, 11970, USA
| | - Sanjit Ghose
- National Synchrotron Lightsource II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Iradwikanari Waluyo
- National Synchrotron Lightsource II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Adrian Hunt
- National Synchrotron Lightsource II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Lu Ma
- National Synchrotron Lightsource II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Xiao-Qing Yang
- Chemistry division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Enyuan Hu
- Chemistry division, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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3
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Yan H, Li S, Zhong J, Li B. An Electrochemical Perspective of Aqueous Zinc Metal Anode. NANO-MICRO LETTERS 2023; 16:15. [PMID: 37975948 PMCID: PMC10656387 DOI: 10.1007/s40820-023-01227-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 09/28/2023] [Indexed: 11/19/2023]
Abstract
Based on the attributes of nonflammability, environmental benignity, and cost-effectiveness of aqueous electrolytes, as well as the favorable compatibility of zinc metal with them, aqueous zinc ions batteries (AZIBs) become the leading energy storage candidate to meet the requirements of safety and low cost. Yet, aqueous electrolytes, acting as a double-edged sword, also play a negative role by directly or indirectly causing various parasitic reactions at the zinc anode side. These reactions include hydrogen evolution reaction, passivation, and dendrites, resulting in poor Coulombic efficiency and short lifespan of AZIBs. A comprehensive review of aqueous electrolytes chemistry, zinc chemistry, mechanism and chemistry of parasitic reactions, and their relationship is lacking. Moreover, the understanding of strategies for suppressing parasitic reactions from an electrochemical perspective is not profound enough. In this review, firstly, the chemistry of electrolytes, zinc anodes, and parasitic reactions and their relationship in AZIBs are deeply disclosed. Subsequently, the strategies for suppressing parasitic reactions from the perspective of enhancing the inherent thermodynamic stability of electrolytes and anodes, and lowering the dynamics of parasitic reactions at Zn/electrolyte interfaces are reviewed. Lastly, the perspectives on the future development direction of aqueous electrolytes, zinc anodes, and Zn/electrolyte interfaces are presented.
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Affiliation(s)
- Huibo Yan
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Songmei Li
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Jinyan Zhong
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China.
| | - Bin Li
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China.
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4
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Fricke S, Harnau M, Hetsch F, Liu H, Leonhard J, Eylmann A, Knauff P, Sun H, Semtner M, Meier JC. Cesium activates the neurotransmitter receptor for glycine. Front Mol Neurosci 2023; 16:1018530. [PMID: 37284465 PMCID: PMC10239821 DOI: 10.3389/fnmol.2023.1018530] [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: 08/16/2022] [Accepted: 05/02/2023] [Indexed: 06/08/2023] Open
Abstract
The monovalent cations sodium and potassium are crucial for the proper functioning of excitable cells, but, in addition, other monovalent alkali metal ions such as cesium and lithium can also affect neuronal physiology. For instance, there have been recent reports of adverse effects resulting from self-administered high concentrations of cesium in disease conditions, prompting the Food and Drug Administration (FDA) to issue an alert concerning cesium chloride. As we recently found that the monovalent cation NH4+ activates glycine receptors (GlyRs), we investigated the effects of alkali metal ions on the function of the GlyR, which belongs to one of the most widely distributed neurotransmitter receptors in the peripheral and central nervous systems. Whole-cell voltage clamp electrophysiology was performed with HEK293T cells transiently expressing different splice and RNA-edited variants of GlyR α2 and α3 homopentameric channels. By examining the influence of various milli- and sub-millimolar concentrations of lithium, sodium, potassium, and cesium on these GlyRs in comparison to its natural ligand glycine (0.1 mM), we could show that cesium activates GlyRs in a concentration- and post-transcriptional-dependent way. Additionally, we conducted atomistic molecular dynamic simulations on GlyR α3 embedded in a membrane bilayer with potassium and cesium, respectively. The simulations revealed slightly different GlyR-ion binding profiles for potassium and cesium, identifying interactions near the glycine binding pocket (potassium and cesium) and close to the RNA-edited site (cesium) in the extracellular GlyR domain. Together, these findings show that cesium acts as an agonist of GlyRs.
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Affiliation(s)
- Steffen Fricke
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Magnus Harnau
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Florian Hetsch
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Haoran Liu
- Structural Chemistry and Computational Biophysics, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
- Institute of Chemistry, Technical University of Berlin, Berlin, Germany
| | - Julia Leonhard
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Anna Eylmann
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Pina Knauff
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Han Sun
- Structural Chemistry and Computational Biophysics, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
- Institute of Chemistry, Technical University of Berlin, Berlin, Germany
| | - Marcus Semtner
- Psychoneuroimmunology, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Jochen C. Meier
- Division Cell Physiology, Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
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5
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Zhou K, Qian C, Liu Y. Quantifying the Structure of Water and Hydrated Monovalent Ions by Density Functional Theory-Based Molecular Dynamics. J Phys Chem B 2022; 126:10471-10480. [PMID: 36451081 DOI: 10.1021/acs.jpcb.2c05330] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
The accurate description of the structures of water and hydrated ions is important in electrochemical desalination, ion separation, and supercapacitors. In this work, we present an ab initio atomistic simulation-based study to explore the structure of water and hydrated monovalent ions (Li+, Na+, K+, Rb+, F-, and Cl-) at ambient conditions using generalized gradient approximation (GGA)-based methods with and without van der Waals correction (PBE, PBE + D3, and revPBE + D3) and recently developed strongly constrained and appropriately normed (SCAN) meta-GGA. We find that both revPBE + D3 and SCAN can well capture the structure of bulk water with +30 K artificial high temperature in contrast to overstructuring water using PBE and PBE + D3. However, being the same as PBE + D3, revPBE + D3 overestimates the structure of the hydration shell, especially for monovalent cations. Surprisingly, SCAN can well match the experimental results of hydrated monovalent ions. Detailed structure analyzes of entropy reveal that the hydration shell under the level of PBE + D3 and revPBE + D3 is more disordered and looser than SCAN. The successful prediction of the flexible SCAN functional could facilitate the exploration of complex ionic processes in the aqueous phase, the interactions of hydrated ions with surfaces, and solvation states in nanopores at an accurate, efficient, predictive, and ab initio level.
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Affiliation(s)
- Ke Zhou
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, Suzhou215006, China.,Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi'an Jiaotong University, Xi'an710049, China
| | - Chen Qian
- Department of Mechanical Engineering, Zhejiang University, Hangzhou310058, China
| | - Yilun Liu
- Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi'an Jiaotong University, Xi'an710049, China
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6
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John S, Kühnle A. Hydration Structure at the Calcite-Water (10.4) Interface in the Presence of Rubidium Chloride. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:11691-11698. [PMID: 36120896 DOI: 10.1021/acs.langmuir.2c01745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Solid-liquid interfaces are of significant importance in a multitude of geochemical and technological fields. More specifically, the solvation structure plays a decisive role in the properties of the interfaces. Atomic force microscopy (AFM) has been used to resolve the interfacial hydration structure in the presence and absence of ions. Despite many studies investigating the calcite-water interface, the impact of ions on the hydration structure at this interface has rarely been studied. Here, we investigate the calcite-water interface at various concentrations (ranging from 0 to 5 M) of rubidium chloride (RbCl) using three-dimensional atomic force microscopy (3D AFM). We present molecularly resolved images of the hydration structure at the interface. Interestingly, the characteristic pattern of the hydration structure appears similar regardless of the RbCl concentration. The presence of the ions is detected in an indirect manner by more frequent contrast changes and slice displacements.
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Affiliation(s)
- Simon John
- Physical Chemistry I, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Angelika Kühnle
- Physical Chemistry I, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
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7
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Pethes I. Towards the correct microscopic structure of aqueous CsCl solutions with a comparison of classical interatomic potential models. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Singh A, Doan LC, Lou D, Wen C, Vinh NQ. Interfacial Layers between Ion and Water Detected by Terahertz Spectroscopy. J Chem Phys 2022; 157:054501. [DOI: 10.1063/5.0095932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dynamic fluctuations in hydrogen-bond network of water occur from femto- to nano-second timescale and provides insights into structural/dynamical aspects of water at ion-water interfaces. Employing terahertz spectroscopy assisted with molecular dynamics simulations, we study aqueous chloride solutions of five monovalent cations, namely, Li, Na, K, Rb and Cs. We show that ions modify the behavior of surrounding water molecules and form interfacial layers of water around them with physical properties distinct from that of bulk water. Small cations with high charge densities influence the kinetics of water well beyond the first solvation shell. At terahertz frequencies, we observe an emergence of fast relaxation processes of water with their magnitude following the ionic order Cs>Rb>K>Na>Li, revealing an enhanced population density of weakly coordinated water at ion-water interface. The results shed light on the structure breaking tendency of monovalent cations and provide insights into the properties of ionic solutions at the molecular level.
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Affiliation(s)
- Abhishek Singh
- Physics, Virginia Polytechnic Institute and State University, United States of America
| | - Luan C Doan
- Virginia Polytechnic Institute and State University, United States of America
| | - Djamila Lou
- Virginia Polytechnic Institute and State University, United States of America
| | - Chengyuan Wen
- Virginia Polytechnic Institute and State University - National Capital Region, United States of America
| | - Nguyen Q Vinh
- Department of Physics, Virginia Polytechnic Institute and State University, United States of America
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9
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Yamaguchi A, Nagata K, Kobayashi K, Tanaka K, Kobayashi T, Tanida H, Shimojo K, Sekiguchi T, Kaneta Y, Matsuda S, Yokoyama K, Yaita T, Yoshimura T, Okumura M, Takahashi Y. EXAFS spectroscopy measurements and ab initio molecular dynamics simulations reveal the hydration structure of the radium(II) ion. iScience 2022; 25:104763. [PMID: 35992079 PMCID: PMC9386089 DOI: 10.1016/j.isci.2022.104763] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/27/2022] [Accepted: 07/09/2022] [Indexed: 12/02/2022] Open
Abstract
Radium is refocused from the viewpoint of an environmental pollutant and cancer therapy using alpha particles, where it mainly exists as a hydrated ion. We investigated the radium hydration structure and the dynamics of water molecules by extended X-ray absorption fine structure (EXAFS) spectroscopy and ab initio molecular dynamics (AIMD) simulation. The EXAFS experiment showed that the coordination number and average distance between radium ion and the oxygen atoms in the first hydration shell are 9.2 ± 1.9 and 2.87 ± 0.06 Å, respectively. They are consistent with those obtained from the AIMD simulations, 8.4 and 2.88 Å. The AIMD simulations also revealed that the water molecules in the first hydration shell of radium are less structured and more mobile than those of barium, which is an analogous element of radium. Our results indicate that radium can be more labile than barium in terms of interactions with water. Extended X-ray absorption fine structure (EXAFS) measurement revealed the hydration structure of radium ion Ab initio molecular dynamics (AIMD) simulation brought consistent results AIMD revealed the structural and dynamic properties of the water molecules The hydration structure of radium ion is more labile than that of barium ion
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10
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Beverley KM, Shahi PK, Kabra M, Zhao Q, Heyrman J, Steffen J, Pattnaik BR. Kir7.1 disease mutant T153I within the inner pore affects K+ conduction. Am J Physiol Cell Physiol 2022; 323:C56-C68. [PMID: 35584325 DOI: 10.1152/ajpcell.00093.2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Inward-rectifier potassium channel 7.1 (Kir7.1) is present in polarized epithelium, including the RPE. A single amino acid change at position 153 in the KCNJ13 gene, a substitution of threonine to isoleucine in Kir7.1 protein, causes blindness. We hypothesized that the disease caused by this single amino acid substitution within the transmembrane protein domain could alter the translation, localization, or ion transport properties. We assessed the effects of amino acid side-chain length, arrangement, and polarity on channel structure and function. We showed that the T153I mutation yielded a full-length protein localized to the cell membrane. Whole-cell patch-clamp recordings and chord conductance analyses revealed that the T153I mutant channel had negligible K+ conductance and failed to hyperpolarize the membrane potential. However, the mutant channel exhibited enhanced inward current when Rb+ was used as a charge carrier, suggesting that an inner pore had formed, and the channel was dysfunctional. Substituting with a polar, non-polar, or short side-chain amino acid did not affect the localization of the protein. Still, it had an altered channel function due to differences in pore radius. Polar side chains (cysteine and serine) with inner pore radii comparable to wildtype exhibited normal inward K+ conductance. Short side-chains (glycine and alanine) produced a channel with wider than expected inner pore size and lacked the biophysical characteristics of the wildtype channel. Leucine substitution produced results similar to the T153I mutant channel. This study provides direct electrophysiological evidence for the structure and function of the Kir7.1 channel's narrow inner pore in regulating conductance.
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Affiliation(s)
- Katie M Beverley
- Endocrinology and Reproductive Physiology Graduate Program, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,McPherson Eye Research Institute, University of Wisconsin, Madison, WI, United States
| | - Pawan K Shahi
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,McPherson Eye Research Institute, University of Wisconsin, Madison, WI, United States
| | - Meha Kabra
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,McPherson Eye Research Institute, University of Wisconsin, Madison, WI, United States
| | - Qianqian Zhao
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Joseph Heyrman
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Jack Steffen
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Bikash R Pattnaik
- Endocrinology and Reproductive Physiology Graduate Program, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.,McPherson Eye Research Institute, University of Wisconsin, Madison, WI, United States.,Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
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11
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Lunkenheimer K, Prescher D, Geggel K. Role of Counterions in the Adsorption and Micellization Behavior of 1:1 Ionic Surfactants at Fluid Interfaces─Demonstrated by the Standard Amphiphile System of Alkali Perfluoro- n-octanoates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:891-902. [PMID: 34995078 PMCID: PMC8793141 DOI: 10.1021/acs.langmuir.1c00527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 12/21/2021] [Indexed: 06/14/2023]
Abstract
In our latest communication, we proved experimentally that the ionic surfactant's surface excess is exclusively determined by the size of the hydrated counterion.[Lunkenheimer , Langmuir, 2017, 33, 10216-1022410.1021/acs.langmuir.7b00786]. However, at this stage of research, we were unable to decide whether this does only hold for the two or three lightest ions of lithium, sodium, and potassium, respectively. Alternatively, we could also consider the surface excess of the heavier hydrated alkali ions of potassium, rubidium, and cesium, having practically identical ion size, as being determined by the cross-sectional area of the related anionic extended chain residue. The latter assumption has represented state of art. Searching for reliable experimental results on the effect of the heavier counterions on the boundary layer, we have extended investigations to the amphiphiles' solutions of concentrations above the critical concentration of micelle formation (cmc).We provided evidence that the super-micellar solutions' equilibrium surface tension will remain constant provided the required conditions are followed. The related σcmc-value represents a parameter characteristic of the ionic surfactant's adsorption and micellization behavior. Evaluating the amphiphile's surface excess obtained from adsorption as a function of the related amphiphile's σcmc-value enables you to calculate the radius of the hydrated counterion valid in sub- and super-micellar solution likewise. The σcmc-value is directly proportional to the counterion's diameter concerned. Taking additionally into account the radii of naked ions known from crystal research, we succeeded in exactly discriminating the hydrated alkali ions' size from each other. There is a distinct sequence of hydration radii in absolute scale following the inequality, Li+ > Na+ > K+ > (NH4)+ > Rb+ > Cs+. Therefore, we have to extend our model of counterion effectiveness put forward in our previous communication. It represents a general principle of the counterion effect.
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Affiliation(s)
- Klaus Lunkenheimer
- Max-Planck-Institut
für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, Potsdam D-14476, Germany
| | - Dietrich Prescher
- Max-Planck-Institut
für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, Potsdam D-14476, Germany
| | - Katrina Geggel
- Max-Planck-Institut
für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, Potsdam D-14476, Germany
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12
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Xu L, Okrut A, Tate GL, Ohnishi R, Wu KL, Xie D, Kulkarni A, Takewaki T, Monnier JR, Katz A. Cs-RHO Goes from Worst to Best as Water Enhances Equilibrium CO 2 Adsorption via Phase Change. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13903-13908. [PMID: 34792360 DOI: 10.1021/acs.langmuir.1c02430] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The strong affinity of water to zeolite adsorbents has made adsorption of CO2 from humid gas mixtures such as flue gas nearly impossible under equilibrated conditions. Here, in this manuscript, we describe a unique cooperative adsorption mechanism between H2O and Cs+ cations on Cs-RHO zeolite, which actually facilitates the equilibrium adsorption of CO2 under humid conditions. Our data demonstrate that, at a relative humidity of 5%, Cs-RHO adsorbs 3-fold higher amounts of CO2 relative to dry conditions, at a temperature of 30 °C and CO2 pressure of 1 bar. A comparative investigation of univalent cation-exchanged RHO zeolites with H+, Li+, Na+, K+, Rb+, and Cs+ shows an increase of equilibrium CO2 adsorption under humid versus dry conditions to be unique to Cs-RHO. In situ powder X-ray diffraction indicates the appearance of a new phase with Im3̅m symmetry after H2O saturation of Cs-RHO. A mixed-cation exchanged NaCs-RHO exhibits similar phase transitions after humid CO2 adsorption; however, we found no evidence of cooperativity between Cs+ and Na+ cations in adsorption, in single-component H2O and CO2 adsorption. We hypothesize based on previous Rietveld refinements of CO2 adsorption in Cs-RHO zeolite that the observed phase change is related to solvation of extra-framework Cs+ cations by H2O. In the case of Cs-RHO, molecular modeling results suggest that hydration of these cations favors their migration from an original D8R position to S8R sites. We posit that this movement enables a trapdoor mechanism by which CO2 can interact with Cs+ at S8R sites to access the α-cage.
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Affiliation(s)
- Le Xu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley MC 1462, California 94720, United States
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley MC 1462, California 94720, United States
| | - Gregory L Tate
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ryohji Ohnishi
- Mitsubishi Chemical Corporation, Science and Innovation Center, 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-8502, Japan
| | - Kun-Lin Wu
- Department of Chemical Engineering, University of California-Davis, Davis, California 95616, United States
| | - Dan Xie
- Chevron Energy Technology Company, Richmond, California 94801, United States
| | - Ambarish Kulkarni
- Department of Chemical Engineering, University of California-Davis, Davis, California 95616, United States
| | - Takahiko Takewaki
- Mitsubishi Chemical Corporation, Science and Innovation Center, 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-8502, Japan
| | - John R Monnier
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley MC 1462, California 94720, United States
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13
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Reynolds JG. Solubilities in aqueous nitrate solutions that appear to reverse the law of mass action. Phys Chem Chem Phys 2021; 23:21407-21418. [PMID: 34553199 DOI: 10.1039/d1cp03124d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-ideal aqueous electrolyte solutions have been studied since the start of the application of thermodynamics to chemistry in the late 19th century. The present study examines some of the most extreme non-ideal behavior ever observed: solubilities of alkali and NH4+ nitrate salts in water that appear to behave the opposite of how the Law of Mass Action would predict. A literature review discovered that the solubilities of NH4NO3 and many alkali nitrate salts increases when another nitrate-bearing electrolyte is added to solution. These occurrences were in concentrated solutions with insufficient water to provide all ions their preferred hydration number without sharing waters between ions. This water deficit results in the formation of contact ion-pairs as well as larger ion-clusters. These ion-clusters may be favored when there is more than one type of monovalent cation present.
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Affiliation(s)
- Jacob G Reynolds
- Washington River Protection Solutions, LLC, P. O. Box 850, Richland, WA, 99352, USA.
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14
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Pappalardo RR, Caralampio DZ, Martínez JM, Sánchez Marcos E. Hydration of Heavy Alkaline-Earth Cations Studied by Molecular Dynamics Simulations and X-ray Absorption Spectroscopy. Inorg Chem 2021; 60:13578-13587. [PMID: 34387993 PMCID: PMC8512670 DOI: 10.1021/acs.inorgchem.1c01888] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The physicochemical properties of the three heaviest alkaline-earth cations, Sr2+, Ba2+, and Ra2+ in water have been studied by means of classical molecular dynamics (MD) simulations. A specific set of cation-water intermolecular potentials based on ab initio potential energy surfaces has been built on the basis of the hydrated ion concept. The polarizable and flexible model of water MCDHO2 was adopted. The theoretical-experimental comparison of structural, dynamical, energetic, and spectroscopical properties of Sr2+ and Ba2+ aqueous solutions is satisfactory, which supports the methodology developed. This good behavior allows a reasonable reliability for the predicted Ra2+ physicochemical data not experimentally determined yet. Simulated extended X-ray absorption fine-structure (EXAFS) and X-ray absorption near-edge spectroscopy spectra have been computed from the snapshots of the MD simulations and compared with the experimental information available for Sr2+ and Ba2+. For the Ra2+ case, the Ra L3-edge EXAFS spectrum is proposed. Structural and dynamical properties of the aqua ions for the three cations have been obtained and analyzed. Along the [M(H2O)n]m+ series, the M-O distance for the first-hydration shell is 2.57, 2.81, and 2.93 Å for Sr2+, Ba2+, and Ra2+, respectively. The hydration number also increases when one is going down along the group: 8.1, 9.4, and 9.8 for Sr2+, Ba2+, and Ra2+, respectively. Whereas [Sr(H2O)8]2+ is a typical aqua ion with a well-defined structure, the Ba2+ and Ra2+ hydration provides a picture exhibiting an average between the ennea- and the deca-hydration. These results show a similar chemical behavior of Ba2+ and Ra2+ aqueous solutions and support experimental studies on the removal of Ra-226 of aquifers by different techniques, where Ra2+ is replaced by Ba2+. A comparison of the heavy alkaline ions, Rb+ and Cs+, with the heavy alkaline-earth ions is made.
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Affiliation(s)
- Rafael R Pappalardo
- Department of Physical Chemistry, University of Seville, 41012 Seville, Seville, Spain
| | - Daniel Z Caralampio
- Department of Physical Chemistry, University of Seville, 41012 Seville, Seville, Spain
| | - José M Martínez
- Department of Physical Chemistry, University of Seville, 41012 Seville, Seville, Spain
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15
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Abstract
Fast excitatory synaptic transmission in the central nervous system relies on the AMPA-type glutamate receptor (AMPAR). This receptor incorporates a nonselective cation channel, which is opened by the binding of glutamate. Although the open pore structure has recently became available from cryo-electron microscopy (Cryo-EM), the molecular mechanisms governing cation permeability in AMPA receptors are not understood. Here, we combined microsecond molecular dynamic (MD) simulations on a putative open-state structure of GluA2 with electrophysiology on cloned channels to elucidate ion permeation mechanisms. Na+, K+, and Cs+ permeated at physiological rates, consistent with a structure that represents a true open state. A single major ion binding site for Na+ and K+ in the pore represents the simplest selectivity filter (SF) structure for any tetrameric cation channel of known structure. The minimal SF comprised only Q586 and Q587, and other residues on the cytoplasmic side formed a water-filled cavity with a cone shape that lacked major interactions with ions. We observed that Cl- readily enters the upper pore, explaining anion permeation in the RNA-edited (Q586R) form of GluA2. A permissive architecture of the SF accommodated different alkali metals in distinct solvation states to allow rapid, nonselective cation permeation and copermeation by water. Simulations suggested Cs+ uses two equally populated ion binding sites in the filter, and we confirmed with electrophysiology of GluA2 that Cs+ is slightly more permeant than Na+, consistent with serial binding sites preferentially driving selectivity.
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16
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Zhan C, Sun Y, Aydin F, Wang YM, Pham TA. Confinement effects on the solvation structure of solvated alkaline metal cations in a single-digit 1T-MoS 2 nanochannel: A first-principles study. J Chem Phys 2021; 154:164706. [PMID: 33940836 DOI: 10.1063/5.0047554] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Confinement plays an important role in determining ion transport in porous materials, which, in turn, may influence the performance of many energy storage and desalination devices. In this work, we combined density functional theory (DFT) with an implicit solvation model and ab initio molecular dynamics (AIMD) to investigate the effects of nanoconfinement on several solvated alkaline metal cations in a single-digit 1T-MoS2 nanochannel. Our DFT calculations with a solvation model indicated that cations with stronger hydration energy introduce a higher number of co-intercalated water molecules into the channel, consistent with early experimental observation obtained for MXene (2D transition metal carbide) channels. The predicted optimal water numbers for the cations were then used for AIMD simulations that explicitly include the effects of the solvent. When compared with the cations in bulk solution, our simulations showed that the hydration structure and coordination number (CN) of the solvated cations confined in the MoS2 channel can be significantly altered. We found that larger cations with weaker hydration energy (K+, Rb+, and Cs+) exhibited a distinctive CN decrease under confinement, while smaller cations (Li+ and Na+) retained a similar hydration shell as in the bulk solution. More specifically, the hydration shell of large cations (K+, Rb+, and Cs+) in MoS2 showed similar features of the coordination angle to the bulk, which suggests the partially broken hydration shell with no geometry change under confinement. Our simulations provided insights into the change of the hydration structure of alkaline metal cations under confinement, which may have important implications on their transport in the 1T-MoS2 channel.
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Affiliation(s)
- Cheng Zhan
- Material Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Yangyunli Sun
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | - Fikret Aydin
- Material Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Morris Wang
- Department of Materials Science and Engineering, University of California, Log Angeles, California 90095, USA
| | - Tuan Anh Pham
- Material Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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17
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Wu G, Terskikh V, Wong A. Perspectives of fast magic-angle spinning 87 Rb NMR of organic solids at high magnetic fields. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:162-171. [PMID: 32893369 DOI: 10.1002/mrc.5097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
We report solid-state 87 Rb NMR spectra from two Rb-ionophore complexes obtained with fast magic-angle spinning (MAS) (up to 60 kHz) at 21.1 T. These Rb-ionophore complexes containing macrocycles such as benzo-15-crown-5 and cryptand [2.2.2] are typical of organic Rb salts that exhibit very large 87 Rb quadrupole coupling constants (close to 20 MHz). We have also obtained static 87 Rb NMR spectra for these two compounds and determined both 87 Rb quadrupole coupling and chemical shift tensors. The experimental 87 Rb NMR tensor parameters are compared with those obtained by quantum chemical computations. Our results demonstrate that the combination of fast MAS (60 kHz or higher) and a high magnetic field (21.1 T or higher) is sufficient to produce high-quality solid-state 87 Rb NMR spectra for organic Rb solids at the natural abundance level. We anticipate that, with additional 87 Rb isotope enrichment (up to 99%), the sensitivity of solid-state 87 Rb NMR will be 400 times higher than 39 K NMR, which makes the former an attractive surrogate probe for studying K+ ion binding in biological systems.
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Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, Kingston, ON, Canada
| | - Victor Terskikh
- Department of Chemistry, Queen's University, Kingston, ON, Canada
- Department of Chemistry, University of Ottawa, Ottawa, ON, Canada
| | - Alan Wong
- Department of Chemistry, Queen's University, Kingston, ON, Canada
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18
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Hidayat Y, Rahmawati F, Nurcahyo IF, Prasetyo N, Pranowo HD. Hybrid Forces Molecular Dynamics on the Lability, Dynamics and “Structure Breaking Effect” of Cs+ in Liquid Ammonia. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuniawan Hidayat
- Department of Chemistry, Faculty of Mathematics and Sciences, Sebelas Maret University, Jl. Ir Sutami 36A Surakarta, 57126, Indonesia
- Austria-Indonesia Centre (AIC) for Computational Chemistry, Gadjah Mada University, Jl. Sekip Utara, Yogyakarta, 55281, Indonesia
| | - Fitria Rahmawati
- Department of Chemistry, Faculty of Mathematics and Sciences, Sebelas Maret University, Jl. Ir Sutami 36A Surakarta, 57126, Indonesia
| | - IF Nurcahyo
- Department of Chemistry, Faculty of Mathematics and Sciences, Sebelas Maret University, Jl. Ir Sutami 36A Surakarta, 57126, Indonesia
| | - Niko Prasetyo
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Gadjah Mada University, Jl. Sekip Utara, Yogyakarta, 55281, Indonesia
- Austria-Indonesia Centre (AIC) for Computational Chemistry, Gadjah Mada University, Jl. Sekip Utara, Yogyakarta, 55281, Indonesia
| | - Harno Dwi Pranowo
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Gadjah Mada University, Jl. Sekip Utara, Yogyakarta, 55281, Indonesia
- Austria-Indonesia Centre (AIC) for Computational Chemistry, Gadjah Mada University, Jl. Sekip Utara, Yogyakarta, 55281, Indonesia
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19
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Smirnov PR. Structure of the Nearest Environment of
Na+, K+,
Rb+, and Cs+ Ions in
Oxygen-Containing Solvents. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220090169] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Reynolds JG. The (almost) ideal thermodynamics of aqueous rubidium nitrite solutions from 0.3 to 62.3 molal. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137439] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Buchner R, Wachter W, Hefter G. Systematic Variations of Ion Hydration in Aqueous Alkali Metal Fluoride Solutions. J Phys Chem B 2019; 123:10868-10876. [DOI: 10.1021/acs.jpcb.9b09694] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Wolfgang Wachter
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Glenn Hefter
- Chemistry Department, Murdoch University, Murdoch, WA 6150, Australia
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22
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Caralampio DZ, Reeves B, Beccia MR, Martínez JM, Pappalardo RR, den Auwer C, Sánchez Marcos E. Revisiting the cobalt(II) hydration from molecular dynamics and X-ray absorption spectroscopy. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1650209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Benjamin Reeves
- Institut de Chimie de Nice, Université Côte d'Azur, CNRS, UMR 7272, Nice, France
| | - Maria R. Beccia
- Institut de Chimie de Nice, Université Côte d'Azur, CNRS, UMR 7272, Nice, France
| | - José M. Martínez
- Department of Physical Chemistry, University of Seville, Seville, Spain
| | | | - Christophe den Auwer
- Institut de Chimie de Nice, Université Côte d'Azur, CNRS, UMR 7272, Nice, France
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23
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Hayashi H, Aoki S, Takaishi M, Sato Y, Abe H. An XAFS study of Cs adsorption by the precipitation bands of Mn-Fe-based Prussian blue analogues spontaneously formed in agarose gel. Phys Chem Chem Phys 2019; 21:22553-22562. [PMID: 31588936 DOI: 10.1039/c9cp03661j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The adsorption of Cs+ ions by the precipitation bands of a Mn-Fe based Prussian blue analogue (Mn-Fe PBA) that form spontaneously in agarose gel was investigated by X-ray absorption fine structure spectroscopy coupled with scanning electron microscopy (SEM) and X-ray fluorescence (XRF) distribution analysis. Two gel samples were prepared by contacting a gel containing 0.05 M [Fe(CN)6]3- and 2.3 mass% agarose with a 0.50 M MnSO4 solution, into one of which a 0.10 M CsCl solution was introduced. The SEM images and the XRF intensity distributions reveal that Mn-Fe PBA forms cubic crystallites (approx. 3 × 3 × 3 μm in size) in the gels that trap Cs+ ions with considerably high affinity. Cs L3-edge and Mn K-edge X-ray absorption near-edge structure (XANES) spectra, which were analyzed with the aid of FEFF simulations, strongly suggest that Cs adsorption occurs at relatively large defect sites close to the sub-cube faces in the PBA. This suggestion is supported by Cs L3-edge extended X-ray absorption fine structure spectroscopy, which suggested that the first and second coordination shells around the Cs+ ions are at a Cs-O distance of 0.35 ± 0.02 nm and a Cs-N distance of 0.43 ± 0.01 nm, respectively, with coordination numbers of 1.5 ± 0.5 and 3.0 ± 0.5. The Mn K-edge XANES data also suggest that H2O molecules, which initially occupy many cubic centers in the Mn-Fe PBAs, are mostly displaced during Cs adsorption. These findings provide valuable insight toward fully understanding Cs adsorption by Mn-Fe PBA.
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Affiliation(s)
- Hisashi Hayashi
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
| | - Saya Aoki
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
| | - Mao Takaishi
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
| | - Yui Sato
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
| | - Hitoshi Abe
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan and Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI (the Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
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24
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León-Pimentel CI, Martínez-Jiménez M, Saint-Martin H. Study of the Elusive Hydration of Pb2+ from the Gas Phase to the Liquid Aqueous Solution: Modeling the Hemidirected Solvation with a Polarizable MCDHO Force-Field. J Phys Chem B 2019; 123:9155-9166. [DOI: 10.1021/acs.jpcb.9b04541] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. I. León-Pimentel
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apdo. Postal 48-3, Cuernavaca, Morelos 62251, Ḿexico
| | - M. Martínez-Jiménez
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apdo. Postal 48-3, Cuernavaca, Morelos 62251, Ḿexico
| | - H. Saint-Martin
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apdo. Postal 48-3, Cuernavaca, Morelos 62251, Ḿexico
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25
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van Lin S, Grotz KK, Siretanu I, Schwierz N, Mugele F. Ion-Specific and pH-Dependent Hydration of Mica-Electrolyte Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5737-5745. [PMID: 30974056 PMCID: PMC6495383 DOI: 10.1021/acs.langmuir.9b00520] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Hydration forces play a crucial role in a wide range of phenomena in physics, chemistry, and biology. Here, we study the hydration of mica surfaces in contact with various alkali chloride solutions over a wide range of concentrations and pH values. Using atomic force microscopy and molecular dynamics simulations, we demonstrate that hydration forces consist of a superposition of a monotonically decaying and an oscillatory part, each with a unique dependence on the specific type of cation. The monotonic hydration force gradually decreases in strength with decreasing bulk hydration energy, leading to a transition from an overall repulsive (Li+, Na+) to an attractive (Rb+, Cs+) force. The oscillatory part, in contrast, displays a binary character, being hardly affected by the presence of strongly hydrated cations (Li+, Na+), but it becomes completely suppressed in the presence of weakly hydrated cations (Rb+, Cs+), in agreement with a less pronounced water structure in simulations. For both aspects, K+ plays an intermediate role, and decreasing pH follows the trend of increasing Rb+ and Cs+ concentrations.
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Affiliation(s)
- Simone
R. van Lin
- Physics
of Complex Fluids Group and MESA+ Institute, Faculty of Science and
Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Kara K. Grotz
- Department
of Theoretical Biophysics, Max Planck Institute
of Biophysics, Max-von-Laue-Straße
3, 60438 Frankfurt
(Main), Germany
| | - Igor Siretanu
- Physics
of Complex Fluids Group and MESA+ Institute, Faculty of Science and
Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Nadine Schwierz
- Department
of Theoretical Biophysics, Max Planck Institute
of Biophysics, Max-von-Laue-Straße
3, 60438 Frankfurt
(Main), Germany
| | - Frieder Mugele
- Physics
of Complex Fluids Group and MESA+ Institute, Faculty of Science and
Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- E-mail:
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26
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Harada M, Okada T, Nakamura K, Saito S, Shibukawa M. Facilitated Dehydration of Rb
+
Ions in Cation‐Exchange Resin when Surrounded by Cs
+
Ions: A Marked Phenomenon in Superheated Water. ChemistrySelect 2019. [DOI: 10.1002/slct.201900388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Makoto Harada
- Department of ChemistryTokyo Institute of Technology, Meguro-ku Tokyo 152–8551 Japan
| | - Tetsuo Okada
- Department of ChemistryTokyo Institute of Technology, Meguro-ku Tokyo 152–8551 Japan
| | - Keisuke Nakamura
- Graduate School of Science and TechnologySaitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 Japan
| | - Shingo Saito
- Graduate School of Science and TechnologySaitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 Japan
| | - Masami Shibukawa
- Graduate School of Science and TechnologySaitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 Japan
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27
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Zhuang D, Riera M, Schenter GK, Fulton JL, Paesani F. Many-Body Effects Determine the Local Hydration Structure of Cs + in Solution. J Phys Chem Lett 2019; 10:406-412. [PMID: 30629438 DOI: 10.1021/acs.jpclett.8b03829] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A systematic analysis of the hydration structure of Cs+ ions in solution is derived from simulations carried out using a series of molecular models built upon a hierarchy of approximate representations of many-body effects in ion-water interactions. It is found that a pairwise-additive model, commonly used in biomolecular simulations, provides poor agreement with experimental X-ray spectra, indicating an incorrect description of the underlying hydration structure. Although the agreement with experiment improves in simulations with a polarizable model, the predicted hydration structure is found to lack the correct sequence of water shells. Progressive inclusion of explicit many-body effects in the representation of Cs+-water interactions as well as accounting for nuclear quantum effects is shown to be necessary for quantitatively reproducing the experimental X-ray spectra. Besides emphasizing the importance of many-body effects, these results suggest that molecular models rigorously derived from many-body expansions hold promise for realistic simulations of aqueous solutions.
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Affiliation(s)
- Debbie Zhuang
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Marc Riera
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Gregory K Schenter
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - John L Fulton
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Francesco Paesani
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
- Materials Science and Engineering , University of California, San Diego , La Jolla , California 92093 , United States
- San Diego Supercomputer Center , University of California, San Diego , La Jolla , California 92093 , United States
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28
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Pappalardo RR, Caralampio DZ, Martínez JM, Marcos ES. Hydration Structure of the Elusive Ac(III) Aqua Ion: Interpretation of X-ray Absorption Spectroscopy (XAS) Spectra on the Basis of Molecular Dynamics (MD) Simulations. Inorg Chem 2019; 58:2777-2783. [DOI: 10.1021/acs.inorgchem.8b03365] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - José M. Martínez
- Departmento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
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29
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Roy S, Bryantsev VS. Finding Order in the Disordered Hydration Shell of Rapidly Exchanging Water Molecules around the Heaviest Alkali Cs+ and Fr+. J Phys Chem B 2018; 122:12067-12076. [DOI: 10.1021/acs.jpcb.8b08414] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Santanu Roy
- Chemical Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, United States
| | - Vyacheslav S. Bryantsev
- Chemical Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, United States
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