1
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Guo M, Dongfang N, Iannuzzi M, van Bokhoven JA, Artiglia L. Structure and Reactivity of Active Oxygen Species on Silver Surfaces for Ethylene Epoxidation. ACS Catal 2024; 14:10234-10244. [PMID: 38988650 PMCID: PMC11232021 DOI: 10.1021/acscatal.4c01566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 07/12/2024]
Abstract
The epoxidation of ethylene stands as one of the most important industrial catalytic reactions, and silver-based catalysts show superior activity and selectivity. Oxygen is activated on the surface of silver during the reaction and exerts a substantial impact on product selectivity. Notably, the oxygen species residing in the topmost atomic layers profoundly influence the reactivity of a catalyst. However, their characterization under in situ reaction conditions remains a huge challenge, and specific structures have not been identified yet. In this study, we employ in situ X-ray photoelectron spectroscopy and density functional theory calculations to determine the oxygen species formed at the topmost atomic layers of a silver foil and to assign them a structure. Three different groups of oxygen species activated on silver are identified: (i) surface lattice oxygen and two oxygen species originating from associatively adsorbed dioxygen and (ii) top and (iii) subsurface oxygen. Transient in situ photoelectron spectroscopy experiments are carried out to reveal the dynamic evolution and thus reactivity of the different oxygen species under ethylene epoxidation reaction environments. The top oxygen atom from the adsorbed associated dioxygen is the most active. Meanwhile, a frequency-selective data analysis method, developed to process time-resolved data, provides insights into the evolving trends of peak intensities for different oxygen species. The versatility of this method suggests its potential application in future time-resolved characterization studies.
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Affiliation(s)
- Man Guo
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland
| | - Nanchen Dongfang
- Department of Chemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Marcella Iannuzzi
- Department of Chemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Jeroen Anton van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland
| | - Luca Artiglia
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
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2
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Sterling CM, Kamal C, García-Fernández A, Man GJ, Svanström S, Nayak PK, Butorin SM, Rensmo H, Cappel UB, Odelius M. Electronic Structure and Chemical Bonding in Methylammonium Lead Triiodide and Its Precursor Methylammonium Iodide. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:20143-20154. [PMID: 36483685 PMCID: PMC9720748 DOI: 10.1021/acs.jpcc.2c06782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/01/2022] [Indexed: 06/17/2023]
Abstract
A detailed examination of the electronic structures of methylammonium lead triiodide (MAPI) and methylammonium iodide (MAI) is performed with ab initio molecular dynamics (AIMD) simulations based on density functional theory, and the theoretical results are compared to experimental probes. The occupied valence bands of a MAPI single crystal and MAI powder are probed with X-ray photoelectron spectroscopy, and the conduction bands are probed from the perspective of nitrogen K-edge X-ray absorption spectroscopy. Combined, the theoretical simulations and the two experimental techniques allow for a dissection of the electronic structure unveiling the nature of chemical bonding in MAPI and MAI. Here, we show that the difference in band gap between MAPI and MAI is caused chiefly by interactions between iodine and lead but also weaker interactions with the MA+ counterions. Spatial decomposition of the iodine p levels allows for analysis of Pb-I σ bonds and π interactions, which contribute to this effect with the involvement of the Pb 6p levels. Differences in hydrogen bonding between the two materials, seen in the AIMD simulations, are reflected in nitrogen valence orbital composition and in nitrogen K-edge X-ray absorption spectra.
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Affiliation(s)
- Cody M. Sterling
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91Stockholm, Sweden
| | - Chinnathambi Kamal
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91Stockholm, Sweden
- Theory
and Simulations Laboratory, Theoretical and Computational Physics
Section, Raja Ramanna Centre for Advanced
Technology, Indore452013, India
- Homi
Bhabha National Institute, Training School
Complex, Anushakti Nagar, Mumbai400094, India
| | - Alberto García-Fernández
- Division
of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, SE-100 44Stockholm, Sweden
| | - Gabriel J. Man
- Condensed
Matter Physics of Energy Materials, Division of X-ray Photon Science,
Department of Physics and Astronomy, Uppsala
University, Box 516, SE-75121Uppsala, Sweden
- GJM
Scientific
Consulting, Fort Lee, New Jersey07024, United States
| | - Sebastian Svanström
- Condensed
Matter Physics of Energy Materials, Division of X-ray Photon Science,
Department of Physics and Astronomy, Uppsala
University, Box 516, SE-75121Uppsala, Sweden
| | - Pabitra K. Nayak
- Tata
Institute of Fundamental Research, 36/P, Gopanpally Village, Serilingampally Mandal, Ranga Reddy District, Hyderabad500046, India
| | - Sergei M. Butorin
- Condensed
Matter Physics of Energy Materials, Division of X-ray Photon Science,
Department of Physics and Astronomy, Uppsala
University, Box 516, SE-75121Uppsala, Sweden
| | - Håkan Rensmo
- Condensed
Matter Physics of Energy Materials, Division of X-ray Photon Science,
Department of Physics and Astronomy, Uppsala
University, Box 516, SE-75121Uppsala, Sweden
| | - Ute B. Cappel
- Division
of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, SE-100 44Stockholm, Sweden
| | - Michael Odelius
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91Stockholm, Sweden
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3
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Ekimova M, Kleine C, Ludwig J, Ochmann M, Agrenius TEG, Kozari E, Pines D, Pines E, Huse N, Wernet P, Odelius M, Nibbering ETJ. From Local Covalent Bonding to Extended Electric Field Interactions in Proton Hydration. Angew Chem Int Ed Engl 2022; 61:e202211066. [PMID: 36102247 PMCID: PMC9827956 DOI: 10.1002/anie.202211066] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Indexed: 01/12/2023]
Abstract
Seemingly simple yet surprisingly difficult to probe, excess protons in water constitute complex quantum objects with strong interactions with the extended and dynamically changing hydrogen-bonding network of the liquid. Proton hydration plays pivotal roles in energy transport in hydrogen fuel cells and signal transduction in transmembrane proteins. While geometries and stoichiometry have been widely addressed in both experiment and theory, the electronic structure of these specific hydrated proton complexes has remained elusive. Here we show, layer by layer, how utilizing novel flatjet technology for accurate x-ray spectroscopic measurements and combining infrared spectral analysis and calculations, we find orbital-specific markers that distinguish two main electronic-structure effects: Local orbital interactions determine covalent bonding between the proton and neigbouring water molecules, while orbital-energy shifts measure the strength of the extended electric field of the proton.
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Affiliation(s)
- Maria Ekimova
- Max Born Institut für Nichtlineare Optik und KurzzeitspektroskopieMax Born Strasse 2A12489BerlinGermany
| | - Carlo Kleine
- Max Born Institut für Nichtlineare Optik und KurzzeitspektroskopieMax Born Strasse 2A12489BerlinGermany
| | - Jan Ludwig
- Max Born Institut für Nichtlineare Optik und KurzzeitspektroskopieMax Born Strasse 2A12489BerlinGermany
| | - Miguel Ochmann
- Institute for Nanostructure and Solid State Physics, Center for Free-Electron Laser ScienceLuruper Chaussee 14922761HamburgGermany
| | - Thomas E. G. Agrenius
- Department of PhysicsStockholm UniversityAlbaNova University Center106 91StockholmSweden
| | - Eve Kozari
- Department of ChemistryBen Gurion University of the NegevP.O.B. 653Beersheva84105Israel
| | - Dina Pines
- Department of ChemistryBen Gurion University of the NegevP.O.B. 653Beersheva84105Israel
| | - Ehud Pines
- Department of ChemistryBen Gurion University of the NegevP.O.B. 653Beersheva84105Israel
| | - Nils Huse
- Institute for Nanostructure and Solid State Physics, Center for Free-Electron Laser ScienceLuruper Chaussee 14922761HamburgGermany
| | - Philippe Wernet
- Department of Physics and AstronomyUppsala UniversityBox 516 Lägerhyddsvägen 1751 20UppsalaSweden
| | - Michael Odelius
- Department of PhysicsStockholm UniversityAlbaNova University Center106 91StockholmSweden
| | - Erik T. J. Nibbering
- Max Born Institut für Nichtlineare Optik und KurzzeitspektroskopieMax Born Strasse 2A12489BerlinGermany
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4
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Liu D, Li J, Wu J, Lu D. Ab Initio Molecular Dynamics Simulation of Water Transport through Short Carbon Nanotubes. ACS OMEGA 2022; 7:40466-40479. [PMID: 36385899 PMCID: PMC9647839 DOI: 10.1021/acsomega.2c05588] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Water transport through short single-walled (6, 6) carbon nanotubes (CNTs) was investigated with ab initio molecular dynamics (AIMD) simulation at different temperatures. The water molecules under extreme confinement present a one-dimensional jagged pattern owing to hydrogen bonding, with the near-perfect alignment of the dipole orientations. CNTs ending with dangling bonds can promote water dissociation near the entrance and the occurrence of dipole flipping along the water wire at high temperatures, accompanied by the formation of D defects and L defects in the hydrogen-bond network. In contrast, dissociation of water molecules rarely takes place if the dangling bonds at the ends of the CNTs are terminated with H atoms. Angular jumps of water molecules are commonplace inside the narrow CNTs, implying a low-energy barrier for hydrogen-bond exchange among water molecules in narrow CNTs. The simulation results demonstrate the high activity of dangling bonds at the ends of short CNTs, accompanying passivation processes and their profound impact on water structure and transport, which is important for diverse technological applications.
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Affiliation(s)
- Dongfei Liu
- Department
of Chemical Engineering, Tsinghua University, Beijing100084, P. R. China
| | - Jipeng Li
- School
of Materials Science and Engineering, Hainan
University, Haikou570228, P. R. China
| | - Jianzhong Wu
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California92521, United States
| | - Diannan Lu
- Department
of Chemical Engineering, Tsinghua University, Beijing100084, P. R. China
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5
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Wang Y, Wang G, Bowron DT, Zhu F, Hannon AC, Zhou Y, Liu X, Shi G. Unveiling the structure of aqueous magnesium nitrate solutions by combining X-ray diffraction and theoretical calculations. Phys Chem Chem Phys 2022; 24:22939-22949. [PMID: 36125259 DOI: 10.1039/d2cp01828d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure of aqueous magnesium nitrate solution is gaining significant interest among researchers, especially whether contact ion pairs exist in concentrated solutions. Here, combining X-ray diffraction experiments, quantum chemical calculations and ab initio molecular dynamics simulations, we report that the [Mg(NO3)2] molecular structure in solution from the coexistence of a free [Mg(H2O)6]2+ octahedral supramolecular structure with a free [NO3(H2O)n]- (n = 11-13) supramolecular structure to an [Mg2+(H2O)n(NO3-)m] (n = 3, 4, 5; m = 3, 2, 1) associated structure with increasing concentration. Interestingly, two hydration modes of NO3--the nearest neighbor hydration with a hydration distance less than 3.9 Å and the next nearest neighbor hydration with hydration distance ranging from 3.9 to 4.3 Å-were distinguished. With an increase in the solution concentration, the hydrated NO3- ions lost outer layer water molecules, and the hexagonal octahedral hydration structure of [Mg(H2O)62+] was destroyed, resulting in direct contact between Mg2+ and NO3- ions in a monodentate way. As the concentration of the solution further increased, NO3- ions replaced water molecules in the hydration layer of Mg2+ to form three-ion clusters and even more complex chains or linear ion clusters.
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Affiliation(s)
- Yunxia Wang
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81008, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangguo Wang
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81008, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Daniel T Bowron
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK.
| | - Fayan Zhu
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81008, China. .,ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK.
| | - Alex C Hannon
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK.
| | - Yongquan Zhou
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81008, China.
| | - Xing Liu
- Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China
| | - Guosheng Shi
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81008, China. .,Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China.,Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
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6
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A-site cation influence on the conduction band of lead bromide perovskites. Nat Commun 2022; 13:3839. [PMID: 35787623 PMCID: PMC9253039 DOI: 10.1038/s41467-022-31416-y] [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: 09/16/2021] [Accepted: 06/14/2022] [Indexed: 11/08/2022] Open
Abstract
Hot carrier solar cells hold promise for exceeding the Shockley-Queisser limit. Slow hot carrier cooling is one of the most intriguing properties of lead halide perovskites and distinguishes this class of materials from competing materials used in solar cells. Here we use the element selectivity of high-resolution X-ray spectroscopy and density functional theory to uncover a previously hidden feature in the conduction band states, the σ-π energy splitting, and find that it is strongly influenced by the strength of electronic coupling between the A-cation and bromide-lead sublattice. Our finding provides an alternative mechanism to the commonly discussed polaronic screening and hot phonon bottleneck carrier cooling mechanisms. Our work emphasizes the optoelectronic role of the A-cation, provides a comprehensive view of A-cation effects in the crystal and electronic structures, and outlines a broadly applicable spectroscopic approach for assessing the impact of chemical alterations of the A-cation on perovskite electronic structure.
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7
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García-Fernández A, Svanström S, Sterling CM, Gangan A, Erbing A, Kamal C, Sloboda T, Kammlander B, Man GJ, Rensmo H, Odelius M, Cappel UB. Experimental and Theoretical Core Level and Valence Band Analysis of Clean Perovskite Single Crystal Surfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106450. [PMID: 35122466 DOI: 10.1002/smll.202106450] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Indexed: 06/14/2023]
Abstract
A detailed understanding of the surface and interface properties of lead halide perovskites is of interest for several applications, in which these materials may be used. To develop this understanding, the study of clean crystalline surfaces can be an important stepping stone. In this work, the surface properties and electronic structure of two different perovskite single crystal compositions (MAPbI3 and Csx FA1- x PbI3 ) are investigated using synchrotron-based soft X-ray photoelectron spectroscopy (PES), molecular dynamics simulations, and density functional theory. The use of synchrotron-based soft X-ray PES enables high surface sensitivity and nondestructive depth-profiling. Core level and valence band spectra of the single crystals are presented. The authors find two carbon 1s contributions at the surface of MAPbI3 and assign these to MA+ ions in an MAI-terminated surface and to MA+ ions below the surface. It is estimated that the surface is predominantly MAI-terminated but up to 30% of the surface can be PbI2 -terminated. The results presented here can serve as reference spectra for photoelectron spectroscopy investigations of technologically relevant polycrystalline thin films, and the findings can be utilized to further optimize the design of device interfaces.
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Affiliation(s)
- Alberto García-Fernández
- Division of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Sebastian Svanström
- Condensed Matter Physics of Energy Materials, Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden
| | - Cody M Sterling
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden
| | - Abhijeet Gangan
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden
| | - Axel Erbing
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden
| | - Chinnathambi Kamal
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden
- Theory and Simulations Laboratory, HRDS, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh, 452013, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, Maharashtra, 400094, India
| | - Tamara Sloboda
- Division of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Birgit Kammlander
- Division of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Gabriel J Man
- Condensed Matter Physics of Energy Materials, Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden
| | - Håkan Rensmo
- Condensed Matter Physics of Energy Materials, Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden
| | - Michael Odelius
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden
| | - Ute B Cappel
- Division of Applied Physical Chemistry, Department of Chemistry, KTH - Royal Institute of Technology, Stockholm, SE-100 44, Sweden
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8
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Rajh A, Arčon I, Bučar K, Žitnik M, Petric M, Vizintin A, Bitenc J, Košir U, Dominko R, Gretarsson H, Sundermann M, Kavčič M. Characterization of Electrochemical Processes in Metal-Organic Batteries by X-ray Raman Spectroscopy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:5435-5442. [PMID: 35392436 PMCID: PMC8978279 DOI: 10.1021/acs.jpcc.1c10622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/16/2022] [Indexed: 06/14/2023]
Abstract
X-ray Raman spectroscopy (XRS) is an emerging spectroscopic technique that utilizes inelastic scattering of hard X-rays to study X-ray absorption edges of low Z elements in bulk material. It was used to identify and quantify the amount of carbonyl bonds in a cathode sample, in order to track the redox reaction inside metal-organic batteries during the charge/discharge cycle. XRS was used to record the oxygen K-edge absorption spectra of organic polymer cathodes from different multivalent metal-organic batteries. The amount of carbonyl bond in each sample was determined by modeling the oxygen K-edge XRS spectra with the linear combination of two reference compounds that mimicked the fully charged and the fully discharged phases of the battery. To interpret experimental XRS spectra, theoretical calculations of oxygen K-edge absorption spectra based on density functional theory were performed. Overall, a good agreement between the amount of carbonyl bond present during different stages of battery cycle, calculated from linear combination of standards, and the amount obtained from electrochemical characterization based on measured capacity was achieved. The electrochemical mechanism in all studied batteries was confirmed to be a reduction of double carbonyl bond and the intermediate anion was identified with the help of theoretical calculations. X-ray Raman spectroscopy of the oxygen K-edge was shown to be a viable characterization technique for accurate tracking of the redox reaction inside metal-organic batteries.
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Affiliation(s)
- Ava Rajh
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Ljubljana, Faculty of Mathematics and
Physics, Jadranska ulica
19, 1000 Ljubljana, Slovenia
| | - Iztok Arčon
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia
| | - Klemen Bučar
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Ljubljana, Faculty of Mathematics and
Physics, Jadranska ulica
19, 1000 Ljubljana, Slovenia
| | - Matjaž Žitnik
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Ljubljana, Faculty of Mathematics and
Physics, Jadranska ulica
19, 1000 Ljubljana, Slovenia
| | - Marko Petric
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Zagreb, Faculty of Geotechnical Engineering, Hallerova aleja 7, 42000 Varaždin, Croatia
| | - Alen Vizintin
- National
Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Jan Bitenc
- National
Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Urban Košir
- University
of Ljubljana, Faculty of Chemistry
and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Robert Dominko
- National
Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Hlynur Gretarsson
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Max
Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, D-01187 Dresden, Germany
| | - Martin Sundermann
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Max
Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, D-01187 Dresden, Germany
| | - Matjaž Kavčič
- Jožef
Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- University
of Ljubljana, Faculty of Mathematics and
Physics, Jadranska ulica
19, 1000 Ljubljana, Slovenia
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9
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Akazawa D, Sasaki T, Nagasaka M, Shiga M. X-ray absorption spectra of aqueous cellobiose: Experiment and theory. J Chem Phys 2022; 156:044202. [DOI: 10.1063/5.0078963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Daisuke Akazawa
- Center for Computational Science and e-Systems, Japan Atomic Energy Agency, 178-4-4, Wakashiba, Kashiwa, Chiba 277-0871, Japan
- Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa 277-8561, Japan
| | - Takehiko Sasaki
- Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa 277-8561, Japan
| | | | - Motoyuki Shiga
- Center for Computational Science and e-Systems, Japan Atomic Energy Agency, 178-4-4, Wakashiba, Kashiwa, Chiba 277-0871, Japan
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10
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Yang M, Sissay A, Chen M, Lopata K. Intruder Peak-Free Transient Inner-Shell Spectra Using Real-Time Simulations. J Chem Theory Comput 2022; 18:992-1002. [PMID: 35025498 DOI: 10.1021/acs.jctc.1c00079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Real-time methods are convenient for simulating core-level absorption spectra but suffer from nonphysical intruder peaks when using atom-centered basis sets. In transient absorption spectra, these peaks exhibit highly nonphysical time-dependent modulations in their energies and oscillator strengths. In this paper, we address the origins of these intruder peaks and propose a straightforward and effective solution based on a filtered dipole operator. In combination with real-time time-dependent density functional theory (RT-TDDFT), we demonstrate how to compute intruder-free attosecond transient X-ray absorption spectra for the aminophenol (C6H7NO) oxygen and nitrogen K-edges and the α-quartz (SiO2) silicon L-edge. Without filtering, the computed spectra are qualitatively wrong. This procedure is suitable for both static and transient inner-shell spectroscopy studies and can easily be implemented in a range of real-time methodologies.
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Affiliation(s)
- Mengqi Yang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Adonay Sissay
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Min Chen
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Kenneth Lopata
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States.,Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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11
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Kamal C, Hauschild D, Seitz L, Steininger R, Yang W, Heske C, Weinhardt L, Odelius M. Coupling Methylammonium and Formamidinium Cations with Halide Anions: Hybrid Orbitals, Hydrogen Bonding, and the Role of Dynamics. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:25917-25926. [PMID: 34868447 PMCID: PMC8634158 DOI: 10.1021/acs.jpcc.1c08932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 10/27/2021] [Indexed: 06/13/2023]
Abstract
The electronic structures of four precursors for organic-inorganic hybrid perovskites, namely, methylammonium chloride and iodide, as well as formamidinium bromide and iodide, are investigated by X-ray emission (XE) spectroscopy at the carbon and nitrogen K-edges. The XE spectra are analyzed based on density functional theory calculations. We simulate the XE spectra at the Kohn-Sham level for ground-state geometries and carry out detailed analyses of the molecular orbitals and the electronic density of states to give a thorough understanding of the spectra. Major parts of the spectra can be described by the model of the corresponding isolated organic cation, whereas high-emission energy peaks in the nitrogen K-edge XE spectra arise from electronic transitions involving hybrids of the molecular and atomic orbitals of the cations and halides, respectively. We find that the interaction of the methylammonium cation is stronger with the chlorine than with the iodine anion. Furthermore, our detailed theoretical analysis highlights the strong influence of ultrafast proton dynamics in the core-excited states, which is an intrinsic effect of the XE process. The inclusion of this effect is necessary for an accurate description of the experimental nitrogen K-edge X-ray emission spectra and gives information on the hydrogen-bonding strengths in the different precursor materials.
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Affiliation(s)
- Chinnathambi Kamal
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91 Stockholm, Sweden
- Theory
and Simulations Laboratory, HRDS, Raja Ramanna Centre for Advanced
Technology, Indore 452013, India
- Homi
Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Dirk Hauschild
- Institute
for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
- Department
of Chemistry and Biochemistry, University
of Nevada Las Vegas (UNLV), Las
Vegas, Nevada 89154-4003, United States
| | - Linsey Seitz
- Institute
for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Department
of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Ralph Steininger
- Institute
for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Wanli Yang
- Advanced
Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Clemens Heske
- Institute
for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
- Department
of Chemistry and Biochemistry, University
of Nevada Las Vegas (UNLV), Las
Vegas, Nevada 89154-4003, United States
| | - Lothar Weinhardt
- Institute
for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
- Department
of Chemistry and Biochemistry, University
of Nevada Las Vegas (UNLV), Las
Vegas, Nevada 89154-4003, United States
| | - Michael Odelius
- Department
of Physics, Stockholm University, AlbaNova
University Center, SE-106 91 Stockholm, Sweden
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12
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Electrochemical oxygen reduction reaction at conductive polymer PEDOT: Insight from ab initio molecular dynamics simulations. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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13
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Xu S, Lukes P. Gas-liquid interface influencing electronic structure of phenol based on molecular dynamics simulations and theoretical X-ray absorption spectroscopy. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Reinholdt P, Vidal ML, Kongsted J, Iannuzzi M, Coriani S, Odelius M. Nitrogen K-Edge X-ray Absorption Spectra of Ammonium and Ammonia in Water Solution: Assessing the Performance of Polarizable Embedding Coupled Cluster Methods. J Phys Chem Lett 2021; 12:8865-8871. [PMID: 34498464 PMCID: PMC8450933 DOI: 10.1021/acs.jpclett.1c02031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The recent development of liquid jet and liquid leaf sample delivery systems allows for accurate measurements of soft X-ray absorption spectra in transmission mode of solutes in a liquid environment. As this type of measurement becomes increasingly accessible, there is a strong need for reliable theoretical methods for assisting in the interpretation of the experimental data. Coupled cluster methods have been extensively developed over the past decade to simulate X-ray absorption in the gas phase. Their performance for solvated species, on the contrary, remains largely unexplored. Here, we investigate the current state of the art of coupled cluster modeling of nitrogen K-edge X-ray absorption of aqueous ammonia and ammonium based on quantum mechanics/molecular mechanics, where both the level of coupled cluster calculations and polarizable embedding are scrutinized. The results are compared to existing experimental data as well as simulations based on transition potential density functional theory.
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Affiliation(s)
- Peter Reinholdt
- Institut
for Fysik, Kemi og Farmaci, Syddansk Universitet, DK-5230 Odense, Denmark
| | - Marta L. Vidal
- DTU
Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
| | - Jacob Kongsted
- Institut
for Fysik, Kemi og Farmaci, Syddansk Universitet, DK-5230 Odense, Denmark
| | - Marcella Iannuzzi
- Physical
Chemistry Institute, University of Zürich, 8057 Zürich, Switzerland
| | - Sonia Coriani
- DTU
Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
| | - Michael Odelius
- Department
of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
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15
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Wilks RG, Erbing A, Sadoughi G, Starr DE, Handick E, Meyer F, Benkert A, Iannuzzi M, Hauschild D, Yang W, Blum M, Weinhardt L, Heske C, Snaith HJ, Odelius M, Bär M. Dynamic Effects and Hydrogen Bonding in Mixed-Halide Perovskite Solar Cell Absorbers. J Phys Chem Lett 2021; 12:3885-3890. [PMID: 33856793 DOI: 10.1021/acs.jpclett.1c00745] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The organic component (methylammonium) of CH3NH3PbI3-xClx-based perovskites shows electronic hybridization with the inorganic framework via H-bonding between N and I sites. Femtosecond dynamics induced by core excitation are shown to strongly influence the measured X-ray emission spectra and the resonant inelastic soft X-ray scattering of the organic components. The N K core excitation leads to a greatly increased N-H bond length that modifies and strengthens the interaction with the inorganic framework compared to that in the ground state. The study indicates that excited-state dynamics must be accounted for in spectroscopic studies of this perovskite solar cell material, and the organic-inorganic hybridization interaction suggests new avenues for probing the electronic structure of this class of materials. It is incidentally shown that beam damage to the methylamine component can be avoided by moving the sample under the soft X-ray beam to minimize exposure and that this procedure is necessary to prevent the creation of experimental artifacts.
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Affiliation(s)
- Regan G Wilks
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), 14109 Berlin, Germany
| | - Axel Erbing
- Department of Physics, Stockholm University, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Golnaz Sadoughi
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford OX1 3PJ, U.K
| | - David E Starr
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), 14109 Berlin, Germany
| | - Evelyn Handick
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), 14109 Berlin, Germany
| | - Frank Meyer
- Experimental Physics 7, University of Würzburg, 97074 Würzburg, Germany
| | - Andreas Benkert
- Experimental Physics 7, University of Würzburg, 97074 Würzburg, Germany
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Marcella Iannuzzi
- Physical Chemistry Institute, University of Zürich, 8057 Zürich, Switzerland
| | - Dirk Hauschild
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, United States
| | - Wanli Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
| | - Monika Blum
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, United States
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8176, United States
| | - Lothar Weinhardt
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, United States
| | - Clemens Heske
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, United States
| | - Henry J Snaith
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford OX1 3PJ, U.K
| | - Michael Odelius
- Department of Physics, Stockholm University, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Marcus Bär
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), 14109 Berlin, Germany
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (HI ERN), 90429 Nürnberg, Germany
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
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16
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Sterling CM, Kamal C, Man GJ, Nayak PK, Simonov KA, Svanström S, García-Fernández A, Huthwelker T, Cappel UB, Butorin SM, Rensmo H, Odelius M. Sensitivity of Nitrogen K-Edge X-ray Absorption to Halide Substitution and Thermal Fluctuations in Methylammonium Lead-Halide Perovskites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:8360-8368. [PMID: 34084262 PMCID: PMC8162417 DOI: 10.1021/acs.jpcc.1c02017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 03/24/2021] [Indexed: 06/12/2023]
Abstract
The performance of hybrid perovskite materials in solar cells crucially depends on their electronic properties, and it is important to investigate contributions to the total electronic structure from specific components in the material. In a combined theoretical and experimental study of CH3NH3PbI3-methylammonium lead triiodide (MAPI)-and its bromide cousin CH3NH3PbBr3 (MAPB), we analyze nitrogen K-edge (N 1s-to-2p*) X-ray absorption (XA) spectra measured in MAPI and MAPB single crystals. This permits comparison of spectral features to the local character of unoccupied molecular orbitals on the CH3NH3 + (MA+) counterions and allows us to investigate how thermal fluctuations, hydrogen bonding, and halide-ion substitution influence the XA spectra as a measure of the local electronic structure. In agreement with the experiment, the simulated spectra for MAPI and MAPB show close similarity, except that the MAPB spectral features are blue-shifted by +0.31 eV. The shift is shown to arise from the intrinsic difference in the electronic structure of the two halide atoms rather than from structural differences between the materials. In addition, from the spectral sampling analysis of molecular dynamics simulations, clear correlations between geometric descriptors (N-C, N-H, and H···I/Br distances) and spectral features are identified and used to explain the spectral shapes.
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Affiliation(s)
- Cody M. Sterling
- Department
of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden
| | - Chinnathambi Kamal
- Department
of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden
- Theory
and Simulations Laboratory, HRDS, Raja Ramanna
Centre for Advanced Technology, 452013 Indore, India
| | - Gabriel J. Man
- Department
of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Pabitra K. Nayak
- TIFR
Centre for Interdisciplinary Sciences, Tata
Institute of Fundamental Research, 36/P,
Gopanpally Village, Serilingampally Mandal, 500046 Hyderabad, India
| | - Konstantin A. Simonov
- Department
of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Sebastian Svanström
- Department
of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Alberto García-Fernández
- Division
of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Thomas Huthwelker
- Swiss Light
Source, Paul Scherrer Institut, WLGA/212, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Ute B. Cappel
- Division
of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Sergei M. Butorin
- Department
of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Håkan Rensmo
- Department
of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Michael Odelius
- Department
of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden
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17
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Yi J, Nakatani N, Nomura K. Solution XANES and EXAFS analysis of active species of titanium, vanadium complex catalysts in ethylene polymerisation/dimerisation and syndiospecific styrene polymerisation. Dalton Trans 2020; 49:8008-8028. [PMID: 32432279 DOI: 10.1039/d0dt01139h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Mechanistic studies in homogeneous catalysis through the solution transition metal K Edge XANES (X-ray absorption near-edge structure) and EXAFS (Extended X-ray absorption fine structure) analysis for vanadium and titanium complex catalysts for ethylene polymerisation/dimerization, and syndiospecific styrene polymerisation, including interpretation of the XANES spectra, have been introduced. The core excitation spectra of the complexes based on the time-dependent density functional theory (TD-DFT) can be used to interpret the Ti and V K-edge features and to extract information on the electronic structure from the XANES spectra. Theoretical calculations and experimental XAS analysis should have great potential for analysing the active species.
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Affiliation(s)
- Jun Yi
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan.
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18
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Kühne TD, Iannuzzi M, Del Ben M, Rybkin VV, Seewald P, Stein F, Laino T, Khaliullin RZ, Schütt O, Schiffmann F, Golze D, Wilhelm J, Chulkov S, Bani-Hashemian MH, Weber V, Borštnik U, Taillefumier M, Jakobovits AS, Lazzaro A, Pabst H, Müller T, Schade R, Guidon M, Andermatt S, Holmberg N, Schenter GK, Hehn A, Bussy A, Belleflamme F, Tabacchi G, Glöß A, Lass M, Bethune I, Mundy CJ, Plessl C, Watkins M, VandeVondele J, Krack M, Hutter J. CP2K: An electronic structure and molecular dynamics software package - Quickstep: Efficient and accurate electronic structure calculations. J Chem Phys 2020; 152:194103. [PMID: 33687235 DOI: 10.1063/5.0007045] [Citation(s) in RCA: 924] [Impact Index Per Article: 231.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
CP2K is an open source electronic structure and molecular dynamics software package to perform atomistic simulations of solid-state, liquid, molecular, and biological systems. It is especially aimed at massively parallel and linear-scaling electronic structure methods and state-of-the-art ab initio molecular dynamics simulations. Excellent performance for electronic structure calculations is achieved using novel algorithms implemented for modern high-performance computing systems. This review revisits the main capabilities of CP2K to perform efficient and accurate electronic structure simulations. The emphasis is put on density functional theory and multiple post-Hartree-Fock methods using the Gaussian and plane wave approach and its augmented all-electron extension.
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Affiliation(s)
- Thomas D Kühne
- Dynamics of Condensed Matter and Center for Sustainable Systems Design, Chair of Theoretical Chemistry, Paderborn University, Warburger Str. 100, D-33098 Paderborn, Germany
| | - Marcella Iannuzzi
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Mauro Del Ben
- Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Vladimir V Rybkin
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Patrick Seewald
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Frederick Stein
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Teodoro Laino
- IBM Research Europe, CH-8803 Rüschlikon, Switzerland
| | - Rustam Z Khaliullin
- Department of Chemistry, McGill University, CH-801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada
| | - Ole Schütt
- Department of Materials, ETH Zürich, CH-8092 Zürich, Switzerland
| | | | - Dorothea Golze
- Department of Applied Physics, Aalto University, Otakaari 1, FI-02150 Espoo, Finland
| | - Jan Wilhelm
- Institute of Theoretical Physics, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
| | - Sergey Chulkov
- School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln, United Kingdom
| | | | - Valéry Weber
- IBM Research Europe, CH-8803 Rüschlikon, Switzerland
| | | | | | | | | | - Hans Pabst
- Intel Extreme Computing, Software and Systems, Zürich, Switzerland
| | - Tiziano Müller
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Robert Schade
- Department of Computer Science and Paderborn Center for Parallel Computing, Paderborn University, Warburger Str. 100, D-33098 Paderborn, Germany
| | - Manuel Guidon
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Samuel Andermatt
- Integrated Systems Laboratory, ETH Zürich, CH-8092 Zürich, Switzerland
| | - Nico Holmberg
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, 00076 Aalto, Finland
| | - Gregory K Schenter
- Physical Science Division, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA
| | - Anna Hehn
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Augustin Bussy
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Fabian Belleflamme
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Gloria Tabacchi
- Department of Science and High Technology, University of Insubria and INSTM, via Valleggio 9, I-22100 Como, Italy
| | - Andreas Glöß
- BASF SE, Carl-Bosch-Straße 38, D-67056 Ludwigshafen am Rhein, Germany
| | - Michael Lass
- Department of Computer Science and Paderborn Center for Parallel Computing, Paderborn University, Warburger Str. 100, D-33098 Paderborn, Germany
| | - Iain Bethune
- Hartree Centre, Science and Technology Facilities Council, Sci-Tech Daresbury, Warrington WA4 4AD, United Kingdom
| | - Christopher J Mundy
- Physical Science Division, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA
| | - Christian Plessl
- Department of Computer Science and Paderborn Center for Parallel Computing, Paderborn University, Warburger Str. 100, D-33098 Paderborn, Germany
| | - Matt Watkins
- School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln, United Kingdom
| | - Joost VandeVondele
- Swiss National Supercomputing Centre (CSCS), ETH Zürich, Zürich, Switzerland
| | - Matthias Krack
- Laboratory for Scientific Computing and Modelling, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - Jürg Hutter
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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19
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Tu Y, Liu H, Shi G, Zhang F, Su T, Wu Y, Sun J, Zhang L, Zhang S, Fang H. Selectivity mechanism of magnesium and calcium in cation-binding pocket structures of phosphotyrosine. Phys Rev E 2020; 101:022410. [PMID: 32168574 DOI: 10.1103/physreve.101.022410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/27/2020] [Indexed: 11/07/2022]
Abstract
Magnesium (Mg^{2+}) and calcium (Ca^{2+}) are of essential importance in biological activity, but the molecular understanding of their selectivity is still lacking. Here, based on density functional theory calculations and ab initio molecular dynamics simulations, we show that Mg^{2+} binds more tightly to phosphotyrosine (pTyr) and stabilizes the conformation of pTyr, while Ca^{2+} binds more flexibly to pTyr with less structural stability. The key for the selectivity is attributed to the cation-π interactions between the hydrated cations and the aromatic ring together with the synergic interaction between the cations and the side groups in pTyr to form a cation-binding pocket structure, which we refer as side-group-synergetic hydrated cation-π interaction. The existence and relative strength of the cation-π interactions in the pocket structures as well as their structural stability have been demonstrated experimentally with ultraviolet (UV) absorption spectra and ^{1}H NMR spectra. The findings offer insight into understanding the selectivity of Mg^{2+} and Ca^{2+} in a variety of biochemical and physiological essential processes.
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Affiliation(s)
- Yusong Tu
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.,Key Laboratory of Polar Materials and Devices, Ministry of Education, College of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Huadong Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guosheng Shi
- Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China
| | - Fengmin Zhang
- Testing Center, Yangzhou University, Jiangsu 225009, China
| | - Tian Su
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yuanyan Wu
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China
| | - Jiajia Sun
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China
| | - Lei Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shengli Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi'an Jiaotong University, Xi'an 710049, China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,School of Science, East China University of Science and Technology, Shanghai 200237, China
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20
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Elgabarty H, Kühne TD. Tumbling with a limp: local asymmetry in water's hydrogen bond network and its consequences. Phys Chem Chem Phys 2020; 22:10397-10411. [DOI: 10.1039/c9cp06960g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ab initio molecular dynamics simulations of ambient liquid water and energy decomposition analysis have recently shown that water molecules exhibit significant asymmetry between the strengths of the two donor and/or the two acceptor interactions.
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Affiliation(s)
- Hossam Elgabarty
- Dynamics of Condensed Matter and Center for Sustainable Systems Design
- Chair of Theoretical Chemistry
- University of Paderborn
- Paderborn
- Germany
| | - Thomas D. Kühne
- Dynamics of Condensed Matter and Center for Sustainable Systems Design
- Chair of Theoretical Chemistry
- University of Paderborn
- Paderborn
- Germany
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21
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Norell J, Eckert S, Van Kuiken BE, Föhlisch A, Odelius M. Ab initio simulations of complementary K-edges and solvatization effects for detection of proton transfer in aqueous 2-thiopyridone. J Chem Phys 2019; 151:114117. [PMID: 31542028 DOI: 10.1063/1.5109840] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- J. Norell
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - S. Eckert
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
| | | | - A. Föhlisch
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - M. Odelius
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
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22
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Hemmi A, Cun H, Tocci G, Epprecht A, Stel B, Lingenfelder M, de Lima LH, Muntwiler M, Osterwalder J, Iannuzzi M, Greber T. Catalyst Proximity-Induced Functionalization of h-BN with Quat Derivatives. NANO LETTERS 2019; 19:5998-6004. [PMID: 31408608 DOI: 10.1021/acs.nanolett.9b01792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inert single-layer boron nitride (h-BN) grown on a catalytic metal may be functionalized with quaternary ammonium compounds (quats) that are widely used as nonreactive electrolytes. We observe that the quat treatment, which facilitates the electrochemical transfer of two-dimensional materials, involves a decomposition of quat ions and leads to covalently bound quat derivatives on top of the 2D layer. Applying tetraoctylammonium and h-BN on rhodium, the reaction product is top-alkylized h-BN as identified with high-resolution X-ray photoelectron spectroscopy. The alkyl chains are homogeneously distributed across the surface, and the properties thereof are well-tunable by the choice of different quats. The functionalization further weakens the 2D material-substrate interaction and promotes easy transfer. Therefore, the functionalization scheme that is presented enables the design of 2D materials with tailored properties and with the freedom to position and orient them as required. The mechanism of this functionalization route is investigated with density functional theory calculations, and we identify the proximity of the catalytic metal substrate to alter the chemical reactivity of otherwise inert h-BN layers.
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Affiliation(s)
| | | | | | | | | | | | - Luis Henrique de Lima
- Swiss Light Source, Paul Scherrer Institut , 5232 Villigen PSI , Switzerland
- Centro de Ciências Naturais e Humanas , Universidade Federal do ABC , 09210-580 , Santo André , Brazil
| | - Matthias Muntwiler
- Swiss Light Source, Paul Scherrer Institut , 5232 Villigen PSI , Switzerland
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23
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Bolognesi P, Carravetta V, Sementa L, Barcaro G, Monti S, Manjari Mishra P, Cartoni A, Castrovilli MC, Chiarinelli J, Tosic S, Marinkovic BP, Richter R, Avaldi L. Core Shell Investigation of 2-nitroimidazole. Front Chem 2019; 7:151. [PMID: 31001511 PMCID: PMC6454003 DOI: 10.3389/fchem.2019.00151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 02/28/2019] [Indexed: 02/01/2023] Open
Abstract
Tunability and selectivity of synchrotron radiation have been used to study the excitation and ionization of 2-nitroimidazole at the C, N, and O K-edges. The combination of a set of different measurements (X-ray photoelectron spectroscopy, near-edge photoabsorption spectroscopy, Resonant Auger electron spectroscopy, and mass spectrometry) and computational modeling have successfully disclosed local effects due to the chemical environment on both excitation/ionization and fragmentation of the molecule.
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Affiliation(s)
- Paola Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
| | | | - Luca Sementa
- CNR-Istituto per i Processi Chimico Fisici, Pisa, Italy
| | | | - Susanna Monti
- CNR-Istituto di Chimica dei Composti Organo Metallici, Pisa, Italy
| | - Preeti Manjari Mishra
- Stored and Cooled Ions Division, Max Planck Institute for Nuclear Physics, Heidelberg, Germany
| | - Antonella Cartoni
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy.,Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Mattea C Castrovilli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
| | - Jacopo Chiarinelli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy.,Dipartimento di Scienze, Università degli Studi di Roma 3, Rome, Italy
| | - Sanja Tosic
- Institute of Physics, University of Belgrade, Belgrade, Serbia
| | | | - Robert Richter
- Elettra Sincrotrone Trieste, Area Science Park, Trieste, Italy
| | - Lorenzo Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
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24
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Ding Y. Ab initio molecular dynamics investigation on NaCl solution at diluted concentration. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Probing hydrogen bond strength in liquid water by resonant inelastic X-ray scattering. Nat Commun 2019; 10:1013. [PMID: 30833573 PMCID: PMC6399250 DOI: 10.1038/s41467-019-08979-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 02/13/2019] [Indexed: 11/09/2022] Open
Abstract
Local probes of the electronic ground state are essential for understanding hydrogen bonding in aqueous environments. When tuned to the dissociative core-excited state at the O1s pre-edge of water, resonant inelastic X-ray scattering back to the electronic ground state exhibits a long vibrational progression due to ultrafast nuclear dynamics. We show how the coherent evolution of the OH bonds around the core-excited oxygen provides access to high vibrational levels in liquid water. The OH bonds stretch into the long-range part of the potential energy curve, which makes the X-ray probe more sensitive than infra-red spectroscopy to the local environment. We exploit this property to effectively probe hydrogen bond strength via the distribution of intramolecular OH potentials derived from measurements. In contrast, the dynamical splitting in the spectral feature of the lowest valence-excited state arises from the short-range part of the OH potential curve and is rather insensitive to hydrogen bonding.
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26
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Müller P, Karhan K, Krack M, Gerstmann U, Schmidt WG, Bauer M, Kühne TD. Impact of finite-temperature and condensed-phase effects on theoretical X-ray absorption spectra of transition metal complexes. J Comput Chem 2018; 40:712-716. [PMID: 30306614 DOI: 10.1002/jcc.25641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 08/20/2018] [Accepted: 09/18/2018] [Indexed: 11/09/2022]
Abstract
The impact of condensed-phase and finite-temperature effects on the theoretical X-ray absorption spectra of transition metal complexes is assessed. The former are included in terms of the all-electron Gaussian and augmented plane-wave approach, whereas the latter are taken into account by extensive ensemble averaging along second-generation Car-Parrinello ab initio molecular dynamics trajectories. We find that employing the periodic boundary conditions and including finite-temperature effects systematically improves the agreement between our simulated X-ray absorption spectra and experimental measurements. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Patrick Müller
- Department of Chemistry, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
| | - Kristof Karhan
- Department of Chemistry, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
| | - Matthias Krack
- Laboratory for Scientific Computing and Modelling, Paul Scherrer Institut, CH-5232, Villigen PSI, Switzerland
| | - Uwe Gerstmann
- Department of Physics, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
| | - Wolf Gero Schmidt
- Department of Physics, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
| | - Thomas D Kühne
- Department of Chemistry and Center for Sustainable Systems Design, University of Paderborn, Warburger Str. 100, 33098, Paderborn, Germany
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27
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Tenorio BNC, Oliveira RR, Nascimento MAC, Rocha AB. Coupled Cluster and Time-Dependent Density Functional Theory Description of Inner Shell Photoabsorption Cross Sections of Molecules. J Chem Theory Comput 2018; 14:5324-5338. [DOI: 10.1021/acs.jctc.8b00375] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bruno Nunes Cabral Tenorio
- UFRJ - Universidade Federal do Rio de Janeiro, Instituto
de Química, Av. Athos da Silveira Ramos, 149, Rio de Janeiro 21941-909, Brasil
| | - Ricardo Rodrigues Oliveira
- UFRJ - Universidade Federal do Rio de Janeiro, Instituto
de Química, Av. Athos da Silveira Ramos, 149, Rio de Janeiro 21941-909, Brasil
| | - Marco Antonio Chaer Nascimento
- UFRJ - Universidade Federal do Rio de Janeiro, Instituto
de Química, Av. Athos da Silveira Ramos, 149, Rio de Janeiro 21941-909, Brasil
| | - Alexandre Braga Rocha
- UFRJ - Universidade Federal do Rio de Janeiro, Instituto
de Química, Av. Athos da Silveira Ramos, 149, Rio de Janeiro 21941-909, Brasil
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28
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Golze D, Wilhelm J, van Setten MJ, Rinke P. Core-Level Binding Energies from GW: An Efficient Full-Frequency Approach within a Localized Basis. J Chem Theory Comput 2018; 14:4856-4869. [DOI: 10.1021/acs.jctc.8b00458] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dorothea Golze
- Department of Applied Physics, Aalto University, Otakaari 1, FI-02150 Espoo, Finland
- Department of Electrical Engineering and Automation, Aalto University, PO Box 13500, 00076 Aalto, Finland
| | - Jan Wilhelm
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Michiel J. van Setten
- Nanoscopic Physics, Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Patrick Rinke
- Department of Applied Physics, Aalto University, Otakaari 1, FI-02150 Espoo, Finland
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29
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Ekimova M, Kubin M, Ochmann M, Ludwig J, Huse N, Wernet P, Odelius M, Nibbering ETJ. Soft X-ray Spectroscopy of the Amine Group: Hydrogen Bond Motifs in Alkylamine/Alkylammonium Acid-Base Pairs. J Phys Chem B 2018; 122:7737-7746. [PMID: 30024171 DOI: 10.1021/acs.jpcb.8b05424] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We use N K-edge absorption spectroscopy to explore the electronic structure of the amine group, one of the most prototypical chemical functionalities playing a key role in acid-base chemistry, electron donor-acceptor interactions, and nucleophilic substitution reactions. In this study, we focus on aliphatic amines and make use of the nitrogen 1s core electron excitations to elucidate the roles of N-H σ* and N-C σ* contributions in the unoccupied orbitals. We have measured N K-edge absorption spectra of the ethylamine bases Et xNH3- x ( x = 0...3; Et- = C2H5-) and the conjugate positively charged ethylammonium cation acids Et yNH4- y+ ( y = 0...4; Et- = C2H5-) dissolved in the protic solvents ethanol and water. Upon consecutive exchange of N-H for ethyl-groups, we observe a spectral shift, a systematic decrease of the N K-edge pre-edge peak, and a major contribution in the post-edge region for the ethylamine series. Instead, for the ethylammonium ions, the consecutive exchange of N-H for ethyl groups leads to an apparent reduction of pre-edge and post-edge intensities relative to the main-edge band, without significant frequency shifts. Building on findings from our previously reported study on aqueous ammonia and ammonium ions, we can rationalize these observations by comparing calculated N K-edge absorption spectra of free and hydrogen-bonded clusters. Hydrogen bonding interactions lead only to minor spectral effects in the ethylamine series, but have a large impact in the ethylammonium ion series. Visualization of the unoccupied molecular orbitals shows the consecutive change in molecular orbital character from N-H σ* to N-C σ* in these alkylamine/alkylammonium ion series. This can act as a benchmark for future studies on chemically more involved amine compounds.
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Affiliation(s)
- Maria Ekimova
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy , Max Born Strasse 2A , 12489 Berlin , Germany
| | - Markus Kubin
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15 , 12489 Berlin , Germany
| | - Miguel Ochmann
- Institute for Nanostructure and Solid State Physics , Center for Free-Electron Laser Science , Luruper Chaussee 149 , 22761 Hamburg , Germany
| | - Jan Ludwig
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15 , 12489 Berlin , Germany
| | - Nils Huse
- Institute for Nanostructure and Solid State Physics , Center for Free-Electron Laser Science , Luruper Chaussee 149 , 22761 Hamburg , Germany
| | - Philippe Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15 , 12489 Berlin , Germany
| | - Michael Odelius
- Department of Physics, AlbaNova University Center , Stockholm University , 106 91 Stockholm , Sweden
| | - Erik T J Nibbering
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy , Max Born Strasse 2A , 12489 Berlin , Germany
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30
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Zhovtobriukh I, Besley NA, Fransson T, Nilsson A, Pettersson LGM. Relationship between x-ray emission and absorption spectroscopy and the local H-bond environment in water. J Chem Phys 2018; 148:144507. [DOI: 10.1063/1.5009457] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Iurii Zhovtobriukh
- FYSIKUM, Stockholm University, Albanova University Center, SE-106 91 Stockholm, Sweden
| | - Nicholas A. Besley
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Thomas Fransson
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025,
USA
| | - Anders Nilsson
- FYSIKUM, Stockholm University, Albanova University Center, SE-106 91 Stockholm, Sweden
| | - Lars G. M. Pettersson
- FYSIKUM, Stockholm University, Albanova University Center, SE-106 91 Stockholm, Sweden
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31
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Niskanen J, Kooser K, Koskelo J, Käämbre T, Kunnus K, Pietzsch A, Quevedo W, Hakala M, Föhlisch A, Huotari S, Kukk E. Density functional simulation of resonant inelastic X-ray scattering experiments in liquids: acetonitrile. Phys Chem Chem Phys 2018; 18:26026-26032. [PMID: 27711595 DOI: 10.1039/c6cp03220f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper we report an experimental and computational study of liquid acetonitrile (H3C-C[triple bond, length as m-dash]N) by resonant inelastic X-ray scattering (RIXS) at the N K-edge. The experimental spectra exhibit clear signatures of the electronic structure of the valence states at the N site and incident-beam-polarization dependence is observed as well. Moreover, we find fine structure in the quasielastic line that is assigned to finite scattering duration and nuclear relaxation. We present a simple and light-to-evaluate model for the RIXS maps and analyze the experimental data using this model combined with ab initio molecular dynamics simulations. In addition to polarization-dependence and scattering-duration effects, we pinpoint the effects of different types of chemical bonding to the RIXS spectrum and conclude that the H2C-C[double bond, length as m-dash]NH isomer, suggested in the literature, does not exist in detectable quantities. We study solution effects on the scattering spectra with simulations in liquid and in vacuum. The presented model for RIXS proved to be light enough to allow phase-space-sampling and still accurate enough for identification of transition lines in physical chemistry research by RIXS.
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Affiliation(s)
- Johannes Niskanen
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin for Materials and Energy, Albert-Einstein-Str 15, D-12489, Berlin, Germany. and Department of Physics, University of Helsinki, Gustav Hällströmin katu 2a, FI-00014, Helsinki, Finland
| | - Kuno Kooser
- Department of Physics and Astronomy, University of Turku, Vesilinnantie 5, FI-20014 Turku, Finland and Institute of Physics, University of Tartu, W. Ostwaldi 1, EE-50411 Tartu, Estonia
| | - Jaakko Koskelo
- Department of Physics, University of Helsinki, Gustav Hällströmin katu 2a, FI-00014, Helsinki, Finland
| | - Tanel Käämbre
- Institute of Physics, University of Tartu, W. Ostwaldi 1, EE-50411 Tartu, Estonia
| | - Kristjan Kunnus
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin for Materials and Energy, Albert-Einstein-Str 15, D-12489, Berlin, Germany. and Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D-14476 Potsdam, Germany
| | - Annette Pietzsch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin for Materials and Energy, Albert-Einstein-Str 15, D-12489, Berlin, Germany.
| | - Wilson Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin for Materials and Energy, Albert-Einstein-Str 15, D-12489, Berlin, Germany.
| | - Mikko Hakala
- Department of Physics, University of Helsinki, Gustav Hällströmin katu 2a, FI-00014, Helsinki, Finland
| | - Alexander Föhlisch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin for Materials and Energy, Albert-Einstein-Str 15, D-12489, Berlin, Germany. and Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D-14476 Potsdam, Germany
| | - Simo Huotari
- Department of Physics, University of Helsinki, Gustav Hällströmin katu 2a, FI-00014, Helsinki, Finland
| | - Edwin Kukk
- Department of Physics and Astronomy, University of Turku, Vesilinnantie 5, FI-20014 Turku, Finland
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32
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Hitchcock AP. Influence of Local Environment on Inner Shell Excitation Spectra, Studied by Electron and X-ray Spectroscopy and Spectromicroscopy. Z PHYS CHEM 2017. [DOI: 10.1515/zpch-2017-1061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Inner shell excitation spectroscopy is a local probe of the unoccupied electronic structure in the immediate vicinity of the core excited atom. As such, one might expect the inner shell spectrum of a given unit (a molecular fragment or a repeat unit of a solid) to be largely independent of where that unit is located. This is often an implicit assumption in spectral analysis and analytical applications. However, there are situations where inner shell excitation spectra exhibit significant sensitivity to their local environment. Here I categorize the ways in which inner shell spectra are affected by their local environment, and give examples from a career dedicated to developing a better understanding of inner shell excitation spectroscopy, its experimental techniques, and applications.
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Affiliation(s)
- Adam P. Hitchcock
- Department of Chemistry and Chemical Biology , McMaster University , Hamilton, ON L8S 4M1 , Canada , Phone: +1 905 525-9140
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33
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Ekimova M, Quevedo W, Szyc Ł, Iannuzzi M, Wernet P, Odelius M, Nibbering ETJ. Aqueous Solvation of Ammonia and Ammonium: Probing Hydrogen Bond Motifs with FT-IR and Soft X-ray Spectroscopy. J Am Chem Soc 2017; 139:12773-12783. [PMID: 28810120 DOI: 10.1021/jacs.7b07207] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In a multifaceted investigation combining local soft X-ray and vibrational spectroscopic probes with ab initio molecular dynamics simulations, hydrogen-bonding interactions of two key principal amine compounds in aqueous solution, ammonia (NH3) and ammonium ion (NH4+), are quantitatively assessed in terms of electronic structure, solvation structure, and dynamics. From the X-ray measurements and complementary determination of the IR-active hydrogen stretching and bending modes of NH3 and NH4+ in aqueous solution, the picture emerges of a comparatively strongly hydrogen-bonded NH4+ ion via N-H donating interactions, whereas NH3 has a strongly accepting hydrogen bond with one water molecule at the nitrogen lone pair but only weakly N-H donating hydrogen bonds. In contrast to the case of hydrogen bonding among solvent water molecules, we find that energy mismatch between occupied orbitals of both the solutes NH3 and NH4+ and the surrounding water prevents strong mixing between orbitals upon hydrogen bonding and, thus, inhibits substantial charge transfer between solute and solvent. A close inspection of the calculated unoccupied molecular orbitals, in conjunction with experimentally measured N K-edge absorption spectra, reveals the different nature of the electronic structural effects of these two key principal amine compounds imposed by hydrogen bonding to water, where a pH-dependent excitation energy appears to be an intrinsic property. These results provide a benchmark for hydrogen bonding of other nitrogen-containing acids and bases.
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Affiliation(s)
- Maria Ekimova
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy , Max Born Strasse 2A, 12489 Berlin, Germany
| | - Wilson Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Łukasz Szyc
- Magnosco c/o LTB Lasertechnik Berlin GmbH , Am Studio 2c, 12489 Berlin, Germany
| | - Marcella Iannuzzi
- Institute of Physical Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Philippe Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Michael Odelius
- Department of Physics, Stockholm University , AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Erik T J Nibbering
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy , Max Born Strasse 2A, 12489 Berlin, Germany
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34
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Pinto de Magalhães H, Brennwald MS, Kipfer R. Diverging effects of isotopic fractionation upon molecular diffusion of noble gases in water: mechanistic insights through ab initio molecular dynamics simulations. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2017; 19:405-413. [PMID: 28186521 DOI: 10.1039/c6em00614k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Atmospheric noble gases are routinely used as natural tracers to analyze gas transfer processes in aquatic systems. Their isotopic ratios can be employed to discriminate between different physical transport mechanisms by comparison to the unfractionated atmospheric isotope composition. In many applications of aquatic systems molecular diffusion was thought to cause a mass dependent fractionation of noble gases and their isotopes according to the square root ratio of their masses. However, recent experiments focusing on isotopic fractionation within a single element challenged this broadly accepted assumption. The determined fractionation factors of Ne, Ar, Kr and Xe isotopes revealed that only Ar follows the prediction of the so-called square root relation, whereas within the Ne, Kr and Xe elements no mass-dependence was found. The reason for this unexpected divergence of Ar is not yet understood. The aim of our computational exercise is to establish the molecular-resolved mechanisms behind molecular diffusion of noble gases in water. We make the hypothesis that weak intermolecular interactions are relevant for the dynamical properties of noble gases dissolved in water. Therefore, we used ab initio molecular dynamics to explicitly account for the electronic degrees of freedom. Depending on the size and polarizability of the hydrophobic particles such as noble gases, their motion in dense and polar liquids like water is subject to different diffusive regimes: the inter-cavity hopping mechanism of small particles (He, Ne) breaks down if a critical particle size achieved. For the case of large particles (Kr, Xe), the motion through the water solvent is governed by mass-independent viscous friction leading to hydrodynamical diffusion. Finally, Ar falls in between the two diffusive regimes, where particle dispersion is propagated at the molecular collision time scale of the surrounding water molecules.
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Affiliation(s)
- Halua Pinto de Magalhães
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Water Resources and Drinking Water, 8600 Duebendorf, Switzerland
| | - Matthias S Brennwald
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Water Resources and Drinking Water, 8600 Duebendorf, Switzerland
| | - Rolf Kipfer
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Water Resources and Drinking Water, 8600 Duebendorf, Switzerland and ETH Zurich, Institute of Biogeochemistry and Pollution Dynamics, 8092 Zurich, Switzerland and ETH Zurich, Institute of Geochemistry and Petrology, 8092 Zurich, Switzerland
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35
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Niskanen J, Sahle CJ, Ruotsalainen KO, Müller H, Kavčič M, Žitnik M, Bučar K, Petric M, Hakala M, Huotari S. Sulphur Kβ emission spectra reveal protonation states of aqueous sulfuric acid. Sci Rep 2016; 6:21012. [PMID: 26888159 PMCID: PMC4757876 DOI: 10.1038/srep21012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 01/14/2016] [Indexed: 11/08/2022] Open
Abstract
In this paper we report an X-ray emission study of bulk aqueous sulfuric acid. Throughout the range of molarities from 1 M to 18 M the sulfur Kβ emission spectra from H2SO4 (aq) depend on the molar fractions and related deprotonation of H2SO4. We compare the experimental results with results from emission spectrum calculations based on atomic structures of single molecules and structures from ab initio molecular dynamics simulations. We show that the S Kβ emission spectrum is a sensitive probe of the protonation state of the acid molecules. Using non-negative matrix factorization we are able to extract the fractions of different protonation states in the spectra, and the results are in good agreement with the simulation for the higher part of the concentration range.
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Affiliation(s)
- Johannes Niskanen
- University of Helsinki, Department of Physics, Helsinki, FI-00014, Finland
| | - Christoph J. Sahle
- University of Helsinki, Department of Physics, Helsinki, FI-00014, Finland
- European Synchrotron Radiation Facility, ESRF, Grenoble, France
| | | | - Harald Müller
- European Synchrotron Radiation Facility, ESRF, Grenoble, France
| | - Matjaž Kavčič
- Jožef Stefan Institute, Jamova cesta 39, SI-1001 Ljubljana, Slovenia
| | - Matjaž Žitnik
- Jožef Stefan Institute, Jamova cesta 39, SI-1001 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska ulica 19, Ljubljana, Slovenia
| | - Klemen Bučar
- Jožef Stefan Institute, Jamova cesta 39, SI-1001 Ljubljana, Slovenia
| | - Marko Petric
- Jožef Stefan Institute, Jamova cesta 39, SI-1001 Ljubljana, Slovenia
| | - Mikko Hakala
- University of Helsinki, Department of Physics, Helsinki, FI-00014, Finland
| | - Simo Huotari
- University of Helsinki, Department of Physics, Helsinki, FI-00014, Finland
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36
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Ehlert C, Holzweber M, Lippitz A, Unger WES, Saalfrank P. A detailed assignment of NEXAFS resonances of imidazolium based ionic liquids. Phys Chem Chem Phys 2016; 18:8654-61. [DOI: 10.1039/c5cp07434g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Experimental and theoretical investigation of Near Edge Absorption Fine Structure (NEXAFS) resonances of two kinds of imidazolium based ionic Liquids.
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Affiliation(s)
- Christopher Ehlert
- BAM Bundesanstalt für Materialforschung und –prüfung
- D-12203 Berlin
- Germany
- Universität Potsdam
- Institut für Chemie
| | - Markus Holzweber
- BAM Bundesanstalt für Materialforschung und –prüfung
- D-12203 Berlin
- Germany
| | - Andreas Lippitz
- BAM Bundesanstalt für Materialforschung und –prüfung
- D-12203 Berlin
- Germany
| | | | - Peter Saalfrank
- Universität Potsdam
- Institut für Chemie
- 14476 Potsdam-Golm
- Germany
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37
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Inkinen J, Niskanen J, Talka T, Sahle CJ, Müller H, Khriachtchev L, Hashemi J, Akbari A, Hakala M, Huotari S. X-ray induced dimerization of cinnamic acid: Time-resolved inelastic X-ray scattering study. Sci Rep 2015; 5:15851. [PMID: 26568420 PMCID: PMC4644965 DOI: 10.1038/srep15851] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 10/05/2015] [Indexed: 11/09/2022] Open
Abstract
A classic example of solid-state topochemical reactions is the ultraviolet-light induced photodimerization of α-trans-cinnamic acid (CA). Here, we report the first observation of an X-ray-induced dimerization of CA and monitor it in situ using nonresonant inelastic X-ray scattering spectroscopy (NRIXS). The time-evolution of the carbon core-electron excitation spectra shows the effects of two X-ray induced reactions: dimerization on a short time-scale and disintegration on a long time-scale. We used spectrum simulations of CA and its dimerization product, α-truxillic acid (TA), to gain insight into the dimerization effects. From the time-resolved spectra, we extracted component spectra and time-dependent weights corresponding to CA and TA. The results suggest that the X-ray induced dimerization proceeds homogeneously in contrast to the dimerization induced by ultraviolet light. We also utilized the ability of NRIXS for direct tomography with chemical-bond contrast to image the spatial progress of the reactions in the sample crystal. Our work paves the way for other time-resolved studies on chemical reactions using inelastic X-ray scattering.
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Affiliation(s)
- Juho Inkinen
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Johannes Niskanen
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Tuomas Talka
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Christoph J Sahle
- ESRF - The European Synchrotron, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Harald Müller
- ESRF - The European Synchrotron, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Leonid Khriachtchev
- Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, Helsinki, Finland
| | - Javad Hashemi
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Ali Akbari
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Mikko Hakala
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
| | - Simo Huotari
- Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Helsinki, Finland
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38
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Niskanen J, Sahle CJ, Juurinen I, Koskelo J, Lehtola S, Verbeni R, Müller H, Hakala M, Huotari S. Protonation Dynamics and Hydrogen Bonding in Aqueous Sulfuric Acid. J Phys Chem B 2015; 119:11732-9. [DOI: 10.1021/acs.jpcb.5b04371] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Johannes Niskanen
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Christoph J. Sahle
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
- ESRF—The European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Iina Juurinen
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Jaakko Koskelo
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Susi Lehtola
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Roberto Verbeni
- ESRF—The European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Harald Müller
- ESRF—The European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Mikko Hakala
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Simo Huotari
- Department
of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
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39
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Prémont-Schwarz M, Schreck S, Iannuzzi M, Nibbering ETJ, Odelius M, Wernet P. Correlating Infrared and X-ray Absorption Energies for Molecular-Level Insight into Hydrogen Bond Making and Breaking in Solution. J Phys Chem B 2015; 119:8115-24. [PMID: 26029818 DOI: 10.1021/acs.jpcb.5b02954] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
While ubiquitous, the making and breaking of hydrogen bonds in solution is notoriously difficult to study due to the associated complex changes of nuclear and electronic structures. With the aim to reduce the according uncertainty in correlating experimental observables and hydrogen-bond configurations, we combine the information from proximate methods to study the N-H···O hydrogen bond in solution. We investigate hydrogen-bonding of the N-H group of N-methylaniline with oxygen from liquid DMSO and acetone with infrared spectra in the N-H stretching region and X-ray absorption spectra at the N K-edge. We experimentally observe blue shifts of the infrared stretching band and an X-ray absorption pre-edge peak when going from DMSO to acetone. With ab initio molecular dynamics simulations and calculated spectra, we qualitatively reproduce the experimental observables but we do not reach quantitative agreement with experiment. The infrared spectra support the notion of weakening the N-H···O hydrogen bond from DMSO to acetone. However, we fail to theoretically reproduce the measured shift of the X-ray absorption pre-edge peak. We discuss possible shortcomings of the simulation models and spectrum calculations. Common features and distinct differences with the O-H···O hydrogen bond are highlighted, and the implications for monitoring hydrogen-bond breaking in solution are discussed.
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Affiliation(s)
- Mirabelle Prémont-Schwarz
- †Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2 A, 12489 Berlin, Germany
| | - Simon Schreck
- ‡Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.,∥Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Marcella Iannuzzi
- §Institute of Physical Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Erik T J Nibbering
- †Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2 A, 12489 Berlin, Germany
| | - Michael Odelius
- ∥Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany.,#Department of Physics, Stockholm University, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Philippe Wernet
- ‡Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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40
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Weinhardt L, Ertan E, Iannuzzi M, Weigand M, Fuchs O, Bär M, Blum M, Denlinger JD, Yang W, Umbach E, Odelius M, Heske C. Probing hydrogen bonding orbitals: resonant inelastic soft X-ray scattering of aqueous NH3. Phys Chem Chem Phys 2015; 17:27145-53. [DOI: 10.1039/c5cp04898b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Resonant inelastic soft X-ray scattering was used to probe the hydrogen bonding orbitals in aqueous ammonia.
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41
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Akbari A, Hashemi J, Niskanen J, Huotari S, Hakala M. Identification of the dye adsorption modes in dye-sensitised solar cells with X-ray spectroscopy techniques: a computational study. Phys Chem Chem Phys 2015; 17:10849-55. [DOI: 10.1039/c4cp05980h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
X-ray photoelectron spectroscopy of O 1s is shown to be the most reliable technique in assessing adsorption geometry of dye molecules in a dye-sensitised solar cell.
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Affiliation(s)
- Ali Akbari
- Department of Physics
- University of Helsinki
- Helsinki
- Finland
| | - Javad Hashemi
- Department of Physics
- University of Helsinki
- Helsinki
- Finland
| | | | - Simo Huotari
- Department of Physics
- University of Helsinki
- Helsinki
- Finland
| | - Mikko Hakala
- Department of Physics
- University of Helsinki
- Helsinki
- Finland
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42
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43
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Govind N, de Jong WA. Simulating Cl K-edge X-ray absorption spectroscopy in MCl6 2− (M = U, Np, Pu) complexes and UOCl5 − using time-dependent density functional theory. Theor Chem Acc 2014. [DOI: 10.1007/s00214-014-1463-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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Abstract
The dynamics of water exhibits anomalous behavior in the presence of different electrolytes. Recent experiments [Kim JS, Wu Z, Morrow AR, Yethiraj A, Yethiraj A (2012) J Phys Chem B 116(39):12007-12013] have found that the self-diffusion of water (Dw) can either be enhanced or suppressed around CsI and NaCl, respectively, relative to that of neat water. Here we show that unlike classical empirical potentials, ab initio molecular dynamics simulations successfully reproduce the qualitative trends observed experimentally. These types of phenomena have often been rationalized in terms of the "structure-making" or "structure-breaking" effects of different ions on the solvent, although the microscopic origins of these features have remained elusive. Rather than disrupting the network in a significant manner, the electrolytes studied here cause rather subtle changes in both structural and dynamical properties of water. In particular, we show that water in the ab initio molecular dynamics simulations is characterized by dynamic heterogeneity, which turns out to be critical in reproducing the experimental trends.
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45
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Hutter J, Iannuzzi M, Schiffmann F, VandeVondele J. cp2k:
atomistic simulations of condensed matter systems. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2013. [DOI: 10.1002/wcms.1159] [Citation(s) in RCA: 1455] [Impact Index Per Article: 132.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jürg Hutter
- Physical Chemistry Institute; University of Zurich; Winterthurerstrasse Zurich Switzerland
| | - Marcella Iannuzzi
- Physical Chemistry Institute; University of Zurich; Winterthurerstrasse Zurich Switzerland
| | - Florian Schiffmann
- Nanoscale Simulations; ETH Zurich, Wolfgang-Pauli-Strasse; Zurich Switzerland
| | - Joost VandeVondele
- Nanoscale Simulations; ETH Zurich, Wolfgang-Pauli-Strasse; Zurich Switzerland
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46
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47
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Kühne TD, Khaliullin RZ. Electronic signature of the instantaneous asymmetry in the first coordination shell of liquid water. Nat Commun 2013; 4:1450. [DOI: 10.1038/ncomms2459] [Citation(s) in RCA: 161] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 01/04/2013] [Indexed: 12/30/2022] Open
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48
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Wang X, Hou Z, Ikeda T, Oshima M, Kakimoto MA, Terakura K. Theoretical Characterization of X-ray Absorption, Emission, and Photoelectron Spectra of Nitrogen Doped along Graphene Edges. J Phys Chem A 2013; 117:579-89. [DOI: 10.1021/jp307405r] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xianlong Wang
- Department of Organic
and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1 S5-20 Ookayama, Tokyo 152-8552, Japan
| | - Zhufeng Hou
- Department of Organic
and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1 S5-20 Ookayama, Tokyo 152-8552, Japan
| | - Takashi Ikeda
- Condensed Matter Science Division,
Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA), 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Masaharu Oshima
- Department of Applied
Chemistry, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-8656, Japan
| | - Masa-aki Kakimoto
- Department of Organic
and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1 S5-20 Ookayama, Tokyo 152-8552, Japan
| | - Kiyoyuki Terakura
- Department of Organic
and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1 S5-20 Ookayama, Tokyo 152-8552, Japan
- Research Center for Integrated
Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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49
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Khaliullin RZ, Kühne TD. Microscopic properties of liquid water from combined ab initio molecular dynamics and energy decomposition studies. Phys Chem Chem Phys 2013; 15:15746-66. [DOI: 10.1039/c3cp51039e] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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50
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Brabec J, Bhaskaran-Nair K, Govind N, Pittner J, Kowalski K. Communication: Application of state-specific multireference coupled cluster methods to core-level excitations. J Chem Phys 2012; 137:171101. [DOI: 10.1063/1.4764355] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Jiří Brabec
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Kiran Bhaskaran-Nair
- William R. Wiley Environmental Molecular Sciences Laboratory, Battelle, Pacific Northwest National Laboratory, K8-91, P.O.Box 999, Richland, Washington 99352, USA
| | - Niranjan Govind
- William R. Wiley Environmental Molecular Sciences Laboratory, Battelle, Pacific Northwest National Laboratory, K8-91, P.O.Box 999, Richland, Washington 99352, USA
| | - Jiří Pittner
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Karol Kowalski
- William R. Wiley Environmental Molecular Sciences Laboratory, Battelle, Pacific Northwest National Laboratory, K8-91, P.O.Box 999, Richland, Washington 99352, USA
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