1
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Oh H, Shin SJ, Choi E, Yamagishi H, Ohta T, Yabuuchi N, Jung HG, Kim H, Byon HR. Anion-Induced Interfacial Liquid Layers on LiCoO 2 in Salt-in-Water Lithium-Ion Batteries. JACS AU 2023; 3:1392-1402. [PMID: 37234123 PMCID: PMC10206596 DOI: 10.1021/jacsau.3c00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/27/2023]
Abstract
The incompatibility of lithium intercalation electrodes with water has impeded the development of aqueous Li-ion batteries. The key challenge is protons which are generated by water dissociation and deform the electrode structures through intercalation. Distinct from previous approaches utilizing large amounts of electrolyte salts or artificial solid-protective films, we developed liquid-phase protective layers on LiCoO2 (LCO) using a moderate concentration of 0.5∼3 mol kg-1 lithium sulfate. Sulfate ion strengthened the hydrogen-bond network and easily formed ion pairs with Li+, showing strong kosmotropic and hard base characteristics. Our quantum mechanics/molecular mechanics (QM/MM) simulations revealed that sulfate ion paired with Li+ helped stabilize the LCO surface and reduced the density of free water in the interface region below the point of zero charge (PZC) potential. In addition, in situ electrochemical surface-enhanced infrared absorption spectroscopy (SEIRAS) proved the appearance of inner-sphere sulfate complexes above the PZC potential, serving as the protective layers of LCO. The role of anions in stabilizing LCO was correlated with kosmotropic strength (sulfate > nitrate > perchlorate > bistriflimide (TFSI-)) and explained better galvanostatic cyclability in LCO cells.
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Affiliation(s)
- Hyunjeong Oh
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
| | - Seung-Jae Shin
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Eunjin Choi
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
| | - Hirona Yamagishi
- Sychrotron
Radiation (SR) Center, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Toshiaki Ohta
- Sychrotron
Radiation (SR) Center, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Naoaki Yabuuchi
- Department
of Chemistry and Life Science, Yokohama
National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Hun-Gi Jung
- Energy
Storage Research Center, Clean Energy Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hyungjun Kim
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hye Ryung Byon
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
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2
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Rana B, Fairhurst DJ, Jena KC. Ion-Specific Water-Macromolecule Interactions at the Air/Aqueous Interface: An Insight into Hofmeister Effect. J Am Chem Soc 2023; 145:9646-9654. [PMID: 37094217 DOI: 10.1021/jacs.3c00701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
The specificity of ions in inducing conformational changes in macromolecules is introduced as the Hofmeister series; however, the detailed underlying mechanism is not comprehensible yet. We utilized surface-specific sum frequency generation (SFG) vibrational spectroscopy to explore the Hofmeister effect at the air/polyvinylpyrrolidone (PVP)/water interface. The spectral signature observed from the ssp polarization scheme reveals ion-specific ordering of water molecules following the Hofmeister series attributed to the ion-macromolecule interactions. Along with this, the presence of ions does not reflect any significant influence on the structure of the PVP macromolecule. However, the ppp-SFG spectra in the CH-stretch region reveal the impact of ions on the orientation angle of vinyl chain CH2-groups, which follows the Hofmeister series: SO42- > Cl- > NO3- > Br- > ClO4- > SCN-. The minimal orientation angle of CH2-groups indicates significant reordering in PVP vinyl chains in the presence of chaotropic anions ClO4-, and SCN-. The observation is attributed to the ion-specific water-macromolecule interactions at the air/aqueous interface. It is compelling to observe the signature of spectral blue shifts in the OH-stretch region in the ppp configuration in the presence of chaotropic anions. The origin of spectral blue shifts has been ascribed to the existence of weaker interactions between the interfacial water molecules and the backbone CH- and CH2-moieties of the PVP macromolecules. The ion-specific modulation in water-macromolecule interactions is endorsed by the relative propensity of anion's adsorption toward the air/aqueous interface. The experimental findings highlight the existence and cooperative participation of ion-specific water-macromolecule interactions in the mechanism of the Hofmeister effect, along with the illustrious ion-water and ion-macromolecule interactions.
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Affiliation(s)
- Bhawna Rana
- Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - David J Fairhurst
- Department of Physics and Mathematics, School of Science and Technology, Nottingham Trent University, Clifton Campus, Nottingham NG11 8NS, U.K
| | - Kailash C Jena
- Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
- Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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3
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Knight BM, Edgar KJ, De Yoreo JJ, Dove PM. Chitosan as a Canvas for Studies of Macromolecular Controls on CaCO 3 Biological Crystallization. Biomacromolecules 2023; 24:1078-1102. [PMID: 36853173 DOI: 10.1021/acs.biomac.2c01394] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A mechanistic understanding of how macromolecules, typically as an organic matrix, nucleate and grow crystals to produce functional biomineral structures remains elusive. Advances in structural biology indicate that polysaccharides (e.g., chitin) and negatively charged proteoglycans (due to carboxyl, sulfate, and phosphate groups) are ubiquitous in biocrystallization settings and play greater roles than currently recognized. This review highlights studies of CaCO3 crystallization onto chitinous materials and demonstrates that a broader understanding of macromolecular controls on mineralization has not emerged. With recent advances in biopolymer chemistry, it is now possible to prepare chitosan-based hydrogels with tailored functional group compositions. By deploying these characterized compounds in hypothesis-based studies of nucleation rate, quantitative relationships between energy barrier to crystallization, macromolecule composition, and solvent structuring can be determined. This foundational knowledge will help researchers understand composition-structure-function controls on mineralization in living systems and tune the designs of new materials for advanced applications.
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Affiliation(s)
- Brenna M Knight
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kevin J Edgar
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - James J De Yoreo
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Patricia M Dove
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
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4
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van der Linde C, Ončák M, Cunningham EM, Tang WK, Siu CK, Beyer MK. Surface or Internal Hydration - Does It Really Matter? JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:337-354. [PMID: 36744598 PMCID: PMC9983018 DOI: 10.1021/jasms.2c00290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
The precise location of an ion or electron, whether it is internally solvated or residing on the surface of a water cluster, remains an intriguing question. Subtle differences in the hydrogen bonding network may lead to a preference for one or the other. Here we discuss spectroscopic probes of the structure of gas-phase hydrated ions in combination with quantum chemistry, as well as H/D exchange as a means of structure elucidation. With the help of nanocalorimetry, we look for thermochemical signatures of surface vs internal solvation. Examples of strongly size-dependent reactivity are reviewed which illustrate the influence of surface vs internal solvation on unimolecular rearrangements of the cluster, as well as on the rate and product distribution of ion-molecule reactions.
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Affiliation(s)
- Christian van der Linde
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Milan Ončák
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Ethan M. Cunningham
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Wai Kit Tang
- Institute
of Research Management and Services (IPPP), Research and Innovation
Management Complex, University of Malaya, Kuala Lumpur50603, Malaysia
| | - Chi-Kit Siu
- Department
of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, PR China
| | - Martin K. Beyer
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
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5
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Rana B, Fairhurst DJ, Jena KC. Investigation of Water Evaporation Process at Air/Water Interface using Hofmeister Ions. J Am Chem Soc 2022; 144:17832-17840. [PMID: 36131621 DOI: 10.1021/jacs.2c05837] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Evaporation is an interfacial phenomenon in which a water molecule breaks the intermolecular hydrogen (H-) bonds and enters the vapor phase. However, a detailed demonstration of the role of interfacial water structure in the evaporation process is still lacking. Here, we purposefully perturb the H-bonding environment at the air/water interface by introducing kosmotropic (HPO4-2, SO4-2, and CO3-2) and chaotropic ions (NO3- and I-) to determine their influence on the evaporation process. Using time-resolved interferometry on aqueous salt droplets, we found that kosmotropes reduce evaporation, whereas chaotropes accelerate the evaporation process, following the Hofmeister series: HPO4-2 < SO4-2 < CO3-2 < Cl- < NO3- < I-. To extract deeper molecular-level insights into the observed Hofmeister trend in the evaporation rates, we investigated the air/water interface in the presence of ions using surface-specific sum frequency generation (SFG) vibrational spectroscopy. The SFG vibrational spectra reveal the significant impact of ions on the strength of the H-bonding environment and the orientation of free OH oscillators from ∼36.2 to 48.4° at the air/water interface, where both the effects follow the Hofmeister series. It is established that the slow evaporating water molecules experience a strong H-bonding environment with free OH oscillators tilted away from the surface normal in the presence of kosmotropes. In contrast, the fast evaporating water molecules experience a weak H-bonding environment with free OH oscillators tilted toward the surface normal in the presence of chaotropes at the air/water interface. Our experimental outcomes showcase the complex bonding environment of interfacial water molecules and their decisive role in the evaporation process.
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Affiliation(s)
- Bhawna Rana
- Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - David J Fairhurst
- Department of Physics and Mathematics, School of Science and Technology, Nottingham Trent University, Clifton Campus, Nottingham NG11 8NS, United Kingdom
| | - Kailash C Jena
- Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India.,Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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6
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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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7
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Mi D, Xu J, Zhang Y, Zhu T, Ouyang J, Dong X, Chingin K. Formation of protonated water-hydrogen clusters in an ion trap mass spectrometer at room temperature. Phys Chem Chem Phys 2022; 24:7180-7184. [PMID: 35128554 DOI: 10.1039/d1cp04516d] [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
Protonated water-hydrogen clusters [H+(H2O)n·m(H2)] present an interesting model for fundamental water research, but their formation and isolation presents considerable experimental challenges. Here, we report the detection of [H+(H2O)n·m(H2)] (2 ≤ n ≤ 3, m ≤ 2) clusters alongside protonated water clusters H+(H2O)n (2 ≤ n ≤ 3) in a linear ion trap mass spectrometer under two different experimental conditions: (1) when water vapor was ionized by +5.5 kV ambient corona discharge in front of the mass spectrometer inlet; (2) when isolated H+(H2O)n clusters were exposed to H2 gas inside the linear trap. Chemical assignment of [H+(H2O)n·m(H2)] clusters was confirmed using reference experiments with isotopically labeled water and deuterium. Also, the formation of H2 gas in the corona discharge area was indicated by a flame test. Overall, our findings clearly indicate that [H+(H2O)n·m(H2)] clusters can be produced at room temperature through the association of protonated water clusters H+(H2O)n with H2 gas, without any cooling necessary. A mechanism for the formation of the protonated water-hydrogen complexes was proposed. Our results also suggest that the association of water ions with H2 gas may play a notable role in corona discharge ionization processes, such as atmospheric pressure chemical ionization, and may be partially responsible for the stabilization of reactive radical species occasionally reported in corona discharge ionization experiments.
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Affiliation(s)
- Dongbo Mi
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Junqiang Xu
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Yunpeng Zhang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Tenggao Zhu
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Jiewen Ouyang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Xiaofeng Dong
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
| | - Konstantin Chingin
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China.
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8
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Carre-Burritt AE, Van Hoomissen DJ, Vyas S. Role of Explicit Hydration in Predicting the Aqueous Standard Reduction Potential of Sulfate Radical Anion by DFT and Insight into the Influence of pH on the Reduction Potential. J Phys Chem A 2022; 126:1422-1428. [PMID: 35171595 DOI: 10.1021/acs.jpca.1c09459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sulfate radical anion (SO4•-) is a potent oxidant capable of destroying recalcitrant environmental contaminants such as perfluoroalkyl carboxylic acids. In addition, it is thought to participate in important atmospheric reactions. Its standard reduction potential (E°) is fundamental to its reactivity. Using theoretical methods to accurately predict the aqueous phase E° requires solvation with explicit water molecules. Herein, using density functional theory, we calculated the aqueous E° of SO4•- and evaluated sensitivity to explicit water count. The E° increased considerably with more waters until ca. 24 were included, after which change in E° was small. When a proton was added to these systems, the E° was similar regardless of the explicit water count and this value was similar to the E° for systems with a large number of explicit waters but no proton. This result agrees with literature evidence that the E° is pH independent. Natural Bond Orbital natural population analysis indicated that in the case of both SO42- and SO4•-, considerable charge was donated from the SO4 center to the explicit solvation shells.
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Affiliation(s)
- Asa E Carre-Burritt
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Daniel J Van Hoomissen
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Shubham Vyas
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
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9
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Clavaguéra C, Thaunay F, Ohanessian G. Manifolds of low energy structures for a magic number of hydrated sulfate: SO 42-(H 2O) 24. Phys Chem Chem Phys 2021; 23:24428-24438. [PMID: 34693943 DOI: 10.1039/d1cp03123f] [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
Low energy structures of SO42-(H2O)24 have been obtained using a combination of classical molecular dynamics simulations and refinement of structures and energies by quantum chemical calculations. Extensive exploration of the potential energy surface led to a number of low-energy structures, confirmed by accurate calibration calculations. An overall analysis of this large set was made after devising appropriate structural descriptors such as the numbers of cycles and their combinations. Low energy structures bear common motifs, the most prominent being fused cycles involving alternatively four and six water molecules. The latter adopt specific conformations which ensure the appropriate surface curvature to form a closed cage without dangling O-H bonds and at the same time provide 12-coordination of the sulfate ion. A prominent feature to take into account is isomerism via inversion of hydrogen bond orientations along cycles. This generates large families of ca. 100 isomers for this cluster size, spanning energy windows of 10-30 kJ mol-1. This relatively ignored isomerism must be taken into account to identify reliably the lowest energy minima. The overall picture is that the magic number cluster SO42-(H2O)24 does not correspond to formation of a single, remarkable structure, but rather to a manifold of structural families with similar stabilities. Extensive calculations on isomerization mechanisms within a family indicate that large barriers are associated to direct inversion of hydrogen bond networks. Possible implications of these results for magic number clusters of other anions are discussed.
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Affiliation(s)
- Carine Clavaguéra
- Institut de Chimie Physique, Université Paris-Saclay - CNRS, UMR 8000, 91405 Orsay, France.
| | - Florian Thaunay
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France.
| | - Gilles Ohanessian
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France.
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10
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Myllys N, Myers D, Chee S, Smith JN. Molecular properties affecting the hydration of acid-base clusters. Phys Chem Chem Phys 2021; 23:13106-13114. [PMID: 34060578 DOI: 10.1039/d1cp01704g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the atmosphere, water in all phases is ubiquitous and plays important roles in catalyzing atmospheric chemical reactions, participating in cluster formation and affecting the composition of aerosol particles. Direct measurements of water-containing clusters are limited because water is likely to evaporate before detection, and therefore, theoretical tools are needed to study hydration in the atmosphere. We have studied thermodynamics and population dynamics of the hydration of different atmospherically relevant base monomers as well as sulfuric acid-base pairs. The hydration ability of a base seems to follow in the order of gas-phase base strength whereas hydration ability of acid-base pairs, and thus clusters, is related to the number of hydrogen binding sites. Proton transfer reactions at water-air interfaces are important in many environmental and biological systems, but a deeper understanding of their mechanisms remain elusive. By studying thermodynamics of proton transfer reactions in clusters containing up to 20 water molecules and a base molecule, we found that that the ability of a base to accept a proton in a water cluster is related to the aqueous-phase basicity. We also studied the second deprotonation reaction of a sulfuric acid in hydrated acid-base clusters and found that sulfate formation is most favorable in the presence of dimethylamine. Molecular properties related to the proton transfer ability in water clusters are discussed.
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Affiliation(s)
- Nanna Myllys
- Department of Chemistry, University of California, Irvine, California 92617, USA and Department of Chemistry, University of Jyväskylä, Jyväskylä 40014, Finland.
| | - Deanna Myers
- Department of Chemistry, University of California, Irvine, California 92617, USA
| | - Sabrina Chee
- Department of Chemistry, University of California, Irvine, California 92617, USA
| | - James N Smith
- Department of Chemistry, University of California, Irvine, California 92617, USA
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11
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Herman KM, Heindel JP, Xantheas SS. The many-body expansion for aqueous systems revisited: III. Hofmeister ion-water interactions. Phys Chem Chem Phys 2021; 23:11196-11210. [PMID: 33899854 DOI: 10.1039/d1cp00409c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a Many Body Energy (MBE) analysis of aqueous ionic clusters containing anions and cations at the two opposite ends of the Hofmeister series, viz. the kosmotropes Ca2+ and SO42- and the chaotropes NH4+ and ClO4-, with 9 water molecules to quantify how these ions alter the interaction between the water molecules in their immediate surroundings. We specifically aim at quantifying how various ions (depending on their position in the Hofmeister series) affect the interaction between the surrounding water molecules and probe whether there is a qualitatively different behavior between kosmotropic vs. chaotropic ions. The current results when compared to the ones reported earlier for water clusters [J. P. Heindel and S. S. Xantheas, J. Chem. Theor. Comput., 2020, 16, 6843-6855] as well as for alkali metal and halide ion aqueous clusters of the same size [J. P. Heindel and S. S. Xantheas, J. Chem. Theor. Comput., 2021, 17, 2200-2216], which lie in the middle of the Hofmeister series, offer a complete account of the effect an ion across the Hofmeister series from "kosmotropes" to "chaotropes" has on the interaction between the neighboring water molecules. Through this analysis, noteworthy differences between the MBE of kosmotropes and chaotropes were identified. The MBE of kosmotropes is dominated by ion-water interactions that extend beyond the 4-body term, the rank at which the MBE of pure water converges. The percentage contribution of the 2-B term to the total cluster binding energy is noticeably larger. The disruption of the hydrogen bonded network due to the dominant ion-water interactions results in weak, unfavorable water-water interactions. The MBE for chaotropes, on the other hand, was found to converge more quickly as it more closely resembles that of pure water clusters. Chaotropes exhibit weaker overall binding energies and weaker ion-water interactions in favor of water-water interactions, somewhat recovering the pattern of the 2-4 body terms exemplified by pure water clusters. A remarkable anti-correlation between the 2-B ion-water (I-W) and water-water (W-W) interactions as well as between the 3-B (I-W-W) and (I-W) interactions was found for both kosmotropic and chaotropic ions. This anti-correlation is linear for both monatomic anions and monatomic cations, suggesting the existence of underlying physical mechanisms that were previously unexplored. The consideration of two different structural arrangements (ion inside and outside of a water cluster) suggests that fully solvated (ion inside) chaotropes disrupt the hydrogen bonding network in a similar manner to partially solvated (ion outside) kosmotropes and offers useful insights into the modeling requirements of bulk vs. interfacial ion solvation. It is noteworthy that the 2-B contribution to the total Basis Set Superposition Error (BSSE) correction for both kosmotropic and chaotropic ions follows the universal erf profile vs. intermolecular distance previously reported for pure water, halide ion-water and alkali metal ion-water clusters. When scaled for the corresponding dimer energies and distances, a single profile fits the current results together with all previously reported ones for pure water and halide water clusters. This finding lends further support to schemes for accurately estimating the 2-B BSSE correction in condensed environments.
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Affiliation(s)
- Kristina M Herman
- Department of Chemistry, University of Washington, Seattle, WA 98195, USA.
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12
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Knorke H, Li H, Warneke J, Liu ZF, Asmis KR. Cryogenic ion trap vibrational spectroscopy of the microhydrated sulfate dianions SO 42-(H 2O) 3-8. Phys Chem Chem Phys 2020; 22:27732-27745. [PMID: 33242322 DOI: 10.1039/d0cp04386a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Infrared photodissociation spectra of the D2-tagged microhydrated sulfate dianions with three to eight water molecules are presented over a broad spectral range that covers the OH stretching and H2O bending modes of the solvent molecules at higher energies, the sulfate stretching modes of the solute at intermediate energies and the intermolecular solute librational modes at the lowest energies. A low ion temperature combined with messenger-tagging ensures well-resolved vibrational spectra that allow for structure assignments based on a comparison to harmonic and anharmonic IR spectra from density functional theory (DFT) calculations. DFT ab initio molecular dynamics simulations are required to disentangle the broad and complex spectral signatures of microhydrated sulfate dianions in the OH stretching region and to identify systematic trends in the correlation of the strength and evolution of the solute-solvent and solvent-solvent interactions with cluster size. The onset for the formation of the second solvation shell is observed for n = 8.
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Affiliation(s)
- Harald Knorke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103 Leipzig, Germany.
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13
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Park KC, Tsukahara T. Expansion of Ion Effects on Water Induced by a High Hydrophilic Surface of a Polymer Network. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:159-168. [PMID: 31880466 DOI: 10.1021/acs.langmuir.9b02892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The spatial extent and anion-cation cooperativity of the ion effect on the structure and dynamics of water have long been debated but are still controversial. Previously, we experimentally demonstrated the extensive and cooperative effect of ions on water in a polyamide network by measuring the reflection wavelength (λ) on the ion sensor of poly(N-isopropylacrylamide) (PNIPAAm) hydrogel-immobilized photonic crystals. In the present study, we investigated the influence of the polymer surface on the ion effect by adopting a highly hydrophilic poly(N-isopropylacrylamide-co-N-acryloylaza-18-crown-6) hydrogel as a sensor matrix. In alkaline earth metal salt solutions, the copolymer hydrogel membrane sensor showed the redshift of λ for the specific combination of cations and anions, that is, Ca2+/Cl- and Sr2+/NO3-, which resulted from the concerted binding of ion pairs to the copolymer receptor. In alkali metal salt solutions, the ion sensor showed the blueshift of λ originating from the osmotic dehydration suppressed by the salts. The strength of the ion effect was evaluated by the average osmotic pressure (ΠA) required for the salt-inhibited dehydration in the early stage of hydrogel contraction. From the calculation results of ΠA for the copolymer and PNIPAAm hydrogels, it was found that the high hydrophilic copolymer surface more significantly enhanced the ion effect of structure-making cations (i.e., Li+) compared with borderline (Na+) and structure-breaking (K+ and Cs+) cations. Furthermore, the ion effect exhibited the higher ion cooperativity in combination with chloride anions than with nitrate anions. The enhancement of the long-range cooperative ion effect is derived from the expansion of the interactions between ions, water molecules, and the hydrophilic polymer network.
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Affiliation(s)
- Ki Chul Park
- Laboratory for Advanced Nuclear Energy , Institute of Innovative Research, Tokyo Institute of Technology , Tokyo 152-8550 , Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy , Institute of Innovative Research, Tokyo Institute of Technology , Tokyo 152-8550 , Japan
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14
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Sebastiani F, Verde AV, Heyden M, Schwaab G, Havenith M. Cooperativity and ion pairing in magnesium sulfate aqueous solutions from the dilute regime to the solubility limit. Phys Chem Chem Phys 2020; 22:12140-12153. [DOI: 10.1039/c9cp06845g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined THz and simulation study on MgSO4 find no contact ion pairs in highly concentrated solutions.
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Affiliation(s)
| | - Ana Vila Verde
- Department of Theory & Bio-systems
- Max Planck Institute for Colloids and Interfaces
- Potsdam
- Germany
| | - Matthias Heyden
- School of Molecular Sciences
- Arizona State University
- Tempe
- USA
| | - Gerhard Schwaab
- Department of Physical Chemistry II
- Ruhr-University Bochum
- Bochum
- Germany
| | - Martina Havenith
- Department of Physical Chemistry II
- Ruhr-University Bochum
- Bochum
- Germany
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15
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Herburger A, Ončák M, Siu C, Demissie EG, Heller J, Tang WK, Beyer MK. Infrared Spectroscopy of Size-Selected Hydrated Carbon Dioxide Radical Anions CO 2 .- (H 2 O) n (n=2-61) in the C-O Stretch Region. Chemistry 2019; 25:10165-10171. [PMID: 31132183 PMCID: PMC6771497 DOI: 10.1002/chem.201901650] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Indexed: 11/08/2022]
Abstract
Understanding the intrinsic properties of the hydrated carbon dioxide radical anions CO2 .- (H2 O)n is relevant for electrochemical carbon dioxide functionalization. CO2 .- (H2 O)n (n=2-61) is investigated by using infrared action spectroscopy in the 1150-2220 cm-1 region in an ICR (ion cyclotron resonance) cell cooled to T=80 K. The spectra show an absorption band around 1280 cm-1 , which is assigned to the symmetric C-O stretching vibration νs . It blueshifts with increasing cluster size, reaching the bulk value, within the experimental linewidth, for n=20. The antisymmetric C-O vibration νas is strongly coupled with the water bending mode ν2 , causing a broad feature at approximately 1650 cm-1 . For larger clusters, an additional broad and weak band appears above 1900 cm-1 similar to bulk water, which is assigned to a combination band of water bending and libration modes. Quantum chemical calculations provide insight into the interaction of CO2 .- with the hydrogen-bonding network.
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Affiliation(s)
- Andreas Herburger
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Chi‐Kit Siu
- Department of ChemistryCity University of Hong Kong83 Tat Chee AvenueKowloon Tong, Hong Kong SARP. R. China
| | - Ephrem G. Demissie
- Department of ChemistryCity University of Hong Kong83 Tat Chee AvenueKowloon Tong, Hong Kong SARP. R. China
| | - Jakob Heller
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Wai Kit Tang
- Department of ChemistryCity University of Hong Kong83 Tat Chee AvenueKowloon Tong, Hong Kong SARP. R. China
| | - Martin K. Beyer
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
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16
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Biswas S, Mallik BS. Heterogeneous Occupancy and Vibrational Dynamics of Spatially Patterned Water Molecules. J Phys Chem B 2019; 123:4278-4290. [PMID: 31018092 DOI: 10.1021/acs.jpcb.9b00271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We performed first-principles molecular dynamics simulations of relatively dilute aqueous solutions of sulfate and thiosulfate dianions to analyze the structure, dynamics, and vibrational spectral properties of water molecules around the solute, especially the spatially patterned solvent molecules in the first solvation layer and the extended layers. This study also involves the investigation of dynamics of dangling OH groups in these layers and their role in patterning the water molecules around the dianions. Structural evaluation of the systems is carried out by radial distribution functions, number integrals, and spatial distribution functions. The lifetime of dangling OH groups inside the solvation shell is compared more to that of the bulk. By constructing the O-H groups in three ensembles (S1, S2, and S3) around the anion, we show that the frequency distribution of OH modes in the S1 ensemble show red-shifting for both sulfate and thiosulfate. The O-H groups in the S2 ensemble of the sulfate-water system show red-shifting by 10 cm-1, while in the case of thiosulfate-water, these O-H groups show blue-shifting by 8 cm-1. The water molecules in S1 and S2 subensembles have slower dynamics compared to those in the bulk (S3). The dynamics of various kinds of hydrogen bonds were characterized by hydrogen bond population correlation functions. The spectral diffusion of solvation shell O-H modes was performed through a frequency-time correlation function. We find a significant amount of orientational retardation of water molecules in the S1 layer and moderate retardation in the S2 layer as compared to that in the bulk, S3 layer. All these findings, the red shift of the OH stretching frequency in S1 and S2 layers, slowing down of the orientational dynamics of OH vectors in S1 and S2 layers, and less diffusivity of water in S1 and S2 layers, show the long-range kosmotropic effect of multivalent sulfate and thiosulfate oxyanions. Due to the long-range effect, heterogeneous occupancy of water molecules is observed, and the water molecules are found to arrange in a patterned manner in the vicinity of anions with varied local density.
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Affiliation(s)
- Sohag Biswas
- Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, Sangareddy 502285 , Telangana , India
| | - Bhabani S Mallik
- Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, Sangareddy 502285 , Telangana , India
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17
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Kulichenko M, Fedik N, Bozhenko KV, Boldyrev AI. Hydrated Sulfate Clusters SO42–(H2O)n (n = 1–40): Charge Distribution Through Solvation Shells and Stabilization. J Phys Chem B 2019; 123:4065-4069. [DOI: 10.1021/acs.jpcb.9b01744] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maksim Kulichenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Nikita Fedik
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Konstantin V. Bozhenko
- Department of Physical and Colloid Chemistry, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Moscow Region, Russian Federation
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
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18
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Park KC, Tsukahara T. Quantitative Evaluation of Long-Range and Cooperative Ion Effect on Water in Polyamide Network. J Phys Chem B 2019; 123:2948-2955. [PMID: 30888819 DOI: 10.1021/acs.jpcb.9b00717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Despite long-standing research efforts to elucidate the specific ion effect on the structure and dynamics of water, the spatial extent affected by ions and the cooperativity of ions and counterions are still controversial. Here, we demonstrate an undoubtable evidence of long-range and cooperative ion effect on water molecules in a polyamide network by using a precision ion sensor of photonic crystal hydrogel membrane. The ion effect was quantitatively evaluated by means of the osmotic work per unit cell volume change of photonic crystal, Wunit, required for the ion-inhibited dehydration, which means a suppressed migration of water molecules by the extensive effect of ions beyond their immediate hydration shells. It was found that Wunit required for 14 vol % contraction of the membrane sensor in LiCl aqueous solutions was 7.7 times larger than that in Sr(NO3)2 solutions. The combination of structure-making Ca2+ and Sr2+ with nitrate anions lowered the ion effect than the chloride salts of borderline Na+ and Ba2+. Furthermore, the nitrate salt of Sr2+ exhibited a lower ion effect than the chloride salts of structure-breaking K+ and Cs+. These results have revealed that the ion effect acts to water extensively, which is modulated by cooperative interactions of ions and counterions.
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Affiliation(s)
- Ki Chul Park
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
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19
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Effect of Salts on Interfacial Tension and CO2 Mass Transfer in Carbonated Water Injection. ENERGIES 2019. [DOI: 10.3390/en12040748] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Carbonated water injection (CWI) is a promising enhanced oil recovery (EOR) and CO2 sequestration method, which overcomes the problems associated with CO2 EOR. CO2 mass transfer and interfacial tension (IFT) are important parameters that influence oil recovery efficiency. This study addresses the impact of MgCl2 and Na2SO4 in carbonated water (CW) on CW/hydrocarbon IFT and CO2 mass transfer. An axisymmetric drop shape analysis was used to estimate the IFT and the CO2 diffusion coefficient. It was found that CW+MgCl2 reduced both the CW/n-decane IFT (36.5%) and CO2 mass transfer, while CW+Na2SO4 increased both the IFT and CO2 mass transfer (57%). It is suggested that reduction in IFT for CW+MgCl2 brine is mainly due to the higher hydration energy of Mg2+. The Mg2+ ion forms a tight bond to the first hydration shell [Mg(H2O)6]2+, this increases the effective size at the interface, hence reduce IFT. Meanwhile, the SO42− outer hydration shell has free OH groups, which may locally promote CO2 mass transfer. The study illustrates the potential of combining salts and CW in enhancing CO2 mass transfer that can be the base for further investigations. Furthermore, the contribution and proposed mechanisms of the different ions (SO42− and Mg2+) to the physical process in carbonated water/hydrocarbon have been addressed, which forms one of primary bases of EOR.
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20
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Simon A, Rapacioli M, Michoulier E, Zheng L, Korchagina K, Cuny J. Contribution of the density-functional-based tight-binding scheme to the description of water clusters: methods, applications and extension to bulk systems. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1554903] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- A. Simon
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
| | - M. Rapacioli
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
| | - E. Michoulier
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
- Laboratoire Collisions Agrégats et Réactivité LCAR/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
| | - L. Zheng
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
| | - K. Korchagina
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
| | - J. Cuny
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, Université de Toulouse and CNRS, Toulouse, France
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21
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Mamatkulov SI, Rinne KF, Buchner R, Netz RR, Bonthuis DJ. Water-separated ion pairs cause the slow dielectric mode of magnesium sulfate solutions. J Chem Phys 2018; 148:222812. [DOI: 10.1063/1.5000385] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Shavkat I. Mamatkulov
- Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
- Ion-Plasma and Laser Technologies Institute of the Uzbekistan AS, Tashkent, Uzbekistan
| | - Klaus F. Rinne
- Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Roland R. Netz
- Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
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22
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Kelly JT, Mayer M, Kennedy AC, Schemel C, Asmis KR. Probing the propensity of perchlorate anions for surface solvation by infrared photodissociation spectroscopy. J Chem Phys 2018; 148:222840. [DOI: 10.1063/1.5028416] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- John T. Kelly
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany
| | - Martin Mayer
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany
| | - Adam C. Kennedy
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany
| | - Christian Schemel
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany
| | - Knut R. Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany
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23
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DiTucci MJ, Stachl CN, Williams ER. Long distance ion-water interactions in aqueous sulfate nanodrops persist to ambient temperatures in the upper atmosphere. Chem Sci 2018; 9:3970-3977. [PMID: 29780530 PMCID: PMC5942037 DOI: 10.1039/c8sc00854j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 03/27/2018] [Indexed: 01/15/2023] Open
Abstract
The effect of temperature on the patterning of water molecules located remotely from a single SO42- ion in aqueous nanodrops was investigated for nanodrops containing between 30 and 55 water molecules using instrument temperatures between 135 and 360 K. Magic number clusters with 24, 36 and 39 water molecules persist at all temperatures. Infrared photodissociation spectroscopy between 3000 and 3800 cm-1 was used to measure the appearance of water molecules that have a free O-H stretch at the nanodroplet surface and to infer information about the hydrogen bonding network of water in the nanodroplet. These data suggest that the hydrogen bonding network of water in nanodrops with 45 water molecules is highly ordered at 135 K and gradually becomes more amorphous with increasing temperature. An SO42- dianion clearly affects the hydrogen bonding network of water to at least ∼0.71 nm at 135 K and ∼0.60 nm at 340 K, consistent with an entropic drive for reorientation of water molecules at the surface of warmer nanodrops. These distances represent remote interactions into at least a second solvation shell even with elevated instrumental temperatures. The results herein provide new insight into the extent to which ions can structurally perturb water molecules even at temperatures relevant to Earth's atmosphere, where remote interactions may assist in nucleation and propagation of nascent aerosols.
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Affiliation(s)
- Matthew J DiTucci
- Department of Chemistry , University of California, Berkeley , B42 Hildebrand Hall , Berkeley , CA 94270 , USA .
| | - Christiane N Stachl
- Department of Chemistry , University of California, Berkeley , B42 Hildebrand Hall , Berkeley , CA 94270 , USA .
| | - Evan R Williams
- Department of Chemistry , University of California, Berkeley , B42 Hildebrand Hall , Berkeley , CA 94270 , USA .
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24
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Andreev M, de Pablo JJ, Chremos A, Douglas JF. Influence of Ion Solvation on the Properties of Electrolyte Solutions. J Phys Chem B 2018; 122:4029-4034. [DOI: 10.1021/acs.jpcb.8b00518] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marat Andreev
- Institute of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Juan J. de Pablo
- Institute of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Alexandros Chremos
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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25
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Hey JC, Doyle EJ, Chen Y, Johnston RL. Isomers and energy landscapes of micro-hydrated sulfite and chlorate clusters. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2018; 376:rsta.2017.0154. [PMID: 29431682 PMCID: PMC5805918 DOI: 10.1098/rsta.2017.0154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 11/22/2017] [Indexed: 06/08/2023]
Abstract
We present putative global minima for the micro-hydrated sulfite SO32-(H2O) N and chlorate ClO3-(H2O) N systems in the range 3≤N≤15 found using basin-hopping global structure optimization with an empirical potential. We present a structural analysis of the hydration of a large number of minimized structures for hydrated sulfite and chlorate clusters in the range 3≤N≤50. We show that sulfite is a significantly stronger net acceptor of hydrogen bonding within water clusters than chlorate, completely suppressing the appearance of hydroxyl groups pointing out from the cluster surface (dangling OH bonds), in low-energy clusters. We also present a qualitative analysis of a highly explored energy landscape in the region of the global minimum of the eight water hydrated sulfite and chlorate systems.This article is part of the theme issue 'Modern theoretical chemistry'.
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Affiliation(s)
- John C Hey
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
| | - Emily J Doyle
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
| | - Yuting Chen
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
| | - Roy L Johnston
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
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26
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Sullivan MR, Yao W, Tang D, Ashbaugh HS, Gibb BC. The Thermodynamics of Anion Complexation to Nonpolar Pockets. J Phys Chem B 2018; 122:1702-1713. [PMID: 29373793 PMCID: PMC10668596 DOI: 10.1021/acs.jpcb.7b12259] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The interactions between nonpolar surfaces and polarizable anions lie in a gray area between the hydrophobic and Hofmeister effects. To assess the affinity of these interactions, NMR and ITC were used to probe the thermodynamics of eight anions binding to four different hosts whose pockets each consist primarily of hydrocarbon. Two classes of host were examined: cavitands and cyclodextrins. For all hosts, anion affinity was found to follow the Hofmeister series, with associations ranging from 1.6-5.7 kcal mol-1. Despite the fact that cavitand hosts 1 and 2 possess intrinsic negative electrostatic fields, it was determined that these more enveloping hosts generally bound anions more strongly. The observation that the four hosts each possess specific anion affinities that cannot be readily explained by their structures, points to the importance of counter cations and the solvation of the "empty" hosts, free guests, and host-guest complexes, in defining the affinity.
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Affiliation(s)
- Matthew R. Sullivan
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Wei Yao
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Du Tang
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Henry S Ashbaugh
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Bruce C. Gibb
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
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27
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Ferreira LA, Uversky VN, Zaslavsky BY. Effects of the Hofmeister series of sodium salts on the solvent properties of water. Phys Chem Chem Phys 2018; 19:5254-5261. [PMID: 28150000 DOI: 10.1039/c6cp08214a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solvent features of water (solvent dipolarity/polarizability, π*, hydrogen bond donor acidity, α, and hydrogen bond acceptor basicity, β) were examined in aqueous solutions of Na2SO4, NaF, CH3COONa, NaCl, NaBr, NaI, and NaClO4 at concentrations of each salt from 0 to 1.0 M (up to 2.0 M for NaClO4). The solvent features of water in solutions of different concentrations for each salt were found to be linearly related as π* = z + aα + bβ. The coefficients of this relationship were suggested to represent the signature of the salt effect on the solvent features of water. The normalized distances for each salt were calculated using glucose as a reference compound. These distances may be used as the relative measures of the salt-water interactions. It is demonstrated that the distances for all salts examined are interrelated with structural water entropies and static polarizabilities of anions. It is shown that the distance may be used as a measure of the relative effects of salts on precipitation of ferric oxide, excessive chemical potential of propanol in salt solutions, surface tension, and viscosity. The distance represents the relative measure of the salt effect on the solvent features of water in a salt solution. The examples presented confirm that the approach used does enable us to characterize the differences between the effects of salts in the Hofmeister series on the properties of water.
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Affiliation(s)
- L A Ferreira
- Cleveland Diagnostics, 3615 Superior Ave., Suite 4407B, Cleveland, Ohio 44114, USA.
| | - V N Uversky
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - B Y Zaslavsky
- Cleveland Diagnostics, 3615 Superior Ave., Suite 4407B, Cleveland, Ohio 44114, USA.
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28
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Thaunay F, Jana C, Clavaguéra C, Ohanessian G. Strategy for Modeling the Infrared Spectra of Ion-Containing Water Drops. J Phys Chem A 2018; 122:832-842. [PMID: 29266957 DOI: 10.1021/acs.jpca.7b10554] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrated ions are ubiquitous in environmental and biological media. Understanding the perturbation exerted by an ion on the water hydrogen bond network is possible in the nanodrop regime by recording vibrational spectra in the O-H bond stretching region. This has been achieved experimentally in recent years by forming gaseous ions containing tens to hundreds of water molecules and recording their infrared photodissociation spectra. In this paper, we demonstrate the capabilities of a modeling strategy based on an extension of the AMOEBA polarizable force field to implement water atomic charge fluctuations along with those of intramolecular structure along the dynamics. This supplementary flexibility of nonbonded interactions improves the description of the hydrogen bond network and, therefore, the spectroscopic response. Finite temperature IR spectra are obtained from molecular dynamics simulations by computing the Fourier transform of the dipole moment autocorrelation function. Simulations of 1-2 ns are required for extensive sampling in order to reproduce the experimental spectra. Furthermore, bands are assigned with the driven molecular dynamics approach. This method package is shown to compare successfully with experimental spectra for 11 ions in water drops containing 36-100 water molecules. In particular, band frequency shifts of the free O-H stretching modes at the cluster surface are well reproduced as a function of both ion charge and drop size.
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Affiliation(s)
- Florian Thaunay
- LCM, CNRS, Ecole Polytechnique, Université Paris Saclay , 91128 Palaiseau, France
| | - Chandramohan Jana
- LCM, CNRS, Ecole Polytechnique, Université Paris Saclay , 91128 Palaiseau, France
| | - Carine Clavaguéra
- Laboratoire de Chimie Physique, Université Paris Sud - CNRS, Université Paris Saclay , 15, avenue Jean Perrin, 91405 Orsay Cedex, France
| | - Gilles Ohanessian
- LCM, CNRS, Ecole Polytechnique, Université Paris Saclay , 91128 Palaiseau, France
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29
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Affiliation(s)
- Mari Ojakivi
- Institute of Chemistry; University of Tartu; Ravila 14a Tartu 50411 Estonia
| | - Jaanus Liigand
- Institute of Chemistry; University of Tartu; Ravila 14a Tartu 50411 Estonia
| | - Anneli Kruve
- Institute of Chemistry and Biochemistry; Free University of Berlin; Takustr. 3 14195 Berlin Germany
- Institute of Chemistry; University of Tartu; Ravila 14a Tartu 50411 Estonia
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30
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Sharma B, Chandra A. Ab Initio Molecular Dynamics Simulation of the Phosphate Ion in Water: Insights into Solvation Shell Structure, Dynamics, and Kosmotropic Activity. J Phys Chem B 2017; 121:10519-10529. [DOI: 10.1021/acs.jpcb.7b06091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bikramjit Sharma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Amalendu Chandra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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31
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Okur H, Chen Y, Wilkins D, Roke S. The Jones-Ray effect reinterpreted: Surface tension minima of low ionic strength electrolyte solutions are caused by electric field induced water-water correlations. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.06.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Götte L, Parry KM, Hua W, Verreault D, Allen HC, Tobias DJ. Solvent-Shared Ion Pairs at the Air–Solution Interface of Magnesium Chloride and Sulfate Solutions Revealed by Sum Frequency Spectroscopy and Molecular Dynamics Simulations. J Phys Chem A 2017; 121:6450-6459. [DOI: 10.1021/acs.jpca.7b05600] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lisa Götte
- Lehrstuhl für
Theoretische Chemie, Ruhr-Universität, 44780 Bochum, Germany
| | - Krista M. Parry
- Department
of Chemistry, University of California, Irvine, California 92679-2025, United States
| | - Wei Hua
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Dominique Verreault
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Heather C. Allen
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Douglas J. Tobias
- Department
of Chemistry, University of California, Irvine, California 92679-2025, United States
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33
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Cooper RJ, O'Brien JT, Chang TM, Williams ER. Structural and electrostatic effects at the surfaces of size- and charge-selected aqueous nanodrops. Chem Sci 2017; 8:5201-5213. [PMID: 28970907 PMCID: PMC5618692 DOI: 10.1039/c7sc00481h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/17/2017] [Indexed: 11/23/2022] Open
Abstract
The effects of ion charge, polarity and size on the surface morphology of size-selected aqueous nanodrops containing a single ion and up to 550 water molecules are investigated with infrared photodissociation (IRPD) spectroscopy and theory.
The effects of ion charge, polarity and size on the surface morphology of size-selected aqueous nanodrops containing a single ion and up to 550 water molecules are investigated with infrared photodissociation (IRPD) spectroscopy and theory. IRPD spectra of M(H2O)n where M = La3+, Ca2+, Na+, Li+, I–, SO42– and supporting molecular dynamics simulations indicate that strong interactions between multiply charged ions and water molecules can disrupt optimal hydrogen bonding (H-bonding) at the nanodrop surface. The IRPD spectra also reveal that “free” OH stretching frequencies of surface-bound water molecules are highly sensitive to the ion's identity and the OH bond's local H-bond environment. The measured frequency shifts are qualitatively reproduced by a computationally inexpensive point-charge model that shows the frequency shifts are consistent with a Stark shift from the ion's electric field. For multiply charged cations, pronounced Stark shifting is observed for clusters containing ∼100 or fewer water molecules. This is attributed to ion-induced solvent patterning that extends to the nanodrop surface, and serves as a spectroscopic signature for a cation's ability to influence the H-bond network of water located remotely from the ion. The Stark shifts measured for the larger nanodrops are extrapolated to infinite dilution to obtain the free OH stretching frequency of a surface-bound water molecule at the bulk air–water interface (3696.5–3701.0 cm–1), well within the relatively wide range of values obtained from SFG measurements. These cluster measurements also indicate that surface curvature effects can influence the free OH stretching frequency, and that even nanodrops without an ion have a surface potential that depends on cluster size.
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Affiliation(s)
- Richard J Cooper
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , USA . ; Tel: +1 510 643 7161
| | - Jeremy T O'Brien
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , USA . ; Tel: +1 510 643 7161
| | - Terrence M Chang
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , USA . ; Tel: +1 510 643 7161
| | - Evan R Williams
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , USA . ; Tel: +1 510 643 7161
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34
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Wilkins DM, Manolopoulos DE, Roke S, Ceriotti M. Communication: Mean-field theory of water-water correlations in electrolyte solutions. J Chem Phys 2017. [DOI: 10.1063/1.4983221] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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35
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Gaiduk AP, Galli G. Local and Global Effects of Dissolved Sodium Chloride on the Structure of Water. J Phys Chem Lett 2017; 8:1496-1502. [PMID: 28267335 DOI: 10.1021/acs.jpclett.7b00239] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Determining how the structure of water is modified by the presence of salts is instrumental to understanding the solvation of biomolecules and, in general, the role played by salts in biochemical processes. However, the extent of hydrogen bonding disruption induced by salts remains controversial. We performed extensive first-principles simulations of solutions of a simple salt (NaCl) and found that, while the cation does not significantly change the structure of water beyond the first solvation shell, the anion has a further reaching effect, modifying the hydrogen-bond network even outside its second solvation shell. We found that a distinctive fingerprint of hydrogen bonding modification is the change in polarizability of water molecules. Molecular dipole moments are instead insensitive probes of long-range modifications induced by Na+ and Cl- ions. Though noticeable, the long-range effect of Cl- is expected to be too weak to affect solubility of large biomolecules.
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Affiliation(s)
- Alex P Gaiduk
- Institute for Molecular Engineering, The University of Chicago , Chicago, Illinois 60637, United States
| | - Giulia Galli
- Institute for Molecular Engineering, The University of Chicago , Chicago, Illinois 60637, United States
- Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
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36
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37
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Wang XB. Cluster Model Studies of Anion and Molecular Specificities via Electrospray Ionization Photoelectron Spectroscopy. J Phys Chem A 2017; 121:1389-1401. [PMID: 28060511 DOI: 10.1021/acs.jpca.6b09784] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ion specificity, a widely observed macroscopic phenomenon in condensed phases and at interfaces, is a fundamental chemical physics issue. Herein we report our recent studies of such effects using cluster models in an "atom-by-atom" and "molecule-by-molecule" fashion not possible with the condensed-phase methods. We use electrospray ionization (ESI) to generate molecular and ionic clusters to simulate key molecular entities involved in local binding regions and characterize them by employing negative ion photoelectron spectroscopy (NIPES). Inter- and intramolecular interactions and binding configurations are directly obtained as functions of the cluster size and composition, providing molecular-level descriptions and characterization over the local active sites that play crucial roles in determining the solution chemistry and condensed-phase phenomena. The topics covered in this article are relevant to a wide range of research fields from ion specific effects in electrolyte solutions, ion selectivity/recognition in normal functioning of life, to molecular specificity in aerosol particle formation, as well as in rational material design and synthesis.
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Affiliation(s)
- Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
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38
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DiTucci MJ, Böhm F, Schwaab G, Williams ER, Havenith M. Effects of multivalent hexacyanoferrates and their ion pairs on water molecule dynamics measured with terahertz spectroscopy. Phys Chem Chem Phys 2017; 19:7297-7306. [DOI: 10.1039/c6cp08423k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Broadband Fourier transform terahertz spectroscopy reveals that dynamical perturbations to the low-frequency dynamics of water molecules by multivalent hexacyanoferrate salts extend beyond the primary solvation shell.
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Affiliation(s)
| | - Fabian Böhm
- Department of Physical Chemistry II
- Ruhr-Universität Bochum
- Germany
| | - Gerhard Schwaab
- Department of Physical Chemistry II
- Ruhr-Universität Bochum
- Germany
| | | | - Martina Havenith
- Department of Physical Chemistry II
- Ruhr-Universität Bochum
- Germany
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39
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Liu L, Kou R, Liu G. Ion specificities of artificial macromolecules. SOFT MATTER 2016; 13:68-80. [PMID: 27906410 DOI: 10.1039/c6sm01773h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Artificial macromolecules are well-defined synthetic polymers, with a relatively simple structure as compared to naturally occurring macromolecules. This review focuses on the ion specificities of artifical macromolecules. Ion specificities are influenced by solvent-mediated indirect ion-macromolecule interactions and also by direct ion-macromolecule interactions. In aqueous solutions, the role of water-mediated indirect ion-macromolecule interactions will be discussed. The addition of organic solvents to aqueous solutions significantly changes the ion specificities due to the formation of water-organic solvent complexes. For direct ion-macromolecule interactions, we will discuss specific ion-pairing interactions for charged macromolecules and specific ion-neutral site interactions for uncharged macromolecules. When the medium conditions change from dilute solutions to crowded environments, the ion specificities can be modified by either the volume exclusion effect, the variation of dielectric constant, or the interactions between ions, macromolecules, and crowding agents.
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Affiliation(s)
- Lvdan Liu
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, P. R. China 230026.
| | - Ran Kou
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, P. R. China 230026.
| | - Guangming Liu
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, P. R. China 230026.
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40
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Korchagina KA, Simon A, Rapacioli M, Spiegelman F, Cuny J. Structural Characterization of Sulfur-Containing Water Clusters Using a Density-Functional Based Tight-Binding Approach. J Phys Chem A 2016; 120:9089-9100. [DOI: 10.1021/acs.jpca.6b08251] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kseniia A. Korchagina
- Laboratoire de Chimie et
Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
| | - Aude Simon
- Laboratoire de Chimie et
Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
| | - Mathias Rapacioli
- Laboratoire de Chimie et
Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
| | - Fernand Spiegelman
- Laboratoire de Chimie et
Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
| | - Jérôme Cuny
- Laboratoire de Chimie et
Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
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41
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DiTucci MJ, Williams ER. Nanometer patterning of water by tetraanionic ferrocyanide stabilized in aqueous nanodrops. Chem Sci 2016; 8:1391-1399. [PMID: 28451280 PMCID: PMC5361863 DOI: 10.1039/c6sc03722d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 10/16/2016] [Indexed: 11/21/2022] Open
Abstract
Formation of the small, highly charged tetraanion ferrocyanide, Fe(CN)64–, stabilized in aqueous nanodrops and its influence to the surrounding hydrogen-bonding network of water is reported.
Formation of the small, highly charged tetraanion ferrocyanide, Fe(CN)64–, stabilized in aqueous nanodrops is reported. Ion–water interactions inside these nanodrops are probed using blackbody infrared radiative dissociation, infrared photodissociation (IRPD) spectroscopy, and molecular modeling in order to determine how water molecules stabilize this highly charged anion and the extent to which the tetraanion patterns the hydrogen-bonding network of water at long distance. Fe(CN)64–(H2O)38 is the smallest cluster formed directly by nanoelectrospray ionization. Ejection of an electron from this ion to form Fe(CN)63–(H2O)38 occurs with low-energy activation, but loss of a water molecule is favored at higher energy indicating that water molecule loss is entropically favored over loss of an electron. The second solvation shell is almost complete at this cluster size indicating that nearly two solvent shells are required to stabilize this highly charged anion. The extent of solvation necessary to stabilize these clusters with respect to electron loss is substantially lower through ion pairing with either H+ or K+ (n = 17 and 18, respectively). IRPD spectra of Fe(CN)64–(H2O)n show the emergence of a free O–H water molecule stretch between n = 142 and 162 indicating that this ion patterns the structure of water molecules within these nanodrops to a distance of at least ∼1.05 nm from the ion. These results provide new insights into how water stabilizes highly charged ions and demonstrate that highly charged anions can have a significant effect on the hydrogen-bonding network of water molecules well beyond the second and even third solvation shells.
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Affiliation(s)
- Matthew J DiTucci
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94270 , USA .
| | - Evan R Williams
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94270 , USA .
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42
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Yan C, Xue Z, Zhao W, Wang J, Mu T. Surprising Hofmeister Effects on the Bending Vibration of Water. Chemphyschem 2016; 17:3309-3314. [PMID: 27412827 DOI: 10.1002/cphc.201600551] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Indexed: 11/06/2022]
Abstract
The Hofmeister series, which originally described the specific ion effects on the solubility of macromolecules in aqueous solutions, has been a long-standing unsolved and exceptionally challenging mystery in chemistry. The complexity of specific ion effects has prevented a unified theory from emerging. Accumulating research has suggested that the interactions among ions, water and various solutes play roles. However, among these interactions, the binding between ions and solutes is receiving most of the attention, whereas the effects of ions on the hydrogen-bond structure in liquid water have been deemed to be negligible. In this study, attenuated-total-reflectance Fourier transform infrared spectroscopy is used to study the infrared spectra of salt solutions. The results show that the red- and blue-shifts of the water bending band are in excellent agreement with the characteristic Hofmeister series, which suggests that the ions' effects on water structure might be the key role in the Hofmeister phenomenon.
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Affiliation(s)
- Chuanyu Yan
- Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Zhimin Xue
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Wancheng Zhao
- Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Jinfang Wang
- Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Tiancheng Mu
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
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43
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Hey JC, Smeeton LC, Oakley MT, Johnston RL. Isomers and Energy Landscapes of Perchlorate-Water Clusters and a Comparison to Pure Water and Sulfate-Water Clusters. J Phys Chem A 2016; 120:4008-15. [PMID: 27223243 DOI: 10.1021/acs.jpca.6b01495] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrated ions are crucially important in a wide array of environments, from biology to the atmosphere, and the presence and concentration of ions in a system can drastically alter its behavior. One way in which ions can affect systems is in their interactions with proteins. The Hofmeister series ranks ions by their ability to salt-out proteins, with kosmotropes, such as sulfate, increasing their stability and chaotropes, such as perchlorate, decreasing their stability. We study hydrated perchlorate clusters as they are strongly chaotropic and thus exhibit different properties than sulfate. In this study we simulate small hydrated perchlorate clusters using a basin-hopping geometry optimization search with empirical potentials. We compare topological features of these clusters to data from both computational and experimental studies of hydrated sulfate ions and draw some conclusions about ion effects in the Hofmeister series. We observe a patterning conferred to the water molecules within the cluster by the presence of the perchlorate ion and compare the magnitude of this effect to that observed in previous studies involving sulfate. We also investigate the influence of the overall ionic charge on the low-energy structures adopted by these clusters.
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Affiliation(s)
- John C Hey
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - Lewis C Smeeton
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - Mark T Oakley
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - Roy L Johnston
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
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44
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Besford QA, Liu M, Gray-Weale A. Pair correlations that link the hydrophobic and Hofmeister effects. Phys Chem Chem Phys 2016; 18:14949-59. [PMID: 27222936 DOI: 10.1039/c5cp05132k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Hofmeister effect describes how different ions make solutes more or less hydrophobic. The effect is thought to occur due to structural changes in the solvent induced by the ion's presence, particularly in water. In this study, the structural changes in water due to the presence of ions are investigated by molecular dynamics simulations of various monatomic ions in the SPC/E water model. Structural analyses reveal specific orientations of solvating waters around each of the ions studied. Using a new method, these orientations are quantified by a set of pair correlation functions that describe dipole-ion correlations in structure. These correlations are shown to contribute to the potential of mean force between waters and the ion of interest, and therefore to the free energy of the system. The magnitude of this free energy is found to result in a Hofmeister series for the various ions studied, therefore demonstrating a Hofmeister effect with respect to water's structure that is quantified by pair correlation functions. Most crucially, the pair correlations that lead to this Hofmeister effect also contribute to the hydrophobic effect (the entropy of hydrophobic solvation) [Liu et al., J. Chem. Phys., 2015, 142, 114117], and those which dominate the hydrophobic effect are modulated by an ion's presence, therefore demonstrating a mechanistic link between the two effects.
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Affiliation(s)
| | - Maoyuan Liu
- School of Chemistry, The University of Melbourne, Melbourne, Australia.
| | - Angus Gray-Weale
- School of Chemistry, The University of Melbourne, Melbourne, Australia.
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45
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He Z, Xie WJ, Liu Z, Liu G, Wang Z, Gao YQ, Wang J. Tuning ice nucleation with counterions on polyelectrolyte brush surfaces. SCIENCE ADVANCES 2016; 2:e1600345. [PMID: 27386581 PMCID: PMC4928907 DOI: 10.1126/sciadv.1600345] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 05/12/2016] [Indexed: 05/19/2023]
Abstract
Heterogeneous ice nucleation (HIN) on ionic surfaces is ubiquitous in a wide range of atmospheric aerosols and at biological interfaces. Despite its great importance in cirrus cloud formation and cryopreservation of cells, organs, and tissues, it remains unclear whether the ion-specific effect on ice nucleation exists. Benefiting from the fact that ions at the polyelectrolyte brush (PB)/water interface can be reversibly exchanged, we report the effect of ions on HIN on the PB surface, and we discover that the distinct efficiency of ions in tuning HIN follows the Hofmeister series. Moreover, a large HIN temperature window of up to 7.8°C is demonstrated. By establishing a correlation between the fraction of ice-like water molecules and the kinetics of structural transformation from liquid- to ice-like water molecules at the PB/water interface with different counterions, we show that our molecular dynamics simulation analysis is consistent with the experimental observation of the ion-specific effect on HIN.
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Affiliation(s)
- Zhiyuan He
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wen Jun Xie
- Beijing National Laboratory for Molecular Sciences, Institute of Theoretical and Computational Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhenqi Liu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Guangming Liu
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Zuowei Wang
- School of Mathematical and Physical Sciences, University of Reading, Whiteknights, Reading RG6 6AX, UK
| | - Yi Qin Gao
- Beijing National Laboratory for Molecular Sciences, Institute of Theoretical and Computational Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Corresponding author. (J.W.); (Y.Q.G.)
| | - Jianjun Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Corresponding author. (J.W.); (Y.Q.G.)
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46
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Andrić JM, Misini-Ignjatović MZ, Murray JS, Politzer P, Zarić SD. Hydrogen Bonding between Metal-Ion Complexes and Noncoordinated Water: Electrostatic Potentials and Interaction Energies. Chemphyschem 2016; 17:2035-42. [PMID: 26989883 DOI: 10.1002/cphc.201501200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Indexed: 12/28/2022]
Abstract
The hydrogen bonding of noncoordinated water molecules to each other and to water molecules that are coordinated to metal-ion complexes has been investigated by means of a search of the Cambridge Structural Database (CSD) and through quantum chemical calculations. Tetrahedral and octahedral complexes that were both charged and neutral were studied. A general conclusion is that hydrogen bonds between noncoordinated water and coordinated water are much stronger than those between noncoordinated waters, whereas hydrogen bonds of water molecule in tetrahedral complexes are stronger than in octahedral complexes. We examined the possibility of correlating the computed interaction energies with the most positive electrostatic potentials on the interacting hydrogen atoms prior to interaction and obtained very good correlation. This study illustrates the fact that electrostatic potentials computed for ground-state molecules, prior to interaction, can provide considerable insight into the interactions.
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Affiliation(s)
- Jelena M Andrić
- Innovation Center of the Department of Chemistry, Studentski trg 12-16, 11000, Belgrade, Serbia
| | | | - Jane S Murray
- Department of Chemistry, University of New Orleans, New Orleans, LA, 71048, USA
| | - Peter Politzer
- Department of Chemistry, University of New Orleans, New Orleans, LA, 71048, USA
| | - Snežana D Zarić
- Department of Chemistry, Texas A & M University at Qatar, P.O. Box 23874, Doha, Qatar. .,Department of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia.
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47
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Baul U, Kanth JMP, Anishetty R, Vemparala S. Effect of simple solutes on the long range dipolar correlations in liquid water. J Chem Phys 2016; 144:104502. [DOI: 10.1063/1.4943097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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48
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Light TP, Corbett KM, Metrick MA, MacDonald G. Hofmeister Ion-Induced Changes in Water Structure Correlate with Changes in Solvation of an Aggregated Protein Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1360-1369. [PMID: 26760222 DOI: 10.1021/acs.langmuir.5b04489] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
RecA is a naturally aggregating Escherichia coli protein that catalyzes the strand exchange reaction utilized in DNA repair. Previous studies have shown that the presence of salts influence RecA activity, aggregation, and stability and that salts stabilize RecA in an inverse-anionic Hofmeister series. Here we utilized attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and circular dichroism (CD) to investigate how various Hofmeister salts alter the water structure and RecA solvation and aggregation. Spectroscopic studies performed in water and deuterium oxide suggest that salts alter water O-(1)H and O-(2)H stretch and bend vibrations as well as protein amide I (or I') and amide II (or II') vibrations. Anions have a much larger influence on water vibrations than cations. Water studies also show increased water-water and/or water-ion interactions in the presence of strongly hydrated SO4(2-) salts and evidence for decreased interactions with weakly hydrated Cl(-) and ClO4(-) salts. Salt-water difference infrared spectra show that kosmotropic salts are more hydrated than chaotropic salts. Interestingly, this is the opposite trend to the changes in protein solvation. Infrared spectra of RecA show that vibrations associated with protein desolvation were observed in the presence of SO4(2-) salts. Conversely, vibrations associated with protein solvation were observed in the presence of Cl(-) and ClO4(-) salts. Difference infrared studies on the dehydration of model proteins aided in identifying changes in RecA-solvent interactions. This study provides evidence that salt-induced changes in water vibrations correlate to changes in protein solvent interactions and thermal stability.
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Affiliation(s)
- Taylor P Light
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Karen M Corbett
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Michael A Metrick
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Gina MacDonald
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
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49
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Zhang J, Dolg M. Global optimization of clusters of rigid molecules using the artificial bee colony algorithm. Phys Chem Chem Phys 2016; 18:3003-10. [DOI: 10.1039/c5cp06313b] [Citation(s) in RCA: 195] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The global optimization of molecular clusters is an important topic encountered in many fields of chemistry. Our free and black-box software ABCluster is a useful tool in solving this problem.
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Affiliation(s)
- Jun Zhang
- Theoretical Chemistry
- University of Cologne
- 50939 Cologne
- Germany
| | - Michael Dolg
- Theoretical Chemistry
- University of Cologne
- 50939 Cologne
- Germany
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Vila Verde A, Santer M, Lipowsky R. Solvent-shared pairs of densely charged ions induce intense but short-range supra-additive slowdown of water rotation. Phys Chem Chem Phys 2016; 18:1918-30. [DOI: 10.1039/c5cp05726d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnesium and sulfate ions in solvent-shared (SIP) ion pair configuration supra-additively slowdown the rotation of water molecules between them; water molecules around solvent-separated (2SIP) ion pairs show only additive slowdown.
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Affiliation(s)
- Ana Vila Verde
- Max Planck Institute of Colloids and Interfaces
- Theory and Bio-Systems Department
- 14424 Potsdam
- Germany
| | - Mark Santer
- Max Planck Institute of Colloids and Interfaces
- Theory and Bio-Systems Department
- 14424 Potsdam
- Germany
| | - Reinhard Lipowsky
- Max Planck Institute of Colloids and Interfaces
- Theory and Bio-Systems Department
- 14424 Potsdam
- Germany
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