1
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Tomaník L, Pugini M, Mudryk K, Thürmer S, Stemer D, Credidio B, Trinter F, Winter B, Slavíček P. Liquid-jet photoemission spectroscopy as a structural tool: site-specific acid-base chemistry of vitamin C. Phys Chem Chem Phys 2024; 26:19673-19684. [PMID: 38963770 DOI: 10.1039/d4cp01521e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Liquid-jet photoemission spectroscopy (LJ-PES) directly probes the electronic structure of solutes and solvents. It also emerges as a novel tool to explore chemical structure in aqueous solutions, yet the scope of the approach has to be examined. Here, we present a pH-dependent liquid-jet photoelectron spectroscopic investigation of ascorbic acid (vitamin C). We combine core-level photoelectron spectroscopy and ab initio calculations, allowing us to site-specifically explore the acid-base chemistry of the biomolecule. For the first time, we demonstrate the capability of the method to simultaneously assign two deprotonation sites within the molecule. We show that a large change in chemical shift appears even for atoms distant several bonds from the chemically modified group. Furthermore, we present a highly efficient and accurate computational protocol based on a single structure using the maximum-overlap method for modeling core-level photoelectron spectra in aqueous environments. This work poses a broader question: to what extent can LJ-PES complement established structural techniques such as nuclear magnetic resonance? Answering this question is highly relevant in view of the large number of incorrect molecular structures published.
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Affiliation(s)
- Lukáš Tomaník
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic.
| | - Michele Pugini
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Karen Mudryk
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Stephan Thürmer
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, 606-8502 Kyoto, Japan
| | - Dominik Stemer
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Bruno Credidio
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Florian Trinter
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Bernd Winter
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic.
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2
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Mudryk K, Lee C, Tomaník L, Malerz S, Trinter F, Hergenhahn U, Neumark DM, Slavíček P, Bradforth S, Winter B. How Does Mg 2+(aq) Interact with ATP (aq)? Biomolecular Structure through the Lens of Liquid-Jet Photoemission Spectroscopy. J Am Chem Soc 2024; 146:16062-16075. [PMID: 38802319 PMCID: PMC11177255 DOI: 10.1021/jacs.4c03174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/29/2024]
Abstract
Liquid-jet photoemission spectroscopy (LJ-PES) allows for a direct probing of electronic structure in aqueous solutions. We show the applicability of the approach to biomolecules in a complex environment, exploring site-specific information on the interaction of adenosine triphosphate in the aqueous phase (ATP(aq)) with magnesium (Mg2+(aq)), highlighting the synergy brought about by the simultaneous analysis of different regions in the photoelectron spectrum. In particular, we demonstrate intermolecular Coulombic decay (ICD) spectroscopy as a new and powerful addition to the arsenal of techniques for biomolecular structure investigation. We apply LJ-PES assisted by electronic-structure calculations to study ATP(aq) solutions with and without dissolved Mg2+. Valence photoelectron data reveal spectral changes in the phosphate and adenine features of ATP(aq) due to interactions with the divalent cation. Chemical shifts in Mg 2p, Mg 2s, P 2p, and P 2s core-level spectra as a function of the Mg2+/ATP concentration ratio are correlated to the formation of [Mg(ATP) 2]6-(aq), [MgATP]2-(aq), and [Mg2ATP](aq) complexes, demonstrating the element sensitivity of the technique to Mg2+-phosphate interactions. The most direct probe of the intermolecular interactions between ATP(aq) and Mg2+(aq) is delivered by the emerging ICD electrons following ionization of Mg 1s electrons. ICD spectra are shown to sensitively probe ligand exchange in the Mg2+-ATP(aq) coordination environment. In addition, we report and compare P 2s data from ATP(aq) and adenosine mono- and diphosphate (AMP(aq) and ADP(aq), respectively) solutions, probing the electronic structure of the phosphate chain and the local environment of individual phosphate units in ATP(aq). Our results provide a comprehensive view of the electronic structure of ATP(aq) and Mg2+-ATP(aq) complexes relevant to phosphorylation and dephosphorylation reactions that are central to bioenergetics in living organisms.
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Affiliation(s)
- Karen Mudryk
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Chin Lee
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Lukáš Tomaník
- Department
of Physical Chemistry, University of Chemistry
and Technology, Prague, Technická 5, Prague 6 16628, Czech Republic
| | - Sebastian Malerz
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Florian Trinter
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straße
1, 60438 Frankfurt
am Main, Germany
| | - Uwe Hergenhahn
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Daniel M. Neumark
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Petr Slavíček
- Department
of Physical Chemistry, University of Chemistry
and Technology, Prague, Technická 5, Prague 6 16628, Czech Republic
| | - Stephen Bradforth
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Bernd Winter
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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3
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Sajeev Y. Prebiotic chemical origin of biomolecular complementarity. Commun Chem 2023; 6:259. [PMID: 38012323 PMCID: PMC10681984 DOI: 10.1038/s42004-023-01060-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/10/2023] [Indexed: 11/29/2023] Open
Abstract
The early Earth, devoid of the protective stratospheric ozone layer, must have sustained an ambient prebiotic physicochemical medium intensified by the co-existence of shortwave UV photons and very low energy electrons (vLEEs). Consequently, only intrinsically stable molecules against these two co-existing molecular destructors must have proliferated and thereby chemically evolved into the advanced molecules of life. Based on this view, we examined the stability inherent in nucleobases and their complementary pairs as resistance to the molecular damaging effects of shortwave UV photons and vLEEs. This leads to the conclusion that nucleobases could only proliferated as their complementary pairs under the unfavorable prebiotic conditions on early Earth. The complementary base pairing not only enhances but consolidates the intrinsic stability of nucleobases against short-range UV photons, vLEEs, and possibly many as-yet-unknown deleterious agents co-existed in the prebiotic conditions of the early Earth. In short, complementary base pairing is a manifestation of chemical evolution in the unfavorable prebiotic medium created by the absence of the stratospheric ozone layer.
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Affiliation(s)
- Y Sajeev
- Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai, India.
- Homi Bhabha National Institute, Mumbai, India.
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4
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Gopakumar G, Unger I, Slavíček P, Hergenhahn U, Öhrwall G, Malerz S, Céolin D, Trinter F, Winter B, Wilkinson I, Caleman C, Muchová E, Björneholm O. Radiation damage by extensive local water ionization from two-step electron-transfer-mediated decay of solvated ions. Nat Chem 2023; 15:1408-1414. [PMID: 37620544 PMCID: PMC10533389 DOI: 10.1038/s41557-023-01302-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 07/21/2023] [Indexed: 08/26/2023]
Abstract
Biomolecular radiation damage is largely mediated by radicals and low-energy electrons formed by water ionization rather than by direct ionization of biomolecules. It was speculated that such an extensive, localized water ionization can be caused by ultrafast processes following excitation by core-level ionization of hydrated metal ions. In this model, ions relax via a cascade of local Auger-Meitner and, importantly, non-local charge- and energy-transfer processes involving the water environment. Here, we experimentally and theoretically show that, for solvated paradigmatic intermediate-mass Al3+ ions, electronic relaxation involves two sequential solute-solvent electron transfer-mediated decay processes. The electron transfer-mediated decay steps correspond to sequential relaxation from Al5+ to Al3+ accompanied by formation of four ionized water molecules and two low-energy electrons. Such charge multiplication and the generated highly reactive species are expected to initiate cascades of radical reactions.
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Affiliation(s)
- G Gopakumar
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - I Unger
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
- FS-BIG, DESY, Hamburg, Germany
| | - P Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - U Hergenhahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany
| | - G Öhrwall
- MAX IV Laboratory, Lund University, Lund, Sweden
| | - S Malerz
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany
| | - D Céolin
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, Paris, France
| | - F Trinter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany
- Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - B Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany
| | - I Wilkinson
- Institute for Electronic Structure Dynamics, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany
| | - C Caleman
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
| | - E Muchová
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Czech Republic.
| | - O Björneholm
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden.
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5
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Cao W, Wen H, Xantheas SS, Wang XB. The primary gas phase hydration shell of hydroxide. SCIENCE ADVANCES 2023; 9:eadf4309. [PMID: 36961895 PMCID: PMC10038337 DOI: 10.1126/sciadv.adf4309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The number of water molecules in hydroxide's primary hydration shell has been long debated to be three from the interpretation of experimental data and four from theoretical studies. Here, we provide direct evidence for the presence of a fourth water molecule in hydroxide's primary hydration shell from a combined study based on high-resolution cryogenic experimental photoelectron spectroscopy and high-level quantum chemical computations. Well-defined spectra of OH-(H2O)n clusters (n = 2 to 5) yield accurate electron binding energies, which are, in turn, used as key signatures of the underlying molecular conformations. Although the smaller OH-(H2O)3 and OH-(H2O)4 clusters adopt close-lying conformations with similar electron binding energies that are hard to distinguish, the OH-(H2O)5 cluster clearly has a predominant conformation with a four-coordinated hydroxide binding motif, a finding that unambiguously determines the gas phase coordination number of hydroxide to be four.
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Affiliation(s)
- Wenjin Cao
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Hui Wen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Laboratory of Atmospheric Physico-Chemistry, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Sotiris S. Xantheas
- Advanced Computing, Mathematics and Data Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Department of Chemistry, University of Washington, Seattle, WA 98195, USA
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
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6
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Faubel M. Early Microjet Experimentation with Liquid Water in Vacuum. Acc Chem Res 2023; 56:625-630. [PMID: 36719846 PMCID: PMC10035024 DOI: 10.1021/acs.accounts.2c00739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
ConspectusIn this brief look at the history of liquid microjets, I recollect some personal reminiscences on initial challenges for introduction of this method, as well as unexpected problems and exemplary results using this new tool for liquid evaporation and photoelectron spectroscopy studies.Many efficient and direct, atomic level diagnostic instruments in use at solid state surfaces and in gas-phase atom or cluster studies require high vacuum. They have therefore not been applied to investigations of aqueous solutions because liquid water both strongly evaporates and rapidly freezes in vacuum. Only fairly recently, over the past three decades, have liquid microjets been considered as practicable targets for research on liquid-water interfaces in vacuum. The working principle is analogous to the functioning of a free molecular beam source, where molecules enter through a small aperture into a vacuum without being disturbed by subsequent collisions in their original Maxwellian velocity distribution. Similarly, above a microjet surface in vacuum, water vapor molecules do not interact with each other, or with different probe particles, as long as the liquid jet diameter is small in relation to the mean free path of the liquids' vapor at equilibrium conditions. For pure liquid water, this constraint is Djet < λvap < 10 μm for 6.1 mbar vapor pressure at the triple point of water. A high streaming velocity of the liquid jet, >50 m/s, delays freezing and exposes a steadily renewed fresh vacuum surface for experiments.For experimental verification of the microjet free surface concept, H2O vapor velocities were measured in a molecular beam time-of-flight experiment. These studies showed Maxwellian velocity distributions with the expected local water-jet temperatures for 5 and 10 μm jets, whereas larger liquid jet diameters of 50 μm exhibit narrowed vapor velocity profiles. This narrowing is the known signature of incipient, collision dominated, supersonic hydrodynamic expansions in nozzle beam sources. As a completely unexpected new result in evaporation studies of carboxylic acid solutions, freely evaporating acetic acid dimers showed apparent non-equilibrium liquid surface source temperatures several hundred kelvin above the simultaneously measured monomer temperatures, a phenomenon shown to be correlated with surface tension.Continuing with improvements, the vacuum water microjets were implemented inside a photoelectron spectroscopy apparatus that was modified for handling large amounts of water vapor. After initial complications with liquid jet charging phenomena, the first partial liquid-water photoelectron spectra were recorded using 21 eV photons from a He I discharge lamp. In the next step, the equipment was taken to a synchrotron radiation beamline at BESSY II, resulting in substantial improvements of signal intensity and in photon tunability for narrow band monochromatic soft X-rays up to 1 keV. Two early examples of these continuing experiments are considered, briefly, for aqueous alkali halide salt solutions and for the pH-value dependent protonation of an NH2/NH3+ group in an amino acid directly in a photoelectron spectrum of a solution.In conclusion, liquid microjets have opened up a completely new approach to studies of arbitrary liquids with chemical and biological relevance.
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Affiliation(s)
- Manfred Faubel
- Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37077 Göttingen, Germany
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7
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Skitnevskaya AD, Gokhberg K, Trofimov AB, Grigoricheva EK, Kuleff AI, Cederbaum LS. Two-Sided Impact of Water on the Relaxation of Inner-Valence Vacancies of Biologically Relevant Molecules. J Phys Chem Lett 2023; 14:1418-1426. [PMID: 36731025 DOI: 10.1021/acs.jpclett.2c03654] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
After ionization of an inner-valence electron of molecules, the resulting cation-radicals store substantial internal energy which, if sufficient, can trigger ejection of an additional electron in an Auger decay usually followed by molecule fragmentation. In the environment, intermolecular Coulombic decay (ICD) and electron-transfer mediated decay (ETMD) are also operative, resulting in one or two electrons being ejected from a neighbor, thus preventing the fragmentation of the initially ionized molecule. These relaxation processes are investigated theoretically for prototypical heterocycle-water complexes of imidazole, pyrrole, and pyridine. It is found that the hydrogen-bonding site of the water molecule critically influences the nature and energetics of the electronic states involved, opening or closing certain relaxation processes of the inner-valence ionized system. Our results indicate that the relaxation mechanisms of biologically relevant systems with inner-valence vacancies on their carbon atoms can strongly depend on the presence of the electron-density donating or accepting neighbor, either water or another biomolecule.
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Affiliation(s)
- Anna D Skitnevskaya
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - Kirill Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - Alexander B Trofimov
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
- Favorsky's Institute of Chemistry, SB RAS, Favorsky Str. 1, 664033 Irkutsk, Russia
| | - Emma K Grigoricheva
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - Alexander I Kuleff
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
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8
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Liu J, Liu R, Cao Y, Chen M. Solvation structures of calcium and magnesium ions in water with the presence of hydroxide: a study by deep potential molecular dynamics. Phys Chem Chem Phys 2023; 25:983-993. [PMID: 36519362 DOI: 10.1039/d2cp04105g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
The solvation structures of calcium (Ca2+) and magnesium (Mg2+) ions with the presence of hydroxide (OH-) ion in water are essential for understanding their roles in biological and chemical processes but have not been fully explored. Ab initio molecular dynamics (AIMD) is an important tool to address this issue, but two challenges exist. First, an accurate description of OH- from AIMD needs an appropriate exchange-correlation functional. Second, a long trajectory is needed to reach an equilibrium state for the Ca2+-OH- and Mg2+-OH- ion pairs in aqueous solutions. Herein, we adopt a deep potential molecular dynamics (DPMD) method to simulate 1 ns trajectories for the Ca2+-OH- and Mg2+-OH- ion pairs in water; the DPMD method provides efficient machine-learning-based models that have the accuracy of the SCAN exchange-correlation functional within the framework of density functional theory. The solvation structures of the cations and the OH- in terms of three different species have been systematically investigated. On the one hand, we find that OH- have more significant effects on the solvation structure of Ca2+ than that of Mg2+. We observe that the OH- substantially affects the orientation angles of water molecules surrounding the cation. Through the time correlation functions, we conclude that the water molecules in the first solvation shell of Ca2+ change their preferred orientation faster than those of Mg2+. On the other hand, with the presence of the cation in the first solvation shell of OH-, we find that the hydrogen bonds of OH- are severely altered, and the adjacent water molecules of OH- are squeezed. The two cations have substantially different effects on the solvation structure of OH-. Our work provides new insight into the solvation structures of Ca2+ and Mg2+ in water with the presence of OH-.
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Affiliation(s)
- Jianchuan Liu
- HEDPS, CAPT, College of Engineering and School of Physics, Peking University, Beijing, 100871, China.
| | - Renxi Liu
- HEDPS, CAPT, College of Engineering and School of Physics, Peking University, Beijing, 100871, China. .,Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Yu Cao
- HEDPS, CAPT, College of Engineering and School of Physics, Peking University, Beijing, 100871, China.
| | - Mohan Chen
- HEDPS, CAPT, College of Engineering and School of Physics, Peking University, Beijing, 100871, China. .,Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
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9
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Li Y, Chen YX, Liu ZF. OH -···Au Hydrogen Bond and Its Effect on the Oxygen Reduction Reaction on Au(100) in Alkaline Media. J Phys Chem Lett 2022; 13:9035-9043. [PMID: 36150066 DOI: 10.1021/acs.jpclett.2c02774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Using ab initio molecular dynamics simulations with fully solvated ions, we demonstrate that solvated OH- forms a stable hydrogen bond with Au(100). Unlike the hydrogen bond between H2O and Au reported previously, which is more favorable for negatively charged Au, the OH-···Au interaction is stabilized when a small positive charge is added to the metal slab. For electro-catalysis, this means that while OH2···Au plays a significant role in the hydrogen evolution reaction, OH-···Au could be a significant factor in the oxygen reduction reaction in alkaline media. It also points to a fundamental difference in the mechanism of oxygen reduction between gold and platinum electrodes.
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Affiliation(s)
- Yuke Li
- Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin 999077, Hong Kong, China
| | - Yan-Xia Chen
- Hefei National Research Center for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Zhi-Feng Liu
- Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin 999077, Hong Kong, China
- CUHK Shenzhen Research Institute, No. 10, 2nd Yuexing Road, Nanshan District, Shenzhen 518057, China
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10
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Spanedda N, McLaughlin PF, Beyer JJ, Chakraborty A. Investigation of Ionization Potential in Quantum Dots Using the Stratified Stochastic Enumeration of Molecular Orbitals Method. J Chem Theory Comput 2022; 18:5920-5935. [PMID: 36136935 PMCID: PMC9558315 DOI: 10.1021/acs.jctc.2c00329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The overarching goal of this work is to investigate the size-dependent characteristics of the ionization potential of PbS and CdS quantum dots. The ionization potentials of quantum dots provide critical information about the energies of occupied states, which can then be used to quantify the electron-removal characteristics of quantum dots. The energy of the highest-occupied molecular orbital is used to understand electron-transfer processes when invesigating the energy-level alignment between quantum dots and electron-accepting ligands. Ionization potential is also important for investigating and interpreting electron-detachment processes induced by light (photoelectron spectra), external voltage (chemiresistance), and collision with other electrons (impact ionization). Accurate first-principles calculations of ionization potential continue to be challenging because of the computational cost associated with the construction of the frequency-dependent self-energy operator and the numerical solution of the associated Dyson equation. The computational cost becomes prohibitive as the system size increases because of the large number of 2particle-1hole (2p1h) and 1particle-2hole (1p2h) terms needed for the calculation. In this work, we present the Stratified Stochastic Enumeration of Molecular Orbitals (SSE-MO) method for efficient construction of the self-energy operator. The SSE-MO method is a real-space method and the central strategy of this method is to use stochastically enumerated sampling of molecular orbitals and molecular-orbital indices for the construction of the 2p1h and 1p2h terms. This is achieved by first constructing a composite MO-index Cartesian coordinate space followed by transformation of the frequency-dependent self-energy operator to this composite space. The evaluation of both the real and imaginary components of the self-energy operator is performed using a stratified Monte Carlo technique. The SSE-MO method was used to calculate the ionization potentials and the frequency-dependent spectral functions for a series of PbS and CdS quantum dots by solving the Dyson equation using both single-shot and iterative procedures. The ionization potentials for both PbS and CdS quantum dots were found to decrease with increasing dot size. Analysis of the frequency-dependent spectral functions revealed that for PbS quantum dots the intermediate dot size exhibited a longer relative lifetime whereas in CdS the smallest dot size had the longest relative lifetime. The results from these calculations demonstrate the efficacy of the SSE-MO method for calculating accurate ionization potentials and spectral functions of chemical systems.
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Affiliation(s)
- Nicole Spanedda
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Peter F McLaughlin
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Jessica J Beyer
- Keck Science Department, Scripps College, Claremont, California 91711, United States
| | - Arindam Chakraborty
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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11
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Martínez AG, Gómez PC, de la Moya S, Siehl HU. Structural proton transfer rates in pure water according to Marcus theory and TD-DFT computations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Zhang P, Perry C, Luu TT, Matselyukh D, Wörner HJ. Intermolecular Coulombic Decay in Liquid Water. PHYSICAL REVIEW LETTERS 2022; 128:133001. [PMID: 35426704 DOI: 10.1103/physrevlett.128.133001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
We report the first observation of intermolecular Coulombic decay (ICD) in liquid water following inner-valence ionization. By combining a monochromatized tabletop high-harmonic source with a liquid microjet, we record electron-electron coincidence spectra at two photon energies that identify the ICD electrons, together with the photoelectrons originating from the 2a_{1} inner-valence band of liquid water. Our results confirm the importance of ICD as a source of low-energy electrons in bulk liquid water and provide quantitative results for modeling the velocity distribution of the slow electrons that are thought to dominate radiation damage in aqueous environments.
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Affiliation(s)
- Pengju Zhang
- Laboratory for Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Conaill Perry
- Laboratory for Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Tran Trung Luu
- Laboratory for Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
- Department of Physics, The University of Hong Kong, Pokfulam Road, SAR Hong Kong, People's Republic of China
| | - Danylo Matselyukh
- Laboratory for Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Hans Jakob Wörner
- Laboratory for Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
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13
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Trinter F, Miteva T, Weller M, Hartung A, Richter M, Williams JB, Gatton A, Gaire B, Sartor J, Landers AL, Berry B, Ben-Itzhak I, Sisourat N, Stumpf V, Gokhberg K, Dörner R, Jahnke T, Weber T. Ultrafast temporal evolution of interatomic Coulombic decay in NeKr dimers. Chem Sci 2022; 13:1789-1800. [PMID: 35282626 PMCID: PMC8827086 DOI: 10.1039/d1sc04630f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 12/28/2021] [Indexed: 11/21/2022] Open
Abstract
We investigate interatomic Coulombic decay in NeKr dimers after neon inner-valence photoionization [Ne+(2s-1)] using a synchrotron light source. We measure with high energy resolution the two singly charged ions of the Coulomb-exploding dimer dication and the photoelectron in coincidence. By carefully tracing the post-collision interaction between the photoelectron and the emitted ICD electron we are able to probe the temporal evolution of the state as it decays. Although the ionizing light pulses are 80 picoseconds long, we determine the lifetime of the intermediate dimer cation state and visualize the contraction of the nuclear structure on the femtosecond time scale.
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Affiliation(s)
- F Trinter
- Institut für Kernphysik, Goethe-Universität 60438 Frankfurt am Main Germany .,Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft 14195 Berlin Germany
| | - T Miteva
- Laboratoire de Chimie Physique Matière et Rayonnement, UMR 7614, Sorbonne Université, CNRS 75005 Paris France
| | - M Weller
- Institut für Kernphysik, Goethe-Universität 60438 Frankfurt am Main Germany .,Lawrence Berkeley National Laboratory, Chemical Sciences Division Berkeley California 94720 USA
| | - A Hartung
- Institut für Kernphysik, Goethe-Universität 60438 Frankfurt am Main Germany
| | - M Richter
- Institut für Kernphysik, Goethe-Universität 60438 Frankfurt am Main Germany
| | - J B Williams
- Department of Physics, University of Nevada Reno Nevada 89557 USA
| | - A Gatton
- Lawrence Berkeley National Laboratory, Chemical Sciences Division Berkeley California 94720 USA .,Department of Physics, Auburn University Auburn Alabama 36849 USA
| | - B Gaire
- Lawrence Berkeley National Laboratory, Chemical Sciences Division Berkeley California 94720 USA
| | - J Sartor
- Department of Physics, Auburn University Auburn Alabama 36849 USA
| | - A L Landers
- Department of Physics, Auburn University Auburn Alabama 36849 USA
| | - B Berry
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University Manhattan Kansas 66506 USA
| | - I Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University Manhattan Kansas 66506 USA
| | - N Sisourat
- Laboratoire de Chimie Physique Matière et Rayonnement, UMR 7614, Sorbonne Université, CNRS 75005 Paris France
| | - V Stumpf
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg 69120 Heidelberg Germany
| | - K Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg 69120 Heidelberg Germany
| | - R Dörner
- Institut für Kernphysik, Goethe-Universität 60438 Frankfurt am Main Germany
| | - T Jahnke
- European XFEL GmbH 22869 Schenefeld Germany
| | - T Weber
- Lawrence Berkeley National Laboratory, Chemical Sciences Division Berkeley California 94720 USA
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14
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Hans A, Schmidt P, Küstner-Wetekam C, Trinter F, Deinert S, Bloß D, Viehmann JH, Schaf R, Gerstel M, Saak CM, Buck J, Klumpp S, Hartmann G, Cederbaum LS, Kryzhevoi NV, Knie A. Suppression of X-ray-Induced Radiation Damage to Biomolecules in Aqueous Environments by Immediate Intermolecular Decay of Inner-Shell Vacancies. J Phys Chem Lett 2021; 12:7146-7150. [PMID: 34297572 DOI: 10.1021/acs.jpclett.1c01879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The predominant reason for the damaging power of high-energy radiation is multiple ionization of a molecule, either direct or via the decay of highly excited intermediates, as, e.g., in the case of X-ray irradiation. Consequently, the molecule is irreparably damaged by the subsequent fragmentation in a Coulomb explosion. In an aqueous environment, however, it has been observed that irradiated molecules may be saved from fragmentation presumably by charge and energy dissipation mechanisms. Here, we show that the protective effect of the environment sets in even earlier than hitherto expected, namely immediately after single inner-shell ionization. By combining coincidence measurements of the fragmentation of X-ray-irradiated microsolvated pyrimidine molecules with theoretical calculations, we identify direct intermolecular electronic decay as the protective mechanism, outrunning the usually dominant Auger decay. Our results demonstrate that such processes play a key role in charge delocalization and have to be considered in investigations and models on high-energy radiation damage in realistic environments.
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Affiliation(s)
- Andreas Hans
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Philipp Schmidt
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Catmarna Küstner-Wetekam
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Florian Trinter
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4, 14195 Berlin, Germany
| | - Sascha Deinert
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Dana Bloß
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Johannes H Viehmann
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Rebecca Schaf
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Miriam Gerstel
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Clara M Saak
- Molecular and Condensed Matter Physics Division, Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
| | - Jens Buck
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Stephan Klumpp
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Gregor Hartmann
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein-Straße 15, 12489 Berlin, Germany
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Nikolai V Kryzhevoi
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - André Knie
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
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15
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Wang Y, Maity N, Zhao L, Krämer M, Hasegawa JY, Shichibu Y, Konishi K, Wang X, Song Z, Bando M, Nakano T. A Triad Fluorenone Derivative Bearing Two Imidazole Groups That Switches between Three States by Base and Acid Stimuli. CHEM LETT 2021. [DOI: 10.1246/cl.210112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuting Wang
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Nabin Maity
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Liming Zhao
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Maximilian Krämer
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Jun-ya Hasegawa
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Integrated Research Consortium on Chemical Sciences (IRCCS), Institute for Catalysis, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Yukatsu Shichibu
- Faculty of Environmental Earth Sciences, Hokkaido University, N10 W5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Katsuaki Konishi
- Faculty of Environmental Earth Sciences, Hokkaido University, N10 W5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Xiaoyuan Wang
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Zhiyi Song
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Masayoshi Bando
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Tamaki Nakano
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Integrated Research Consortium on Chemical Sciences (IRCCS), Institute for Catalysis, Hokkaido University, N21 W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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16
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Sakhonenkov S, Konashuk A, Brykalova X, Cherny A, Kornilov N, Rykov Y, Filatova E, Pavlychev A. Nanostructure of bone tissue probed with Ca 2p and O 1s NEXAFS spectroscopy. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/abf3a5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
X-ray absorption spectroscopy is applied to investigate relationships between hierarchical organization of the skeleton and nanostructure of femoral bone in knee compartments and to understand the osteoarthritis (OA) related changes at the subcellular level. Our focus is on local electronic and atomic and molecular architectonics of the medial and lateral condyles of the femur resected during total knee arthroplasty in patients with medial compartmental knee OA. The element-specific and site-dependent peculiarities in spectral distributions of oscillator strength for core-to-valence transitions are revealed. The near Ca 2p and O 1s edges x-ray absorption fine structure (Ca 2p and O 1s NEXAFS) spectra of the saw cuts demonstrate substantial redistributions in intact and OA damaged areas on the proximal side, and on the proximal and distal sides of the samples. Examining the O 1s NEXAFS spectra new chemical bonds are revealed on the proximal surface in the OA areas. Strong intra-atomic intershell Ca2+ 2
p
3
/
2
,
1
/
2
5
3
d
1
interaction specifies the great similarity of the Ca 2p NEXAFS spectra. Their analysis performed in combination with the x-ray photoelectron data has demonstrated the formation of non-apatite calcium in the OA areas of the samples. It is shown that NEXAFS spectroscopy is a powerful tool for deeper understanding relationship between hierarchical skeletal organization and nanostructure of native bone. Perspectives for development of novel methods for medical imaging and diagnosis of subchondral bone at the nanolevel are discussed.
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17
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Jones BM, Hu H, Alexsandrov A, Smith W, Clark AE, Li X, Orlando TM. Efficient Intermolecular Energy Exchange and Soft Ionization of Water at Nanoplatelet Interfaces. J Phys Chem Lett 2020; 11:10088-10093. [PMID: 33179936 DOI: 10.1021/acs.jpclett.0c02911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
X-ray, energetic photon, and electron irradiation can ionize and electronically excite target atoms and molecules. These excitations undergo complicated relaxation and energy-transfer processes that ultimately determine the manifold system responses to the deposited excess energy. In weakly bound gas- and solution-phase samples, intermolecular Coulomb decay (ICD) and electron-transfer-mediated decay (ETMD) can occur with neighboring atoms or molecules, leading to efficient transfer of the excess energy to the surroundings. In ionic solids such as metal oxides, intra- and interatomic Auger decay produces localized final states that lead to lattice damage and typically the removal of cations from the substrate. The relative importance of Auger-stimulated damage (ASD) versus ICD and ETMD in microsolvated nanoparticle interfaces is not known. Though ASD is generally expected, essentially no lattice damage resulting from the ionization and electronic excitation of microsolvated boehmite (AlOOH) nanoplatelets has been detected. Rather efficient energy transfer and soft ionization of interfacial water molecules has been observed. This is likely a general phenomenon at gas-oxyhydroxide nanoparticle interfaces where the density of states of the ionized chemisorbed species significantly overlaps with the core hole states of the solid.
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Affiliation(s)
| | - Hang Hu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | | | - William Smith
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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18
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Jahnke T, Hergenhahn U, Winter B, Dörner R, Frühling U, Demekhin PV, Gokhberg K, Cederbaum LS, Ehresmann A, Knie A, Dreuw A. Interatomic and Intermolecular Coulombic Decay. Chem Rev 2020; 120:11295-11369. [PMID: 33035051 PMCID: PMC7596762 DOI: 10.1021/acs.chemrev.0c00106] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay mechanism occurring in weakly bound matter. In an ICD process, energy released by electronic relaxation of an excited atom or molecule leads to ionization of a neighboring one via Coulombic electron interactions. ICD has been predicted theoretically in the mid nineties of the last century, and its existence has been confirmed experimentally approximately ten years later. Since then, a number of fundamental and applied aspects have been studied in this quickly growing field of research. This review provides an introduction to ICD and draws the connection to related energy transfer and ionization processes. The theoretical approaches for the description of ICD as well as the experimental techniques developed and employed for its investigation are described. The existing body of literature on experimental and theoretical studies of ICD processes in different atomic and molecular systems is reviewed.
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Affiliation(s)
- Till Jahnke
- Institut für Kernphysik, Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - Uwe Hergenhahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.,Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany.,Leibniz Institute of Surface Engineering (IOM), 04318 Leipzig, Germany
| | - Bernd Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - Ulrike Frühling
- Institut für Experimentalphysik and Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Philipp V Demekhin
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Kirill Gokhberg
- Physical-Chemistry Institute, Ruprecht-Karls University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Lorenz S Cederbaum
- Physical-Chemistry Institute, Ruprecht-Karls University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Arno Ehresmann
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - André Knie
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
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19
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Mudryk KD, Seidel R, Winter B, Wilkinson I. The electronic structure of the aqueous permanganate ion: aqueous-phase energetics and molecular bonding studied using liquid jet photoelectron spectroscopy. Phys Chem Chem Phys 2020; 22:20311-20330. [PMID: 32895669 DOI: 10.1039/d0cp04033a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Permanganate aqueous solutions, MnO4-(aq.), were studied using liquid-micro-jet-based soft X-ray non-resonant and resonant photoelectron spectroscopy to determine valence and core-level binding energies. To identify possible differences in the energetics between the aqueous bulk and the solution-gas interface, non-resonant spectra were recorded at two different probing depths. Similar experiments were performed with different counter ions, Na+ and K+, with the two solutions yielding indistinguishable anion electron binding energies. Our resonant photoelectron spectroscopy measurements, performed near the Mn LII,III- and O K-edges, selectively probed valence charge distributions between the Mn metal center, O ligands, and first solvation shell in the aqueous bulk. Associated resonantly-enhanced solute ionisation signals revealed hybridisation of the solute constituents' atomic orbitals, including the inner valence Mn 3p and O 2s. We identified intermolecular coulombic decay relaxation processes following resonant X-ray excitation of the solute that highlight valence MnO4-(aq.)-H2O(l) electronic couplings. Furthermore, our results allowed us to infer oxidative reorganisation energies of MnO4˙(aq.) and adiabatic valence ionisation energies of MnO4-(aq.), revealing the Gibbs free energy of oxidation and permitting estimation of the vertical electron affinity of MnO4˙(aq.). Finally, the Gibbs free energy of hydration of isolated MnO4- was determined. Our results and analysis allowed a near-complete binding-energy-scaled MnO4-(aq.) molecular orbital and a valence energy level diagram to be produced for the MnO4-(aq.)/MnO4˙(aq.) system. Cumulatively, our mapping of the aqueous-phase electronic structure of MnO4- is expected to contribute to a deeper understanding of the exceptional redox properties of this widely applied aqueous transition-metal complex ion.
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Affiliation(s)
- Karen D Mudryk
- Locally-Sensitive & Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany. and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Robert Seidel
- Operando Interfacial Photochemistry, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany and Fachbereich Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Bernd Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Iain Wilkinson
- Locally-Sensitive & Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany.
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20
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Perry CF, Zhang P, Nunes FB, Jordan I, von Conta A, Wörner HJ. Ionization Energy of Liquid Water Revisited. J Phys Chem Lett 2020; 11:1789-1794. [PMID: 31977222 DOI: 10.1021/acs.jpclett.9b03391] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The ionization energy of liquid water is one of its most fundamental properties, an important benchmark for first-principles electronic-structure calculations and a crucial reference in the growing field of liquid-phase photoelectron spectroscopy. Despite this significance, a consensus on its value appears to be missing in the literature. Therefore, we use a monochromatized high-harmonic light source to perform detailed measurements of the ionization energy of liquid water in the presence of a tunable bias voltage applied to the liquid jet. Our results suggest that this simple method is sufficient to simultaneously compensate the effects of the streaming potential and that of the vacuum-level offset between the liquid and the photoelectron spectrometer. Our measurements yield corrected values of the vertical and adiabatic ionization energies of the 1b1 band of bulk liquid water of 11.67(15) and 10.12(15) eV, respectively. Our method is broadly applicable and is likely to result in corrections to the measured ionization energies of solvated species as well.
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Affiliation(s)
- Conaill F Perry
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Pengju Zhang
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Fernanda B Nunes
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Inga Jordan
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Aaron von Conta
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Hans Jakob Wörner
- Laboratorium für Physikalische Chemie, ETH Zurich,Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
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21
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Yang B, Cao X, Lang H, Wang S, Sun C. Study on hydrogen bonding network in aqueous methanol solution by Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 225:117488. [PMID: 31654975 DOI: 10.1016/j.saa.2019.117488] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 08/07/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
The Raman spectra of aqueous methanol solution with various concentrations were measured at room temperature and atmospheric pressure. We found that the CO stretching vibration mode of methanol showed a significant blue shift at Vm (Vm represents the volume fraction of methanol) >0.4, while the CH symmetric and asymmetric stretching vibration modes exhibited red shift under the same conditions. These results illustrate that the variation of hydrogen bond between methanol and water molecules lead to a phase transition of the methanol-water complex at Vm = 0.4. Furthermore, the red shift of the CH vibration mode indicates that there is no hydrogen bond formed between the CH3 group of methanol and water molecules. In addition, we found that the frequency shift of C-H is affected by the hydrogen bond C-O…H-O formed between methanol and water molecules, and the corresponding theoretical discussion is given. Finally, the phase transition process of methanol-water complex in methanol-water binary solution was given by theoretical analysis.
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Affiliation(s)
- Bo Yang
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China
| | - Xianwen Cao
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China
| | - Hongzhi Lang
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China
| | - Shenghan Wang
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China; Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China; State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Chenglin Sun
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China; Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China.
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22
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Milosavljević AR, Jänkälä K, Ranković ML, Canon F, Bozek J, Nicolas C, Giuliani A. Oxygen K-shell spectroscopy of isolated progressively solvated peptide. Phys Chem Chem Phys 2020; 22:12909-12917. [DOI: 10.1039/d0cp00994f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray spectroscopy of an isolated controllably hydrated peptide: core excitation of the first solvation shell enhances peptide backbone fragmentation.
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Affiliation(s)
| | - Kari Jänkälä
- Nano and Molecular Systems Research Unit
- University of Oulu
- 90014 Oulu
- Finland
| | | | - Francis Canon
- Centre des Sciences du Goût et de l’Alimentation
- CNRS
- INRAE
- Université de Bourgogne Franche-Comté
- France
| | - John Bozek
- SOLEIL, l’Orme des Merisiers
- 91192 Gif sur Yvette Cedex
- France
| | | | - Alexandre Giuliani
- SOLEIL, l’Orme des Merisiers
- 91192 Gif sur Yvette Cedex
- France
- INRAE
- UAR1008
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23
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Berg M, Uranga-Piña L, Martínez-Mesa A, Bande A. Wavepacket golden rule treatment of interparticle Coulombic decay in paired quantum dots. J Chem Phys 2019; 151:244111. [PMID: 31893903 DOI: 10.1063/1.5131849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The interparticle Coulombic decay process in paired quantum dots is studied by electron dynamics calculations. We consider a pair of Coulomb-coupled one-electron charged gallium arsenide quantum dots embedded in a nanowire. The two-electron decay process is approximately described by a single active electron model. Within this model, we employ the time-dependent wavepacket approach to the Fermi golden rule (introduced in the context of vibrational predissociation) to calculate autoionization rates, which are compared to exact rates obtained from fully correlated two-electron dynamics calculations. We found that the approximate decay rates agree well with the exact results in the limit of sufficiently separated quantum dots. Finally, we explore whether the short-range behavior of the new model can be further enhanced by the inclusion of local exchange effects by means of regularization of the Coulomb-potential based on a Jastrow-Slater wavefunction. The proposed method may open a route to study the interparticle Coulombic decay in more intricate systems, e.g., paired metal-nanoparticle-quantum dot systems.
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Affiliation(s)
- Matthias Berg
- Department of Locally Sensitive and Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - Llinersy Uranga-Piña
- DynAMoS (Dynamical Processes in Atomic and Molecular Systems), Faculty of Physics, University of Havana, San Lázaro y L, CP 10400 Havana, Cuba
| | - Aliezer Martínez-Mesa
- DynAMoS (Dynamical Processes in Atomic and Molecular Systems), Faculty of Physics, University of Havana, San Lázaro y L, CP 10400 Havana, Cuba
| | - Annika Bande
- Department of Locally Sensitive and Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
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24
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Coste A, Poulesquen A, Diat O, Dufrêche JF, Duvail M. Investigation of the Structure of Concentrated NaOH Aqueous Solutions by Combining Molecular Dynamics and Wide-Angle X-ray Scattering. J Phys Chem B 2019; 123:5121-5130. [PMID: 31141363 DOI: 10.1021/acs.jpcb.9b00495] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Classical molecular dynamics has been performed with explicit polarization on NaOH aqueous solutions from 0.5 mol L-1 up to 9.7 mol L-1. We adapted a force field of OH- for polarizable simulation in order to reproduce the NaOH structural and thermodynamics properties in aqueous solutions. A good agreement between theoretical and experimental results has been found. Wide-angle X-ray scattering (WAXS) intensities issued from molecular dynamics are compared to experimental ones measured on Synchrotron facilities. The structure of the first coordination shell of Na+ has been studied to determine the variation of the oxygen number and hydroxide oxygen around the cation. In addition, Na+-OH- McMillan-Mayer potential issued from molecular dynamics simulations has been calculated and allows for calculating Na+-OH- pair association constant of 0.1 L mol-1, which is in good agreement with the experiments.
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Affiliation(s)
- Amaury Coste
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM , Marcoule , France
| | | | - Olivier Diat
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM , Marcoule , France
| | | | - Magali Duvail
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM , Marcoule , France
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25
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Richter C, Hollas D, Saak CM, Förstel M, Miteva T, Mucke M, Björneholm O, Sisourat N, Slavíček P, Hergenhahn U. Competition between proton transfer and intermolecular Coulombic decay in water. Nat Commun 2018; 9:4988. [PMID: 30478319 PMCID: PMC6255891 DOI: 10.1038/s41467-018-07501-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/06/2018] [Indexed: 12/01/2022] Open
Abstract
Intermolecular Coulombic decay (ICD) is a ubiquitous relaxation channel of electronically excited states in weakly bound systems, ranging from dimers to liquids. As it is driven by electron correlation, it was assumed that it will dominate over more established energy loss mechanisms, for example fluorescence. Here, we use electron-electron coincidence spectroscopy to determine the efficiency of the ICD process after 2a1 ionization in water clusters. We show that this efficiency is surprisingly low for small water clusters and that it gradually increases to 40-50% for clusters with hundreds of water units. Ab initio molecular dynamics simulations reveal that proton transfer between neighboring water molecules proceeds on the same timescale as ICD and leads to a configuration in which the ICD channel is closed. This conclusion is further supported by experimental results from deuterated water. Combining experiment and theory, we infer an intrinsic ICD lifetime of 12-52 fs for small water clusters.
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Affiliation(s)
- Clemens Richter
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, 04318, Leipzig, Germany
| | - Daniel Hollas
- Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628, Prague 6, Czech Republic
| | - Clara-Magdalena Saak
- Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
| | - Marko Förstel
- Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748, Garching, Germany
- Institute for Optics and Atomic Physics, Technical University Berlin, Hardenbergstr. 36, 10623, Berlin, Germany
| | - Tsveta Miteva
- Laboratoire de Chimie Physique Matière et Rayonnement, UMR 7614, Sorbonne Université, CNRS, F-75005, Paris, France
| | - Melanie Mucke
- Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
| | - Olle Björneholm
- Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
| | - Nicolas Sisourat
- Laboratoire de Chimie Physique Matière et Rayonnement, UMR 7614, Sorbonne Université, CNRS, F-75005, Paris, France
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628, Prague 6, Czech Republic.
| | - Uwe Hergenhahn
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, 04318, Leipzig, Germany.
- Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491, Greifswald, Germany.
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26
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Silletta EV, Tuckerman ME, Jerschow A. Unusual Proton Transfer Kinetics in Water at the Temperature of Maximum Density. PHYSICAL REVIEW LETTERS 2018; 121:076001. [PMID: 30169046 DOI: 10.1103/physrevlett.121.076001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/26/2018] [Indexed: 06/08/2023]
Abstract
Water exhibits numerous anomalous properties, many of which remain poorly understood. One of its intriguing behaviors is that it exhibits a temperature of maximum density (TMD) at 4 °C. We provide here new experimental evidence for hitherto unknown abrupt changes in proton transfer kinetics at the TMD. In particular, we show that the lifetime of OH^{-} ions has a maximum at this temperature, in contrast to hydronium ions. Furthermore, base-catalyzed proton transfer shows a sharp local minimum at this temperature, and activation energies change abruptly as well. The measured lifetimes agree with earlier theoretical predictions as the temperature approaches the TMD. Similar results are also found for heavy water at its own TMD. These findings point to a high propensity of forming fourfold coordinated OH^{-} solvation complexes at the TMD, underlining the asymmetry between hydroxide and hydronium transport. These results could help to further elucidate the unusual properties of water and related liquids.
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Affiliation(s)
- Emilia V Silletta
- Department of Chemistry, New York University, New York, New York 10003, USA
| | - Mark E Tuckerman
- Department of Chemistry, New York University, New York, New York 10003, USA
- Courant Institute of Mathematical Science, New York University, New York, New York 10012, USA
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshan Road North, Shanghai 200062, China
| | - Alexej Jerschow
- Department of Chemistry, New York University, New York, New York 10003, USA
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27
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Ali H, Seidel R, Pohl MN, Winter B. Molecular species forming at the α-Fe 2O 3 nanoparticle-aqueous solution interface. Chem Sci 2018; 9:4511-4523. [PMID: 29896394 PMCID: PMC5961451 DOI: 10.1039/c7sc05156e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 04/19/2018] [Indexed: 11/22/2022] Open
Abstract
We report on electronic structure measurements of the interface between hematite nanoparticles (6 nm diameter) and aqueous solutions. Using soft X-ray photoelectron spectroscopy from a liquid microjet we detect valence and core-level photoelectrons as well as Auger electrons from liquid water, from the nanoparticle-water interface, and from the interior of the aqueous-phase nanoparticles. Most noteworthy, the method is shown to be sufficiently sensitive for the detection of adsorbed hydroxyl species, resulting from H2O dissociation at the nanoparticle surface in aqueous solution. We obtain signal from surface OH from resonant, non-resonant, and from so-called partial-electron-yield X-ray absorption (PEY-XA) spectra. In addition, we report resonant photoelectron measurements at the iron 2p excitation. The respective Fe iron 2p3/2 edge (L3-edge) PEY-XA spectra exhibit two main absorption peaks with their energies being sensitive to the chemical environment of the Fe3+ ions at the nanoparticle-solution interface. This manifests in the 10Dq value which is a measure of the ligand-field strength. Furthermore, an observed intensity variation of the pre-peak, when comparing the PEY-XA spectra for different iron Auger-decay channels, can be assigned to different extents of electron delocalization. From the experimental fraction of local versus non-local autoionization signals we then find a very fast, approximately 1 fs, charge transfer time from interfacial Fe3+ into the environment. The present study, which is complementary to ambient-pressure photoemission studies on solid-electrolyte systems, also highlights the multiple aspects of photoemission that need to be explored for a full characterization of the transition-metal-oxide nanoparticle surface in aqueous phase.
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Affiliation(s)
- Hebatallah Ali
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , D-14195 Berlin , Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie , Albert-Einstein-Straße 15 , D-12489 Berlin , Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie , Albert-Einstein-Straße 15 , D-12489 Berlin , Germany
- Humboldt-Universität zu Berlin , Department of Chemistry , Brook-Taylor-Str. 2 , D-12489 Berlin , Germany
| | - Marvin N Pohl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , D-14195 Berlin , Germany
| | - Bernd Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany .
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28
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Moqadam M, Lervik A, Riccardi E, Venkatraman V, Alsberg BK, van Erp TS. Local initiation conditions for water autoionization. Proc Natl Acad Sci U S A 2018; 115:E4569-E4576. [PMID: 29712836 PMCID: PMC5960278 DOI: 10.1073/pnas.1714070115] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The pH of liquid water is determined by the infrequent process in which water molecules split into short-lived hydroxide and hydronium ions. This reaction is difficult to probe experimentally and challenging to simulate. One of the open questions is whether the local water structure around a slightly stretched OH bond is actually initiating the eventual breakage of this bond or whether this event is driven by a global ordering that involves many water molecules far away from the reaction center. Here, we investigated the self-ionization of water at room temperature by rare-event ab initio molecular dynamics and obtained autoionization rates and activation energies in good agreement with experiments. Based on the analysis of thousands of molecular trajectories, we identified a couple of local order parameters and show that if a bond stretch occurs when all these parameters are around their ideal range, the chance for the first dissociation step (double-proton jump) increases from [Formula: see text] to 0.4. Understanding these initiation triggers might ultimately allow the steering of chemical reactions.
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Affiliation(s)
- Mahmoud Moqadam
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Anders Lervik
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;
| | - Enrico Riccardi
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Vishwesh Venkatraman
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Bjørn Kåre Alsberg
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Titus S van Erp
- Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;
- Center for Molecular Modeling, Ghent University, B9000 Ghent, Belgium
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29
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Hydroxide diffuses slower than hydronium in water because its solvated structure inhibits correlated proton transfer. Nat Chem 2018. [DOI: 10.1038/s41557-018-0010-2] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Zhao Y, Zhu J, Ding J, Van der Bruggen B, Shen J, Gao C. Electric-pulse layer-by-layer assembled of anion exchange membrane with enhanced monovalent selectivity. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2017.11.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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31
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Yang J, Kong X, Jiang L. On the solvation of hydronium by carbon dioxide: Structural and infrared spectroscopic study of (H3O+)(CO2). Chem Phys 2018. [DOI: 10.1016/j.chemphys.2017.11.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Weber F, Aziz EF, Bande A. Interdependence of ICD rates in paired quantum dots on geometry. J Comput Chem 2017; 38:2141-2150. [PMID: 28568014 DOI: 10.1002/jcc.24843] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 04/13/2017] [Accepted: 04/26/2017] [Indexed: 11/09/2022]
Abstract
Using state-of-the-art antisymmetrized multiconfiguration time-dependent Hartree (MCTDH) electron dynamics calculations we study the interdependence of the intermolecular Coulombic decay (ICD) process on the geometric parameters of a doubly-charged paired quantum dot (PQD) model system in the framework of the effective mass approximation (EMA). We find that ICD displays a maximum rate for a certain geometry of the electron-emitting quantum dot, which is simultaneously dependent on both the distance between the quantum dots as well as the photon-absorbing quantum dot's geometry. The rate maximum is shown to be caused by the competing effects of polarization of electron density and Coulomb repulsion. The ICD rate-maximized PQD geometry in GaAs QDs yields a decay time of 102.39 ps. It is given by two vertically-aligned cylindrical QDs with radii of 14.42 nm separated by 86.62 nm. The photon absorbing QD then has a height of 46.59 nm and the electron emitting QD a height of 16.33 nm. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Fabian Weber
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, Berlin, 12489, Germany
| | - Emad F Aziz
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, Berlin, 12489, Germany.,Department of Physics, Freie Universitt Berlin, Arnimallee 14, Berlin, 14195, Germany.,School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Annika Bande
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, Berlin, 12489, Germany
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33
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Pohl MN, Richter C, Lugovoy E, Seidel R, Slavíček P, Aziz EF, Abel B, Winter B, Hergenhahn U. Sensitivity of Electron Transfer Mediated Decay to Ion Pairing. J Phys Chem B 2017; 121:7709-7714. [PMID: 28696722 DOI: 10.1021/acs.jpcb.7b06061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ion pairing in electrolyte solutions remains a topic of discussion despite a long history of research. Very recently, nearest-neighbor mediated electronic de-excitation processes of core hole vacancies (electron transfer mediated decay, ETMD) were proposed to carry a spectral fingerprint of local solvation structure and in particular of contact ion pairs. Here, for the first time, we apply electron-electron coincidence detection to a liquid microjet, and record ETMD spectra of Li 1s vacancies in aqueous solutions of lithium chloride (LiCl) in direct comparison to lithium acetate (LiOAc). A change in the ETMD spectrum dependent on the electrolyte anion identity is observed for 4.5 M salt concentration. We discuss these findings within the framework of the formation and presence of contact ion pairs and the unique sensitivity of ETMD spectroscopy to ion pairing.
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Affiliation(s)
- Marvin N Pohl
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany.,Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany
| | - Clemens Richter
- Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany.,Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany
| | - Evgeny Lugovoy
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology , Technická 5, 16628 Prague, Czech Republic
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany.,Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany.,School of Chemistry, Monash University , 3800 Clayton, Victoria, Australia
| | - Bernd Abel
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany.,Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, University of Leipzig , Linnéstr. 2, 04103 Leipzig, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Uwe Hergenhahn
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany.,Max Planck Institute for Plasma Physics , Wendelsteinstr. 1, 17491 Greifswald, Germany
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34
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Seidel R, Pohl MN, Ali H, Winter B, Aziz EF. Advances in liquid phase soft-x-ray photoemission spectroscopy: A new experimental setup at BESSY II. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:073107. [PMID: 28764540 DOI: 10.1063/1.4990797] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A state-of-the-art experimental setup for soft X-ray photo- and Auger-electron spectroscopy from liquid phase has been built for operation at the synchrotron-light facility BESSY II, Berlin. The experimental station is named SOL3, which is derived from solid, solution, and solar, and refers to the aim of studying solid-liquid interfaces, optionally irradiated by photons in the solar spectrum. SOL3 is equipped with a high-transmission hemispherical electron analyzer for detecting electrons emitted from small molecular aggregates, nanoparticles, or biochemical molecules and their components in (aqueous) solutions, either in vacuum or in an ambient pressure environment. In addition to conventional energy-resolved electron detection, SOL3 enables detection of electron angular distributions by the combination of a ±11° acceptance angle of the electron analyzer and a rotation of the analyzer in the polarization plane of the incoming synchrotron-light beam. The present manuscript describes the technical features of SOL3, and we also report the very first measurements of soft-X-ray photoemission spectra from a liquid microjet of neat liquid water and of TiO2-nanoparticle aqueous solution obtained with this new setup, highlighting the necessity for state-of-the-art electron detection.
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Affiliation(s)
- Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
| | - Marvin N Pohl
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
| | - Hebatallah Ali
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
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35
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Hollas D, Pohl MN, Seidel R, Aziz EF, Slavíček P, Winter B. Aqueous Solution Chemistry of Ammonium Cation in the Auger Time Window. Sci Rep 2017; 7:756. [PMID: 28389650 PMCID: PMC5429669 DOI: 10.1038/s41598-017-00756-x] [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: 12/19/2016] [Accepted: 03/09/2017] [Indexed: 11/26/2022] Open
Abstract
We report on chemical reactions triggered by core-level ionization of ammonium ([Formula: see text]) cation in aqueous solution. Based on a combination of photoemission experiments from a liquid microjet and high-level ab initio simulations, we identified simultaneous single and double proton transfer occurring on a very short timescale spanned by the Auger-decay lifetime. Molecular dynamics simulations indicate that the proton transfer to a neighboring water molecule leads to essentially complete formation of H3O+ (aq) and core-ionized ammonia [Formula: see text](aq) within the ~7 fs lifetime of the nitrogen 1s core hole. A second proton transfer leads to a transient structure with the proton shared between the remaining NH2 moiety and another water molecule in the hydration shell. These ultrafast proton transfers are stimulated by very strong hydrogen bonds between the ammonium cation and water. Experimentally, the proton transfer dynamics is identified from an emerging signal at the high-kinetic energy side of the Auger-electron spectrum in analogy to observations made for other hydrogen-bonded aqueous solutions. The present study represents the most pronounced charge separation observed upon core ionization in liquids so far.
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Affiliation(s)
- Daniel Hollas
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 16628, Prague, Czech Republic
| | - Marvin N Pohl
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489, Berlin, Germany
- Department of Physics, Freie Universität Berlin, Arnimallee 14, D-141595, Berlin, Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489, Berlin, Germany
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489, Berlin, Germany
- School of Chemistry, Monash University, 3800 Clayton, Victoria, Australia
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 16628, Prague, Czech Republic.
- J. Heyrovský Institute of Physical Chemistry, Dolejškova 3, 18223, Prague 8, Czech Republic.
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Straße 15, D-12489, Berlin, Germany.
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195, Berlin, Germany.
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36
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Unger I, Seidel R, Thürmer S, Pohl MN, Aziz EF, Cederbaum LS, Muchová E, Slavíček P, Winter B, Kryzhevoi NV. Observation of electron-transfer-mediated decay in aqueous solution. Nat Chem 2017. [DOI: 10.1038/nchem.2727] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Sakti AW, Nishimura Y, Nakai H. Divide-and-Conquer-Type Density-Functional Tight-Binding Simulations of Hydroxide Ion Diffusion in Bulk Water. J Phys Chem B 2017; 121:1362-1371. [DOI: 10.1021/acs.jpcb.6b10659] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Hiromi Nakai
- Core
Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Chiyoda-ku, Tokyo 102-0075, Japan
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8520, Japan
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38
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Pavlychev AA, Avrunin AS, Vinogradov AS, Filatova EO, Doctorov AA, Krivosenko YS, Samoilenko DO, Svirskiy GI, Konashuk AS, Rostov DA. Local electronic structure and nanolevel hierarchical organization of bone tissue: theory and NEXAFS study. NANOTECHNOLOGY 2016; 27:504002. [PMID: 27875332 DOI: 10.1088/0957-4484/27/50/504002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Theoretical and experimental investigations of native bone are carried out to understand relationships between its hierarchical organization and local electronic and atomic structure of the mineralized phase. The 3D superlattice model of a coplanar assembly of the hydroxyapatite (HAP) nanocrystallites separated by the hydrated nanolayers is introduced to account the interplay of short-, long- and super-range order parameters in bone tissue. The model is applied to (i) predict and rationalize the HAP-to-bone spectral changes in the electronic structure and (ii) describe the mechanisms ensuring the link of the hierarchical organization with the electronic structure of the mineralized phase in bone. To check the predictions the near-edge x-ray absorption fine structure (NEXAFS) at the Ca 2p, P 2p and O 1s thresholds is measured for native bone and compared with NEXAFS for reference compounds. The NEXAFS analysis has demonstrated the essential hierarchy induced HAP-to-bone red shifts of the Ca and P 2p-to-valence transitions. The lowest O 1s excitation line at 532.2 eV in bone is assigned with superposition of core transitions in the hydroxide OH-(H2O) m anions, Ca2+(H2O) n cations, the carboxyl groups inside the collagen and [PO4]2- and [PO4]- anions with unsaturated P-O bonds.
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Affiliation(s)
- A A Pavlychev
- Solid State Electronics Department, St. Petersburg State University, St. Petersburg, 198504, Russian Federation
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Huppert M, Jordan I, Baykusheva D, von Conta A, Wörner HJ. Attosecond Delays in Molecular Photoionization. PHYSICAL REVIEW LETTERS 2016; 117:093001. [PMID: 27610849 DOI: 10.1103/physrevlett.117.093001] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Indexed: 05/12/2023]
Abstract
We report measurements of energy-dependent photoionization delays between the two outermost valence shells of N_{2}O and H_{2}O. The combination of single-shot signal referencing with the use of different metal foils to filter the attosecond pulse train enables us to extract delays from congested spectra. Remarkably large delays up to 160 as are observed in N_{2}O, whereas the delays in H_{2}O are all smaller than 50 as in the photon-energy range of 20-40 eV. These results are interpreted by developing a theory of molecular photoionization delays. The long delays measured in N_{2}O are shown to reflect the population of molecular shape resonances that trap the photoelectron for a duration of up to ∼110 as. The unstructured continua of H_{2}O result in much smaller delays at the same photon energies. Our experimental and theoretical methods make the study of molecular attosecond photoionization dynamics accessible.
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Affiliation(s)
- Martin Huppert
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Inga Jordan
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Denitsa Baykusheva
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Aaron von Conta
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Hans Jakob Wörner
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
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Dolbundalchok P, Peláez D, Aziz EF, Bande A. Geometrical control of the interatomic coulombic decay process in quantum dots for infrared photodetectors. J Comput Chem 2016; 37:2249-59. [PMID: 27452332 DOI: 10.1002/jcc.24410] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/24/2016] [Accepted: 05/02/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Praphasiri Dolbundalchok
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg; Im Neuenheimer Feld 229 Heidelberg 69120 Germany
| | - Daniel Peláez
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg; Im Neuenheimer Feld 229 Heidelberg 69120 Germany
- Laboratoire PhLAM - UFR Physique Bâtiment P5, Université Lille 1, 59655 Villeneuve dAscq Cedex, France
| | - Emad F. Aziz
- Institute of Methods for Material Development and Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Str. 15 12489 Berlin Germany
- Department of Physics; Freie Universit¨at Berlin; Arnimallee 14 14195 Berlin Germany
| | - Annika Bande
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg; Im Neuenheimer Feld 229 Heidelberg 69120 Germany
- Institute of Methods for Material Development and Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Str. 15 12489 Berlin Germany
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Yoshinaga MY, Kellermann MY, Valentine DL, Valentine RC. Phospholipids and glycolipids mediate proton containment and circulation along the surface of energy-transducing membranes. Prog Lipid Res 2016; 64:1-15. [PMID: 27448687 DOI: 10.1016/j.plipres.2016.07.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 05/29/2016] [Accepted: 07/13/2016] [Indexed: 01/06/2023]
Abstract
Proton bioenergetics provides the energy for growth and survival of most organisms in the biosphere ranging from unicellular marine phytoplankton to humans. Chloroplasts harvest light and generate a proton electrochemical gradient (proton motive force) that drives the production of ATP needed for carbon dioxide fixation and plant growth. Mitochondria, bacteria and archaea generate proton motive force to energize growth and other physiologies. Energy transducing membranes are at the heart of proton bioenergetics and are responsible for catalyzing the conversion of energy held in high-energy electrons→electron transport chain→proton motive force→ATP. Whereas the electron transport chain is understood in great detail there are major gaps in understanding mechanisms of proton transfer or circulation during proton bioenergetics. This paper is built on the proposition that phospho- and glyco-glycerolipids form proton transport circuitry at the membrane's surface. By this proposition, an emergent membrane property, termed the hyducton, confines active/unbound protons or hydronium ions to a region of low volume close to the membrane surface. In turn, a von Grotthuß mechanism rapidly moves proton substrate in accordance with nano-electrochemical poles on the membrane surface created by powerful proton pumps such as ATP synthase.
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Affiliation(s)
- Marcos Y Yoshinaga
- University of Bremen, MARUM - Center for Marine and Environmental Sciences, Germany.
| | - Matthias Y Kellermann
- University of California Santa Barbara - Department of Earth Science and Marine Science Institute, USA
| | - David L Valentine
- University of California Santa Barbara - Department of Earth Science and Marine Science Institute, USA
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Tesch MF, Golnak R, Ehrhard F, Schön D, Xiao J, Atak K, Bande A, Aziz EF. Analysis of the Electronic Structure of Aqueous Urea and Its Derivatives: A Systematic Soft X-Ray-TD-DFT Approach. Chemistry 2016; 22:12040-9. [DOI: 10.1002/chem.201601235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/24/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Marc F. Tesch
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
| | - Ronny Golnak
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
- Department of Chemistry; Freie Universität Berlin; Takustraße 3 14195 Berlin Germany
| | - Felix Ehrhard
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
| | - Daniela Schön
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
- Department of Physics; Freie Universität Berlin; Arnimallee 14 14195 Berlin Germany
| | - Jie Xiao
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
| | - Kaan Atak
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
- Department of Physics; Freie Universität Berlin; Arnimallee 14 14195 Berlin Germany
| | - Annika Bande
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
| | - Emad F. Aziz
- Institute of Methods for Material Development; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Albert-Einstein-Straße 15 12489 Berlin Germany
- Department of Physics; Freie Universität Berlin; Arnimallee 14 14195 Berlin Germany
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Kryzhevoi NV. Microhydration of LiOH: Insight from electronic decays of core-ionized states. J Chem Phys 2016; 144:244302. [PMID: 27369510 DOI: 10.1063/1.4954661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We compute and compare the autoionization spectra of a core-ionized LiOH molecule both in its isolated and microhydrated states. Stepwise microhydration of LiOH leads to gradual elongation of the Li-OH bond length and finally to molecular dissociation. The accompanying changes in the local environment of the OH(-) and Li(+) counterions are reflected in the computed O 1s and Li 1s spectra. The role of solvent water molecules and the counterion in the spectral shape formation is assessed. Electronic decays of the microhydrated LiOH are found to be mostly intermolecular since the majority of the populated final states have at least one outer-valence vacancy outside the initially core-ionized ion, mainly on a neighboring water molecule. The charge delocalization occurs through the intermolecular Coulombic and electron transfer mediated decays. Both mechanisms are highly efficient that is partly attributed to hybridization of molecular orbitals. The computed spectral shapes are sensitive to the counterion separation as well as to the number and arrangement of solvent molecules. These sensitivities can be used for studying the local hydration structure of solvated ions in aqueous solutions.
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Affiliation(s)
- Nikolai V Kryzhevoi
- Theoretical Chemistry, Institute of Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
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Slavíček P, Kryzhevoi NV, Aziz EF, Winter B. Relaxation Processes in Aqueous Systems upon X-ray Ionization: Entanglement of Electronic and Nuclear Dynamics. J Phys Chem Lett 2016; 7:234-243. [PMID: 26712083 DOI: 10.1021/acs.jpclett.5b02665] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The knowledge of primary processes following the interaction of high-energy radiation with molecules in liquid phase is rather limited. In the present Perspective, we report on a newly discovered type of relaxation process involving simultaneous autoionization and proton transfer between adjacent molecules, so-called proton transfer mediated charge separation (PTM-CS) process. Within PTM-CS, transients with a half-transferred proton are formed within a few femtoseconds after the core-level ionization event. Subsequent nonradiative decay of the highly nonequilibrium transients leads to a series of reactive species, which have not been considered in any high-energy radiation process in water. Nonlocal electronic decay processes are surprisingly accelerated upon proton dynamics. Such strong coupling of electronic and nuclear dynamics is a general phenomenon for hydrogen-bonded systems, however, its probability correlates strongly with hydration geometry. We suggest that the newly observed processes will impact future high-energy radiation-chemistry-relevant modeling, and we envision application of autoionization spectroscopy for identification of solution structure details.
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Affiliation(s)
- Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology , Technická 5, 16628 Prague, Czech Republic
| | - Nikolai V Kryzhevoi
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg , Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Straße 15, D-12489 Berlin, Germany
- Department of Physics, Freie Universität Berlin , Arnimallee 14, D-14159 Berlin, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Straße 15, D-12489 Berlin, Germany
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46
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MORITA M, TAKAHASHI K. Ionic Hydrogen Bonding Vibration in OH<sup>−</sup>(H<sub>2</sub>O)<sub>2-4</sub>. JOURNAL OF COMPUTER CHEMISTRY-JAPAN 2016. [DOI: 10.2477/jccj.2016-0012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Masato MORITA
- Department of Physics, University of Nevada, Reno, 1664 N. Virginia St, Reno, NV 89557
| | - Kaito TAKAHASHI
- Institute of Atomic and Molecular Sciences, Academia Sinica, No. 1, Roosevelt Rd., Sec. 4, Taipei, 10617, Taiwan
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Unger I, Hollas D, Seidel R, Thürmer S, Aziz EF, Slavíček P, Winter B. Control of X-ray Induced Electron and Nuclear Dynamics in Ammonia and Glycine Aqueous Solution via Hydrogen Bonding. J Phys Chem B 2015. [PMID: 26225896 DOI: 10.1021/acs.jpcb.5b07283] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Isaak Unger
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Daniel Hollas
- Department
of Physical Chemistry, University of Chemistry and Technology, Technická
5, 16628 Prague, Czech Republic
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Stephan Thürmer
- Department
of Chemistry, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
- Department
of Physics, Freie Universität Berlin, Arnimallee 14, D-14159 Berlin, Germany
| | - Petr Slavíček
- Department
of Physical Chemistry, University of Chemistry and Technology, Technická
5, 16628 Prague, Czech Republic
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
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Abstract
Using ab initio simulations, we explore the glassy landscape of the OH(-)(H2O)20 cluster and its infrared spectrum. We show that the OH(-) has an amphiphilic Janus-type behavior like the hydronium ion induced by the ability of its O-H bond to be buried inside of the cluster or exposed at the surface with different coordination numbers. Recent infrared experiments of aqueous NaOH have found two pronounced peaks at 2000 and 2850 cm(-1) [Mandal, A.; J. Chem. Phys. 2014, 140, 1-12]. The microscopic origins of these spectral features remain elusive. Herein, we disentangle the contribution of the spectra between 1700 and 3000 cm(-1) in terms of the microscopic solvation structure of OH(-) and dub this as the amphiphilic band. The delocalized nature of OH(-) results in a red shift to the O-H stretch, which mixes with bend-vibrations, the extent to which is tuned by the local coordination number. These results have important bearing on understanding the spectroscopic signatures of OH(-) in environments like the air-water interface.
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Affiliation(s)
- Yanier Crespo
- The Abdus Salam ICTP, Strada Costiera 11, I-34151 Trieste, Italy
| | - Ali Hassanali
- The Abdus Salam ICTP, Strada Costiera 11, I-34151 Trieste, Italy
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50
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Lin RJ, Nguyen QC, Ong YS, Takahashi K, Kuo JL. Temperature dependent structural variations of OH−(H2O)n, n = 4–7: effects on vibrational and photoelectron spectra. Phys Chem Chem Phys 2015; 17:19162-72. [DOI: 10.1039/c5cp02604k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this work, we identified a large number of structurally distinct isomers of midsized deprotonated water clusters using first-principles methods.
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Affiliation(s)
- Ren-Jie Lin
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Quoc Chinh Nguyen
- Singapore Institute of Manufacturing Technology
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
| | - Yew-Soon Ong
- School of Computer Engineering
- Nanyang Technological University
- Singapore
| | - Kaito Takahashi
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
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