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Hao H, Ruiz Pestana L, Qian J, Liu M, Xu Q, Head‐Gordon T. Chemical transformations and transport phenomena at interfaces. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2022. [DOI: 10.1002/wcms.1639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hongxia Hao
- Kenneth S. Pitzer Theory Center and Department of Chemistry University of California Berkeley California USA
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Luis Ruiz Pestana
- Department of Civil and Architectural Engineering University of Miami Coral Gables Florida USA
| | - Jin Qian
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Meili Liu
- Department of Civil and Architectural Engineering University of Miami Coral Gables Florida USA
| | - Qiang Xu
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Teresa Head‐Gordon
- Kenneth S. Pitzer Theory Center and Department of Chemistry University of California Berkeley California USA
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
- Department of Bioengineering and Chemical and Biomolecular Engineering University of California Berkeley California USA
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2
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Muñoz S, Alvarado-Soto L, Gaete J, Morales-Verdejo C, Ramírez-Tagle R. Cluster of Hexamolybdenum [Mo 6Cl 14] 2- for Sensing Nitroaromatic Compounds. ACS OMEGA 2022; 7:19152-19157. [PMID: 35721901 PMCID: PMC9201897 DOI: 10.1021/acsomega.1c07202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
This contribution describes a novel method for the detection of trace amounts of trinitrotoluene (TNT) using a cluster of hexamolybdenum with general formula [Mo6Cl14]2-. The molybdenum cluster was characterized by UV-visible, FT-IR, and fluorescence techniques, and the synthesis was efficient and reproducible. The evaluation of the molybdenum cluster by TNT detection was perfomed by fluoresecent measurements, and the results were interpreted by the Stern-Volmer equation, obtaining K SV values of 2.9 × 105 and 1.6 × 104 M-1 in different concentration ranges. Further, the results suggest that at TNT concentrations higher than 4 × 10-5 mM (0.01 mg L-1) it is possible to measure the quenching of the cluster fluorescence. The DFT calculations indicate that the contribution of the TNT in the active lowest unoccupied molecular orbitals that are involved in the higher intensity transitions in the complex cluster-TNT are significant. This situation differs from all the luminescent [M6X8L6]2- clusters (M = Mo; X = facial bridging ligand, and L = labile axial ligands), where most of the closely spaced excited states are located in the {M6X8} q+ core. Thus, the TNT switches off the cluster luminescence. The approach using a [Mo6Cl14]2--based fluorescence sensor has the potential to be a sensing technology for the detection of nitroaromatic explosives.
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Affiliation(s)
- Salomé Muñoz
- Centro
Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo OHiggins, General Gana 1702, Santiago, Chile
| | - Leonor Alvarado-Soto
- Dirección
de Investigación y Postgrado, Universidad
de Aconcagua, Pedro
de Villagra 2265, Vitacura
| | - José Gaete
- Centro
Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo OHiggins, General Gana 1702, Santiago, Chile
| | - Cesar Morales-Verdejo
- Centro
Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo OHiggins, General Gana 1702, Santiago, Chile
| | - Rodrigo Ramírez-Tagle
- Dirección
de Investigación y Postgrado, Universidad
de Aconcagua, Pedro
de Villagra 2265, Vitacura
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3
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Barwa E, Pascher TF, Ončák M, Linde C, Beyer MK. Aktivierung von Kohlenstoffdioxid an Metallzentren: Entwicklung des Ladungstransfers von Mg
.+
auf CO
2
in [MgCO
2
(H
2
O)
n
]
.+
,
n=
0–8. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Erik Barwa
- Institut für Ionenphysik und Angewandte PhysikUniversität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Tobias F. Pascher
- Institut für Ionenphysik und Angewandte PhysikUniversität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte PhysikUniversität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Christian Linde
- Institut für Ionenphysik und Angewandte PhysikUniversität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Martin K. Beyer
- Institut für Ionenphysik und Angewandte PhysikUniversität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
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4
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Barwa E, Pascher TF, Ončák M, van der Linde C, Beyer MK. Carbon Dioxide Activation at Metal Centers: Evolution of Charge Transfer from Mg .+ to CO 2 in [MgCO 2 (H 2 O) n ] .+ , n=0-8. Angew Chem Int Ed Engl 2020; 59:7467-7471. [PMID: 32100953 PMCID: PMC7217156 DOI: 10.1002/anie.202001292] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Indexed: 11/06/2022]
Abstract
We investigate activation of carbon dioxide by singly charged hydrated magnesium cations Mg .+(H2O)n, through infrared multiple photon dissociation (IRMPD) spectroscopy combined with quantum chemical calculations. The spectra of [MgCO2(H2O)n].+ in the 1250–4000 cm−1 region show a sharp transition from n=2 to n=3 for the position of the CO2 antisymmetric stretching mode. This is evidence for the activation of CO2 via charge transfer from Mg .+ to CO2 for n≥3, while smaller clusters feature linear CO2 coordinated end‐on to the metal center. Starting with n=5, we see a further conformational change, with CO2.− coordination to Mg2+ gradually shifting from bidentate to monodentate, consistent with preferential hexa‐coordination of Mg2+. Our results reveal in detail how hydration promotes CO2 activation by charge transfer at metal centers.
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Affiliation(s)
- Erik Barwa
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - Tobias F Pascher
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - Christian van der Linde
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - Martin K Beyer
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
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5
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Carnegie PD, Marks JH, Brathwaite AD, Ward TB, Duncan MA. Microsolvation in V +(H 2O) n Clusters Studied with Selected-Ion Infrared Spectroscopy. J Phys Chem A 2020; 124:1093-1103. [PMID: 31961153 DOI: 10.1021/acs.jpca.9b11275] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Gas-phase ion-molecule clusters of the form V+(H2O)n (n = 1-30) are produced by laser vaporization in a supersonic expansion. These ions are analyzed and mass-selected with a time-of-flight mass spectrometer and investigated with infrared laser photodissociation spectroscopy. The small clusters (n ≤ 7) are studied with argon tagging, while the larger clusters are studied via the elimination of water molecules. The vibrational spectra for the small clusters include only free O-H stretching vibrations, while larger clusters exhibit redshifted hydrogen bonding vibrations. The spectral patterns reveal that the coordination around V+ ions is completed with four water molecules. A symmetric square-planar structure forms for the n = 4 ion, and this becomes the core ion in larger structures. Clusters up to n = 8 have mostly two-dimensional structures, but hydrogen bonding networks evolve to three-dimensional structures in larger clusters. The free O-H vibration of acceptor-acceptor-donor (AAD)-coordinated surface molecules converges to a frequency near that of bulk water by the cluster size of n = 30. However, the splitting of this vibration for AAD- versus AD-coordinated molecules is still different compared to other singly charged or doubly charged cation-water clusters. This indicates that cation identity and charge-site location in the cluster can produce discernable spectral differences for clusters in this size range.
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Affiliation(s)
- Prosser D Carnegie
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - Joshua H Marks
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - Antonio D Brathwaite
- Department of Chemistry , Emory University , Atlanta , Georgia 30322 , United States
| | - Timothy B Ward
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - Michael A Duncan
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
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6
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Barwa E, Ončák M, Pascher TF, Herburger A, van der Linde C, Beyer MK. Infrared Multiple Photon Dissociation Spectroscopy of Hydrated Cobalt Anions Doped with Carbon Dioxide CoCO 2 (H 2 O) n - , n=1-10, in the C-O Stretch Region. Chemistry 2020; 26:1074-1081. [PMID: 31617628 PMCID: PMC7051846 DOI: 10.1002/chem.201904182] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 11/05/2022]
Abstract
We investigate anionic [Co,CO2 ,nH2 O]- clusters as model systems for the electrochemical activation of CO2 by infrared multiple photon dissociation (IRMPD) spectroscopy in the range of 1250-2234 cm-1 using an FT-ICR mass spectrometer. We show that both CO2 and H2 O are activated in a significant fraction of the [Co,CO2 ,H2 O]- clusters since it dissociates by CO loss, and the IR spectrum exhibits the characteristic C-O stretching frequency. About 25 % of the ion population can be dissociated by pumping the C-O stretching mode. With the help of quantum chemical calculations, we assign the structure of this ion as Co(CO)(OH)2 - . However, calculations find Co(HCOO)(OH)- as the global minimum, which is stable against IRMPD under the conditions of our experiment. Weak features around 1590-1730 cm-1 are most likely due to higher lying isomers of the composition Co(HOCO)(OH)- . Upon additional hydration, all species [Co,CO2 ,nH2 O]- , n≥2, undergo IRMPD through loss of H2 O molecules as a relatively weakly bound messenger. The main spectral features are the C-O stretching mode of the CO ligand around 1900 cm-1 , the water bending mode mixed with the antisymmetric C-O stretching mode of the HCOO- ligand around 1580-1730 cm-1 , and the symmetric C-O stretching mode of the HCOO- ligand around 1300 cm-1 . A weak feature above 2000 cm-1 is assigned to water combination bands. The spectral assignment clearly indicates the presence of at least two distinct isomers for n ≥2.
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Affiliation(s)
- Erik Barwa
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Tobias F. Pascher
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Andreas Herburger
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Christian van der Linde
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Martin K. Beyer
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
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7
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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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8
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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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9
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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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10
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Lengyel J, Ončák M, Herburger A, van der Linde C, Beyer MK. Infrared spectroscopy of O˙ - and OH - in water clusters: evidence for fast interconversion between O˙ - and OH˙OH . Phys Chem Chem Phys 2017; 19:25346-25351. [PMID: 28891582 PMCID: PMC7100789 DOI: 10.1039/c7cp04577h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We present infrared multiple photon dissociation (IRMPD) spectra of (H2O)nO˙- and (H2O)nOH- cluster ensembles for n[combining macron] ≈ 8 and 47 in the range of 2400-4000 cm-1. Both hydrated ions exhibit the same spectral features, in good agreement with theoretical calculations. Decomposition of the calculated spectra shows that bands originating from H2OO˙- and H2OOH- interactions span almost the whole spectral region of interest. Experimentally, evaporation of OH˙ is observed to a small extent, which requires interconversion of (H2O)nO˙- into (H2O)n-1OH˙OH-, with subsequent H2O evaporation preferred over OH˙ evaporation. The modeling shows that (H2O)nO˙- and (H2O)n-1OH˙OH- cannot be distinguished by IRMPD spectroscopy.
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Affiliation(s)
- Jozef Lengyel
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.
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11
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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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12
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Thaunay F, Ohanessian G, Clavaguéra C. Dynamics of ions in a water drop using the AMOEBA polarizable force field. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.01.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Chen Y, Okur HI, Liang C, Roke S. Orientational ordering of water in extended hydration shells of cations is ion-specific and is correlated directly with viscosity and hydration free energy. Phys Chem Chem Phys 2017; 19:24678-24688. [DOI: 10.1039/c7cp03395h] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Specific ion effects in aqueous solutions are investigated at the molecular, nanoscopic and macroscopic levels.
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Affiliation(s)
- Yixing Chen
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Halil I. Okur
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Chungwen Liang
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
| | - Sylvie Roke
- Laboratory for fundamental BioPhotonics (LBP)
- Institute of Bio-engineering (IBI), and Institute of Materials Science (IMX)
- School of Engineering (STI), and Lausanne Centre for Ultrafast Science (LACUS)
- École Polytechnique Fédérale de Lausanne (EPFL)
- Lausanne
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14
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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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15
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Xu S, Smith JET, Weber JM. Hydration of a Binding Site with Restricted Solvent Access: Solvatochromic Shift of the Electronic Spectrum of a Ruthenium Polypyridine Complex, One Molecule at a Time. J Phys Chem A 2016; 120:7650-7658. [PMID: 27627894 DOI: 10.1021/acs.jpca.6b07668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the electronic spectra of mass selected [(bpy)(tpy)Ru-OH2]2+·(H2O)n clusters (bpy = 2,2'-bipyridine, tpy =2,2':6'2″-terpyridine, n = 0-4) in the spectral region of their metal-to-ligand charge transfer bands. The spectra of the mono- and dihydrate clusters exhibit partially resolved individual electronic transitions. The water network forming at the aqua ligand leads to a rapid solvatochromic shift of the peak of the band envelope: addition of only four solvent water molecules can recover 78% of the solvatochromic shift in bulk solution. The sequential shift of the band shows a clear change in behavior with the closing of the first hydration shell. We compare our experimental data to density function theory (DFT) calculations for the ground and excited states.
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Affiliation(s)
- Shuang Xu
- JILA and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
| | - James E T Smith
- JILA and Department of Chemistry and Biochemistry, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
| | - J Mathias Weber
- JILA and Department of Chemistry and Biochemistry, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
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16
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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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17
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Chen Y, Okur HI, Gomopoulos N, Macias-Romero C, Cremer PS, Petersen PB, Tocci G, Wilkins DM, Liang C, Ceriotti M, Roke S. Electrolytes induce long-range orientational order and free energy changes in the H-bond network of bulk water. SCIENCE ADVANCES 2016; 2:e1501891. [PMID: 27152357 PMCID: PMC4846452 DOI: 10.1126/sciadv.1501891] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 03/06/2016] [Indexed: 05/05/2023]
Abstract
Electrolytes interact with water in many ways: changing dipole orientation, inducing charge transfer, and distorting the hydrogen-bond network in the bulk and at interfaces. Numerous experiments and computations have detected short-range perturbations that extend up to three hydration shells around individual ions. We report a multiscale investigation of the bulk and surface of aqueous electrolyte solutions that extends from the atomic scale (using atomistic modeling) to nanoscopic length scales (using bulk and interfacial femtosecond second harmonic measurements) to the macroscopic scale (using surface tension experiments). Electrolytes induce orientational order at concentrations starting at 10 μM that causes nonspecific changes in the surface tension of dilute electrolyte solutions. Aside from ion-dipole interactions, collective hydrogen-bond interactions are crucial and explain the observed difference of a factor of 6 between light water and heavy water.
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Affiliation(s)
- Yixing Chen
- Laboratory for fundamental BioPhotonics, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Halil I. Okur
- Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA
| | - Nikolaos Gomopoulos
- Laboratory for fundamental BioPhotonics, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Carlos Macias-Romero
- Laboratory for fundamental BioPhotonics, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Paul S. Cremer
- Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA
- Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA
| | - Poul B. Petersen
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Gabriele Tocci
- Laboratory for fundamental BioPhotonics, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Laboratory of Computational Science and Modeling, Institute of Materials Science and Engineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - David M. Wilkins
- Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK
| | - Chungwen Liang
- Laboratory of Computational Science and Modeling, Institute of Materials Science and Engineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Michele Ceriotti
- Laboratory of Computational Science and Modeling, Institute of Materials Science and Engineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sylvie Roke
- Laboratory for fundamental BioPhotonics, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Corresponding author. E-mail:
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18
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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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19
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Affiliation(s)
- A. Subha Mahadevi
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
| | - G. Narahari Sastry
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
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20
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Chakrabarty S, Williams ER. The effect of halide and iodate anions on the hydrogen-bonding network of water in aqueous nanodrops. Phys Chem Chem Phys 2016; 18:25483-25490. [DOI: 10.1039/c6cp05033f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydration of halide and iodate anions was investigated using electrospray ionization (ESI) mass spectrometry and infrared photodissociation (IRPD) spectroscopy.
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21
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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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22
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Cooper RJ, DiTucci MJ, Chang TM, Williams ER. Delayed Onset of Crystallinity in Ion-Containing Aqueous Nanodrops. J Am Chem Soc 2015; 138:96-9. [DOI: 10.1021/jacs.5b11880] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard J. Cooper
- Department of
Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew J. DiTucci
- Department of
Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Terrence M. Chang
- Department of
Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Evan R. Williams
- Department of
Chemistry, University of California, Berkeley, California 94720-1460, United States
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23
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Cooper RJ, Heiles S, Williams ER. Effects of electronic structure on the hydration of PbNO3(+) and SrNO3(+) ion pairs. Phys Chem Chem Phys 2015; 17:15963-75. [PMID: 26028325 DOI: 10.1039/c5cp01859e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydration of PbNO3(+) and SrNO3(+) with up to 30 water molecules was investigated with infrared photodissociation (IRPD) spectroscopy and with theory. These ions are the same size, yet the IRPD spectra of these ion pairs for n = 2-8 are significantly different. Bands in the bonded O-H region (∼3000-3550 cm(-1)) indicate that the onset of a second hydration shell begins at n = 5 for PbNO3(+) and n = 6 for SrNO3(+). Spectra for [PbNO3](+)(H2O)2-5 and [SrNO3](+)(H2O)3-6 indicate that the structures of clusters with Pb(ii) are hemidirected with a void in the coordinate sphere. A natural bond orbital analysis of [PbNO3](+)(H2O)5 indicates that the anisotropic solvation of the ion is due to a region of asymmetric electron density on Pb(ii) that can be explained by charge transfer from the nitrate and water ligands into unoccupied p-orbitals on Pb(ii). There are differences in the IRPD spectra of PbNO3(+) and SrNO3(+) with up to 25 water molecules attached. IR intensity in the bonded O-H region is blue-shifted by ∼50 cm(-1) in nanodrops containing SrNO3(+) compared to those containing PbNO3(+), indicative of a greater perturbation of the water H-bond network by strontium. The free O-H stretches of surface water molecules in nanodrops containing 10, 15, 20, and 25 water molecules are red-shifted by ∼3-8 cm(-1) for PbNO3(+) compared to those for SrNO3(+), consistent with more charge transfer between water molecules and Pb(ii). These results demonstrate that the different electronic structure of these ions significantly influences how they are solvated.
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Affiliation(s)
- Richard J Cooper
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
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24
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Heiles S, Cooper RJ, DiTucci MJ, Williams ER. Hydration of guanidinium depends on its local environment. Chem Sci 2015; 6:3420-3429. [PMID: 28706704 PMCID: PMC5490459 DOI: 10.1039/c5sc00618j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 04/14/2015] [Indexed: 01/10/2023] Open
Abstract
Hydration of gaseous guanidinium (Gdm+) with up to 100 water molecules attached was investigated using infrared photodissociation spectroscopy in the hydrogen stretch region between 2900 and 3800 cm-1. Comparisons to IR spectra of low-energy computed structures indicate that at small cluster size, water interacts strongly with Gdm+ with three inner shell water molecules each accepting two hydrogen bonds from adjacent NH2 groups in Gdm+. Comparisons to results for tetramethylammonium (TMA+) and Na+ enable structural information for larger clusters to be obtained. The similarity in the bonded OH region for Gdm(H2O)20+vs. Gdm(H2O)100+ and the similarity in the bonded OH regions between Gdm+ and TMA+ but not Na+ for clusters with <50 water molecules indicate that Gdm+ does not significantly affect the hydrogen-bonding network of water molecules at large size. These results indicate that the hydration around Gdm+ changes for clusters with more than about eight water molecules to one in which inner shell water molecules only accept a single H-bond from Gdm+. More effective H-bonding drives this change in inner-shell water molecule binding to other water molecules. These results show that hydration of Gdm+ depends on its local environment, and that Gdm+ will interact with water even more strongly in an environment where water is partially excluded, such as the surface of a protein. This enhanced hydration in a limited solvation environment may provide new insights into the effectiveness of Gdm+ as a protein denaturant.
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Affiliation(s)
- Sven Heiles
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94720 , USA .
| | - Richard J Cooper
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94720 , USA .
| | - Matthew J DiTucci
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94720 , USA .
| | - Evan R Williams
- Department of Chemistry , University of California , B42 Hildebrand Hall , Berkeley , CA 94720 , USA .
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25
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Do TD, Bowers MT. Diphenylalanine self assembly: novel ion mobility methods showing the essential role of water. Anal Chem 2015; 87:4245-52. [PMID: 25785477 DOI: 10.1021/ac5046774] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The mechanism and driving forces behind the formation of diphenylalanine (FF) nanotubes have attracted much attention in the past decades. The hollow structure of the nanotubes suggests a role for water during the self-assembly process. Here, we use novel ion-mobility mass spectrometry methods to probe the early oligomers formed by diphenylalanine peptides. Interestingly, water-bound oligomers are observed in nano-electrospray ionization (ESI) mass spectra in the absence of bulk solvent. In addition, ligated water clusters transit the ion mobility cell but (often) dissociate before detection. These water molecules are shown to be essential for the formation of diphenylalanine oligomers larger than the dimer. The ligated water molecules exist in the solvent free environment either as neutral water or as protonated water clusters, depending on the composition of solvent from which they are sprayed. Water adduction helps stabilize conformers that are otherwise energetically unstable ultimately leading to the assembly of FF nanotubes.
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Affiliation(s)
- Thanh D Do
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Michael T Bowers
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
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26
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Ke H, van der Linde C, Lisy JM. Insights into the Structures of the Gas-Phase Hydrated Cations M+(H2O)nAr (M = Li, Na, K, Rb, and Cs; n = 3–5) Using Infrared Photodissociation Spectroscopy and Thermodynamic Analysis. J Phys Chem A 2015; 119:2037-51. [DOI: 10.1021/jp509694h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Haochen Ke
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Christian van der Linde
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - James M. Lisy
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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27
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DiTucci MJ, Heiles S, Williams ER. Role of Water in Stabilizing Ferricyanide Trianion and Ion-Induced Effects to the Hydrogen-Bonding Water Network at Long Distance. J Am Chem Soc 2015; 137:1650-7. [DOI: 10.1021/ja5119545] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew J. DiTucci
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Sven Heiles
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
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28
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Marsh BM, Zhou J, Garand E. Charge transfer in MOH(H2O)+ (M = Mn, Fe, Co, Ni, Cu, Zn) complexes revealed by vibrational spectroscopy of mass-selected ions. Phys Chem Chem Phys 2015; 17:25786-92. [DOI: 10.1039/c5cp01522g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroxide frequency in MOH(H2O)+ is a sensitive probe of charge transfer.
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Affiliation(s)
- Brett M. Marsh
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Jia Zhou
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Etienne Garand
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
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29
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Baul U, Vemparala S. Ion hydration and associated defects in hydrogen bond network of water: observation of reorientationally slow water molecules beyond first hydration shell in aqueous solutions of MgCl2. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 91:012114. [PMID: 25679577 DOI: 10.1103/physreve.91.012114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 06/04/2023]
Abstract
Effects of the presence of ions, at moderate to high concentrations, on dynamical properties of water molecules are investigated through classical molecular dynamics simulations using two well-known nonpolarizable water models. Simulations reveal that the presence of magnesium chloride (MgCl(2)) induces perturbations in the hydrogen bond network of water leading to the formation of bulklike domains with ''defect sites'' on boundaries of such domains: water molecules at such defect sites have less number of hydrogen bonds than those in bulk water. Reorientational autocorrelation functions for dipole vectors of such defect water molecules are computed at different concentrations of ions and compared with system of pure water. Earlier experimental and simulation studies indicate significant differences in reorientational dynamics for water molecules in the first hydration shell of many dissolved ions. Results of this study suggest that defect water molecules, which are beyond the first hydration shells of ions, also experience significant slowing of reorientation times as a function of concentration in the case of MgCl(2). However, addition of cesium chloride (CsCl) to water does not perturb the hydrogen bond network of water significantly even at higher concentrations. This difference in behavior between MgCl(2) and CsCl is consistent with the well-known Hofmeister series.
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Affiliation(s)
- Upayan Baul
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
| | - Satyavani Vemparala
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
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30
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Marsh BM, Voss JM, Zhou J, Garand E. Coordination structure and charge transfer in microsolvated transition metal hydroxide clusters [MOH]+(H2O)1–4. Phys Chem Chem Phys 2015; 17:23195-206. [DOI: 10.1039/c5cp03914b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Infrared vibrational predissociation spectra of transition metal hydroxide clusters, [MOH]+(H2O)1–4·D2 with M = Mn, Fe, Co, Ni, Cu, and Zn, are presented and analyzed, showing solvent driven changes in coordination and charge transfer.
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Affiliation(s)
- Brett M. Marsh
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Jonathan M. Voss
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Jia Zhou
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Etienne Garand
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
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31
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Cooper RJ, Heiles S, DiTucci MJ, Williams ER. Hydration of Guanidinium: Second Shell Formation at Small Cluster Size. J Phys Chem A 2014; 118:5657-66. [DOI: 10.1021/jp506429a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Richard J. Cooper
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Sven Heiles
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew J. DiTucci
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Evan R. Williams
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
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32
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Chang TM, Chakrabarty S, Williams ER. Hydration of gaseous m-aminobenzoic acid: ionic vs neutral hydrogen bonding and water bridges. J Am Chem Soc 2014; 136:10440-9. [PMID: 24971758 DOI: 10.1021/ja5045874] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydration of a protonated amine and a neutral carboxylic acid were investigated for protonated m-aminobenzoic acid (MABAH(+)) with up to 15 water molecules attached using infrared photodissociation spectroscopy, laser-induced dissociation kinetics, and computational chemistry. A free COO-H stretch in the spectra of MABAH(+)·(H2O)1-5 indicates that water does not bind to the carboxylic acid H atom. This band is absent in the spectrum of MABAH(+) with six or more water molecules attached, and there is a hydrogen-bonded (HB) COO-H stretch indicating that water hydrogen bonds to the carboxylic acid H atom for these larger clusters. Photodissociation kinetic data for MABAH(+)·(H2O)6 indicate that greater than 74 ± 13% of the ion population consists of the HB COO-H isomer, consistent with this isomer being ≥0.5 kJ mol(-1) lower in energy than isomers where the carboxylic acid H atom does not donate a hydrogen bond. Calculations at the B3LYP/6-31+G** and MP2/6-31+G**//B3LYP/6-31+G** levels of theory indicate that this energy difference is 3-5 kJ mol(-1), in agreement with the experimental results. Lower effective ion heating rates, either by attenuation of the laser power or irradiation of the ions at a lower frequency, result in more time for interconversion between the free and HB COO-H isomers. These data suggest that the barrier to dissociation for the free COO-H isomer is less than that for the HB COO-H isomer but greater than the barrier for interconversion between the two isomers. These results show the competition between hydration of a primary protonated amine vs that of a neutral carboxylic acid and the effect of water bridging between the two functional groups, which provide valuable insight into the hydration of protonated amino acids and establish rigorous benchmarks for theoretical modeling of water-biomolecule interactions.
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Affiliation(s)
- Terrence M Chang
- Department of Chemistry, University of California , Berkeley, California 94720-1460, United States
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33
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Marsh BM, Zhou J, Garand E. Vibrational Spectroscopy of Small Hydrated CuOH+ Clusters. J Phys Chem A 2014; 118:2063-71. [DOI: 10.1021/jp411614t] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Brett M. Marsh
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jia Zhou
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Etienne Garand
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
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34
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Cassou CA, Williams ER. Anions in electrothermal supercharging of proteins with electrospray ionization follow a reverse Hofmeister series. Anal Chem 2014; 86:1640-7. [PMID: 24410546 PMCID: PMC3983018 DOI: 10.1021/ac403398j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
![]()
The
effects of different anions on the extent of electrothermal
supercharging of proteins from aqueous ammonium and sodium salt solutions
were investigated. Sulfate and hydrogen phosphate are the most effective
anions at producing high charge state protein ions from buffered aqueous
solution, whereas iodide and perchlorate are ineffective with electrothermal
supercharging. The propensity for these anions to produce high charge
state protein ions follows the following trend: sulfate > hydrogen
phosphate > thiocyanate > bicarbonate > chloride > formate
≈
bromide > acetate > iodide > perchlorate. This trend correlates
with
the reverse Hofmeister series over a wide range of salt concentrations
(1 mM to 2 M) and with several physical properties, including solvent
surface tension, anion viscosity B-coefficient, and anion surface/bulk
partitioning coefficient, all of which are related to the Hofmeister
series. The effectiveness of electrothermal supercharging does not
depend on bubble formation, either from thermal degradation of the
buffer or from coalescence of dissolved gas. These results provide
evidence that the effect of different ions in the formation of high
charge state ions by electrothermal supercharging is largely a result
of Hofmeister effects on protein stability leading to protein unfolding
in the heated ESI droplet.
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Affiliation(s)
- Catherine A Cassou
- Department of Chemistry, University of California , Berkeley, California 94720-1460, United States
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35
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Gas-Phase Ion Chemistry of Rare Earths and Actinides. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63256-2.00263-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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36
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Donald W, Williams E. Measuring Absolute Single Half-Cell Reduction Potentials with Mass Spectrometry. ELECTROANALYTICAL CHEMISTRY: A SERIES OF ADVANCES 2013. [DOI: 10.1201/b15576-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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37
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Abstract
The structures and inherent stabilities of hydrated, protonated ammonia, select protonated primary, secondary, and tertiary amines as well as tetramethylammonium with 19-21 water molecules were investigated using infrared photodissociation (IRPD) spectroscopy and blackbody infrared radiative dissociation (BIRD) at 133 K. Magic number clusters (MNCs) with 20 water molecules were observed for all ions except tetramethylammonium, and the BIRD results indicate that these clusters have stable structures, which are relatively unaffected by addition of one water molecule but are disrupted in clusters with one less water molecule. IRPD spectra in the water free O-H stretch region are consistent with clathrate structures for the MNCs with 20 water molecules, whereas nonclathrate structures are indicated for tetramethylammonium as well as ions at the other cluster sizes. The locations of protonated ammonia and the protonated primary amines either in the interior or at the surface of a clathrate were determined by comparing IRPD spectra of these ions to those of reference ions; Rb(+) and protonated tert-butylammonia with 20 water molecules were used as references for an ion in the interior and at the surface of a clathrate, respectively. These results indicate that protonated ammonia is in the interior of the clathrate, whereas protonated methyl- and n-heptylamine are at the surface. Calculations suggest that the number of hydrogen bonds in these clusters does not directly correlate with structural stability, indicating that both the number and orientation of the hydrogen bonds are important. These experimental results should serve as benchmarks for computational studies aimed at elucidating ion effects on the hydrogen-bonding network of water molecules and the surface activity of ions.
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Affiliation(s)
- Terrence M Chang
- Department of Chemistry, University of California , Berkeley, California 94720-1460, United States
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38
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Vila Verde A, Lipowsky R. Cooperative Slowdown of Water Rotation near Densely Charged Ions Is Intense but Short-Ranged. J Phys Chem B 2013; 117:10556-66. [DOI: 10.1021/jp4059802] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana Vila Verde
- Theory and Bio-Systems Department, Max Planck Institute of Colloids and Interfaces, Wissenschaftspark Golm, 14424 Potsdam, Germany
| | - Reinhard Lipowsky
- Theory and Bio-Systems Department, Max Planck Institute of Colloids and Interfaces, Wissenschaftspark Golm, 14424 Potsdam, Germany
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Cooper RJ, Chang TM, Williams ER. Hydrated Alkali Metal Ions: Spectroscopic Evidence for Clathrates. J Phys Chem A 2013; 117:6571-9. [DOI: 10.1021/jp405147h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Richard J. Cooper
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Terrence M. Chang
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
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40
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Fujii A, Mizuse K. Infrared spectroscopic studies on hydrogen-bonded water networks in gas phase clusters. INT REV PHYS CHEM 2013. [DOI: 10.1080/0144235x.2012.760836] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Mizuse K, Fujii A. Infrared spectroscopy of large protonated water clusters H+(H2O)20–50 cooled by inert gas attachment. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2012.07.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Husberg C, Ryde U. How are hydrogen bonds modified by metal binding? J Biol Inorg Chem 2013; 18:499-522. [DOI: 10.1007/s00775-013-0996-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
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43
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Silveira JA, Servage KA, Gamage CM, Russell DH. Cryogenic Ion Mobility-Mass Spectrometry Captures Hydrated Ions Produced During Electrospray Ionization. J Phys Chem A 2013; 117:953-61. [DOI: 10.1021/jp311278a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Joshua A. Silveira
- Texas A&M University, Department of Chemistry, College Station, Texas 77843, United States
| | - Kelly A. Servage
- Texas A&M University, Department of Chemistry, College Station, Texas 77843, United States
| | - Chaminda M. Gamage
- Texas A&M University, Department of Chemistry, College Station, Texas 77843, United States
| | - David H. Russell
- Texas A&M University, Department of Chemistry, College Station, Texas 77843, United States
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44
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Development and applications of the ABEEM fluctuating charge molecular force field in the ion-containing systems. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4787-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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45
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Chang TM, Prell JS, Warrick ER, Williams ER. Where’s the Charge? Protonation Sites in Gaseous Ions Change with Hydration. J Am Chem Soc 2012; 134:15805-13. [DOI: 10.1021/ja304929h] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Terrence M. Chang
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - James S. Prell
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Erika R. Warrick
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Evan R. Williams
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United
States
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46
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Analyzing coordination preferences of Mg2+ complexes: insights from computational and database study. Struct Chem 2012. [DOI: 10.1007/s11224-012-0113-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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Hofstetter TE, Armentrout PB. Threshold Collision-Induced Dissociation and Theoretical Studies of Hydrated Fe(II): Binding Energies and Coulombic Barrier Heights. J Phys Chem A 2012; 117:1110-23. [DOI: 10.1021/jp3044829] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Theresa E. Hofstetter
- Department
of Chemistry, University of Utah, 315 S. 1400 E. Rm 2020, Salt Lake City, Utah 84112,
United States
| | - P. B. Armentrout
- Department
of Chemistry, University of Utah, 315 S. 1400 E. Rm 2020, Salt Lake City, Utah 84112,
United States
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48
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Demireva M, O’Brien JT, Williams ER. Water-Induced Folding of 1,7-Diammoniumheptane. J Am Chem Soc 2012; 134:11216-24. [DOI: 10.1021/ja303313p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maria Demireva
- Department of Chemistry, University of California, Berkeley 94720-1460, United States
| | - Jeremy T. O’Brien
- Department of Chemistry, University of California, Berkeley 94720-1460, United States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley 94720-1460, United States
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O’Brien JT, Williams ER. Effects of Ions on Hydrogen-Bonding Water Networks in Large Aqueous Nanodrops. J Am Chem Soc 2012; 134:10228-36. [DOI: 10.1021/ja303191r] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jeremy T. O’Brien
- Department of Chemistry, University of California, Berkeley, California 94720-1460,
United States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460,
United States
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50
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First principles study and database analyses of structural preferences for sodium ion (Na+) solvation and coordination. Struct Chem 2012. [DOI: 10.1007/s11224-012-0032-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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