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Méndez E, Videla PE, Laria D. Equilibrium and Dynamical Characteristics of Hydrogen Bond Bifurcations in Water-Water and Water-Ammonia Dimers: A Path Integral Molecular Dynamics Study. J Phys Chem A 2022; 126:4721-4733. [PMID: 35834556 DOI: 10.1021/acs.jpca.2c02525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present path integral molecular dynamics results that describe the effects of nuclear quantum fluctuations on equilibrium and dynamical characteristics pertaining to bifurcation pathways in hydrogen bonded dimers combining water and ammonia, at cryogenic temperatures of the order of 20 K. Along these isomerizations, the hydrogen atoms in the molecules acting as hydrogen-bond donors interchange their original dangling/connective characters. Our results reveal that the resulting quantum transition paths comprise three stages: the initial and final ones involve overall rotations during which the two protons retain their classical-like characteristics. Effects from quantum fluctuation are clearly manifested in the changes operated at the intermediate passages over transition states, as the spatial extents of the protons stretch over typical lengths comparable to the distances between connective and dangling basins of attractions. Consequently, the classical over-the-hill path is replaced by a tunneling controlled mechanism which, within the path integral perspective, can be cast in terms of concerted inter-basin migrations of polymer beads from dangling-to-connective and from connective-to-dangling, at practically no energy costs. We also estimated the characteristic timescales describing such interconversions within the approximate ring polymer rate theory. Effects derived from full and partial deuteration are also discussed.
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Affiliation(s)
- Emilio Méndez
- Departamento de Química Inorgánica, Analítica y Química-Física and INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
| | - Pablo E Videla
- Department of Chemistry and Energy Sciences Institute, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Daniel Laria
- Departamento de Física de la Materia Condensada, Comisión Nacional de Energía Atómica, Avenida Libertador 8250, 1429 Buenos Aires, Argentina
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2
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Méndez E, Laria D. Nuclear quantum effects on the hydrogen bond donor-acceptor exchange in water-water and water-methanol dimers. J Chem Phys 2020; 153:054302. [PMID: 32770908 DOI: 10.1063/5.0016122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present results from path integral molecular dynamics simulations that describe effects from the explicit incorporation of nuclear quantum fluctuations on the topology of the free energy associated with the geared exchange of hydrogen bonds in the water-water dimer. Compared to the classical treatment, our results reveal important reductions in the free energy barriers and changes at a qualitative level in the overall profile. Most notable are those manifested by a plateau behavior, ascribed to nuclear tunneling, which bridges reactant and product states, contrasting with the usual symmetric double-well profile. The characteristics of the proton localizations along the pathway are examined. An imaginary time analysis of the rotational degrees of freedom of the partners in the dimer at the vicinities of transition states shows a clear "anticorrelation" between intermolecular interactions coupling beads localized in connective and dangling basins of attractions. As such, the transfer is operated by gradual concerted inter-basin migrations in opposite directions, at practically no energy costs. Modifications operated by partial deuteration and by the asymmetries in the hydrogen bonding characteristics prevailing in water-methanol heterodimers are also examined.
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Affiliation(s)
- Emilio Méndez
- Departamento de Química Inorgánica Analítica y Química-Física e INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
| | - Daniel Laria
- Departamento de Química Inorgánica Analítica y Química-Física e INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
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3
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Sun Y, Yu F, Li C, Dai X, Ma J. Nano-/Micro-confined Water in Graphene Hydrogel as Superadsorbents for Water Purification. NANO-MICRO LETTERS 2019; 12:2. [PMID: 34138060 PMCID: PMC7770964 DOI: 10.1007/s40820-019-0336-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/11/2019] [Indexed: 05/07/2023]
Abstract
Confined water has been proven to be of great importance due to its pervasiveness and contribution to life and many fields of scientific research. However, the control and characterization of confined water are a challenge. Herein, a confined space is constructed by flexibly changing the pH of a graphene oxide dispersion under the self-assembly process of a graphene hydrogel (GH), and the confined space is adjusted with variation from 10.04 to 3.52 nm. Confined water content in GH increases when the pore diameter of the confined space decreases; the corresponding adsorption capacity increases from 243.04 to 442.91 mg g-1. Moreover, attenuated total reflectance Fourier transform infrared spectroscopy and Raman spectroscopy are utilized to analyze the hydrogen bonding structure qualitatively and quantitatively, and correlation analysis reveals that the improvement in the adsorption capacity is caused by incomplete hydrogen bonding in the confined water. Further, confined water is assembled into four typical porous commercial adsorbents, and a remarkable enhancement of the adsorption capacity is achieved. This research demonstrates the application potential for the extraordinary properties of confined water and has implications for the development of highly effective confined water-modified adsorbents.
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Affiliation(s)
- Yiran Sun
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
| | - Fei Yu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, People's Republic of China
| | - Cong Li
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China
| | - Jie Ma
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China.
- Research Center for Environmental Functional Materials, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China.
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Gupta PK, Schienbein P, Daru J, Marx D. Terahertz Spectra of Microsolvated Ions: Do They Reveal Bulk Solvation Properties? J Phys Chem Lett 2019; 10:393-398. [PMID: 30607961 DOI: 10.1021/acs.jpclett.8b03188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Complementing mid-infrared (mid-IR) spectroscopy mainly in the OH stretching region, liquid-state far-IR spectroscopy is successful in elucidating the properties of aqueous solutions by providing direct access to the hallmark of H-bonding at terahertz (THz) frequencies, namely, the H-bond network peak of water at roughly 200 cm-1 and its modifications in the hydration shells around solutes. Here, the idea is scrutinized whether ion hydration can be understood by studying the THz regime of "small" ion-water clusters in the gas phase as a function of size with subsequent extrapolation to the bulk limit. Our ab initio simulations of Na+(H2O) n clusters followed by rigorous decomposition of their THz response demonstrate that the 200 cm-1 network peak is suppressed even at n = 20 in the gas phase, yet it emerges when transferring ion-water complexes as small as n = 7 out of the liquid into vacuum. The underlying physical reason is not missing electronic polarization or charge-transfer effects in the gas phase, but rather the distinctly different structural dynamics of finite ion-water clusters in the gas phase compared to ion-water complexes of the same size in the liquid phase.
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Affiliation(s)
- Prashant Kumar Gupta
- Lehrstuhl für Theoretische Chemie , Ruhr-Universität Bochum , 44780 Bochum , Germany
| | - Philipp Schienbein
- Lehrstuhl für Theoretische Chemie , Ruhr-Universität Bochum , 44780 Bochum , Germany
| | - Janos Daru
- Lehrstuhl für Theoretische Chemie , Ruhr-Universität Bochum , 44780 Bochum , Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie , Ruhr-Universität Bochum , 44780 Bochum , Germany
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Zhuang D, Riera M, Schenter GK, Fulton JL, Paesani F. Many-Body Effects Determine the Local Hydration Structure of Cs + in Solution. J Phys Chem Lett 2019; 10:406-412. [PMID: 30629438 DOI: 10.1021/acs.jpclett.8b03829] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A systematic analysis of the hydration structure of Cs+ ions in solution is derived from simulations carried out using a series of molecular models built upon a hierarchy of approximate representations of many-body effects in ion-water interactions. It is found that a pairwise-additive model, commonly used in biomolecular simulations, provides poor agreement with experimental X-ray spectra, indicating an incorrect description of the underlying hydration structure. Although the agreement with experiment improves in simulations with a polarizable model, the predicted hydration structure is found to lack the correct sequence of water shells. Progressive inclusion of explicit many-body effects in the representation of Cs+-water interactions as well as accounting for nuclear quantum effects is shown to be necessary for quantitatively reproducing the experimental X-ray spectra. Besides emphasizing the importance of many-body effects, these results suggest that molecular models rigorously derived from many-body expansions hold promise for realistic simulations of aqueous solutions.
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Affiliation(s)
- Debbie Zhuang
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Marc Riera
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Gregory K Schenter
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - John L Fulton
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Francesco Paesani
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
- Materials Science and Engineering , University of California, San Diego , La Jolla , California 92093 , United States
- San Diego Supercomputer Center , University of California, San Diego , La Jolla , California 92093 , United States
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Balasubramanian K. Nuclear spin species, spin statistical weights and rovibronic tunnelling splittings of non-rigid water hexamer. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1171919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Venuti V, Rossi B, Crupi V, D'Amico F, Gessini A, Majolino D, Masciovecchio C, Stancanelli R, Ventura CA. Solute-Solvent Interactions in Aqueous Solutions of Sulfobutyl Ether-β-cyclodextrin As Probed by UV-Raman and FTIR-ATR Analysis. J Phys Chem B 2016; 120:3746-53. [PMID: 27043008 DOI: 10.1021/acs.jpcb.6b02261] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A vibrational study by means of UV-Raman and FTIR-ATR measurements has been performed on sulfobutyl ether β-cyclodextrin (SBE-β-CD)-water solutions, as a function of concentration and temperature, with the aim to provide a molecular-scale explanation of the enhanced performances as carrier agent exhibited by this modified macrocycle with respect to natural cyclodextrin. The attention has been mainly paid to the modifications induced on the vibrational band assigned to the O-H stretching intramolecular mode, in turn related to the dynamical rearrangement occurring in the hydrogen bonding (HB) network of water molecules. The results of our measurements clearly showed a characteristic "structure-breaker" effect on the tetrahedral HB arrangements induced on water molecules by increasing of both temperature and solute concentration, allowing us to also extract thermodynamic parameters. These results could be a key step for a clearer understanding of the connection between the dynamical properties of hydration water and the complexing ability of this cyclodextrin derivative.
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Affiliation(s)
- Valentina Venuti
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Barbara Rossi
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy.,Dipartimento di Fisica, Università degli Studi di Trento , via Sommarive 14, I-38123 Povo, Trento, Italy
| | - Vincenza Crupi
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Francesco D'Amico
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy
| | - Alessandro Gessini
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy
| | - Domenico Majolino
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Claudio Masciovecchio
- Dipartimento di Fisica, Università degli Studi di Trento , via Sommarive 14, I-38123 Povo, Trento, Italy
| | - Rosanna Stancanelli
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Cinzia Anna Ventura
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
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Rossi B, Venuti V, D'Amico F, Gessini A, Mele A, Punta C, Melone L, Crupi V, Majolino D, Trotta F, Masciovecchio C. Toward an understanding of the thermosensitive behaviour of pH-responsive hydrogels based on cyclodextrins. SOFT MATTER 2015; 11:5862-5871. [PMID: 26107102 DOI: 10.1039/c5sm01093d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The molecular mechanism responsible for the thermosensitive behaviour exhibited by pH-responsive cyclodextrin-based hydrogels is explored here with the twofold aim of clarifying some basic aspects of H-bond interactions in hydrogel phases and contributing to a future engineering of cyclodextrin hydrogels for targeted delivery and release of bioactive agents. The degree of H-bond association of water molecules entrapped in the gel network and the extent of intermolecular interactions involving the hydrophobic/hydrophilic moieties of the polymer matrix are probed by UV Raman and IR experiments, in order to address the question of how these different and complementary aspects combine to determine the pH-dependent thermal activation exhibited by these hydrogels. Complementary vibrational spectroscopies are conveniently employed in this study with the aim of safely disentangling the spectral response arising from the two main components of the hydrogel systems, i.e. the polymer matrix and water solvent. The experimental evidence suggests that the dominant effects in the mechanism of solvation of cyclodextrin-based hydrogels are due to the changes occurring, upon increasing of temperature, in the hydrophobicity character of specific chemical moieties of the polymer, as triggered by pH variations. The achievements of this work corroborate the potentiality of the UV Raman scattering technique, in combination with more conventional IR experiments, to provide a "molecular view" of complex macroscopic phenomena exhibited in hydrogel phases.
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Affiliation(s)
- Barbara Rossi
- Elettra-Sincrotrone Trieste, Strada Statale 14 km 163.5, Area Science Park, 34149 Trieste, Italy.
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9
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Mallory JD, Brown SE, Mandelshtam VA. Assessing the Performance of the Diffusion Monte Carlo Method As Applied to the Water Monomer, Dimer, and Hexamer. J Phys Chem A 2015; 119:6504-15. [PMID: 26001418 DOI: 10.1021/acs.jpca.5b02511] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The diffusion Monte Carlo (DMC) method is applied to the water monomer, dimer, and hexamer using q-TIP4P/F, one of the most simple empirical water models with flexible monomers. The bias in the time step (Δτ) and population size (Nw) is investigated. For the binding energies, the bias in Δτ cancels nearly completely, whereas a noticeable bias in Nw remains. However, for the isotope shift (e.g, in the dimer binding energies between (H2O)2 and (D2O)2), the systematic errors in Nw do cancel. Consequently, very accurate results for the latter (within ∼0.01 kcal/mol) are obtained with moderate numerical effort (Nw ∼ 10(3)). For the water hexamer and its (D2O)6 isotopomer, the DMC results as a function of Nw are examined for the cage and prism isomers. For a given isomer, the issue of the walker population leaking out of the corresponding basin of attraction is addressed by using appropriate geometric constraints. The population size bias for the hexamer is more severe, and to maintain accuracy similar to that of the dimer, Nw must be increased by ∼2 orders of magnitude. Fortunately, when the energy difference between the cage and prism is taken, the biases cancel, thereby reducing the systematic errors to within ∼0.01 kcal/mol when using a population of Nw = 4.8 × 10(5) walkers. Consequently, a very accurate result for the isotope shift is also obtained. Notably, both the quantum and isotope effects for the prism-cage energy difference are small.
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Affiliation(s)
- Joel D Mallory
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Sandra E Brown
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Vladimir A Mandelshtam
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
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Rossi B, Venuti V, Mele A, Punta C, Melone L, Crupi V, Majolino D, Trotta F, D’Amico F, Gessini A, Masciovecchio C. Probing the molecular connectivity of water confined in polymer hydrogels. J Chem Phys 2015; 142:014901. [DOI: 10.1063/1.4904946] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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11
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Jackson NE, Chen LX, Ratner MA. Solubility of Nonelectrolytes: A First-Principles Computational Approach. J Phys Chem B 2014; 118:5194-202. [DOI: 10.1021/jp5024197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Nicholas E. Jackson
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Lin X. Chen
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Mark A. Ratner
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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Crupi V, Majolino D, Mele A, Melone L, Punta C, Rossi B, Toraldo F, Trotta F, Venuti V. Direct evidence of gel-sol transition in cyclodextrin-based hydrogels as revealed by FTIR-ATR spectroscopy. SOFT MATTER 2014; 10:2320-2326. [PMID: 24652067 DOI: 10.1039/c3sm52354c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The phase transition from gel to liquid suspension in cyclodextrin (CD)-based hydrogels is in depth monitored by using Fourier transform infrared spectroscopy in attenuated total reflectance geometry. Cyclodextrin nanosponges (CDNS) synthesized by polymerization of CD with the cross-linking agent ethylenediaminetetraacetic dianhydride at different cross-linking agent/CD molar ratios have been left to evolve from gel phase into liquid suspension upon gradual increase of the hydration level. Measurements of the changes occurring in the vibrational dynamics of the system during this transition provide direct evidence of the gel-sol progress of the CNDS hydrogel, by accounting for the connectivity pattern of water molecules concurring to the gelation process. The experimental results clearly indicate that the increase of the hydration level is accompanied by the corresponding increase of the population of H2O molecules engaged in high-connectivity hydrogen-bond networks. The water tetrahedral arrangement is thus dominant above a characteristic cross-over hydration level, experimentally determined for all the investigated samples. The observation of this characteristic cross-over point for the CDNS hydrogel and its correlation with other parameters of the system (e.g. the absorption ability of CDNS and elasticity of the polymer matrix) is, once again, modulated by the cross-linking agent/CD molar ratio. The latter seems indeed to play a key role in defining the nano- and microscopic properties of nanosponge hydrogels.
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Affiliation(s)
- Vincenza Crupi
- Dipartimento di Fisica e di Scienze della Terra, Università di Messina, Viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy.
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14
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Crupi V, Fontana A, Majolino D, Mele A, Melone L, Punta C, Rossi B, Rossi F, Trotta F, Venuti V. Hydrogen-bond dynamics of water confined in cyclodextrin nanosponges hydrogel. J INCL PHENOM MACRO 2014. [DOI: 10.1007/s10847-014-0387-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Affiliation(s)
- Branko Ruscic
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States, and Computation Institute, University of Chicago, Chicago, Illinois 60637, United
States
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Jones A, Cipcigan F, Sokhan VP, Crain J, Martyna GJ. Electronically coarse-grained model for water. PHYSICAL REVIEW LETTERS 2013; 110:227801. [PMID: 23767748 DOI: 10.1103/physrevlett.110.227801] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Indexed: 06/02/2023]
Abstract
We introduce an electronically coarse-grained description of water representing all long range, many-body electronic responses via an embedded quantum oscillator. Leading-order response coefficients and gas phase electrostatic moments are exactly reproduced. Molecular dynamics, using electronic path integral sampling, shows that this framework is sufficient for a realistic liquid to emerge naturally with transferability extending further to nonambient state points and to the free water surface. The model allows the strength of many-body dispersion and polarization to be adjusted independently and these are found to have significant effects on the condensed phase.
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Affiliation(s)
- A Jones
- School of Physics and Astronomy, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
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Akin-Ojo O, Szalewicz K. How well can polarization models of pairwise nonadditive forces describe liquid water? J Chem Phys 2013; 138:024316. [DOI: 10.1063/1.4773821] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Omololu Akin-Ojo
- Theoretical Physics Department, African University of Science and Technology, Km 10 Airport Road, Galadimawa, Abuja, Nigeria
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Rocher-Casterline BE, Ch'ng LC, Mollner AK, Reisler H. Communication: determination of the bond dissociation energy (D0) of the water dimer, (H2O)2, by velocity map imaging. J Chem Phys 2012; 134:211101. [PMID: 21663337 DOI: 10.1063/1.3598339] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The bond dissociation energy (D(0)) of the water dimer is determined by using state-to-state vibrational predissociation measurements following excitation of the bound OH stretch fundamental of the donor unit of the dimer. Velocity map imaging and resonance-enhanced multiphoton ionization (REMPI) are used to determine pair-correlated product velocity and translational energy distributions. H(2)O fragments are detected in the ground vibrational (000) and the first excited bending (010) states by 2 + 1 REMPI via the C̃ (1)B(1) (000) ← X̃ (1)A(1) (000 and 010) transitions. The fragments' velocity and center-of-mass translational energy distributions are determined from images of selected rovibrational levels of H(2)O. An accurate value for D(0) is obtained by fitting both the structure in the images and the maximum velocity of the fragments. This value, D(0) = 1105 ± 10 cm(-1) (13.2 ± 0.12 kJ/mol), is in excellent agreement with the recent theoretical value of D(0) = 1103 ± 4 cm(-1) (13.2 ± 0.05 kJ∕mol) suggested as a benchmark by Shank et al. [J. Chem. Phys. 130, 144314 (2009)].
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Shevkunov SV. Charge separation in Na+Cl-(H2O) n clusters in water vapors. 1. Intermolecular interactions. COLLOID JOURNAL 2010. [DOI: 10.1134/s1061933x10010114] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Szalewicz K, Leforestier C, van der Avoird A. Towards the complete understanding of water by a first-principles computational approach. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.029] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Schmidt DA, Scipioni R, Boero M. Water Solvation Properties: An Experimental and Theoretical Investigation of Salt Solutions at Finite Dilution. J Phys Chem A 2009; 113:7725-9. [DOI: 10.1021/jp9016932] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Diedrich A. Schmidt
- International Center for Young Scientists, National Institute for Materials Science, Tsukuba, 305-0044, Japan, Department of Physical Chemistry II, Ruhr-University Bochum, 44780 Bochum, Germany, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-UDS, 23 rue du Loess, BP 43, F-67034 Strasbourg, France, and CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Roberto Scipioni
- International Center for Young Scientists, National Institute for Materials Science, Tsukuba, 305-0044, Japan, Department of Physical Chemistry II, Ruhr-University Bochum, 44780 Bochum, Germany, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-UDS, 23 rue du Loess, BP 43, F-67034 Strasbourg, France, and CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Mauro Boero
- International Center for Young Scientists, National Institute for Materials Science, Tsukuba, 305-0044, Japan, Department of Physical Chemistry II, Ruhr-University Bochum, 44780 Bochum, Germany, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-UDS, 23 rue du Loess, BP 43, F-67034 Strasbourg, France, and CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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25
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Scipioni R, Schmidt DA, Boero M. A first principles investigation of water dipole moment in a defective continuous hydrogen bond network. J Chem Phys 2009; 130:024502. [PMID: 19154033 DOI: 10.1063/1.3054197] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
First principles molecular dynamics simulations of an aqueous solution salt system at finite concentration containing both Na(+) and Cl(-) ions show that a change in the distribution of the molecular dipole moment of H(2)O monomers appears when ions are present in solution. Simulations suggest a lowering of the dipole moments of the water molecules in the solvation shells of Na(+) and Cl(-) as compared to the pure water case, while the dipoles of the rest of the molecules are hardly affected. However, finer analysis in terms of the Wannier centers distribution suggests a change in the electronic structure of the water molecules even in the bulk. Also a change of the H-bond network arrangement was found and correlation between dipole and MOH parameter evidences such subtle effects, suggesting a lowering of tetrahedral order in salty solutions. All these changes can be related to observable quantities such as the infrared spectra thus allowing for a rationalization of the experimental outcome on neutral aqueous solutions.
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Affiliation(s)
- Roberto Scipioni
- International Center for Materials Nanoarchitectonics, 1-1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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26
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Bates DM, Tschumper GS. CCSD(T) Complete Basis Set Limit Relative Energies for Low-Lying Water Hexamer Structures. J Phys Chem A 2009; 113:3555-9. [DOI: 10.1021/jp8105919] [Citation(s) in RCA: 176] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Desiree M. Bates
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848
| | - Gregory S. Tschumper
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848
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27
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Takeuchi H. Development of an Efficient Geometry Optimization Method for Water Clusters. J Chem Inf Model 2008; 48:2226-33. [DOI: 10.1021/ci800238w] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Hiroshi Takeuchi
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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28
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Schmidt DA, Miki K. Defective Continuous Hydrogen-Bond Networks: An Alternative Interpretation of IR Spectroscopy. Chemphyschem 2008; 9:1914-9. [DOI: 10.1002/cphc.200800236] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Bukowski R, Szalewicz K, Groenenboom GC, van der Avoird A. Polarizable interaction potential for water from coupled cluster calculations. I. Analysis of dimer potential energy surface. J Chem Phys 2008; 128:094313. [DOI: 10.1063/1.2832746] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Rai D, Kulkarni AD, Gejji SP, Pathak RK. Water clusters (H2O)n, n=6–8, in external electric fields. J Chem Phys 2008; 128:034310. [DOI: 10.1063/1.2816565] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Schmidt DA, Miki K. Structural Correlations in Liquid Water: A New Interpretation of IR Spectroscopy. J Phys Chem A 2007; 111:10119-22. [PMID: 17880191 DOI: 10.1021/jp074737n] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a new and alternative interpretation of the structure of the IR vibrational mode (nu(OH) band) of pure water. The re-interpretation is based on the influence of the cooperative hydrogen bonding arising from a network of hydrogen bonds in the liquid. The nu(OH) band has six components that are dominated by differences in their O-H bond lengths but deviate from thermodynamically average values due to interactions with the hydrogen bond network. The physical origin of the structure in the nu(OH) band is directly related to the O-H bond length, and variations in this bond length are caused by the influence of the surrounding hydrogen-bonded network of water molecules.
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Affiliation(s)
- Diedrich A Schmidt
- International Center for Young Scientists, National Institute for Materials Science, Tsukuba 305-0044, Japan.
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32
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Dahlke EE, Truhlar DG. Assessment of the pairwise additive approximation and evaluation of many-body terms for water clusters. J Phys Chem B 2007; 110:10595-601. [PMID: 16771303 DOI: 10.1021/jp061039e] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have tested the ability of four commonly used density functionals (three of which are semilocal and one of which is nonlocal) to outperform accurate pairwise additive approximations in the prediction of binding energies for a series of water clusters ranging in size from dimer to pentamer. Comparison to results obtained with the Weizmann-1 (W1) level of wave function theory shows that while all density functionals are capable of outperforming the accurate pairwise data, the choice of basis set used is crucial to the performance of the method, and if a poor choice of basis set is made the errors obtained with density functional theory (DFT) can be larger than those obtained with the simple pairwise approximation. We have also compared the binding energies and many-body terms determined with DFT to those obtained with W1, and have found that all semilocal functionals have significant errors in the many-body components of the full interactions energy. Despite this limitation, however, we have found that, of the four functionals tested, PBE1W/MG3S is the most accurate for predicting the binding energies of the clusters.
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33
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Harker HA, Keutsch FN, Leforestier C, Scribano Y, Han JX, Saykally RJ. Refinements in the description of excited VRT states of the water dimer. Mol Phys 2007. [DOI: 10.1080/00268970601153373] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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34
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Harker HA, Keutsch FN, Leforestier C, Scribano Y, Han JX, Saykally RJ. Toward a precise determination of the acceptor switching splitting in the water dimer. Mol Phys 2007. [DOI: 10.1080/00268970601063812] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Devereux M, Popelier PLA. The Effects of Hydrogen-Bonding Environment on the Polarization and Electronic Properties of Water Molecules. J Phys Chem A 2007; 111:1536-44. [PMID: 17279739 DOI: 10.1021/jp067922u] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Adequate representation of the interactions that take place between water molecules has long been a goal of force field design. A full understanding of how the molecular charge distribution of water is altered by adjacent water molecules and by the hydrogen-bonding environment is a vital step toward achieving this task. For this purpose we generated ab initio electron densities of pure water clusters and hydrated serine and tyrosine. Quantum chemical topology enabled the study of a well-defined water molecule inside these clusters, by means of its volume, energy, and multipole moments. Intra- and intermolecular charge transfer was monitored and related to the polarization of water in hydrogen-bonded networks. Our analysis affords a way to define different types of water molecules in clusters.
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Affiliation(s)
- M Devereux
- Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, Great Britain
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36
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Abstract
Experiments are reviewed in which key problems in chemical dynamics are probed by experiments based on photodetachment and/or photoexcitation of negative ions. Examples include transition state spectroscopy of biomolecular reactions, spectroscopy of open shell van der Waals complexes, photodissociation of free radicals, and time-resolved dynamics in clusters. The experimental methods used in these investigations are described along with representative systems that have been studied.
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Affiliation(s)
- Daniel M Neumark
- Department of Chemistry,University of California, Berkeley, California 94720, USA.
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37
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Terahertz vibration–rotation-tunneling (VRT) spectroscopy of the d6-water trimer: Complete characterization of the 2.94THz torsional band (kn=±21←00). Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.03.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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38
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Mundy CJ, Kuo IFW. First-Principles Approaches to the Structure and Reactivity of Atmospherically Relevant Aqueous Interfaces. Chem Rev 2006; 106:1282-304. [PMID: 16608181 DOI: 10.1021/cr040375t] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher J Mundy
- Computational Chemistry and Chemical Biology, Chemistry and Materials Science, Lawrence Livermore National Laboratory, PO Box 808, Livermore, CA 94551, USA.
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39
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Affiliation(s)
- Pavel Jungwirth
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Center for Biomolecules and Complex Molecular Systems, Flemingovo nam. 2, 16610 Prague 6, Czech Republic.
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40
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Huang X, Braams BJ, Bowman JM. Ab Initio Potential Energy and Dipole Moment Surfaces of (H2O)2. J Phys Chem A 2005; 110:445-51. [PMID: 16405316 DOI: 10.1021/jp053583d] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A full-dimensional ab initio potential energy surface (PES) and dipole moment surface (DMS) are reported for the water dimer, (H2O)2. The CCSD(T)-PES is a very precise fit to 19,805 ab initio energies obtained with the coupled-cluster (CCSD(T)) method, using an aug-cc-pVTZ basis. The standard counterpoise correction was applied to approximately eliminate basis set superposition errors. The fit is based on an approach that incorporates the permutational symmetry of identical atoms [Huang, X.; Braams, B.; Bowman, J. M. J. Chem.Phys. 2005, 122, 044308]. The DMS is a fit to the dipole moment obtained with Møller-Plesset (MP2) theory, using an aug-cc-pVTZ basis. The PES has an RMS fitting error of 31 cm(-1) for energies below 20,000 cm(-1), relative to the global minimum. This surface can describe various internal floppy motions, including various monomer inversions, and isomerization pathways. Ten characteristic stationary points have been located on the surface, four of which are transition structures and the rest are higher order saddle points. Their geometrical and vibrational properties are presented and compared with available previous theoretical work. The CCSD(T)-PES and MP2-DMS dissociate correctly (and symmetrically) to two H2O monomers, with D(e) = 1665.7 cm(-1) (19.93 kJ/mol). Accurate quantum calculations of the zero-point energy of the dimer (using diffusion Monte Carlo) and the monomers (using a vibrational configuration interaction approach) are reported, and these together with D(e) give a value of D0 of 1042 cm(-1) (12.44 kJ/mol). A best estimated value is 1130 cm(-1) (13.5 kJ/mol).
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Affiliation(s)
- Xinchuan Huang
- Cherry L. Emerson Center of Scientific Computation, Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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41
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Tůma L, Jeníček D, Jungwirth P. Propensity of heavier halides for the water/vapor interface revisited using the Amoeba force field. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Goldman N, Leforestier C, Saykally RJ. A 'first principles' potential energy surface for liquid water from VRT spectroscopy of water clusters. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2005; 363:493-508. [PMID: 15664895 DOI: 10.1098/rsta.2004.1504] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present results of gas phase cluster and liquid water simulations from the recently determined VRT(ASP-W)III water dimer potential energy surface (the third fitting of the Anisotropic Site Potential with Woermer dispersion to vibration-rotation-tunnelling data). VRT(ASP-W)III is shown to not only be a model of high 'spectroscopic' accuracy for the water dimer, but also makes accurate predictions of vibrational ground-state properties for clusters up through the hexamer. Results of ambient liquid water simulations from VRT(ASP-W)III are compared with those from ab initio molecular dynamics, other potentials of 'spectroscopic' accuracy and with experiment. The results herein represent the first time to the authors' knowledge that a 'spectroscopic' potential surface is able to correctly model condensed phase properties of water.
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Affiliation(s)
- Nir Goldman
- Lawrence Livermore National Laboratory, Chemistry and Materials Science Directorate, L-268, Livermore, CA 94551, USA
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43
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Paik DH, Lee IR, Yang DS, Baskin JS, Zewail AH. Electrons in Finite-Sized Water Cavities: Hydration Dynamics Observed in Real Time. Science 2004; 306:672-5. [PMID: 15375221 DOI: 10.1126/science.1102827] [Citation(s) in RCA: 165] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
We directly observed the hydration dynamics of an excess electron in the finite-sized water clusters of (H2O)n- with n = 15, 20, 25, 30, and 35. We initiated the solvent motion by exciting the hydrated electron in the cluster. By resolving the binding energy of the excess electron in real time with femtosecond resolution, we captured the ultrafast dynamics of the electron in the presolvated ("wet") and hydrated states and obtained, as a function of cluster size, the subsequent relaxation times. The solvation time (300 femtoseconds) after the internal conversion [140 femtoseconds for (H2O)35-] was similar to that of bulk water, indicating the dominant role of the local water structure in the dynamics of hydration. In contrast, the relaxation in other nuclear coordinates was on a much longer time scale (2 to 10 picoseconds) and depended critically on cluster size.
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Affiliation(s)
- D Hern Paik
- Arthur Amos Noyes Laboratory of Chemical Physics, Laboratory for Molecular Sciences, California Institute of Technology, Pasadena, CA 91125, USA
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44
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Balasubramanian K. Nonrigid Group Theory, Tunneling Splittings, and Nuclear Spin Statistics of Water Pentamer: (H2O)5. J Phys Chem A 2004. [DOI: 10.1021/jp049955k] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. Balasubramanian
- Center for Image Processing and Integrated Computing, University of California Davis, Livermore, California 94550, University of California, Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, and Glenn T Seaborg Center, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
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45
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Anderson JA, Crager K, Fedoroff L, Tschumper GS. Anchoring the potential energy surface of the cyclic water trimer. J Chem Phys 2004; 121:11023-9. [PMID: 15634052 DOI: 10.1063/1.1799931] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Six cyclic stationary points on the water trimer potential energy surface have been fully optimized at the MP2 level with the aug-cc-pVQZ basis set. In agreement with previous work, harmonic vibrational frequencies indicate that two structures are minima, three are transition states connecting minima on the surface while the remaining stationary point is a higher-order saddle point. The 1- and n-particle limits of the electronic energies of each of these six structures were estimated by systematically varying both the basis sets and theoretical methods. The former limit was approached with the cc-pVXZ and aug-cc-pVXZ families of basis sets (X=2-7) while MP2, CCSD(T), and BD(TQ) calculations helped examine the latter. Core correlation effects have also been assessed at the MP2 level with the cc-pCVXZ series of basis sets (X=2-5). These data have been combined to provide highly accurate relative energies and dissociation energies for these stationary points.
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Affiliation(s)
- Julie A Anderson
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677-1848, USA
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