1
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Watanabe E, Nakajima T, Shinohara A, Kasamatsu Y. Hydration Structure of 102No 2+: A Density Functional Theory-Molecular Dynamics Study. J Phys Chem A 2024; 128:2717-2726. [PMID: 38563068 DOI: 10.1021/acs.jpca.3c08063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The hydration structure of No2+, the divalent cation of nobelium in water, was investigated by ab initio molecular dynamics (MD) simulations. First, a series of benchmark calculations were performed to validate the density functional theory (DFT) calculation methods for a molecule containing a No atom. The DFT-MD simulation of the hydration structure of No2+ was conducted after the MD method was validated by simulating the hydration structures of Ca2+ and Sr2+, whose behavior was previously reported to be similar to that of No2+. The model cluster containing M2+ (M = Ca, Sr, or No) and 32 water molecules was used for DFT-MD simulation. The results showed that the hydration distance of No2+ was intermediate between those of Ca2+ and Sr2+. This trend in the hydration distance is in good agreement with the elution position trend obtained in a previous radiochemical experiment. The calculated No-O bond lengths in the optimized structure of [No(H2O)8]2+ was 2.59 Å, while the average No-O bond length of [No(H2O)8]2+ in water by DFT-MD was 2.55 Å. This difference implies the importance of dynamic solvent effects, considering the second (and further) coordination sphere in the theoretical calculation of solution chemistry for superheavy elements.
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Affiliation(s)
- Eisuke Watanabe
- Graduate School of Science, Osaka University, Machikaneyamacho 1-1, Toyonaka, Osaka 560-0043, Japan
- Nishina Accelerator-based Science Center, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan
| | - Takahito Nakajima
- Center for Computational Science, RIKEN, Minatojimaminamimachi 7-1-26, Kobe, Hyogo 650-0047, Japan
| | - Atsushi Shinohara
- Institute for Radiation Sciences, Osaka University, Yamadaoka 2-4, Suita 565-0871, Japan
- Osaka Aoyama University, Niina 2-11-1, Minoh, Osaka 562-8580, Japan
| | - Yoshitaka Kasamatsu
- Graduate School of Science, Osaka University, Machikaneyamacho 1-1, Toyonaka, Osaka 560-0043, Japan
- Nishina Accelerator-based Science Center, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan
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2
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Blazquez S, Bourg IC, Vega C. Madrid-2019 force field: An extension to divalent cations Sr2+ and Ba2. J Chem Phys 2024; 160:046101. [PMID: 38270237 DOI: 10.1063/5.0186233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 12/27/2023] [Indexed: 01/26/2024] Open
Abstract
In this work, we present a parameterization of Sr2+ and Ba2+ cations, which expands the alkali earth set of cations of the Madrid-2019 force field. We have tested the model against the experimental densities of eight different salts, namely, SrCl2, SrBr2, SrI2, Sr(NO3)2, BaCl2, BaBr2, BaI2, and Ba(NO3)2. The force field is able to reproduce the experimental densities of all these salts up to their solubility limit. Furthermore, we have computed the viscosities for two selected salts, finding that the experimental values are overestimated, but the predictions are still reasonable. Finally, the structural properties for all the salts have been calculated with this model and align remarkably well with experimental observations.
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Affiliation(s)
- S Blazquez
- Dpto. Química Física I, Fac. Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Ian C Bourg
- Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544, USA
- High Meadows Environmental Institute, Princeton University, Princeton, New Jersey 08544, USA
| | - C Vega
- Dpto. Química Física I, Fac. Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
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3
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Mazmanian K, Grauffel C, Dudev T, Lim C. Protein Ca 2+-Sites Prone to Sr 2+ Substitution: Implications for Strontium Therapy. J Phys Chem B 2023. [PMID: 37327495 DOI: 10.1021/acs.jpcb.3c01637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Strontium (Sr), an alkali metal with properties similar to calcium, in the form of soluble salts is used to treat osteoporosis. Despite the information accumulated on the role of Sr2+ as a Ca2+ mimetic in biology and medicine, there is no systematic study of how the outcome of the competition between the two dications depends on the physicochemical properties of (i) the metal ions, (ii) the first- and second-shell ligands, and (iii) the protein matrix. Specifically, the key features of a Ca2+-binding protein that enable Sr2+ to displace Ca2+ remain unclear. To address this, we studied the competition between Ca2+ and Sr2+ in protein Ca2+-binding sites using density functional theory combined with the polarizable continuum model. Our findings indicate that Ca2+-sites with multiple strong charge-donating protein ligands, including one or more bidentately bound Asp-/Glu- that are relatively buried and rigid are protected against Sr2+ attack. On the other hand, Ca2+-sites crowded with multiple protein ligands may be prone to Sr2+ displacement if they are solvent-exposed and flexible enough so that an extra backbone ligand from the outer shell can bind to Sr2+. In addition, solvent-exposed Ca2+ sites with only a few weak charge-donating ligands that can rearrange to fit the strontium's coordination requirements are susceptible to Sr2+ displacement. We provide the physical basis of these results and discuss potential novel protein targets of therapeutic Sr2+.
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Affiliation(s)
- Karine Mazmanian
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Cédric Grauffel
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Todor Dudev
- Faculty of Chemistry and Pharmacy, Sofia University, Sofia 1164, Bulgaria
| | - Carmay Lim
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
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4
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D'Angelo P, Migliorati V, Gibiino A, Busato M. Direct Observation of Contact Ion-Pair Formation in La 3+ Methanol Solution. Inorg Chem 2022; 61:17313-17321. [PMID: 36255362 PMCID: PMC9627567 DOI: 10.1021/acs.inorgchem.2c02932] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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An approach combining molecular dynamics (MD) simulations
and X-ray
absorption spectroscopy (XAS) has been used to carry out a comparative
study about the solvation properties of dilute La(NO3)3 solutions in water and methanol, with the aim of elucidating
the still elusive coordination of the La3+ ion in the latter
medium. The comparison between these two systems enlightened a different
behavior of the nitrate counterions in the two environments: while
in water the La(NO3)3 salt is fully dissociated
and the La3+ ion is coordinated by water molecules only,
the nitrate anions are able to enter the metal first solvation shell
to form inner-sphere complexes in methanol solution. The speciation
of the formed complexes showed that the 10-fold coordination is preferential
in methanol solution, where the nitrate anions coordinate the La3+ cations in a monodentate fashion and the methanol molecules
complete the solvation shell to form an overall bicapped square antiprism
geometry. This is at variance with the aqueous solution where a more
balanced situation is observed between the 9- and 10-fold coordination.
An experimental confirmation of the MD results was obtained by La
K-edge XAS measurements carried out on 0.1 M La(NO3)3 solutions in the two solvents, showing the distinct presence
of the nitrate counterions in the La3+ ion first solvation
sphere of the methanol solution. The analysis of the extended X-ray
absorption fine structure (EXAFS) part of the absorption spectrum
collected on the methanol solution was carried out starting from the
MD results and confirmed the structural arrangement observed by the
simulations. The formation of contact ion pairs between
the La3+ ions and the nitrate anions has been demonstrated
in diluted methanol
solution using a combined approach using Molecular Dynamics simulations
and X-ray absorption spectroscpy.
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Affiliation(s)
- Paola D'Angelo
- Department of Chemistry, University of Rome "La Sapienza", P.le Aldo Moro 5, 00185 Rome, Italy
| | - Valentina Migliorati
- Department of Chemistry, University of Rome "La Sapienza", P.le Aldo Moro 5, 00185 Rome, Italy
| | - Alice Gibiino
- Department of Chemistry, University of Rome "La Sapienza", P.le Aldo Moro 5, 00185 Rome, Italy
| | - Matteo Busato
- Department of Chemistry, University of Rome "La Sapienza", P.le Aldo Moro 5, 00185 Rome, Italy
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5
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Migliorati V, Busato M, D’Angelo P. Solvation structure of the Hg(NO3)2 and Hg(TfO)2 salts in dilute aqueous and methanol solutions: An insight into the Hg2+ coordination chemistry. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Tavani F, Busato M, Braglia L, Mauri S, Torelli P, D’Angelo P. Caught while Dissolving: Revealing the Interfacial Solvation of the Mg 2+ Ions on the MgO Surface. ACS APPLIED MATERIALS & INTERFACES 2022; 14:38370-38378. [PMID: 35968677 PMCID: PMC9412945 DOI: 10.1021/acsami.2c10005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
Interfaces between water and materials are ubiquitous and are crucial in materials sciences and in biology, where investigating the interaction of water with the surface under ambient conditions is key to shedding light on the main processes occurring at the interface. Magnesium oxide is a popular model system to study the metal oxide-water interface, where, for sufficient water loadings, theoretical models have suggested that reconstructed surfaces involving hydrated Mg2+ metal ions may be energetically favored. In this work, by combining experimental and theoretical surface-selective ambient pressure X-ray absorption spectroscopy with multivariate curve resolution and molecular dynamics, we evidence in real time the occurrence of Mg2+ solvation at the interphase between MgO and solvating media such as water and methanol (MeOH). Further, we show that the Mg2+ surface ions undergo a reversible solvation process, we prove the dissolution/redeposition of the Mg2+ ions belonging to the MgO surface, and we demonstrate the formation of octahedral [Mg(H2O)6]2+ and [Mg(MeOH)6]2+ intermediate solvated species. The unique surface, electronic, and structural sensitivity of the developed technique may be beneficial to access often elusive properties of low-Z metal ion intermediates involved in interfacial processes of chemical and biological interest.
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Affiliation(s)
- Francesco Tavani
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
| | - Matteo Busato
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
| | - Luca Braglia
- CNR
- Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
| | - Silvia Mauri
- CNR
- Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
- Dipartimento
di Fisica, Università di Trieste, Via A. Valerio 2, 34127 Trieste, Italy
| | - Piero Torelli
- CNR
- Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
| | - Paola D’Angelo
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
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7
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Busato M, Fazio G, Tavani F, Pollastri S, D'Angelo P. Solubilization and coordination of the HgCl 2 molecule in water, methanol, acetone, and acetonitrile: an X-ray absorption investigation. Phys Chem Chem Phys 2022; 24:18094-18102. [PMID: 35880669 DOI: 10.1039/d2cp02106d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray absorption spectroscopy (XAS) has been employed to carry out structural characterization of the local environment around mercury after the dissolution of the HgCl2 molecule. A combined EXAFS (extended X-ray absorption fine structure) and XANES (X-ray absorption near edge structure) data analysis has been performed on the Hg L3-edge absorption spectra recorded on 0.1 M HgCl2 solutions in water, methanol (MeOH), acetone and acetonitrile. The Hg-Cl distance determined by EXAFS (2.29(2)-2.31(2) Å) is always comparable to that found in the HgCl2 crystal (2.31(2) Å), demonstrating that the HgCl2 molecule dissolves in these solvents without dissociating. A small sensitivity of EXAFS to the solvent molecules interacting with HgCl2 has been detected and indicates a high degree of configurational disorder associated with this contribution. XANES data analysis, which is less affected by the disorder, was therefore carried out for the first time on these systems to shed light into the still elusive structural arrangement of the solvent molecules around HgCl2. The obtained results show that, in aqueous and MeOH solutions, the XANES data are compatible with three solvent molecules arranged around the HgCl2 unit to form a trigonal bipyramidal structure. The determination of the three-body Cl-Hg-Cl distribution shows a certain degree of uncertainty around the average 180° bond angle value, suggesting that the HgCl2 molecule probably vibrates in the solution around a linear configuration.
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Affiliation(s)
- Matteo Busato
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy.
| | - Giuseppe Fazio
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy.
| | - Francesco Tavani
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy.
| | - Simone Pollastri
- Elettra-Sincrotrone Trieste S.C.p.A, s.s. 14, km 163.5, I-34149, Basovizza, Trieste, Italy
| | - Paola D'Angelo
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy.
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8
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Busato M, Tofoni A, Mannucci G, Tavani F, Del Giudice A, Colella A, Giustini M, D'Angelo P. On the Role of Water in the Formation of a Deep Eutectic Solvent Based on NiCl 2·6H 2O and Urea. Inorg Chem 2022; 61:8843-8853. [PMID: 35616906 PMCID: PMC9199011 DOI: 10.1021/acs.inorgchem.2c00864] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The metal-based deep
eutectic solvent (MDES) formed by NiCl2·6H2O and urea in 1:3.5 molar ratio has been
prepared for the first time and characterized from a structural point
of view. Particular accent has been put on the role of water in the
MDES formation, since the eutectic could not be obtained with the
anhydrous form of the metal salt. To this end, mixtures at different
water/MDES molar ratios (W) have been studied with
a combined approach exploiting molecular dynamics and ab initio simulations, UV–vis and near-infra-red spectroscopies, small-
and wide-angle X-ray scattering, and X-ray absorption spectroscopy
measurements. In the pure MDES, a close packing of Ni2+ ion clusters forming oligomeric agglomerates is present thanks to
the mediation of bridging chloride anions and water molecules. Conversely,
urea poorly coordinates the metal ion and is mostly found in the interstitial
regions among the Ni2+ ion oligomers. This nanostructure
is disrupted upon the introduction of additional water, which enlarges
the Ni–Ni distances and dilutes the system up to an aqueous
solution of the MDES constituents. In the NiCl2·6H2O 1:3.5 MDES, the Ni2+ ion is coordinated on average
by one chloride anion and five water molecules, while water easily
saturates the metal solvation sphere to provide a hexa-aquo coordination
for increasing W values. This multidisciplinary study
allowed us to reconstruct the structural arrangement of the MDES and
its aqueous mixtures on both short- and intermediate-scale levels,
clarifying the fundamental role of water in the eutectic formation
and challenging the definition at the base of these complex systems. The metal-based deep eutectic solvent
formed by NiCl2·6H2O and urea in 1:3.5
a molar ratio was
prepared for the first time, and its aqueous mixtures were characterized
from a structural point of view, highlighting the fundamental role
of water in the eutectic formation.
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Affiliation(s)
- Matteo Busato
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Alessandro Tofoni
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Giorgia Mannucci
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Francesco Tavani
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Alessandra Del Giudice
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Andrea Colella
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Mauro Giustini
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
| | - Paola D'Angelo
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, Rome 00185, Italy
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9
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Lynch TJ, Birkner NR, Christian MS, Wrubel JA, Schorne-Pinto J, Van Veelen A, Bargar JR, Besmann TM, Brinkman KS, Chiu WKS. In Situ Determination of Speciation and Local Structure of NaCl-SrCl 2 and LiF-ZrF 4 Molten Salts. J Phys Chem B 2022; 126:1539-1550. [PMID: 35138853 DOI: 10.1021/acs.jpcb.1c07552] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding the local environment of the metal atoms in salt melts is important for modeling the properties of melts and predicting their behavior and thus helping enable the development of technologies such as molten salt reactors and solar-thermal power systems and new approaches to recycling rare-earth metals. Toward that end, we have developed an in situ approach for measuring the coordination of metals in molten salt coupling X-ray absorption spectroscopy (XAS) and Raman spectroscopy. Our approach was demonstrated for two salt mixtures (1.9 and 5 mol % SrCl2 in NaCl, 0.8 and 5 mol % ZrF4 in LiF) at up to 1100 °C. Near-edge (X-ray absorption near-edge structure, XANES) and extended X-ray absorption fine structure (EXAFS) spectra were measured. The EXAFS response was modeled using ab initio FEFF calculations. Strontium's first shell is observed to be coordinated with chlorine (Sr2+-Cl-) and zirconium's first shell is coordinated by fluorine (Zr4+-F-), both having coordination numbers that decrease with increasing temperature. Multiple zirconium complexes are believed to be present in the melt, which may interfere and distort the EXAFS spectra and result in an anomalously low zirconium first shell coordination number. The use of boron nitride (BN) powder as a salt diluent for XAFS measurements was found to not interfere with measurements and thus can be used for investigations of such systems.
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Affiliation(s)
- Timothy J Lynch
- Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut 06369-3139, United States
| | - Nancy R Birkner
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634-0901, United States
| | - Matthew S Christian
- Nuclear Engineering Program, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jacob A Wrubel
- Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut 06369-3139, United States
| | - Juliano Schorne-Pinto
- Nuclear Engineering Program, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Arjen Van Veelen
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - John R Bargar
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Theodore M Besmann
- Nuclear Engineering Program, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Kyle S Brinkman
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634-0901, United States
| | - Wilson K S Chiu
- Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut 06369-3139, United States
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10
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Tavani F, Fracchia M, Tofoni A, Braglia L, Jouve A, Morandi S, Manzoli M, Torelli P, Ghigna P, D'Angelo P. Structural and mechanistic insights into low-temperature CO oxidation over a prototypical high entropy oxide by Cu L-edge operando soft X-ray absorption spectroscopy. Phys Chem Chem Phys 2021; 23:26575-26584. [PMID: 34812450 DOI: 10.1039/d1cp03946f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High entropy oxides (HEOs) are an emerging class of materials constituted by multicomponent systems that are receiving special interest as candidates for obtaining novel and desirable properties. In this study we present a detailed investigation of the relevant intermediates arising at the surface of the prototypical HEO Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O during low-temperature CO oxidation. By combining Cu L2,3-edge operando soft X-ray absorption spectroscopy (soft-XAS) with density functional theory simulations and in situ FT-IR spectroscopy, we propose that upon HEO exposure to CO at 235 °C reduced Cu(I) sites arise mostly coordinated to activated CO molecules and partly to bidentate carbonate species. When the HEO surface is then exposed to a stoichiometric mixture of CO + 1/2O2 at 250 °C, CO2 is produced while bidentate carbonate moieties remain interacting with the Cu(I) sites. We structurally characterize the carbonate and CO preferential adsorption geometries on the Cu(I) surface metal centers, and find that CO adopts a bent conformation that may energetically favor its subsequent oxidation. The unique surface, structural and electronic sensitivity of soft-XAS coupled with the developed data analysis work-flow and supported by FT-IR spectroscopy may be beneficial to characterize often elusive surface properties of systems of catalytic interest.
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Affiliation(s)
- Francesco Tavani
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Martina Fracchia
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 16, 27100 Pavia, Italy
| | - Alessandro Tofoni
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Luca Braglia
- CNR - Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
| | - Andrea Jouve
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Torino, Italy
| | - Sara Morandi
- Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Maela Manzoli
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Torino, Italy
| | - Piero Torelli
- CNR - Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
| | - Paolo Ghigna
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 16, 27100 Pavia, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
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11
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Del Giudice D, Tavani F, Di Berto Mancini M, Frateloreto F, Busato M, Oliveira De Souza D, Cenesi F, Lanzalunga O, Di Stefano S, D'Angelo P. Two Faces of the Same Coin: Coupling X-Ray Absorption and NMR Spectroscopies to Investigate the Exchange Reaction Between Prototypical Cu Coordination Complexes. Chemistry 2021; 28:e202103825. [PMID: 34850474 DOI: 10.1002/chem.202103825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Indexed: 12/21/2022]
Abstract
The satisfactory rationalization of complex reactive pathways in solution chemistry may greatly benefit from the combined use of advanced experimental and theoretical complementary methods of analysis. In this work, we combine X-Ray Absorption and 1 H NMR spectroscopies with state-of-the-art Multivariate Curve Resolution and theoretical analyses to gain a comprehensive view on a prototypical reaction involving the variation of the oxidation state and local structure environment of a selected metal ion coordinated by organic ligands. Specifically, we investigate the 2-cyano-2-phenylpropanoic acid reduction of the octahedral complex established by the Cu2+ ion with terpyridine to the tetrahedral complex formed by Cu+ and neocuproine. Through our interdisciplinary approach we gain insights into the nature, concentration time evolution and structures of the key metal (XAS measurements) and organic (1 H NMR measurements) species under reaction. We believe our method may prove to be useful in the toolbox necessary to understand the mechanisms of reactive processes of interest in solution.
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Affiliation(s)
- Daniele Del Giudice
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Francesco Tavani
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Marika Di Berto Mancini
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Federico Frateloreto
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Matteo Busato
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Danilo Oliveira De Souza
- Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - Flavia Cenesi
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185, Rome, Italy
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12
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Walden K, Martin ME, LaBee L, Provorse Long M. Hydration and Charge-Transfer Effects of Alkaline Earth Metal Ions Binding to a Carboxylate Anion, Phosphate Anion, and Guanine Nucleobase. J Phys Chem B 2021; 125:12135-12146. [PMID: 34706195 DOI: 10.1021/acs.jpcb.1c05757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To investigate the ability of alkaline earth metal ions to tune ion-mediated DNA adsorption, hydrated Mg2+, Ca2+, Sr2+, and Ba2+ ions bound to a carboxylate anion, phosphate anion, and guanine nucleobase were modeled using density functional theory (DFT) and a combined explicit and continuum solvent model. The large first solvation shell of Ba2+ requires a larger solute cavity defined by a solvent-accessible surface, which is used to model all hydrated ions. Alkaline earth metal ions bind indirectly or directly to each binding site. DFT binding energies decrease with increasing ion size, which is likely due to ion size and hydration structure, rather than quantum effects such as charge transfer. However, charge transfer explains weaker ion binding to guanine compared to phosphate or carboxylate. Overall, carboxylate and phosphate anions are expected to compete equally for hydrated Mg2+, Ca2+, Sr2+, and Ba2+ ions and larger alkaline earth metal ions may induce weaker ion-mediated adsorption. The ion size and hydration structure of alkaline earth metal ions may effectively tune ion-mediated adsorption processes, such as DNA adsorption to functionalized surfaces.
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Affiliation(s)
- Kathryn Walden
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Madison E Martin
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Lacey LaBee
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Makenzie Provorse Long
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
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13
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Migliorati V, Gibiino A, Lapi A, Busato M, D'Angelo P. On the Coordination Chemistry of the lanthanum(III) Nitrate Salt in EAN/MeOH Mixtures. Inorg Chem 2021; 60:10674-10685. [PMID: 34236168 PMCID: PMC8389800 DOI: 10.1021/acs.inorgchem.1c01375] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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A thorough structural
characterization of the La(NO3)3 salt dissolved
into several mixtures of ethyl ammonium
nitrate (EAN) and methanol (MeOH) with EAN molar fraction χEAN ranging from 0 to 1 has been carried out by combining molecular
dynamics (MD) and X-ray absorption spectroscopy (XAS). The XAS and
MD results show that changes take place in the La3+ first
solvation shell when moving from pure MeOH to pure EAN. With increasing
the ionic liquid content of the mixture, the La3+ first-shell
complex progressively loses MeOH molecules to accommodate more and
more nitrate anions. Except in pure EAN, the La3+ ion is
always able to coordinate both MeOH and nitrate anions, with a ratio
between the two ligands that changes continuously in the entire concentration
range. When moving from pure MeOH to pure EAN, the La3+ first solvation shell passes from a 10-fold bicapped square antiprism
geometry where all the nitrate anions act only as monodentate ligands
to a 12-coordinated icosahedral structure in pure EAN where the nitrate
anions bind the La3+ cation both in mono- and bidentate
modes. The La3+ solvation structure formed in the MeOH/EAN
mixtures shows a great adaptability to changes in the composition,
allowing the system to reach the ideal compromise among all of the
different interactions that take place into it. The structural properties of the La(NO3)3 salt dissolved into EAN/methanol mixtures were
characterized
by molecular dynamics and X-ray absorption spectroscopy. The La3+ solvation shell undergoes significant changes with increasing
the ionic liquid content of the mixture, progressively losing methanol
molecules to accommodate more and more nitrate anions. The La3+ solvation structure shows great adaptability to composition
changes, passing from a 10-fold bicapped square antiprism geometry
in pure methanol to a 12-coordinated icosahedral complex in EAN.
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Affiliation(s)
- Valentina Migliorati
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Alice Gibiino
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Andrea Lapi
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Matteo Busato
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
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14
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Busato M, Lapi A, D’Angelo P, Melchior A. Coordination of the Co 2+ and Ni 2+ Ions in Tf 2N - Based Ionic Liquids: A Combined X-ray Absorption and Molecular Dynamics Study. J Phys Chem B 2021; 125:6639-6648. [PMID: 34109780 PMCID: PMC8279557 DOI: 10.1021/acs.jpcb.1c03395] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/30/2021] [Indexed: 11/29/2022]
Abstract
Molecular dynamics (MD) simulations and X-ray absorption spectroscopy (XAS) have been combined to study the coordination of the Co2+ and Ni2+ ions in ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl)imide ([Tf2N]-) anion and having different organic cations, namely, 1-butyl-3-methylimidazolium ([C4mim]+), 1,8-bis(3-methylimidazolium-1-yl)octane ([C8(mim)2]2+), N,N,N-trimethyl-N-(2-hydroxyethyl)ammonium ([choline]+), and butyltrimethylammonium ([BTMA]+). Co and Ni K-edge XAS data have been collected on 0.1 mol L-1 Co(Tf2N)2 and Ni(Tf2N)2 solutions and on the metallic salts. MD simulations have been carried out to obtain structural information on the metal ion coordination. The analysis of the extended X-ray absorption fine structure (EXAFS) spectra of the solutions has been carried out based on the atomistic description provided by MD, and the studied ILs have been found to be able to dissolve both the Co(Tf2N)2 and Ni(Tf2N)2 salts giving rise to a different structural arrangement around the metal ions as compared to the solid state. The combined EXAFS and MD results showed that the Co2+ and Ni2+ ions are surrounded by a first solvation shell formed by six [Tf2N]- anions, each coordinating in a monodentate fashion by means of the oxygen atoms. The nature of the IL organic cation has little or no influence on the overall spatial arrangement of the [Tf2N]- anions, so that stable octahedral complexes of the type [M(Tf2N)6]4- (M = Co, Ni) have been observed in all the investigated ILs.
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Affiliation(s)
- Matteo Busato
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy
- DPIA,
Laboratorio di Scienze e Tecnologie Chimiche, Università di Udine, Via del Cotonificio 108, 33100 Udine, Italy
| | - Andrea Lapi
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Paola D’Angelo
- Dipartimento
di Chimica, Università di Roma “La
Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Andrea Melchior
- DPIA,
Laboratorio di Scienze e Tecnologie Chimiche, Università di Udine, Via del Cotonificio 108, 33100 Udine, Italy
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15
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Xu HT, Zhang N, Li MR, Zhang FS. Anion effect of Cl−, I−, and F− on counterions condensation within nucleic acid ion atmosphere. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Migliorati V, Fazio G, Pollastri S, Gentili A, Tomai P, Tavani F, D'Angelo P. Solubilization properties and structural characterization of dissociated HgO and HgCl2 in deep eutectic solvents. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115505] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Smirnov PR. Structural Parameters of the Nearest Surrounding of Group II
Metal Ions in Oxygen-Containing Solvents. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221030129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Hong J, Heo SJ, Singh P. Water mediated growth of oriented single crystalline SrCO 3 nanorod arrays on strontium compounds. Sci Rep 2021; 11:3368. [PMID: 33564032 PMCID: PMC7873059 DOI: 10.1038/s41598-021-82651-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 01/18/2021] [Indexed: 01/30/2023] Open
Abstract
Morphology-controlled strontianite nanostructures have attracted interest in various fields, such as electrocatalyst and photocatalysts. Basic additives in aqueous strontium solutions is commonly used in controlling strontianite nanostructures. Here, we show that trace water also serves an important role in forming and structuring vertically oriented strontianite nanorod arrays on strontium compounds. Using in situ Raman spectroscopy, we monitored the structural evolution from hydrated strontium to strontianite nanorods, demonstrating the epitaxial growth by vapor-liquid-solid mechanism. Water molecules cause not only the exsolution of Sr liquid droplets on the surface but also the uptake of airborne CO2 followed by its ionization to CO32-. The existence of intermediate SrHO+-OCO22- phase indicates the interaction of CO32- with SrOH+ in Sr(OH)x(H2O)y cluster to orient strontianite crystals. X-ray diffraction simulation and transmission electron microscopy identify the preferred-orientation plane of the 1D nanostructures as the (002) plane, i.e., the growth along the c-axis. The anisotropic growth habit is found to be affected by the kinetics of carbonation. This study paves the way for designing and developing 1D architecture of alkaline earth metal carbonates by a simple method without external additives at room temperature.
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Affiliation(s)
- Junsung Hong
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Su Jeong Heo
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Materials Science Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Prabhakar Singh
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, 06269, USA.
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19
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Tavani F, Capocasa G, Martini A, Sessa F, Di Stefano S, Lanzalunga O, D'Angelo P. Activation of C-H bonds by a nonheme iron(IV)-oxo complex: mechanistic evidence through a coupled EDXAS/UV-Vis multivariate analysis. Phys Chem Chem Phys 2021; 23:1188-1196. [PMID: 33355324 DOI: 10.1039/d0cp04304d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The understanding of reactive processes involving organic substrates is crucial to chemical knowledge and requires multidisciplinary efforts for its advancement. Herein, we apply a combined multivariate, statistical and theoretical analysis of coupled time-resolved X-ray absorption (XAS)/UV-Vis data to obtain detailed mechanistic information for on the C-H bond activation of 9,10-dihydroanthracene (DHA) and diphenylmethane (Ph2CH2) by the nonheme FeIV-oxo complex [N4Py·FeIV(O)]2+ (N4Py = N,N-bis(2-pyridylmethyl)-N-bis(2-pyridyl)methylamine) in CH3CN at room temperature. Within this approach, we determine the number of key chemical species present in the reaction mixtures and derive spectral and concentration profiles for the reaction intermediates. From the quantitative analysis of the XAS spectra the transient intermediate species are structurally determined. As a result, it is suggested that, while DHA is oxidized by [N4Py·FeIV(O)]2+ with a hydrogen atom transfer-electron transfer (HAT-ET) mechanism, Ph2CH2 is oxidized by the nonheme iron-oxo complex through a HAT-radical dissociation pathway. In the latter process, we prove that the intermediate FeIII complex [N4Py·FeIII(OH)]2+ is not able to oxidize the diphenylmethyl radical and we provide its structural characterization in solution. The employed combined experimental and theoretical strategy is promising for the spectroscopic characterization of transient intermediates as well as for the mechanistic investigation of redox chemical transformations on the second to millisecond time scales.
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Affiliation(s)
- Francesco Tavani
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Giorgio Capocasa
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Andrea Martini
- Dipartimento di Chimica, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy and The Smart Materials Research Institute, Southern Federal University, 344090 Sladkova 178/24 Rostov-on-Don, Russia
| | - Francesco Sessa
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
| | - Paola D'Angelo
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
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20
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Tavani F, Capocasa G, Martini A, Sessa F, Di Stefano S, Lanzalunga O, D'Angelo P. Direct structural and mechanistic insights into fast bimolecular chemical reactions in solution through a coupled XAS/UV–Vis multivariate statistical analysis. Dalton Trans 2021; 50:131-142. [DOI: 10.1039/d0dt03083j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined multivariate and theoretical analysis of coupled XAS/UV–Vis data was proven to be an innovative method to obtain direct structural and mechanistic evidence for bimolecular reactions in solution involving organic substrates.
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Affiliation(s)
- Francesco Tavani
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Giorgio Capocasa
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Andrea Martini
- Dipartimento di Chimica
- Università degli Studi di Torino
- 10125 Torino
- Italy
- The Smart Materials Research Institute
| | - Francesco Sessa
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | | | | | - Paola D'Angelo
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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21
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Busato M, Melchior A, Migliorati V, Colella A, Persson I, Mancini G, Veclani D, D'Angelo P. Elusive Coordination of the Ag + Ion in Aqueous Solution: Evidence for a Linear Structure. Inorg Chem 2020; 59:17291-17302. [PMID: 33233885 DOI: 10.1021/acs.inorgchem.0c02494] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
X-ray absorption spectroscopy (XAS) has been employed to study the coordination of the Ag+ ion in aqueous solution. The conjunction of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) data analysis provided results suggesting the preference for a first shell linear coordination with a mean Ag-O bond distance of 2.34(2) Å, different from the first generally accepted tetrahedral model with a longer mean Ag-O bond distance. Ab initio molecular dynamics simulations with the Car-Parrinello approach (CPMD) were also performed and were able to describe the coordination of the hydrated Ag+ ion in aqueous solution in very good agreement with the experimental data. The high sensitivity for the closest environment of the photoabsorber of the EXAFS and XANES techniques, together with the long-range information provided by CPMD and large-angle X-ray scattering (LAXS), allowed us to reconstruct the three-dimensional model of the coordination geometry around the Ag+ ion in aqueous solution. The obtained results from experiments and theoretical simulations provided a complex picture with a certain amount of water molecules with high configurational disorder at distances comprised between the first and second hydration spheres. This evidence may have caused the proliferation of the coordination numbers that have been proposed so far for Ag+ in water. Altogether these data show how the description of the hydration of the Ag+ ion in aqueous solution can be complex, differently from other metal species where hydration structures can be described by clusters with well-defined geometries. This diffuse hydration shell causes the Ag-O bond distance in the linear [Ag(H2O)2]+ ion to be ca. 0.2 Å longer than in isolated ions in solid state.
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Affiliation(s)
- Matteo Busato
- Dipartimento Politecnico di Ingegneria e Architettura (DPIA), Laboratori di Chimica, Università di Udine, via delle Scienze 99, 33100 Udine, Italy.,Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Andrea Melchior
- Dipartimento Politecnico di Ingegneria e Architettura (DPIA), Laboratori di Chimica, Università di Udine, via delle Scienze 99, 33100 Udine, Italy
| | - Valentina Migliorati
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Andrea Colella
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Ingmar Persson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences (SLU), SE-750 07 Uppsala, Sweden
| | - Giordano Mancini
- Centro HPC, Scuola Normale Superiore, Piazza San Silvestro 12, 56125 Pisa, Italy
| | - Daniele Veclani
- Dipartimento Politecnico di Ingegneria e Architettura (DPIA), Laboratori di Chimica, Università di Udine, via delle Scienze 99, 33100 Udine, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
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22
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Manju, Jain M, Madas S, Vashishtha P, Rajput P, Gupta G, Kahaly MU, Özdoğan K, Vij A, Thakur A. Oxygen vacancies induced photoluminescence in [Formula: see text] nanophosphors probed by theoretical and experimental analysis. Sci Rep 2020; 10:17364. [PMID: 33060718 PMCID: PMC7567121 DOI: 10.1038/s41598-020-74436-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 09/16/2020] [Indexed: 11/22/2022] Open
Abstract
We report, for the first time, the influence of oxygen vacancies on band structure and local electronic structure of [Formula: see text] (SZO) nanophosphors by combined first principle calculations based on density functional theory and full multiple scattering theory, correlated with experimental results obtained from X-ray absorption and photoluminescence spectroscopies. The band structure analysis from density functional theory revealed the formation of new energy states in the forbidden gap due to introduction of oxygen vacancies in the system, thereby causing disruption in intrinsic symmetry and altering bond lengths in SZO system. These defect states are anticipated as origin of observed photoluminescence in SZO nanophosphors. The experimental X-ray absorption near edge structure (XANES) at Zn and Sr K-edges were successfully imitated by simulated XANES obtained after removing oxygen atoms around Zn and Sr cores, which affirmed the presence and signature of oxygen vacancies on near edge structure.
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Affiliation(s)
- Manju
- Advanced Materials Research Lab, Department of Basic and Applied Sciences, Punjabi University Patiala, Patiala, Punjab 147 002 India
- Department of Physics, Punjabi University Patiala, Patiala, Punjab 147 002 India
| | - Megha Jain
- Advanced Materials Research Lab, Department of Basic and Applied Sciences, Punjabi University Patiala, Patiala, Punjab 147 002 India
- Department of Physics, Punjabi University Patiala, Patiala, Punjab 147 002 India
| | - Saibabu Madas
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., H-6728 Szeged, Hungary
- Institute of Physics, University of Szeged, Dóm tér 9, 6720 Szeged, Hungary
| | - Pargam Vashishtha
- Sensor Devices and Metrology Group, CSIR-National Physical Laboratory (CSIR-NPL), Dr. K. S. Krishnan Road, New Delhi, 110 012 India
- Academy of Scientific and Innovative Research, (AcSIR), CSIR-HRDC Campus, Ghaziabad, Uttar Pradesh 201 002 India
| | - Parasmani Rajput
- Atomic and Molecular Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, 400 085 India
| | - Govind Gupta
- Sensor Devices and Metrology Group, CSIR-National Physical Laboratory (CSIR-NPL), Dr. K. S. Krishnan Road, New Delhi, 110 012 India
| | - Mousumi Upadhyay Kahaly
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., H-6728 Szeged, Hungary
- Institute of Physics, University of Szeged, Dóm tér 9, 6720 Szeged, Hungary
| | - Kemal Özdoğan
- Department of Physics, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Ankush Vij
- Nanophosphors Lab, Department of Physics, Amity University Haryana, Gurgaon, Haryana 122 413 India
- Department of Physics, University of Petroleum and Energy Studies, Dehradun, Uttarakhand 248 007 India
| | - Anup Thakur
- Advanced Materials Research Lab, Department of Basic and Applied Sciences, Punjabi University Patiala, Patiala, Punjab 147 002 India
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23
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Tavani F, Martini A, Capocasa G, Di Stefano S, Lanzalunga O, D'Angelo P. Direct Mechanistic Evidence for a Nonheme Complex Reaction through a Multivariate XAS Analysis. Inorg Chem 2020; 59:9979-9989. [PMID: 32598841 PMCID: PMC8008396 DOI: 10.1021/acs.inorgchem.0c01132] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
In
this work, we propose a method to directly determine the mechanism
of the reaction between the nonheme complex FeII(tris(2-pyridylmethyl)amine)
([FeII(TPA)(CH3CN)2]2+) and peracetic acid (AcOOH) in CH3CN, working at room
temperature. A multivariate analysis is applied to the time-resolved
coupled energy-dispersive X-ray absorption spectroscopy (EDXAS) reaction
data, from which a set of spectral and concentration profiles for
the reaction key species is derived. These “pure” extracted
EDXAS spectra are then quantitatively characterized by full multiple
scattering (MS) calculations. As a result, structural information
for the elusive reaction intermediates [FeIII(TPA)(κ2-OOAc)]2+ and [FeIV(TPA)(O)(X)]+/2+ is obtained, and it is suggested that X = AcO– in opposition to X = CH3CN. The employed strategy is
promising both for the spectroscopic characterization of reaction
intermediates that are labile or silent to the conventional spectroscopic
techniques, as well as for the mechanistic understanding of complex
redox reactions involving organic substrates. A combined multivariate and theoretical XAS analysis was
proven to be a powerful method to obtain direct evidence for the mechanism
of the reaction between the nonheme complex FeII(tris(2-pyridymethyl)amine)
([FeII(TPA)(CH3CN)2]2+) and peroxyacetic acid. This approach allowed to determine the time
evolution of the concentration profiles for all reaction intermediates
and to quantitatively characterize their structures, suggesting the
sixth coordinating ligand of the nonheme oxo complex [FeIV(TPA)(O)(X)]+/2+ is X = AcO− in
opposition to X = CH3CN.
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Affiliation(s)
- Francesco Tavani
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Andrea Martini
- Dipartimento di Chimica, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy.,The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - Giorgio Capocasa
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
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24
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Busato M, D'Angelo P, Lapi A, Tolazzi M, Melchior A. Solvation of Co2+ ion in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid: A molecular dynamics and X-ray absorption study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112120] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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25
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Migliorati V, Lapi A, D'Angelo P. Unraveling the solvation geometries of the lanthanum(iii) bistriflimide salt in ionic liquid/acetonitrile mixtures. Phys Chem Chem Phys 2020; 22:20434-20443. [PMID: 32915187 DOI: 10.1039/d0cp03977b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
La(Tf2N)3 in C8(mim)2(Tf2N)2/acetonitrile mixtures forms 10-fold coordination complexes composed of both acetonitrile molecules and Tf2N− anions.
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Affiliation(s)
| | - Andrea Lapi
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Paola D'Angelo
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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26
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Long MP, Alland S, Martin ME, Isborn CM. Molecular dynamics simulations of alkaline earth metal ions binding to DNA reveal ion size and hydration effects. Phys Chem Chem Phys 2020; 22:5584-5596. [DOI: 10.1039/c9cp06844a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Classical molecular dynamics simulations reveal size-dependent trends of alkaline earth metal ions binding to DNA are due to ion size and hydration behavior.
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Affiliation(s)
| | - Serra Alland
- Department of Chemistry and Biochemistry
- University of Central Arkansas
- Arkansas 72035
- USA
| | - Madison E. Martin
- Department of Chemistry and Biochemistry
- University of Central Arkansas
- Arkansas 72035
- USA
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27
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Migliorati V, Caruso A, D’Angelo P. Unraveling the Hydration Properties of the Ba2+ Aqua Ion: the Interplay of Quantum Mechanics, Molecular Dynamics, and EXAFS Spectroscopy. Inorg Chem 2019; 58:14551-14559. [DOI: 10.1021/acs.inorgchem.9b02204] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Valentina Migliorati
- Dipartimento di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
| | - Alessandro Caruso
- Dipartimento di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
| | - Paola D’Angelo
- Dipartimento di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy
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28
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Lynes O, Austin J, Kerridge A. Ab initio molecular dynamics studies of hydroxide coordination of alkaline earth metals and uranyl. Phys Chem Chem Phys 2019; 21:13809-13820. [PMID: 31210212 DOI: 10.1039/c9cp00142e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ab initio molecular dynamics (AIMD) simulations of the Mg2+, Ca2+, Sr2+ and UO22+ ions in either a pure aqueous environment or an environment containing two hydroxide ions have been carried out at the density functional level of theory, employing the generalised gradient approximation via the PBE exchange-correlation functional. Calculated mean M-O bond lengths in the first solvation shell of the aquo systems compared very well to existing experimental and computational literature, with bond lengths well within values measured previously and coordination numbers in line with previously calculated values. When applied to systems containing additional hydroxide ions, the methodology revealed increased bond lengths in all systems. Proton transfer events (PTEs) were recorded and were found to be most prevalent in the strontium hydroxide systems, likely due to the low charge density of the ion and the consequent lack of hydroxide coordination. For all alkaline earths, intrashell PTEs which occurred outside of the first solvation shell were most prevalent. Only three PTEs were identified in the entire simulation data of the uranium dihydroxide system, indicating the clear impact of the increased charge density of the hexavalent uranium ion on the strength of metal-oxygen bonds in aqueous solution. Broadly, systems containing more charge dense ions were found to exhibit fewer PTEs than those containing ions of lower charge density.
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Affiliation(s)
- Olivia Lynes
- Department of Chemistry, Faraday Building, Lancaster University, Lancaster, LA1 4YB, UK.
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29
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Insight into the roles of two typical ion clusters and their second hydration shells: Implication for the nucleation mechanism in MgSO4 aqueous solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Migliorati V, Filipponi A, Sessa F, Lapi A, Serva A, D'Angelo P. Solvation structure of lanthanide(iii) bistriflimide salts in acetonitrile solution: a molecular dynamics simulation and EXAFS investigation. Phys Chem Chem Phys 2019; 21:13058-13069. [DOI: 10.1039/c9cp01417a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Lanthanide3+ ions in acetonitrile solutions of bistriflimide salts form 10-fold coordination complexes composed of both solvent molecules and counterions
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Affiliation(s)
| | - Adriano Filipponi
- Dipartimento di Scienze Fisiche e Chimiche
- Università degli Studi dell’Aquila, Via Vetoio
- 67100 L’Aquila
- Italy
| | - Francesco Sessa
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Andrea Lapi
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
- Istituto CNR di Metodologie Chimiche-IMC
| | - Alessandra Serva
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Paola D'Angelo
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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31
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32
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Lacroix MR, Bukovsky EV, Lozinšek M, Folsom TC, Newell BS, Liu Y, Peryshkov DV, Strauss SH. Manifestations of Weak O-H···F Hydrogen Bonding in M(H 2O) n(B 12F 12) Salt Hydrates: Unusually Sharp Fourier Transform Infrared ν(OH) Bands and Latent Porosity (M = Mg-Ba, Co, Ni, Zn). Inorg Chem 2018; 57:14983-15000. [PMID: 30444604 DOI: 10.1021/acs.inorgchem.8b02786] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Eight M(H2O) n(Z) salt hydrates were characterized by single-crystal X-ray diffraction (Z2- = B12F122-): M = Ca, Sr, n = 7; M = Mg, Co, Ni, Zn, n = 6; M = Ba, n = 4, 5. Weak O-H···F hydrogen bonding between the M(H2O) n2+ cations and Z2- resulted in room-temperature Fourier transform infrared (FTIR) spectra having sharp ν(OH) bands, with full widths at half max of 10-30 cm-1, which are much more narrow than ν(OH) bands in room temperature FTIR spectra of most salt hydrates. Clearly resolved νasym(OH/OD) and νsym(OH/OD) bands with Δν(OH) as small as 17 cm-1 and Δν(OD) as small as 11 cm-1 were observed (Δν(OX) = νasym(OX) - νsym(OX)). The isomorphic hexahydrates ( R3̅) have two fac-(H2O)3 sets of H2O ligands and nearly octahedral coordination spheres. They exhibited four resolvable ν(OH) bands, one νasym(OH)/νsym(OH) pair for H2O ligands with longer O(H)···F distances and one νasym(OH)/νsym(OH) pair for H2O ligands with shorter O(H)···F distances. The ν(OH) bands for the three H2O molecules with shorter, slightly stronger O(H)···F hydrogen bonds were broader, more intense, and red-shifted by ca. 25 cm-1 relative to the bands for the three other H2O molecules, the first time that such small differences in relatively weak O(H)···F hydrogen bonds in the same crystalline hexahydrate have resulted in observable IR spectroscopic differences at room temperature. For the first time room temperature ν(OH) values for salt hexahydrates showed the monotonic progression Mg2+ > Co2+ > Ni2+ > Zn2+, essentially the same progression as the p Ka values for these metal ions in aqueous solution. A further manifestation of the weak O-H···F hydrogen bonding in these hydrates is the latent porosity exhibited by Ba(H2O)5,8(Z), Sr(H2O) n,m(Z), and Ca(H2O)4,6(Z). Finally, the H2O/D2O exchange reaction Co(D2O)6(Z) → Co(H2O)6(Z) was ca. 50% complete in 1 h at 50 °C in N2/17 Torr H2O( g).
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Affiliation(s)
- Matthew R Lacroix
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Eric V Bukovsky
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Matic Lozinšek
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States.,Department of Inorganic Chemistry and Technology , Jožef Stefan Institute , 1000 Ljubljana , Slovenia
| | - Travis C Folsom
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Brian S Newell
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Yong Liu
- Department of Chemistry , University of Colorado at Denver , Denver , Colorado 80000 , United States
| | - Dmitry V Peryshkov
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States.,Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Steven H Strauss
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
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33
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Sessa F, Migliorati V, Lapi A, D’Angelo P. Ce3+ and La3+ ions in ethylammonium nitrate: A XANES and molecular dynamics investigation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.06.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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34
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Naleem N, Bentenitis N, Smith PE. A Kirkwood-Buff derived force field for alkaline earth halide salts. J Chem Phys 2018; 148:222828. [PMID: 29907021 DOI: 10.1063/1.5019454] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The activity and function of many macromolecules in cellular environments are coupled with the binding of divalent ions such as calcium or magnesium. In principle, computer simulations can be used to understand the molecular level aspects of how many important macromolecules interact with ions. However, most of the force fields currently available often fail to accurately reproduce the properties of divalent ions in aqueous environments. Here we develop classical non-polarizable force fields for the aqueous alkaline earth metal halides (MX2), where M = Mg2+, Ca2+, Sr2+, Ba2+ and X = Cl-, Br-, I-, which can be used in bimolecular simulations and which are compatible with the Simple Point Charge/Extended (SPC/E) water model. The force field parameters are specifically developed to reproduce the experimental Kirkwood-Buff integrals for aqueous solutions and thereby the experimental activity derivatives, partial molar volumes, and excess coordination numbers. This ensures that a reasonable balance between ion-ion, ion-water, and water-water distributions is obtained. However, this requires a scaling of the cation to water oxygen interaction strength in order to accurately reproduce the integrals. The scaling factors developed for chloride salts are successfully transferable to the bromide and iodide salts. Use of these new models leads to reasonable diffusion constants and dielectric decrements. However, the performance of the models decreases with increasing salt concentration (>4m), and simulations of the pure crystals exhibited unstable behavior.
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Affiliation(s)
- Nawavi Naleem
- Department of Chemistry, Kansas State University, 213 CBC Building, 1212 Mid Campus Dr. North, Manhattan, Kansas 66506-0401, USA
| | - Nikolaos Bentenitis
- Department of Chemistry, Kansas State University, 213 CBC Building, 1212 Mid Campus Dr. North, Manhattan, Kansas 66506-0401, USA
| | - Paul E Smith
- Department of Chemistry, Kansas State University, 213 CBC Building, 1212 Mid Campus Dr. North, Manhattan, Kansas 66506-0401, USA
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35
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Ashworth H, Abrahamsen-Mills L, Bryan N, Foster L, Lloyd JR, Kellet S, Heath S. Effect of humic acid & bacterial exudates on sorption-desorption interactions of 90Sr with brucite. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:956-964. [PMID: 29774347 DOI: 10.1039/c8em00073e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
One of the nuclear fuel storage ponds at Sellafield (United Kingdom) is open to the air, and has contained a significant inventory of corroded magnox fuel and sludge for several decades. As a result, some fission products have also been released into solution. 90Sr is known to constitute a small mass of the radionuclides present in the pond, but due to its solubility and activity, it is at risk of challenging effluent discharge limits. The sludge is predominantly composed of brucite (Mg(OH)2), and organic molecules are known to be present in the pond liquor with occasional algal blooms restricting visibility. Understanding the chemical interactions of these components is important to inform ongoing sludge retrievals and effluent management. Additionally, interactions of radionuclides with organics at high pH will be an important consideration for the evolution of cementitious backfilled disposal sites in the UK. Batch sorption-desorption experiments were performed with brucite, 90Sr and natural organic matter (NOM) (humic acid (HA) and Pseudanabaena catenata cyanobacterial growth supernatant) in both binary and ternary systems at high pH. Ionic strength, pH and order of addition of components were varied. 90Sr was shown not to interact strongly with the bulk brucite surface in binary systems under pH conditions relevant to the pond. HA in both binary and ternary systems demonstrated a strong affinity for the brucite surface. Ternary systems containing HA demonstrated enhanced sorption of 90Sr at pH 11.5 and vice versa, likely via formation of strontium-humate complexes regardless of the order of addition of components. The distribution coefficients show HA sorption to be reversible at all pH values studied, and it appeared to control 90Sr behaviour at pH 11.5. Ternary systems containing cyanobacterial supernatant demonstrated a difference in 90Sr behaviour when the culture had been subjected to irradiation in the first stages of its growth.
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Affiliation(s)
- Hollie Ashworth
- Centre for Radiochemistry Research, School of Chemistry, University of Manchester, M13 9PL, UK
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36
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Nada H. A New Methodology for Evaluating the Structural Similarity between Different Phases Using a Dimensionality Reduction Technique. ACS OMEGA 2018; 3:5789-5798. [PMID: 31458779 PMCID: PMC6642035 DOI: 10.1021/acsomega.8b00401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/11/2018] [Indexed: 05/03/2023]
Abstract
A new methodology for definitively evaluating the structural similarity between different phases in an impartial manner is proposed. This methodology utilizes a dimensionality reduction (DR) technique that was developed in the fields of machine learning and statistics. The basis of the proposed methodology is that the structural similarity between different phases can be evaluated by the geometrical similarity of pair and/or angular distribution functions that reflect the atomic-scale structure of each phase. The DR technique is used for the analysis of this geometrical similarity. In this study, the proposed methodology is applied to evaluate the similarity in the atomic-scale structure, as obtained from molecular dynamics simulations, between amorphous CaCO3 and CaCO3 crystal phases in the presence or absence of additives, namely, Mg2+ ions, Sr2+ ions, and water molecules. The results indicate that in the absence of additives, the structure of the amorphous phase is closer to that of vaterite than to those of calcite or aragonite. However, the degree of structural similarity between the amorphous phase and vaterite decreases if Mg2+ ions are present. This tendency is also evident when Sr2+ ions are present, although these ions do not influence the structure of the amorphous phase as strongly as Mg2+ ions. In addition, the results indicate that at a high water concentration, the amorphous phase is separated into small particles by hydrogen-bonded networks of water molecules and the structure of the amorphous phase more closely approaches that of vaterite. The proposed methodology is widely applicable to the evaluation of the structural similarity between different phases for complex multicomponent systems.
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37
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Ab Initio Investigation of the Micro-species in [CaCl2(H2O)n = 0–12] and Their Raman Spectra. J CLUST SCI 2018. [DOI: 10.1007/s10876-018-1361-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Migliorati V, Serva A, Sessa F, Lapi A, D’Angelo P. Influence of Counterions on the Hydration Structure of Lanthanide Ions in Dilute Aqueous Solutions. J Phys Chem B 2018; 122:2779-2791. [DOI: 10.1021/acs.jpcb.7b12571] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Valentina Migliorati
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Alessandra Serva
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Francesco Sessa
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Andrea Lapi
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
- Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Paola D’Angelo
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy
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39
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Biriukov D, Kroutil O, Předota M. Modeling of solid–liquid interfaces using scaled charges: rutile (110) surfaces. Phys Chem Chem Phys 2018; 20:23954-23966. [DOI: 10.1039/c8cp04535f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The first application of the electronic continuum correction model with scaled charges to molecular dynamics simulations of solid–liquid interfaces.
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Affiliation(s)
- Denys Biriukov
- Institute of Physics
- Faculty of Science
- University of South Bohemia
- České Budějovice
- Czech Republic
| | - Ondřej Kroutil
- Institute of Physics
- Faculty of Science
- University of South Bohemia
- České Budějovice
- Czech Republic
| | - Milan Předota
- Institute of Physics
- Faculty of Science
- University of South Bohemia
- České Budějovice
- Czech Republic
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40
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Sessa F, Migliorati V, Serva A, Lapi A, Aquilanti G, Mancini G, D'Angelo P. On the coordination of Zn2+ ion in Tf2N− based ionic liquids: structural and dynamic properties depending on the nature of the organic cation. Phys Chem Chem Phys 2018; 20:2662-2675. [DOI: 10.1039/c7cp07497b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Zn2+ coordination structure changes when the Zn(Tf2N)2 salt is dissolved in ionic liquids resulting in more favorable interactions among solvent cations and anions.
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Affiliation(s)
- Francesco Sessa
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | | | - Alessandra Serva
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Andrea Lapi
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
- Istituto CNR di Metodologie Chimiche-IMC
| | | | | | - Paola D'Angelo
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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41
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Migliorati V, Filipponi A, Di Cicco A, De Panfilis S, D’Angelo P. Structure of Water in Zn2+ Aqueous Solutions from Ambient Conditions up to the Gigapascal Pressure Range: A XANES and Molecular Dynamics Study. Inorg Chem 2017; 56:14013-14022. [DOI: 10.1021/acs.inorgchem.7b02151] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Valentina Migliorati
- Dipartimento di
Chimica, Università di Roma “La Sapienza”, P.le
A. Moro 5, 00185 Roma, Italy
| | - Adriano Filipponi
- Dipartimento di Scienze
Fisiche e Chimiche, Università degli Studi dell’Aquila, Via Vetoio, 67100 L’Aquila, Italy
| | - Andrea Di Cicco
- Sezione di Fisica,
Scuola di Scienze e Tecnologie, Università di Camerino, 62032 Camerino (MC), Italy
| | - Simone De Panfilis
- Centre
for Life Nano Science - IIT@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, 00161 Rome, Italy
| | - Paola D’Angelo
- Dipartimento di
Chimica, Università di Roma “La Sapienza”, P.le
A. Moro 5, 00185 Roma, Italy
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42
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Spezia R, Migliorati V, D’Angelo P. On the development of polarizable and Lennard-Jones force fields to study hydration structure and dynamics of actinide(III) ions based on effective ionic radii. J Chem Phys 2017; 147:161707. [DOI: 10.1063/1.4989969] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Zhu F, Zhou H, Fang C, Fang Y, Zhou Y, Liu H. Ab Initio Investigation of the Microspecies and Energy in Hydrated Strontium Ion Clusters. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1382739] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Fayan Zhu
- Laboratory of Salt Resources and Chemistry, Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China
| | - Hongxia Zhou
- The Mechanical Engineering College, Qinghai University, Xining, P. R. China
| | - Chunhui Fang
- Laboratory of Salt Resources and Chemistry, Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China
| | - Yan Fang
- Laboratory of Salt Resources and Chemistry, Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China
| | - Yongquan Zhou
- Laboratory of Salt Resources and Chemistry, Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China
| | - Hongyan Liu
- Laboratory of Salt Resources and Chemistry, Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China
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44
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Kakutani Y, Weerachawanasak P, Hirata Y, Sano M, Suzuki T, Miyake T. Highly effective K-Merlinoite adsorbent for removal of Cs+ and Sr2+ in aqueous solution. RSC Adv 2017. [DOI: 10.1039/c7ra03867d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cs+ and Sr2+ removal using K-MER adsorbent.
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Affiliation(s)
- Yuki Kakutani
- Graduate School of Science and Engineering
- Environmental and Urban Major
- Kansai University
- Suita
- Japan
| | | | - Yoshiya Hirata
- Graduate School of Science and Engineering
- Environmental and Urban Major
- Kansai University
- Suita
- Japan
| | - Makoto Sano
- Graduate School of Science and Engineering
- Environmental and Urban Major
- Kansai University
- Suita
- Japan
| | - Toshimitsu Suzuki
- Graduate School of Science and Engineering
- Environmental and Urban Major
- Kansai University
- Suita
- Japan
| | - Takanori Miyake
- Graduate School of Science and Engineering
- Environmental and Urban Major
- Kansai University
- Suita
- Japan
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45
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Spanjers CS, Guillo P, Tilley TD, Janik MJ, Rioux RM. Identification of Second Shell Coordination in Transition Metal Species Using Theoretical XANES: Example of Ti–O–(C, Si, Ge) Complexes. J Phys Chem A 2016; 121:162-167. [DOI: 10.1021/acs.jpca.6b12197] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Pascal Guillo
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - T. Don Tilley
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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