1
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Spielmann J, Braig D, Streck A, Gustmann T, Kuhn C, Reinauer F, Kurnosov A, Leubner O, Potapkin V, Hasse C, Deutschmann O, Etzold BJM, Scholtissek A, Kramm UI. Exploring the oxidation behavior of undiluted and diluted iron particles for energy storage: Mössbauer spectroscopic analysis and kinetic modeling. Phys Chem Chem Phys 2024; 26:13049-13060. [PMID: 38598198 DOI: 10.1039/d3cp03484d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Iron is an abundant and non-toxic element that holds great potential as energy carrier for large-scale and long-term energy storage. While from a general viewpoint iron oxidation is well-known, the detailed kinetics of oxidation for micrometer sized particles are missing, but required to enable large-scale utilization for energy production. In this work, iron particles are subjected to temperature-programmed oxidation. By dilution with boron nitride a sintering of the particles is prevented enabling to follow single particle effects. The mass fractions of iron and its oxides are determined for different oxidation times using Mössbauer spectroscopy. On the basis of the extracted phase compositions obtained at different times and temperatures (600-700 °C), it can be concluded that also for particles the oxidation follows a parabolic rate law. The parabolic rate constants are determined in this transition region. Knowledge of the particle size distribution and its consideration in modeling the oxidation kinetics of iron powder has proven to be crucial.
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Affiliation(s)
- Jonas Spielmann
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institute, Otto-Berndt-Str. 3, Germany.
| | - Daniel Braig
- Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of reactive Thermo-Fluid Systems, Otto-Berndt-Straße 2, 64287 Darmstadt, Germany.
| | - Antonia Streck
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institute, Otto-Berndt-Str. 3, Germany.
| | - Tobias Gustmann
- Leibniz Institute for Solid State and Materials Research Dresden, 01069 Dresden, Germany
| | - Carola Kuhn
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, Karlsruhe, 76131, Germany
| | - Felix Reinauer
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institute, Otto-Berndt-Str. 3, Germany.
| | | | - Oliver Leubner
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
| | - Vasily Potapkin
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institute, Otto-Berndt-Str. 3, Germany.
| | - Christian Hasse
- Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of reactive Thermo-Fluid Systems, Otto-Berndt-Straße 2, 64287 Darmstadt, Germany.
| | - Olaf Deutschmann
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, Karlsruhe, 76131, Germany
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
| | - Bastian J M Etzold
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institute, Peter-Grünberg-Straße 8, Germany
| | - Arne Scholtissek
- Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of reactive Thermo-Fluid Systems, Otto-Berndt-Straße 2, 64287 Darmstadt, Germany.
| | - Ulrike I Kramm
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institute, Otto-Berndt-Str. 3, Germany.
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2
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Dong Y, Wang J, Rui Z, Yang F, Tang X, Tao Y, Liu Y, Shi B. Phonon energy dissipation in friction between black phosphorus layers. NANOTECHNOLOGY 2024; 35:295402. [PMID: 38593759 DOI: 10.1088/1361-6528/ad3c47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/09/2024] [Indexed: 04/11/2024]
Abstract
Herein, we employ molecular dynamics simulations to decode the friction properties and phonon energy dissipation between black phosphorus layers. The observations reveal the influence of three factors, temperature, velocity, and normal load, on the friction force of monolayer/bilayer black phosphorus. Specifically, friction is negatively correlated with layer thickness and temperature, and positively correlated with velocity and normal load. The change in friction force is further explained in terms of frictional energy dissipation, and supplemented by the height of potential barriers as well as the number of excited phonons. From the phonon spectrum analysis, the phonon number at the contact interface is found to be higher than that at the non-contact interface. This is due to the larger distance of the contact interface atoms deviate from their equilibrium positions, resulting in higher total energy generated by more intense oscillations, and therefore contributes greater to friction.
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Affiliation(s)
- Yun Dong
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
- Institute of Nanomaterials Application Technology, Gansu Academy of Sciences, Lanzhou, 730000, People's Republic of China
| | - Jinguang Wang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Zhiyuan Rui
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Futian Yang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Xinyi Tang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Yi Tao
- School of Mechanical Engineering, Southeast University, Nanjing, 211189, People's Republic of China
| | - Yifan Liu
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Bo Shi
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
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3
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Dong Y, Yang F, Wang J, Tang X, Tao Y, Shi B, Liu Y. Coupling Effect of Structural Lubrication and Thermal Excitation on Phononic Friction. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38593204 DOI: 10.1021/acsami.4c01488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
This work investigates the coupling effect of structural lubrication and thermal excitation on phononic friction between black phosphorus (BP) layers. As the rotation angle increases from commensurate to incommensurate states, the friction gradually decreases at any temperature. However, the role of temperature in friction depends on commensurability. For a rotation angle less than 10°, increasing temperature leads to a decrease in friction due to thermal excitation. Conversely, when the rotation angle exceeds 10°, elevated temperature results in an increase in friction due to the effect of thermal collision. At a critical rotation angle of 10°, higher temperatures lead to reduced friction through thermal lubrication at low speeds, and at large speeds, the thermal excitation duration becomes so short that the role of thermal lubrication is weakened, and instead thermal collision dominates. Further research reveals that BP's ability to withstand different maximum speeds is also determined by commensurability. Finally, a method to measure the sliding period length of a rotated tip through an unrotated substrate potential energy topography is proposed and simply verified by using the phonon spectrum.
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Affiliation(s)
- Yun Dong
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
- Institute of Nanomaterials Application Technology, Gansu Academy of Sciences, Lanzhou 730000, China
| | - Futian Yang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Jinguang Wang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Xinyi Tang
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yi Tao
- School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Bo Shi
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yifan Liu
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
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4
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Hou K, Börgel J, Jiang HZH, SantaLucia DJ, Kwon H, Zhuang H, Chakarawet K, Rohde RC, Taylor JW, Dun C, Paley MV, Turkiewicz AB, Park JG, Mao H, Zhu Z, Alp EE, Zhao J, Hu MY, Lavina B, Peredkov S, Lv X, Oktawiec J, Meihaus KR, Pantazis DA, Vandone M, Colombo V, Bill E, Urban JJ, Britt RD, Grandjean F, Long GJ, DeBeer S, Neese F, Reimer JA, Long JR. Reactive high-spin iron(IV)-oxo sites through dioxygen activation in a metal-organic framework. Science 2023; 382:547-553. [PMID: 37917685 DOI: 10.1126/science.add7417] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/24/2023] [Indexed: 11/04/2023]
Abstract
In nature, nonheme iron enzymes use dioxygen to generate high-spin iron(IV)=O species for a variety of oxygenation reactions. Although synthetic chemists have long sought to mimic this reactivity, the enzyme-like activation of O2 to form high-spin iron(IV) = O species remains an unrealized goal. Here, we report a metal-organic framework featuring iron(II) sites with a local structure similar to that in α-ketoglutarate-dependent dioxygenases. The framework reacts with O2 at low temperatures to form high-spin iron(IV) = O species that are characterized using in situ diffuse reflectance infrared Fourier transform, in situ and variable-field Mössbauer, Fe Kβ x-ray emission, and nuclear resonance vibrational spectroscopies. In the presence of O2, the framework is competent for catalytic oxygenation of cyclohexane and the stoichiometric conversion of ethane to ethanol.
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Affiliation(s)
- Kaipeng Hou
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jonas Börgel
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Henry Z H Jiang
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Daniel J SantaLucia
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Hyunchul Kwon
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Hao Zhuang
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | | | - Rachel C Rohde
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Jordan W Taylor
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Chaochao Dun
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Maria V Paley
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ari B Turkiewicz
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Jesse G Park
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Haiyan Mao
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Ziting Zhu
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - E Ercan Alp
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Michael Y Hu
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Barbara Lavina
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637, USA
| | - Sergey Peredkov
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Xudong Lv
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Julia Oktawiec
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Katie R Meihaus
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | | | - Marco Vandone
- Department of Chemistry, University of Milan, 20133 Milan, Italy
| | - Valentina Colombo
- Department of Chemistry, University of Milan, 20133 Milan, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), UdR Milano, Via Golgi 19, 20133 Milano, Italy
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Jeffrey J Urban
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - R David Britt
- Department of Chemistry, University of California, Davis, CA 95616, USA
- Miller Institute for Basic Research in Science, University of California, Berkeley CA 94720, USA
| | - Fernande Grandjean
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, MO 65409, USA
| | - Gary J Long
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, MO 65409, USA
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Jeffrey A Reimer
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Jeffrey R Long
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
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5
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Zhang Y, Wang Y, Huang Y, Wang J, Liang Z, Hao L, Gao Z, Li J, Wu Q, Zhang H, Liu Y, Sun J, Lin JF. Collective motion in hcp-Fe at Earth's inner core conditions. Proc Natl Acad Sci U S A 2023; 120:e2309952120. [PMID: 37782810 PMCID: PMC10576103 DOI: 10.1073/pnas.2309952120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/15/2023] [Indexed: 10/04/2023] Open
Abstract
Earth's inner core is predominantly composed of solid iron (Fe) and displays intriguing properties such as strong shear softening and an ultrahigh Poisson's ratio. Insofar, physical mechanisms to explain these features coherently remain highly debated. Here, we have studied longitudinal and shear wave velocities of hcp-Fe (hexagonal close-packed iron) at relevant pressure-temperature conditions of the inner core using in situ shock experiments and machine learning molecular dynamics (MLMD) simulations. Our results demonstrate that the shear wave velocity of hcp-Fe along the Hugoniot in the premelting condition, defined as T/Tm (Tm: melting temperature of iron) above 0.96, is significantly reduced by ~30%, while Poisson's ratio jumps to approximately 0.44. MLMD simulations at 230 to 330 GPa indicate that collective motion with fast diffusive atomic migration occurs in premelting hcp-Fe primarily along [100] or [010] crystallographic direction, contributing to its elastic softening and enhanced Poisson's ratio. Our study reveals that hcp-Fe atoms can diffusively migrate to neighboring positions, forming open-loop and close-loop clusters in the inner core conditions. Hcp-Fe with collective motion at the inner core conditions is thus not an ideal solid previously believed. The premelting hcp-Fe with collective motion behaves like an extremely soft solid with an ultralow shear modulus and an ultrahigh Poisson's ratio that are consistent with seismic observations of the region. Our findings indicate that premelting hcp-Fe with fast diffusive motion represents the underlying physical mechanism to help explain the unique seismic and geodynamic features of the inner core.
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Affiliation(s)
- Youjun Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu610065, China
- International Center for Planetary Science, College of Earth Sciences, Chengdu University of Technology, Chengdu610059, China
| | - Yong Wang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing210093, China
| | - Yuqian Huang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu610065, China
| | - Junjie Wang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing210093, China
| | - Zhixin Liang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing210093, China
| | - Long Hao
- National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang621900, China
| | - Zhipeng Gao
- National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang621900, China
| | - Jun Li
- National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang621900, China
| | - Qiang Wu
- National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang621900, China
| | - Hong Zhang
- College of Physics, Sichuan University, Chengdu610065, China
| | - Yun Liu
- International Center for Planetary Science, College of Earth Sciences, Chengdu University of Technology, Chengdu610059, China
| | - Jian Sun
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing210093, China
| | - Jung-Fu Lin
- Department of Earth and Planetary Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX78712
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Babicz JT, Rogers MS, DeWeese DE, Sutherlin KD, Banerjee R, Böttger LH, Yoda Y, Nagasawa N, Saito M, Kitao S, Kurokuzu M, Kobayashi Y, Tamasaku K, Seto M, Lipscomb JD, Solomon EI. Nuclear Resonance Vibrational Spectroscopy Definition of Peroxy Intermediates in Catechol Dioxygenases: Factors that Determine Extra- versus Intradiol Cleavage. J Am Chem Soc 2023; 145:15230-15250. [PMID: 37414058 PMCID: PMC10804917 DOI: 10.1021/jacs.3c02242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
The extradiol dioxygenases (EDOs) and intradiol dioxygenases (IDOs) are nonheme iron enzymes that catalyze the oxidative aromatic ring cleavage of catechol substrates, playing an essential role in the carbon cycle. The EDOs and IDOs utilize very different FeII and FeIII active sites to catalyze the regiospecificity in their catechol ring cleavage products. The factors governing this difference in cleavage have remained undefined. The EDO homoprotocatechuate 2,3-dioxygenase (HPCD) and IDO protocatechuate 3,4-dioxygenase (PCD) provide an opportunity to understand this selectivity, as key O2 intermediates have been trapped for both enzymes. Nuclear resonance vibrational spectroscopy (in conjunction with density functional theory calculations) is used to define the geometric and electronic structures of these intermediates as FeII-alkylhydroperoxo (HPCD) and FeIII-alkylperoxo (PCD) species. Critically, in both intermediates, the initial peroxo bond orientation is directed toward extradiol product formation. Reaction coordinate calculations were thus performed to evaluate both the extra- and intradiol O-O cleavage for the simple organic alkylhydroperoxo and for the FeII and FeIII metal catalyzed reactions. These results show the FeII-alkylhydroperoxo (EDO) intermediate undergoes facile extradiol O-O bond homolysis due to its extra e-, while for the FeIII-alkylperoxo (IDO) intermediate the extradiol cleavage involves a large barrier and would yield the incorrect extradiol product. This prompted our evaluation of a viable mechanism to rearrange the FeIII-alkylperoxo IDO intermediate for intradiol cleavage, revealing a key role in the rebinding of the displaced Tyr447 ligand in this rearrangement, driven by the proton delivery necessary for O-O bond cleavage.
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Affiliation(s)
- Jeffrey T. Babicz
- Department of Chemistry, Stanford University, 380 Roth Way, Stanford, California 94305, United States
| | - Melanie S. Rogers
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota 55391, United States
| | - Dory E. DeWeese
- Department of Chemistry, Stanford University, 380 Roth Way, Stanford, California 94305, United States
| | - Kyle D. Sutherlin
- Department of Chemistry, Stanford University, 380 Roth Way, Stanford, California 94305, United States
| | - Rahul Banerjee
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota 55391, United States
| | - Lars H. Böttger
- Department of Chemistry, Stanford University, 380 Roth Way, Stanford, California 94305, United States
| | - Yoshitaka Yoda
- Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
| | - Nobumoto Nagasawa
- Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
| | - Makina Saito
- Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Shinji Kitao
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan
| | - Masayuki Kurokuzu
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan
| | - Yasuhiro Kobayashi
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan
| | - Kenji Tamasaku
- RIKEN SPring-8 Center, RIKEN, Sayo, Hyogo 679-5148, Japan
| | - Makoto Seto
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan
| | - John D. Lipscomb
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota 55391, United States
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, 380 Roth Way, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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7
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Pointillart F, Bernot K, Le Guennic B, Cador O. Isotopic enrichment in lanthanide coordination complexes: contribution to single-molecule magnets and spin qudit insights. Chem Commun (Camb) 2023. [PMID: 37335142 DOI: 10.1039/d3cc01722b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Lanthanide Single-Molecule Magnets (SMMs) fascinate the scientific community due to their plethora of potential applications ranging from data storage to spintronic devices and quantum computing. This review article proposes a comprehensive description of the influence of the nuclear spin, i.e. hyperfine interaction, on the magnetic properties of lanthanide SMMs and on quantum information processing of qudit. This influence is analysed for non-Kramers and Kramers lanthanide SMMs as well as for the electronic distribution of the electron in 4f orbitals i.e. oblate and prolate ions. Then the role of magnetic interactions in isotopically enriched polynuclear Dy(III) SMMs is discussed. Finally the possible effect of superhyperfine interaction due to the nuclear spin of elements originating from the surrounding of the lanthanide centre is analyzed. The effect of nuclear spin on the dynamics of the lanthanide SMMs is demonstrated using different techniques such as magnetometry, muon spectroscopy (μ-SR), and Mössbauer and Resonance Vibrational Spectroscopies.
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Affiliation(s)
- Fabrice Pointillart
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Boris Le Guennic
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Olivier Cador
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
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8
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Auerbach H, Faus I, Rackwitz S, Wolny JA, Chumakov AI, Knipp M, Walker FA, Schünemann V. Heme protonation affects iron-NO binding in the NO transport protein nitrophorin. J Inorg Biochem 2023; 246:112281. [PMID: 37352657 DOI: 10.1016/j.jinorgbio.2023.112281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/26/2023] [Accepted: 05/30/2023] [Indexed: 06/25/2023]
Abstract
The nitrophorins (NPs) comprise an unusual group of heme proteins with stable ferric heme iron nitric oxide (Fe-NO) complexes. They are found in the salivary glands of the blood-sucking kissing bug Rhodnius prolixus, which uses the NPs to transport the highly reactive signaling molecule NO. Nuclear resonance vibrational spectroscopy (NRVS) of both isoform NP2 and a mutant NP2(Leu132Val) show, after addition of NO, a strong structured vibrational band at around 600 cm-1, which is due to modes with significant Fe-NO bending and stretching contribution. Based on a hybrid calculation method, which uses density functional theory and molecular mechanics, it is demonstrated that protonation of the heme carboxyl groups does influence both the vibrational properties of the Fe-NO entity and its electronic ground state. Moreover, heme protonation causes a significant increase of the gap between the highest occupied and lowest unoccupied molecular orbital by almost one order of magnitude leading to a stabilization of the Fe-NO bond.
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Affiliation(s)
- Hendrik Auerbach
- Department of Physics, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany
| | - Isabelle Faus
- Department of Physics, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany
| | - Sergej Rackwitz
- Department of Physics, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany
| | - Juliusz A Wolny
- Department of Physics, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany
| | | | - Markus Knipp
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany; Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - F Ann Walker
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ 85721-0041, United States
| | - Volker Schünemann
- Department of Physics, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany.
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9
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Wang H, Huang SD, Yan L, Hu MY, Zhao J, Alp EE, Yoda Y, Petersen CM, Thompson MK. Europium-151 and iron-57 nuclear resonant vibrational spectroscopy of naturally abundant KEu(III)Fe(II)(CN) 6 and Eu(III)Fe(III)(CN) 6 complexes. Dalton Trans 2022; 51:17753-17761. [PMID: 36346270 PMCID: PMC9933908 DOI: 10.1039/d2dt02600g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have performed and analyzed the first combined 151Eu and 57Fe nuclear resonant vibrational spectroscopy (NRVS) for naturally abundant KEu(III)[Fe(II)(CN)6] and Eu(III)[Fe(III)(CN)6] complexes. Comparison of the observed 151Eu vs.57Fe NRVS spectroscopic features confirms that Eu(III) in both KEu(III)[Fe(II)(CN)6] and Eu(III)[Fe(III)(CN)6] occupies a position outside the [Fe(CN)6] core and coordinates to the N atoms of the CN- ions, whereas Fe(III) or Fe(II) occupies the site inside the [Fe(CN)6]4- core and coordinates to the C atoms of the CN- ions. In addition to the spectroscopic interest, the results from this study provide invaluable insights for the design and evaluation of the nanoparticles of such complexes as potential cellular contrast agents for their use in magnetic resonance imaging. The combined 151Eu and 57Fe NRVS measurements are also among the first few explorations of bi-isotopic NRVS experiments.
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Affiliation(s)
| | - Songping D Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA.
| | - Lifen Yan
- SETI Institute, Mountain View, CA 94043, USA.
| | - Michael Y Hu
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Ercan E Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Yoshitaka Yoda
- Precision Spectroscopy Division, SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan
| | - Courtney M Petersen
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Matthew K Thompson
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
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10
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Wang J, Yoda Y, Wang H. Tracking energy scale variations from scan to scan in nuclear resonant vibrational spectroscopy: In situ correction using zero-energy position drifts ΔE i rather than making in situ calibration measurements. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:095101. [PMID: 36182504 DOI: 10.1063/5.0086332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 07/24/2022] [Indexed: 06/16/2023]
Abstract
Nuclear resonant vibrational spectroscopy (NRVS) is an excellent modern vibrational spectroscopy, in particular, for revealing site-specific information inside complicated molecules, such as enzymes. There are two different concepts about the energy calibration for a beamline or a monochromator (including a high resolution monochromator): the absolute energy calibration and the practical energy calibration. While the former pursues an as-fine-as-possible and as-repeatable-as-possible result, the latter includes the environment influenced variation from scan to scan, which often needs an in situ calibration measurement to track. However, an in situ measurement often shares a weak beam intensity and therefore has a noisy NRVS spectrum at the calibration sample location, not leading to a better energy calibration/correction in most cases. NRVS users for a long time have noticed that there are energy drifts in the vibrational spectra's zero-energy positions from scan to scan (ΔEi), but their trend has not been explored and utilized in the past. In this publication, after providing a brief introduction to the critical issue(s) in practical NRVS energy calibrations, we have evaluated the trend and the mechanism for these zero-energy drifts (ΔEi) and explored their link to the energy scales (αi) from scan to scan. Via detailed analyses, we have established a new stepwise procedure for carrying out practical energy calibrations, which includes the correction for the scan-dependent energy variations using ΔEi values rather than running additional in situ calibration measurements. We also proved that one additional instrument-fixed scaling constant (α0) exists to convert such "calibrated" energy axis (E') to the real energy axis (Ereal). The "calibrated" real energy axis (Ereal) has a preliminary error bar of ±0.1% (the 2σE divided by the vibrational energy position), which is 4-8 times better than that from the current practical energy calibration procedure.
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Affiliation(s)
- Jessie Wang
- School of Computer Science, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Yoshitaka Yoda
- Research and Utilization Division, SPring-8/JASRI, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
| | - Hongxin Wang
- SETI Institute, Mountain View, California 94043, USA
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11
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Stankov S, Merkel DG, Kalt J, Göttlicher J, Łażewski J, Sternik M, Jochym PT, Piekarz P, Baumbach T, Chumakov AI, Rüffer R. Phonon confinement and interface lattice dynamics of ultrathin high- k rare earth sesquioxide films: the case of Eu 2O 3 on YSZ(001). NANOSCALE ADVANCES 2021; 4:19-25. [PMID: 36132967 PMCID: PMC9419856 DOI: 10.1039/d1na00728a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/23/2021] [Indexed: 06/16/2023]
Abstract
The spatial confinement of atoms at surfaces and interfaces significantly alters the lattice dynamics of thin films, heterostructures and multilayers. Ultrathin films with high dielectric constants (high-k) are of paramount interest for applications as gate layers in current and future integrated circuits. Here we report a lattice dynamics study of high-k Eu2O3 films with thicknesses of 21.3, 2.2, 1.3, and 0.8 nm deposited on YSZ(001). The Eu-partial phonon density of states (PDOS), obtained from nuclear inelastic scattering, exhibits broadening of the phonon peaks accompanied by up to a four-fold enhancement of the number of low-energy states compared to the ab initio calculated PDOS of a perfect Eu2O3 crystal. Our analysis demonstrates that while the former effect reflects the reduced phonon lifetimes observed in thin films due to scattering from lattice defects, the latter phenomenon arises from an ultrathin EuO layer formed between the thin Eu2O3 film and the YSZ(001) substrate. Thus, our work uncovers another potential source of vibrational anomalies in thin films and multilayers, which has to be cautiously considered.
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Affiliation(s)
- Svetoslav Stankov
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology D-76344 Eggenstein-Leopoldshafen Germany +49 (0)721 608-26 172 +49 (0)721 608-28 680
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology D-76131 Karlsruhe Germany
| | - Dániel G Merkel
- Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1525 Budapest Hungary
- Centre for Energy Research POB 49 H-1525 Budapest Hungary
| | - Jochen Kalt
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology D-76344 Eggenstein-Leopoldshafen Germany +49 (0)721 608-26 172 +49 (0)721 608-28 680
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology D-76131 Karlsruhe Germany
| | - Jörg Göttlicher
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology D-76344 Eggenstein-Leopoldshafen Germany +49 (0)721 608-26 172 +49 (0)721 608-28 680
| | - Jan Łażewski
- Institute of Nuclear Physics, Polish Academy of Sciences PL-31342 Kraków Poland
| | - Małgorzata Sternik
- Institute of Nuclear Physics, Polish Academy of Sciences PL-31342 Kraków Poland
| | - Paweł T Jochym
- Institute of Nuclear Physics, Polish Academy of Sciences PL-31342 Kraków Poland
| | - Przemysław Piekarz
- Institute of Nuclear Physics, Polish Academy of Sciences PL-31342 Kraków Poland
| | - Tilo Baumbach
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology D-76344 Eggenstein-Leopoldshafen Germany +49 (0)721 608-26 172 +49 (0)721 608-28 680
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology D-76131 Karlsruhe Germany
| | | | - Rudolf Rüffer
- ESRF-The European Synchrotron F-38043 Grenoble France
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12
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Solomon EI, DeWeese DE, Babicz JT. Mechanisms of O 2 Activation by Mononuclear Non-Heme Iron Enzymes. Biochemistry 2021; 60:3497-3506. [PMID: 34266238 PMCID: PMC8768060 DOI: 10.1021/acs.biochem.1c00370] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Two major subclasses of mononuclear non-heme ferrous enzymes use two electron-donating organic cofactors (α-ketoglutarate or pterin) to activate O2 to form FeIV═O intermediates that further react with their substrates through hydrogen atom abstraction or electrophilic aromatic substitution. New spectroscopic methodologies have been developed, enabling the study of the active sites in these enzymes and their oxygen intermediates. Coupled to electronic structure calculations, the results of these spectroscopies provide fundamental insight into mechanism. This Perspective summarizes the results of these studies in elucidating the mechanism of dioxygen activation to form the FeIV═O intermediate and the geometric and electronic structure of this intermediate that enables its high reactivity and selectivity in product formation.
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Affiliation(s)
- Edward I. Solomon
- Department of Chemistry, Stanford University, 333 Campus Dr. Stanford, CA, 94305, United States,SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, 94025, United States
| | - Dory E. DeWeese
- Department of Chemistry, Stanford University, 333 Campus Dr. Stanford, CA, 94305, United States
| | - Jeffrey T. Babicz
- Department of Chemistry, Stanford University, 333 Campus Dr. Stanford, CA, 94305, United States
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13
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Wang H, Braun A, Cramer SP, Gee LB, Yoda Y. Nuclear Resonance Vibrational Spectroscopy: A Modern Tool to Pinpoint Site-Specific Cooperative Processes. Catalysts 2021; 11:909. [PMID: 35582460 PMCID: PMC9109880 DOI: 10.3390/cryst11080909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
Nuclear resonant vibrational spectroscopy (NRVS) is a synchrotron radiation (SR)-based nuclear inelastic scattering spectroscopy that measures the phonons (i.e., vibrational modes) associated with the nuclear transition. It has distinct advantages over traditional vibration spectroscopy and has wide applications in physics, chemistry, bioinorganic chemistry, materials sciences, and geology, as well as many other research areas. In this article, we present a scientific and figurative description of this yet modern tool for the potential users in various research fields in the future. In addition to short discussions on its development history, principles, and other theoretical issues, the focus of this article is on the experimental aspects, such as the instruments, the practical measurement issues, the data process, and a few examples of its applications. The article concludes with introduction to non-57Fe NRVS and an outlook on the impact from the future upgrade of SR rings.
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Affiliation(s)
| | - Artur Braun
- Laboratory for High Performance Ceramics, Empa. Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | | | - Leland B. Gee
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Yoshitaka Yoda
- Precision Spectroscopy Division, SPring-8/JASRI, Sayo 679-5198, Japan
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14
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Łażewski J, Sternik M, Jochym PT, Kalt J, Stankov S, Chumakov AI, Göttlicher J, Rüffer R, Baumbach T, Piekarz P. Lattice Dynamics and Structural Phase Transitions in Eu 2O 3. Inorg Chem 2021; 60:9571-9579. [PMID: 34143607 PMCID: PMC8277167 DOI: 10.1021/acs.inorgchem.1c00708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Using the density
functional theory, we study the structural and
lattice dynamical properties of europium sesquioxide (Eu2O3) in the cubic, trigonal, and monoclinic phases. The
obtained lattice parameters and energies of the Raman modes show a
good agreement with the available experimental data. The Eu-partial
phonon density of states calculated for the cubic structure is compared
with the nuclear inelastic scattering data obtained from a 20 nm thick
Eu2O3 film deposited on a YSZ substrate. A small
shift of the experimental spectrum to higher energies results from
a compressive strain induced by the substrate. On the basis of lattice
and phonon properties, we analyze the mechanisms of structural transitions
between different phases of Eu2O3. The phase transitions of rare-earth sesquioxide
Eu2O3 are very complicated. Analyzing dynamical
properties
of this compound for experimentally observed C-, A-, and B-type phases
and extracting key symmetry elements common for these phases, we describe
transition mechanisms and their sequence. Our DFT first-principles
predictions are supported by the nuclear inelastic scattering measurements.
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Affiliation(s)
- Jan Łażewski
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
| | - Małgorzata Sternik
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
| | - Paweł T Jochym
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
| | - Jochen Kalt
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany.,Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen 76344, Germany
| | - Svetoslav Stankov
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany.,Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen 76344, Germany
| | | | - Jorg Göttlicher
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen 76344, Germany
| | - Rudolf Rüffer
- ESRF-The European Synchrotron, Grenoble 38043, France
| | - Tilo Baumbach
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany.,Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen 76344, Germany
| | - Przemysław Piekarz
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
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15
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Kunze S, Grosse P, Bernal Lopez M, Sinev I, Zegkinoglou I, Mistry H, Timoshenko J, Hu MY, Zhao J, Alp EE, Chee SW, Roldan Cuenya B. Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe‐Cu and Fe‐Ag Nanoparticle Catalysts during CO
2
Electroreduction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sebastian Kunze
- Department of Physics Ruhr-University Bochum 44780 Bochum Germany
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Philipp Grosse
- Department of Physics Ruhr-University Bochum 44780 Bochum Germany
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society 14195 Berlin Germany
| | | | - Ilya Sinev
- Department of Physics Ruhr-University Bochum 44780 Bochum Germany
| | | | - Hemma Mistry
- Department of Physics Ruhr-University Bochum 44780 Bochum Germany
| | - Janis Timoshenko
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory Chicago USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory Chicago USA
| | - Ercan E. Alp
- Advanced Photon Source Argonne National Laboratory Chicago USA
| | - See Wee Chee
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society 14195 Berlin Germany
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16
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Kunze S, Grosse P, Bernal Lopez M, Sinev I, Zegkinoglou I, Mistry H, Timoshenko J, Hu MY, Zhao J, Alp EE, Chee SW, Roldan Cuenya B. Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO 2 Electroreduction. Angew Chem Int Ed Engl 2020; 59:22667-22674. [PMID: 32833290 PMCID: PMC7756314 DOI: 10.1002/anie.202010535] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Indexed: 11/12/2022]
Abstract
Operando nuclear resonant inelastic X‐ray scattering (NRIXS) and X‐ray absorption fine‐structure spectroscopy (XAFS) measurements were used to gain insight into the structure and surface composition of FeCu and FeAg nanoparticles (NPs) during the electrochemical CO2 reduction (CO2RR) and to extract correlations with their catalytic activity and selectivity. The formation of a core–shell structure during CO2RR for FeAg NPs was inferred from the analysis of the operando NRIXS data (phonon density of states, PDOS) and XAFS measurements. Electrochemical analysis of the FeAg NPs revealed a faradaic selectivity of 36 % for CO in 0.1 M KHCO3 at −1.1 V vs. RHE, similar to that of pure Ag NPs. In contrast, a predominant selectivity towards H2 evolution is obtained in the case of the FeCu NPs, analogous to the results obtained for pure Fe NPs, although small Cu NPs have also been shown to favor H2 production.
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Affiliation(s)
- Sebastian Kunze
- Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany.,Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Philipp Grosse
- Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany.,Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | | | - Ilya Sinev
- Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany
| | | | - Hemma Mistry
- Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Michael Y Hu
- Advanced Photon Source, Argonne National Laboratory, Chicago, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Chicago, USA
| | - Ercan E Alp
- Advanced Photon Source, Argonne National Laboratory, Chicago, USA
| | - See Wee Chee
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195, Berlin, Germany
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17
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Van Stappen C, Decamps L, Cutsail GE, Bjornsson R, Henthorn JT, Birrell JA, DeBeer S. The Spectroscopy of Nitrogenases. Chem Rev 2020; 120:5005-5081. [PMID: 32237739 PMCID: PMC7318057 DOI: 10.1021/acs.chemrev.9b00650] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Indexed: 01/08/2023]
Abstract
Nitrogenases are responsible for biological nitrogen fixation, a crucial step in the biogeochemical nitrogen cycle. These enzymes utilize a two-component protein system and a series of iron-sulfur clusters to perform this reaction, culminating at the FeMco active site (M = Mo, V, Fe), which is capable of binding and reducing N2 to 2NH3. In this review, we summarize how different spectroscopic approaches have shed light on various aspects of these enzymes, including their structure, mechanism, alternative reactivity, and maturation. Synthetic model chemistry and theory have also played significant roles in developing our present understanding of these systems and are discussed in the context of their contributions to interpreting the nature of nitrogenases. Despite years of significant progress, there is still much to be learned from these enzymes through spectroscopic means, and we highlight where further spectroscopic investigations are needed.
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Affiliation(s)
- Casey Van Stappen
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Laure Decamps
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - George E. Cutsail
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Ragnar Bjornsson
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Justin T. Henthorn
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - James A. Birrell
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Serena DeBeer
- Max Planck Institute for
Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
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18
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Exploring the Vibrational Side of Spin-Phonon Coupling in Single-Molecule Magnets via 161 Dy Nuclear Resonance Vibrational Spectroscopy. Angew Chem Int Ed Engl 2020; 59:8818-8822. [PMID: 32181552 PMCID: PMC7317570 DOI: 10.1002/anie.201914728] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/14/2020] [Indexed: 11/06/2022]
Abstract
Synchrotron-based nuclear resonance vibrational spectroscopy (NRVS) using the Mössbauer isotope 161 Dy has been employed for the first time to study the vibrational properties of a single-molecule magnet (SMM) incorporating DyIII , namely [Dy(Cy3 PO)2 (H2 O)5 ]Br3 ⋅2 (Cy3 PO)⋅2 H2 O ⋅2 EtOH. The experimental partial phonon density of states (pDOS), which includes all vibrational modes involving a displacement of the DyIII ion, was reproduced by means of simulations using density functional theory (DFT), enabling the assignment of all intramolecular vibrational modes. This study proves that 161 Dy NRVS is a powerful experimental tool with significant potential to help to clarify the role of phonons in SMMs.
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Affiliation(s)
- Lena Scherthan
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Rouven F. Pfleger
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Hendrik Auerbach
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Tim Hochdörffer
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Juliusz A. Wolny
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Wenli Bi
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
- Department of PhysicsUniversity of Alabama at BirminghamBirminghamAL35294USA
| | - Jiyong Zhao
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - Michael Y. Hu
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - E. Ercan Alp
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Rolf Diller
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute of NanotechnologyKarlsruhe Institute of Technology76021KarlsruheGermany
| | - Volker Schünemann
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
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19
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Untersuchung von Schwingungen in Bezug auf Spin‐Phonon‐Kopplung in Einzelmolekülmagneten mittels nuklearer inelastischer Streuung am
161
Dy‐Kern. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Rouven F. Pfleger
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Hendrik Auerbach
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Tim Hochdörffer
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Juliusz A. Wolny
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Wenli Bi
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Physics University of Alabama at Birmingham Birmingham AL 35294 USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Rolf Diller
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
- Institute of Nanotechnology Karlsruhe Institute of Technology 76021 Karlsruhe Deutschland
| | - Volker Schünemann
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
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20
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The influence of phonon softening on the superconducting critical temperature of Sn nanostructures. Sci Rep 2020; 10:5729. [PMID: 32235906 PMCID: PMC7109077 DOI: 10.1038/s41598-020-62617-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 03/12/2020] [Indexed: 11/09/2022] Open
Abstract
The increase in superconducting transition temperature (TC) of Sn nanostructures in comparison to bulk, was studied. Changes in the phonon density of states (PDOS) of the weakly coupled superconductor Sn were analyzed and correlated with the increase in TC measured by magnetometry. The PDOS of all nanostructured samples shows a slightly increased number of low-energy phonon modes and a strong decrease in the number of high-energy phonon modes in comparison to the bulk Sn PDOS. The phonon densities of states, which were determined previously using nuclear resonant inelastic X-ray scattering, were used to calculate the superconducting transition temperature using the Allen-Dynes-McMillan (ADMM) formalism. Both the calculated as well as the experimentally determined values of TC show an increase compared to the bulk superconducting transition temperature. The good agreement between these values indicates that phonon softening has a major influence on the superconducting transition temperature of Sn nanostructures. The influence of electron confinement effects appears to be minor in these systems.
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21
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Sergueev I, Glazyrin K, Herrmann MG, Alexeev P, Wille HC, Leupold O, May AF, Pandey T, Lindsay LR, Friese K, Hermann RP. High-pressure nuclear inelastic scattering with backscattering monochromatization. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:1592-1599. [PMID: 31490149 DOI: 10.1107/s1600577519008853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 06/21/2019] [Indexed: 06/10/2023]
Abstract
The capability to perform high-pressure low-temperature nuclear inelastic scattering on 125Te and 121Sb with a sapphire backscattering monochromator is presented. This technique was applied to measure nuclear inelastic scattering in TeO2 at pressures up to 10 GPa and temperatures down to 25 K. The evaluated partial Te densities of phonon states were compared with theoretical calculations and with Raman scattering measured under the same conditions. The high-pressure cell developed in this work can also be used for other techniques at pressures up to at least 100 GPa.
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Affiliation(s)
- Ilya Sergueev
- Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany
| | | | - Markus G Herrmann
- Jülich Centre for Neutron Science-2/Peter Grünberg Institut-4, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
| | - Pavel Alexeev
- Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany
| | | | - Olaf Leupold
- Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany
| | - Andrew F May
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Tribhuwan Pandey
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Lucas R Lindsay
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Karen Friese
- Jülich Centre for Neutron Science-2/Peter Grünberg Institut-4, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
| | - Raphael P Hermann
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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22
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Pradip R, Piekarz P, Merkel DG, Kalt J, Waller O, Chumakov AI, Rüffer R, Oleś AM, Parlinski K, Baumbach T, Stankov S. Phonon confinement and spin-phonon coupling in tensile-strained ultrathin EuO films. NANOSCALE 2019; 11:10968-10976. [PMID: 31139805 DOI: 10.1039/c9nr01931f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reducing the material sizes to the nanometer length scale leads to drastic modifications of the propagating lattice excitations (phonons) and their interactions with electrons and magnons. In EuO, a promising material for spintronic applications in which a giant spin-phonon interaction is present, this might imply a reduction of the degree of spin polarization in thin films. Therefore, a comprehensive investigation of the lattice dynamics and spin-phonon interaction in EuO films is necessary for practical applications. We report a systematic lattice dynamics study of ultrathin EuO(001) films using nuclear inelastic scattering on the Mössbauer-active isotope 151Eu and first-principles theory. The films were epitaxially grown on YAlO3(110), which induces a tensile strain of ca. 2%. By reducing the EuO layer thickness from 8 nm to a sub-monolayer coverage, the Eu-partial phonon density of states (PDOS) reveals a gradual enhancement of the number of low-energy phonon states and simultaneous broadening and suppression of the peaks. These deviations from bulk features lead to significant anomalies in the vibrational thermodynamic and elastic properties calculated from the PDOS. The experimental results, supported by first-principles theory, unveil a reduction of the strength of the spin-phonon interaction in the tensile-strained EuO by a factor of four compared to a strain-free lattice.
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Affiliation(s)
- Ramu Pradip
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
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23
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Solomon EI, Iyer SR. Geometric and Electronic Structural Contributions to Fe/O 2 Reactivity. ACTA ACUST UNITED AC 2019; 73:3-14. [PMID: 32391114 DOI: 10.4019/bjscc.73.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
While two classes of non-heme iron enzymes use ferric centers to activate singlet organic substrates for the spin forbidden reaction with 3O2, most classes use high spin ferrous sites to activate dioxygen. These FeII active sites do not exhibit intense absorption bands and have an integer spin ground state thus are mostly EPR inactive. We have developed new spectroscopic methodologies that provide geometric and electronic structural insight into the ferrous centers and their interactions with cosubstrates for dioxygen activation and into the nature of the intermediates generated in these reactions. First, we present our variable-temperature variable-field magnetic circular dichroism (VTVH MCD) methodology to experimentally define the geometric and electronic structure of the high spin ferrous active site. Then, we focus on using Nuclear Resonance Vibrational Spectroscopy (NRVS, performed at SPring-8) to define geometric structure and VTVH MCD to define the electronic structure of the FeIII-OOH and FeIV=O intermediates generated in O2 activation and the spin state dependence of their frontier molecular orbitals (FMOs) in controlling reactivity. Experimentally validated reaction coordinates are derived for the anticancer drug bleomycin in its cleavage of DNA and for an alpha- ketoglutarate dependent dioxygenase in its selective halogenation over the thermodynamically favored hydroxylation of substrate.
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24
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Sutherlin KD, Wasada-Tsutsui Y, Mbughuni MM, Rogers MS, Park K, Liu LV, Kwak Y, Srnec M, Böttger LH, Frenette M, Yoda Y, Kobayashi Y, Kurokuzu M, Saito M, Seto M, Hu M, Zhao J, Alp EE, Lipscomb JD, Solomon EI. Nuclear Resonance Vibrational Spectroscopy Definition of O 2 Intermediates in an Extradiol Dioxygenase: Correlation to Crystallography and Reactivity. J Am Chem Soc 2018; 140:16495-16513. [PMID: 30418018 DOI: 10.1021/jacs.8b06517] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The extradiol dioxygenases are a large subclass of mononuclear nonheme Fe enzymes that catalyze the oxidative cleavage of catechols distal to their OH groups. These enzymes are important in bioremediation, and there has been significant interest in understanding how they activate O2. The extradiol dioxygenase homoprotocatechuate 2,3-dioxygenase (HPCD) provides an opportunity to study this process, as two O2 intermediates have been trapped and crystallographically defined using the slow substrate 4-nitrocatechol (4NC): a side-on Fe-O2-4NC species and a Fe-O2-4NC peroxy bridged species. Also with 4NC, two solution intermediates have been trapped in the H200N variant, where H200 provides a second-sphere hydrogen bond in the wild-type enzyme. While the electronic structure of these solution intermediates has been defined previously as FeIII-superoxo-catecholate and FeIII-peroxy-semiquinone, their geometric structures are unknown. Nuclear resonance vibrational spectroscopy (NRVS) is an important tool for structural definition of nonheme Fe-O2 intermediates, as all normal modes with Fe displacement have intensity in the NRVS spectrum. In this study, NRVS is used to define the geometric structure of the H200N-4NC solution intermediates in HPCD as an end-on FeIII-superoxo-catecholate and an end-on FeIII-hydroperoxo-semiquinone. Parallel calculations are performed to define the electronic structures and protonation states of the crystallographically defined wild-type HPCD-4NC intermediates, where the side-on intermediate is found to be a FeIII-hydroperoxo-semiquinone. The assignment of this crystallographic intermediate is validated by correlation to the NRVS data through computational removal of H200. While the side-on hydroperoxo semiquinone intermediate is computationally found to be nonreactive in peroxide bridge formation, it is isoenergetic with a superoxo catecholate species that is competent in performing this reaction. This study provides insight into the relative reactivities of FeIII-superoxo and FeIII-hydroperoxo intermediates in nonheme Fe enzymes and into the role H200 plays in facilitating extradiol catalysis.
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Affiliation(s)
- Kyle D Sutherlin
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Yuko Wasada-Tsutsui
- Department of Life Science and Applied Chemistry, Graduate School of Engineering , Nagoya Institute of Technology , Gokiso-cho, Showa-ku, Nagoya 466-8555 , Japan
| | - Michael M Mbughuni
- Department of Biochemistry, Molecular Biology, & Biophysics , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Melanie S Rogers
- Department of Biochemistry, Molecular Biology, & Biophysics , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Kiyoung Park
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Lei V Liu
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Yeonju Kwak
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Martin Srnec
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Lars H Böttger
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Mathieu Frenette
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Yoshitaka Yoda
- Japan Synchrotron Radiation Research Institute , Hyogo 679-5198 , Japan
| | | | - Masayuki Kurokuzu
- Research Reactor Institute, Kyoto University , Osaka 590-0494 , Japan
| | - Makina Saito
- Research Reactor Institute, Kyoto University , Osaka 590-0494 , Japan
| | - Makoto Seto
- Research Reactor Institute, Kyoto University , Osaka 590-0494 , Japan
| | - Michael Hu
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - Jiyong Zhao
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - E Ercan Alp
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - John D Lipscomb
- Department of Biochemistry, Molecular Biology, & Biophysics , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Edward I Solomon
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States.,SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
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25
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Ohta T, Shibata T, Kobayashi Y, Yoda Y, Ogura T, Neya S, Suzuki A, Seto M, Yamamoto Y. A Nuclear Resonance Vibrational Spectroscopic Study of Oxy Myoglobins Reconstituted with Chemically Modified Heme Cofactors: Insights into the Fe-O 2 Bonding and Internal Dynamics of the Protein. Biochemistry 2018; 57:6649-6652. [PMID: 30422640 DOI: 10.1021/acs.biochem.8b00829] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molecular mechanism of O2 binding to hemoglobin (Hb) and myoglobin (Mb) is a long-standing issue in the field of bioinorganic and biophysical chemistry. The nature of Fe-O2 bond in oxy Hb and Mb had been extensively investigated by resonance Raman spectroscopy, which assigned the Fe-O2 stretching bands at ∼570 cm-1. However, resonance Raman assignment of the vibrational mode had been elusive due to the spectroscopic selection rule and to the limited information available about the ground-state molecular structure. Thus, nuclear resonance vibrational spectroscopy was applied to oxy Mbs reconstituted with 57Fe-labeled native heme cofactor and two chemically modified ones. This advanced spectroscopy in conjunction with DFT analyses gave new insights into the nature of the Fe-O2 bond of oxy heme by revealing the effect of heme peripheral substitutions on the vibrational dynamics of heme Fe atom, where the main Fe-O2 stretching band of the native protein was characterized at ∼420 cm-1.
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Affiliation(s)
- Takehiro Ohta
- Picobiology Institute, Graduate School of Life Science , University of Hyogo, RSC-UH LP Center , Hyogo 679-5148 , Japan
| | - Tomokazu Shibata
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Yasuhiro Kobayashi
- Institute for Integrated Radiation and Nuclear Science , Kyoto University , Osaka 590-0494 , Japan
| | - Yoshitaka Yoda
- Japan Synchrotron Radiation Research Institute , Hyogo 679-5198 , Japan
| | - Takashi Ogura
- Picobiology Institute, Graduate School of Life Science , University of Hyogo, RSC-UH LP Center , Hyogo 679-5148 , Japan
| | - Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences , Chiba University , Chiba 260-8657 , Japan
| | - Akihiro Suzuki
- Department of Materials Engineering, National Institute of Technology , Nagaoka College , Nagaoka 940-8532 , Japan
| | - Makoto Seto
- Institute for Integrated Radiation and Nuclear Science , Kyoto University , Osaka 590-0494 , Japan.,Japan Atomic Energy Agency , Hyogo 679-5148 , Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
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26
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Dauphas N, Hu MY, Baker EM, Hu J, Tissot FLH, Alp EE, Roskosz M, Zhao J, Bi W, Liu J, Lin JF, Nie NX, Heard A. SciPhon: a data analysis software for nuclear resonant inelastic X-ray scattering with applications to Fe, Kr, Sn, Eu and Dy. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1581-1599. [PMID: 30179200 PMCID: PMC6140397 DOI: 10.1107/s1600577518009487] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/02/2018] [Indexed: 06/01/2023]
Abstract
The synchrotron radiation technique of nuclear resonant inelastic X-ray scattering (NRIXS), also known as nuclear resonance vibrational spectroscopy or nuclear inelastic scattering, provides a wealth of information on the vibrational properties of solids. It has found applications in studies of lattice dynamics and elasticity, superconductivity, heme biochemistry, seismology, isotope geochemistry and many other fields. It involves probing the vibrational modes of solids by using the nuclear resonance of Mössbauer isotopes such as 57Fe, 83Kr, 119Sn, 151Eu and 161Dy. After data reduction, it provides the partial phonon density of states of the Mössbauer isotope that is investigated, as well as many other derived quantities such as the mean force constant of the chemical bonds and the Debye velocity. The data reduction is, however, not straightforward and involves removal of the elastic peak, normalization and Fourier-Log transformation. Furthermore, some of the quantities derived are highly sensitive to details in the baseline correction. A software package and several novel procedures to streamline and hopefully improve the reduction of the NRIXS data generated at sector 3ID of the Advanced Photon Source have been developed. The graphical user interface software is named SciPhon and runs as a Mathematica package. It is easily portable to other platforms and can be easily adapted for reducing data generated at other beamlines. Several tests and comparisons are presented that demonstrate the usefulness of this software, whose results have already been used in several publications. Here, the SciPhon software is used to reduce Kr, Sn, Eu and Dy NRIXS data, and potential implications for interpreting natural isotopic variations in those systems are discussed.
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Affiliation(s)
- Nicolas Dauphas
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
| | - Michael Y. Hu
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Erik M. Baker
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
- Department of Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Justin Hu
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
| | - Francois L. H. Tissot
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
| | - E. Ercan Alp
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Mathieu Roskosz
- IMPMC-UMR CNRS 7590, Sorbonne Universités, UPMC, IRD, MNHN, Muséum National d’Histoire Naturelle, 61 Rue Buffon, 75005 Paris, France
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Wenli Bi
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Jin Liu
- Department of Geological Sciences, Stanford University, Stanford, CA, USA
| | - Jung-Fu Lin
- Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78712, USA
| | - Nicole X. Nie
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
| | - Andrew Heard
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA
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27
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Peng Q, Sage JT, Liu Y, Wang Z, Hu MY, Zhao J, Alp EE, Scheidt WR, Li J. How Does a Heme Carbene Differ from Diatomic Ligated (NO, CO, and CN -) Analogues in the Axial Bond? Inorg Chem 2018; 57:8788-8795. [PMID: 30010336 DOI: 10.1021/acs.inorgchem.8b00574] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Compared to well studied diatomic ligands (NO, CN-, CO), the axial bonds of carbene hemes is much less known although its significance in biological chemistry. The unusually large quadrupole splitting (Δ EQ = +2.2 mm·s-1) and asymmetric parameter (η = 0.9) of the five-coordinate heme carbene [Fe(TTP)(CCl2)], which is the largest among all known low spin ferrohemes, has driven investigations by means of Mössbauer effect Nuclear Resonance Vibrational Spectroscopy (NRVS). Three distinct measurements on one single crystal (two in-plane and one out-of-plane) have demonstrated comprehensive vibrational structures including stretch (429) and bending modes (472 cm-1) of the axial Fe-CCl2, and revealed iron vibrational anisotropy in three orthogonal directions for the first time. Frontier orbital analysis especially comparisons with diatomic analogues (NO, CN-, CO) suggest that CCl2, similar to NO, has led to strong but anisotropic π bonding in a ligand-based "4C"-coordinate which induced the vibrational anisotropies and very large Mössbauer parameters. This is contrasted to CN- and CO complexes which possess a porphyrin-based "4N"-coordinate electronic and vibrational structures due to inherent on-axis linear ligation.
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Affiliation(s)
- Qian Peng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - J Timothy Sage
- Department of Physics and Center for Interdisciplinary Research on Complex Systems , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Yulong Liu
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Yanqi Lake, Huairou, Beijing 101408 , China
| | - Zijian Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Michael Y Hu
- Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Jiyong Zhao
- Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - E Ercan Alp
- Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - W Robert Scheidt
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Jianfeng Li
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Yanqi Lake, Huairou, Beijing 101408 , China
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28
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Pham CC, Mulder DW, Pelmenschikov V, King PW, Ratzloff MW, Wang H, Mishra N, Alp EE, Zhao J, Hu MY, Tamasaku K, Yoda Y, Cramer SP. Terminal Hydride Species in [FeFe]‐Hydrogenases Are Vibrationally Coupled to the Active Site Environment. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Cindy C. Pham
- Department of Chemistry UC Davis One Shields Ave Davis CA 95616 USA
| | - David W. Mulder
- National Renewable Energy Laboratory 15013 Denver W. Pkwy. Golden CO 80401 USA
| | - Vladimir Pelmenschikov
- Institut für Chemie Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Paul W. King
- National Renewable Energy Laboratory 15013 Denver W. Pkwy. Golden CO 80401 USA
| | - Michael W. Ratzloff
- National Renewable Energy Laboratory 15013 Denver W. Pkwy. Golden CO 80401 USA
| | - Hongxin Wang
- Department of Chemistry UC Davis One Shields Ave Davis CA 95616 USA
| | - Nakul Mishra
- Department of Chemistry UC Davis One Shields Ave Davis CA 95616 USA
| | - Esen E. Alp
- Building 401 Argonne National Laboratory 9700 Cass Ave Lemont IL 60439 USA
| | - Jiyong Zhao
- Building 401 Argonne National Laboratory 9700 Cass Ave Lemont IL 60439 USA
| | - Michael Y. Hu
- Building 401 Argonne National Laboratory 9700 Cass Ave Lemont IL 60439 USA
| | - Kenji Tamasaku
- JASRI SPring-8 1-1-1 Kouto, Mizauki-cho Sayo-gun Hyogo 679-5198 Japan
| | - Yoshitaka Yoda
- JASRI SPring-8 1-1-1 Kouto, Mizauki-cho Sayo-gun Hyogo 679-5198 Japan
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29
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Pham CC, Mulder DW, Pelmenschikov V, King PW, Ratzloff MW, Wang H, Mishra N, Alp EE, Zhao J, Hu MY, Tamasaku K, Yoda Y, Cramer SP. Terminal Hydride Species in [FeFe]-Hydrogenases Are Vibrationally Coupled to the Active Site Environment. Angew Chem Int Ed Engl 2018; 57:10605-10609. [PMID: 29923293 DOI: 10.1002/anie.201805144] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Indexed: 01/01/2023]
Abstract
A combination of nuclear resonance vibrational spectroscopy (NRVS), FTIR spectroscopy, and DFT calculations was used to observe and characterize Fe-H/D bending modes in CrHydA1 [FeFe]-hydrogenase Cys-to-Ser variant C169S. Mutagenesis of cysteine to serine at position 169 changes the functional group adjacent to the H-cluster from a -SH to -OH, thus altering the proton transfer pathway. The catalytic activity of C169S is significantly reduced compared to that of native CrHydA1, presumably owing to less efficient proton transfer to the H-cluster. This mutation enabled effective capture of a hydride/deuteride intermediate and facilitated direct detection of the Fe-H/D normal modes. We observed a significant shift to higher frequency in an Fe-H bending mode of the C169S variant, as compared to previous findings with reconstituted native and oxadithiolate (ODT)-substituted CrHydA1. On the basis of DFT calculations, we propose that this shift is caused by the stronger interaction of the -OH group of C169S with the bridgehead -NH- moiety of the active site, as compared to that of the -SH group of C169 in the native enzyme.
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Affiliation(s)
- Cindy C Pham
- Department of Chemistry, UC Davis, One Shields Ave, Davis, CA, 95616, USA
| | - David W Mulder
- National Renewable Energy Laboratory, 15013 Denver W. Pkwy., Golden, CO, 80401, USA
| | - Vladimir Pelmenschikov
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Paul W King
- National Renewable Energy Laboratory, 15013 Denver W. Pkwy., Golden, CO, 80401, USA
| | - Michael W Ratzloff
- National Renewable Energy Laboratory, 15013 Denver W. Pkwy., Golden, CO, 80401, USA
| | - Hongxin Wang
- Department of Chemistry, UC Davis, One Shields Ave, Davis, CA, 95616, USA
| | - Nakul Mishra
- Department of Chemistry, UC Davis, One Shields Ave, Davis, CA, 95616, USA
| | - Esen E Alp
- Building 401, Argonne National Laboratory, 9700 Cass Ave, Lemont, IL, 60439, USA
| | - Jiyong Zhao
- Building 401, Argonne National Laboratory, 9700 Cass Ave, Lemont, IL, 60439, USA
| | - Michael Y Hu
- Building 401, Argonne National Laboratory, 9700 Cass Ave, Lemont, IL, 60439, USA
| | - Kenji Tamasaku
- JASRI, SPring-8, 1-1-1 Kouto, Mizauki-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Yoshitaka Yoda
- JASRI, SPring-8, 1-1-1 Kouto, Mizauki-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Stephen P Cramer
- Department of Chemistry, UC Davis, One Shields Ave, Davis, CA, 95616, USA
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30
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Sutherlin KD, Rivard BS, Böttger LH, Liu LV, Rogers MS, Srnec M, Park K, Yoda Y, Kitao S, Kobayashi Y, Saito M, Seto M, Hu M, Zhao J, Lipscomb JD, Solomon EI. NRVS Studies of the Peroxide Shunt Intermediate in a Rieske Dioxygenase and Its Relation to the Native Fe II O 2 Reaction. J Am Chem Soc 2018; 140:5544-5559. [PMID: 29618204 PMCID: PMC5973823 DOI: 10.1021/jacs.8b01822] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The Rieske dioxygenases are a major subclass of mononuclear nonheme iron enzymes that play an important role in bioremediation. Recently, a high-spin FeIII-(hydro)peroxy intermediate (BZDOp) has been trapped in the peroxide shunt reaction of benzoate 1,2-dioxygenase. Defining the structure of this intermediate is essential to understanding the reactivity of these enzymes. Nuclear resonance vibrational spectroscopy (NRVS) is a recently developed synchrotron technique that is ideal for obtaining vibrational, and thus structural, information on Fe sites, as it gives complete information on all vibrational normal modes containing Fe displacement. In this study, we present NRVS data on BZDOp and assign its structure using these data coupled to experimentally calibrated density functional theory calculations. From this NRVS structure, we define the mechanism for the peroxide shunt reaction. The relevance of the peroxide shunt to the native FeII/O2 reaction is evaluated. For the native FeII/O2 reaction, an FeIII-superoxo intermediate is found to react directly with substrate. This process, while uphill thermodynamically, is found to be driven by the highly favorable thermodynamics of proton-coupled electron transfer with an electron provided by the Rieske [2Fe-2S] center at a later step in the reaction. These results offer important insight into the relative reactivities of FeIII-superoxo and FeIII-hydroperoxo species in nonheme Fe biochemistry.
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Affiliation(s)
- Kyle D. Sutherlin
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Brent S. Rivard
- Department of Biochemistry, Molecular Biology, & Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Lars H. Böttger
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Lei V. Liu
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Melanie S. Rogers
- Department of Biochemistry, Molecular Biology, & Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Martin Srnec
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- J. HeyrovskýInstitute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Kiyoung Park
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Yoshitaka Yoda
- Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
| | - Shinji Kitao
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | | | - Makina Saito
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - Makoto Seto
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - Michael Hu
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - John D. Lipscomb
- Department of Biochemistry, Molecular Biology, & Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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31
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Carlson MR, Gray DL, Richers CP, Wang W, Zhao PH, Rauchfuss TB, Pelmenschikov V, Pham CC, Gee LB, Wang H, Cramer SP. Sterically Stabilized Terminal Hydride of a Diiron Dithiolate. Inorg Chem 2018; 57:1988-2001. [PMID: 29384371 DOI: 10.1021/acs.inorgchem.7b02903] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The kinetically robust hydride [t-HFe2(Me2pdt)(CO)2(dppv)2]+ ([t-H1]+) (Me2pdt2- = Me2C(CH2S-)2; dppv = cis-1,2-C2H2(PPh2)2) and related derivatives were prepared with 57Fe enrichment for characterization by NMR, FT-IR, and NRVS. The experimental results were rationalized using DFT molecular modeling and spectral simulations. The spectroscopic analysis was aimed at supporting assignments of Fe-H vibrational spectra as they relate to recent measurements on [FeFe]-hydrogenase enzymes. The combination of bulky Me2pdt2- and dppv ligands stabilizes the terminal hydride with respect to its isomerization to the 5-16 kcal/mol more stable bridging hydride ([μ-H1]+) with t1/2(313.3 K) = 19.3 min. In agreement with the nOe experiments, the calculations predict that one methyl group in [t-H1]+ interacts with the hydride with a computed CH···HFe distance of 1.7 Å. Although [t-H571]+ exhibits multiple NRVS features in the 720-800 cm-1 region containing the bending Fe-H modes, the deuterated [t-D571]+ sample exhibits a unique Fe-D/CO band at ∼600 cm-1. In contrast, the NRVS spectra for [μ-H571]+ exhibit weaker bands near 670-700 cm-1 produced by the Fe-H-Fe wagging modes coupled to Me2pdt2- and dppv motions.
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Affiliation(s)
- Michaela R Carlson
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Danielle L Gray
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Casseday P Richers
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Wenguang Wang
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Pei-Hua Zhao
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | | | - Cindy C Pham
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Leland B Gee
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Hongxin Wang
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Stephen P Cramer
- Department of Chemistry, University of California , Davis, California 95616, United States
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32
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Snyder BER, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Iron and Copper Active Sites in Zeolites and Their Correlation to Metalloenzymes. Chem Rev 2017; 118:2718-2768. [DOI: 10.1021/acs.chemrev.7b00344] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin E. R. Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Max L. Bols
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A. Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F. Sels
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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33
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Abstract
For over 20 years, nuclear resonance vibrational spectroscopy (NRVS) has been used to study vibrational dynamics of iron-containing materials. With the only selection rule being iron motion, 57Fe NRVS has become an excellent tool to study iron-containing enzymes. Over the past decade, considerable progress has been made in the study of complex metalloenzymes using NRVS. Iron cofactors in heme-containing globins; [2Fe2S], [3Fe4S], [4Fe4S] proteins; the [NiFe] and [FeFe] hydrogenases; and nitrogenases have been explored in a fashion not possible through traditional vibrational spectroscopy. In this chapter, we discuss the basics of NRVS, a strategy to perform NRVS, and a discussion of the application of NRVS on rubredoxin and [FeFe] hydrogenase.
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Affiliation(s)
- Leland B Gee
- University of California, Davis, Davis, CA, United States.
| | - Hongxin Wang
- University of California, Davis, Davis, CA, United States
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34
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Zhao JY, Bi W, Sinogeikin S, Hu MY, Alp EE, Wang XC, Jin CQ, Lin JF. A compact membrane-driven diamond anvil cell and cryostat system for nuclear resonant scattering at high pressure and low temperature. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:125109. [PMID: 29289218 DOI: 10.1063/1.4999787] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new miniature panoramic diamond anvil cell (mini-pDAC) as well as a unique gas membrane-driven mechanism is developed and implemented to measure electronic, magnetic, vibrational, and thermodynamic properties of materials using the nuclear resonant inelastic X-ray scattering (NRIXS) and the synchrotron Mössbauer spectroscopy (SMS) simultaneously at high pressure (over Mbar) and low temperature (T < 10 K). The gas membrane system allows in situ pressure tuning of the mini-pDAC at low temperature. The mini-pDAC fits into a specially designed compact liquid helium flow cryostat system to achieve low temperatures, where liquid helium flows through the holder of the mini-pDAC to cool the sample more efficiently. The system has achieved sample temperatures as low as 9 K. Using the membrane, sample pressures of up to 1.4 Mbar have been generated from this mini-pDAC. The instrument has been routinely used at 3-ID, Advanced Photon Source, for NRIXS and SMS studies. The same instrument can easily be used for other X-ray techniques, such as X-ray radial diffraction, X-ray Raman scattering, X-ray emission spectroscopy, and X-ray inelastic scattering under high pressure and low temperature. In this paper, technical details of the mini-pDAC, membrane engaging mechanism, and the cryostat system are described, and some experimental results are discussed.
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Affiliation(s)
- J Y Zhao
- Advanced Photon Source, Argonne National Laboratory, 9700 S Cass Ave., Argonne, Illinois 60439, USA
| | - W Bi
- Advanced Photon Source, Argonne National Laboratory, 9700 S Cass Ave., Argonne, Illinois 60439, USA
| | - S Sinogeikin
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - M Y Hu
- Advanced Photon Source, Argonne National Laboratory, 9700 S Cass Ave., Argonne, Illinois 60439, USA
| | - E E Alp
- Advanced Photon Source, Argonne National Laboratory, 9700 S Cass Ave., Argonne, Illinois 60439, USA
| | - X C Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 10090, People's Republic of China
| | - C Q Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing 10090, People's Republic of China
| | - J F Lin
- Department of Geology Sciences, The University of Texas at Austin, Austin, Texas 78712, USA
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35
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Pelmenschikov V, Birrell JA, Pham CC, Mishra N, Wang H, Sommer C, Reijerse E, Richers CP, Tamasaku K, Yoda Y, Rauchfuss TB, Lubitz W, Cramer SP. Reaction Coordinate Leading to H 2 Production in [FeFe]-Hydrogenase Identified by Nuclear Resonance Vibrational Spectroscopy and Density Functional Theory. J Am Chem Soc 2017; 139:16894-16902. [PMID: 29054130 PMCID: PMC5699932 DOI: 10.1021/jacs.7b09751] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
[FeFe]-hydrogenases are metalloenzymes that reversibly reduce protons to molecular hydrogen at exceptionally high rates. We have characterized the catalytically competent hydride state (Hhyd) in the [FeFe]-hydrogenases from both Chlamydomonas reinhardtii and Desulfovibrio desulfuricans using 57Fe nuclear resonance vibrational spectroscopy (NRVS) and density functional theory (DFT). H/D exchange identified two Fe-H bending modes originating from the binuclear iron cofactor. DFT calculations show that these spectral features result from an iron-bound terminal hydride, and the Fe-H vibrational frequencies being highly dependent on interactions between the amine base of the catalytic cofactor with both hydride and the conserved cysteine terminating the proton transfer chain to the active site. The results indicate that Hhyd is the catalytic state one step prior to H2 formation. The observed vibrational spectrum, therefore, provides mechanistic insight into the reaction coordinate for H2 bond formation by [FeFe]-hydrogenases.
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Affiliation(s)
- Vladimir Pelmenschikov
- Institut für Chemie, Technische Universität Berlin , Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - James A Birrell
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Cindy C Pham
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
| | - Nakul Mishra
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
| | - Hongxin Wang
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
| | - Constanze Sommer
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Edward Reijerse
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Casseday P Richers
- School of Chemical Sciences, University of Illinois , 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Kenji Tamasaku
- JASRI , Spring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yoshitaka Yoda
- JASRI , Spring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois , 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Stephen P Cramer
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
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36
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Zegkinoglou I, Zendegani A, Sinev I, Kunze S, Mistry H, Jeon HS, Zhao J, Hu MY, Alp EE, Piontek S, Smialkowski M, Apfel UP, Körmann F, Neugebauer J, Hickel T, Roldan Cuenya B. Operando Phonon Studies of the Protonation Mechanism in Highly Active Hydrogen Evolution Reaction Pentlandite Catalysts. J Am Chem Soc 2017; 139:14360-14363. [DOI: 10.1021/jacs.7b07902] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ali Zendegani
- Max-Planck-Institut für Eisenforschung, 40237 Düsseldorf, Germany
| | - Ilya Sinev
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Sebastian Kunze
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Hemma Mistry
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Hyo Sang Jeon
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Jiyong Zhao
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Michael Y. Hu
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - E. Ercan Alp
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Stefan Piontek
- Inorganic
Chemistry I, Ruhr-University Bochum, 44780 Bochum, Germany
| | | | - Ulf-Peter Apfel
- Inorganic
Chemistry I, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Fritz Körmann
- Max-Planck-Institut für Eisenforschung, 40237 Düsseldorf, Germany
| | - Jörg Neugebauer
- Max-Planck-Institut für Eisenforschung, 40237 Düsseldorf, Germany
| | - Tilmann Hickel
- Max-Planck-Institut für Eisenforschung, 40237 Düsseldorf, Germany
| | - Beatriz Roldan Cuenya
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
- Department
of Interface Science, Fritz-Haber Institute of the Max Planck Society, 14195 Berlin, Germany
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37
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Scheidt WR, Li J, Sage JT. What Can Be Learned from Nuclear Resonance Vibrational Spectroscopy: Vibrational Dynamics and Hemes. Chem Rev 2017; 117:12532-12563. [PMID: 28921972 PMCID: PMC5639469 DOI: 10.1021/acs.chemrev.7b00295] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
Nuclear resonance
vibrational spectroscopy (NRVS; also known as
nuclear inelastic scattering, NIS) is a synchrotron-based method that
reveals the full spectrum of vibrational dynamics for Mössbauer
nuclei. Another major advantage, in addition to its completeness (no
arbitrary optical selection rules), is the unique selectivity of NRVS.
The basics of this recently developed technique are first introduced
with descriptions of the experimental requirements and data analysis
including the details of mode assignments. We discuss the use of NRVS
to probe 57Fe at the center of heme and heme protein derivatives
yielding the vibrational density of states for the iron. The application
to derivatives with diatomic ligands (O2, NO, CO, CN–) shows the strong capabilities of identifying mode
character. The availability of the complete vibrational spectrum of
iron allows the identification of modes not available by other techniques.
This permits the correlation of frequency with other physical properties.
A significant example is the correlation we find between the Fe–Im
stretch in six-coordinate Fe(XO) hemes and the trans Fe–N(Im)
bond distance, not possible previously. NRVS also provides uniquely
quantitative insight into the dynamics of the iron. For example, it
provides a model-independent means of characterizing the strength
of iron coordination. Prediction of the temperature-dependent mean-squared
displacement from NRVS measurements yields a vibrational “baseline”
for Fe dynamics that can be compared with results from techniques
that probe longer time scales to yield quantitative insights into
additional dynamical processes.
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Affiliation(s)
- W Robert Scheidt
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556 United States
| | - Jianfeng Li
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences , YanQi Lake, HuaiRou District, Beijing 101408, China
| | - J Timothy Sage
- Department of Physics and Center for Interdisciplinary Research on Complex Systems, Northeastern University , 120 Forsyth Street, Boston, Massachusetts 02115, United States
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38
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O'Dowd B, Williams S, Wang H, No JH, Rao G, Wang W, McCammon JA, Cramer SP, Oldfield E. Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non-diphosphate Inhibitors. Chembiochem 2017; 18:914-920. [PMID: 28253432 PMCID: PMC5445010 DOI: 10.1002/cbic.201700052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Indexed: 11/11/2022]
Abstract
Isoprenoid biosynthesis is an important area for anti-infective drug development. One isoprenoid target is (E)-1-hydroxy-2-methyl-but-2-enyl 4-diphosphate (HMBPP) reductase (IspH), which forms isopentenyl diphosphate and dimethylallyl diphosphate from HMBPP in a 2H+ /2e- reduction. IspH contains a 4 Fe-4 S cluster, and in this work, we first investigated how small molecules bound to the cluster by using HYSCORE and NRVS spectroscopies. The results of these, as well as other structural and spectroscopic investigations, led to the conclusion that, in most cases, ligands bound to IspH 4 Fe-4 S clusters by η1 coordination, forming tetrahedral geometries at the unique fourth Fe, ligand side chains preventing further ligand (e.g., H2 O, O2 ) binding. Based on these ideas, we used in silico methods to find drug-like inhibitors that might occupy the HMBPP substrate binding pocket and bind to Fe, leading to the discovery of a barbituric acid analogue with a Ki value of ≈500 nm against Pseudomonas aeruginosa IspH.
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Affiliation(s)
- Bing O'Dowd
- Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, IL, 61801, USA
| | - Sarah Williams
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Hongxin Wang
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA, 95616, USA
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Joo Hwan No
- Center for Biophysics and Computational Biology, 607 South Mathews Avenue, Urbana, IL, 61801, USA
| | - Guodong Rao
- Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, IL, 61801, USA
| | - Weixue Wang
- Center for Biophysics and Computational Biology, 607 South Mathews Avenue, Urbana, IL, 61801, USA
| | - J Andrew McCammon
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA
- Howard Hughes Medical Institute, University of California at San Diego, La Jolla, CA, 92093, USA
- National Biomedical Computation Resource, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Stephen P Cramer
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA, 95616, USA
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Eric Oldfield
- Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, IL, 61801, USA
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39
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Park K, Li N, Kwak Y, Srnec M, Bell CB, Liu LV, Wong SD, Yoda Y, Kitao S, Seto M, Hu M, Zhao J, Krebs C, Bollinger JM, Solomon EI. Peroxide Activation for Electrophilic Reactivity by the Binuclear Non-heme Iron Enzyme AurF. J Am Chem Soc 2017; 139:7062-7070. [PMID: 28457126 DOI: 10.1021/jacs.7b02997] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Binuclear non-heme iron enzymes activate O2 for diverse chemistries that include oxygenation of organic substrates and hydrogen atom abstraction. This process often involves the formation of peroxo-bridged biferric intermediates, only some of which can perform electrophilic reactions. To elucidate the geometric and electronic structural requirements to activate peroxo reactivity, the active peroxo intermediate in 4-aminobenzoate N-oxygenase (AurF) has been characterized spectroscopically and computationally. A magnetic circular dichroism study of reduced AurF shows that its electronic and geometric structures are poised to react rapidly with O2. Nuclear resonance vibrational spectroscopic definition of the peroxo intermediate formed in this reaction shows that the active intermediate has a protonated peroxo bridge. Density functional theory computations on the structure established here show that the protonation activates peroxide for electrophilic/single-electron-transfer reactivity. This activation of peroxide by protonation is likely also relevant to the reactive peroxo intermediates in other binuclear non-heme iron enzymes.
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Affiliation(s)
- Kiyoung Park
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States.,Department of Chemistry, KAIST , Daejeon 34141, Republic of Korea
| | - Ning Li
- Department of Biochemistry and Molecular Biology, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Yeonju Kwak
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | - Martin Srnec
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | - Caleb B Bell
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | - Lei V Liu
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | - Shaun D Wong
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | | | - Shinji Kitao
- Research Reactor Institute, Kyoto University , Kumatori-cho, Osaka 590-0494, Japan
| | - Makoto Seto
- Research Reactor Institute, Kyoto University , Kumatori-cho, Osaka 590-0494, Japan
| | - Michael Hu
- Advanced Photon Source, Argonne National Laboratory , Lemont, Illinois 60439, United States
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory , Lemont, Illinois 60439, United States
| | - Carsten Krebs
- Department of Biochemistry and Molecular Biology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.,Department of Chemistry, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - J Martin Bollinger
- Department of Biochemistry and Molecular Biology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.,Department of Chemistry, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Stanford, California 94309, United States
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40
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Schäfer B, Bauer T, Faus I, Wolny JA, Dahms F, Fuhr O, Lebedkin S, Wille HC, Schlage K, Chevalier K, Rupp F, Diller R, Schünemann V, Kappes MM, Ruben M. A luminescent Pt2Fe spin crossover complex. Dalton Trans 2017; 46:2289-2302. [DOI: 10.1039/c6dt04360g] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterotrinuclear luminescent [Pt2Fe] spin crossover (SCO) complex was developed, synthesized, and investigated.
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41
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Shen G, Mao HK. High-pressure studies with x-rays using diamond anvil cells. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:016101. [PMID: 27873767 DOI: 10.1088/1361-6633/80/1/016101] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Pressure profoundly alters all states of matter. The symbiotic development of ultrahigh-pressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.
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Affiliation(s)
- Guoyin Shen
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC, USA
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42
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Seiler A, Piekarz P, Ibrahimkutty S, Merkel DG, Waller O, Pradip R, Chumakov AI, Rüffer R, Baumbach T, Parlinski K, Fiederle M, Stankov S. Anomalous Lattice Dynamics of EuSi_{2} Nanoislands: Role of Interfaces Unveiled. PHYSICAL REVIEW LETTERS 2016; 117:276101. [PMID: 28084777 DOI: 10.1103/physrevlett.117.276101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Indexed: 06/06/2023]
Abstract
We report a systematic lattice dynamics study of EuSi_{2} films and nanoislands by in situ nuclear inelastic scattering on ^{151}Eu and ab initio theory. The Eu-partial phonon density of states of the nanoislands exhibits anomalous excess of phonon states at low and high energies, not present in the bulk and at the EuSi_{2}(001) surface. We demonstrate that atomic vibrations along the island-substrate interface give rise to phonon states both at low and high energies, while atomic vibrations across the island-island interface result in localized high-energy phonon modes.
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Affiliation(s)
- A Seiler
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
| | - P Piekarz
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland
| | - S Ibrahimkutty
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
| | - D G Merkel
- ESRF-The European Synchrotron, F-38000 Grenoble, France
| | - O Waller
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
| | - R Pradip
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
| | - A I Chumakov
- ESRF-The European Synchrotron, F-38000 Grenoble, France
| | - R Rüffer
- ESRF-The European Synchrotron, F-38000 Grenoble, France
| | - T Baumbach
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
- ANKA Synchrotron Radiation Facility, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
| | - K Parlinski
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland
| | - M Fiederle
- Freiburg Materials Research Center, University of Freiburg, D-79104 Freiburg, Germany
| | - S Stankov
- Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
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43
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Yoda Y, Okada K, Wang H, Cramer SP, Seto M. High-resolution monochromator for iron nuclear resonance vibrational spectroscopy of biological samples. JAPANESE JOURNAL OF APPLIED PHYSICS. PART 1, REGULAR PAPERS & SHORT NOTES 2016; 55:122401. [PMID: 29503983 PMCID: PMC5831540 DOI: 10.7567/jjap.55.122401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A new high-resolution monochromator for 14.4-keV X-rays has been designed and developed for the Fe nuclear resonance vibrational spectroscopy of biological samples. Higher flux and stability are especially important for measuring biological samples, because of the very weak signals produced due to the low concentrations of Fe-57. A 24% increase in flux while maintaining a high resolution below 0.9 meV is achieved in the calculation by adopting an asymmetric reflection of Ge, which is used as the first crystal of the three-bounce high-resolution monochromator. The small cost resulting from a 20% increase of the exit beam size is acceptable to our biological applications. The higher throughput of the new design has been experimentally verified. A fine rotation mechanics that that combines a weak-link hinge with a piezoelectric actuator was used for controlling the photon energy of the monochromatic beam. The resulting stability is sufficient to preserve the intrinsic resolution.
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Affiliation(s)
- Yoshitaka Yoda
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Kyoko Okada
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Hongxin Wang
- Department of Chemistry, University of California, 1 Shields Ave., Davis, CA, 95616, United States
- Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, United States
| | - Stephen P. Cramer
- Department of Chemistry, University of California, 1 Shields Ave., Davis, CA, 95616, United States
- Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, United States
| | - Makoto Seto
- Research Reactor Institute, Kyoto University, 2-1010 Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494, Japan
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44
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Abstract
The non-heme Fe enzymes are ubiquitous in nature and perform a wide range of functions involving O2 activation. These had been difficult to study relative to heme enzymes; however, spectroscopic methods that provide significant insight into the correlation of structure with function have now been developed. This Current Topics article summarizes both the molecular mechanism these enzymes use to control O2 activation in the presence of cosubstrates and the oxygen intermediates these reactions generate. Three types of O2 activation are observed. First, non-heme reactivity is shown to be different from heme chemistry where a low-spin FeIII-OOH non-heme intermediate directly reacts with substrate. Also, two subclasses of non-heme Fe enzymes generate high-spin FeIV═O intermediates that provide both σ and π frontier molecular orbitals that can control selectivity. Finally, for several subclasses of non-heme Fe enzymes, binding of the substrate to the FeII site leads to the one-electron reductive activation of O2 to an FeIII-superoxide capable of H atom abstraction and electrophilic attack.
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Affiliation(s)
- Edward I Solomon
- Department of Chemistry, Stanford University , Stanford, California 94305, United States.,SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
| | - Serra Goudarzi
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Kyle D Sutherlin
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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45
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Sutherlin KD, Liu LV, Lee YM, Kwak Y, Yoda Y, Saito M, Kurokuzu M, Kobayashi Y, Seto M, Que L, Nam W, Solomon EI. Nuclear Resonance Vibrational Spectroscopic Definition of Peroxy Intermediates in Nonheme Iron Sites. J Am Chem Soc 2016; 138:14294-14302. [PMID: 27726349 DOI: 10.1021/jacs.6b07227] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
FeIII-(hydro)peroxy intermediates have been isolated in two classes of mononuclear nonheme Fe enzymes that are important in bioremediation: the Rieske dioxygenases and the extradiol dioxygenases. The binding mode and protonation state of the peroxide moieties in these intermediates are not well-defined, due to a lack of vibrational structural data. Nuclear resonance vibrational spectroscopy (NRVS) is an important technique for obtaining vibrational information on these and other intermediates, as it is sensitive to all normal modes with Fe displacement. Here, we present the NRVS spectra of side-on FeIII-peroxy and end-on FeIII-hydroperoxy model complexes and assign these spectra using calibrated DFT calculations. We then use DFT calculations to define and understand the changes in the NRVS spectra that arise from protonation and from opening the Fe-O-O angle. This study identifies four spectroscopic handles that will enable definition of the binding mode and protonation state of FeIII-peroxy intermediates in mononuclear nonheme Fe enzymes. These structural differences are important in determining the frontier molecular orbitals available for reactivity.
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Affiliation(s)
- Kyle D Sutherlin
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Lei V Liu
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Yong-Min Lee
- Department of Bioinspired Science, Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University , Seoul 120-750, Korea
| | - Yeonju Kwak
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | | | - Makina Saito
- Research Reactor Institute, Kyoto University , Osaka 590-0494, Japan
| | - Masayuki Kurokuzu
- Research Reactor Institute, Kyoto University , Osaka 590-0494, Japan
| | | | - Makoto Seto
- Research Reactor Institute, Kyoto University , Osaka 590-0494, Japan
| | - Lawrence Que
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Wonwoo Nam
- Department of Bioinspired Science, Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University , Seoul 120-750, Korea
| | - Edward I Solomon
- Department of Chemistry, Stanford University , Stanford, California 94305, United States.,SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
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46
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Schilter D, Camara JM, Huynh MT, Hammes-Schiffer S, Rauchfuss TB. Hydrogenase Enzymes and Their Synthetic Models: The Role of Metal Hydrides. Chem Rev 2016; 116:8693-749. [PMID: 27353631 PMCID: PMC5026416 DOI: 10.1021/acs.chemrev.6b00180] [Citation(s) in RCA: 386] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogenase enzymes efficiently process H2 and protons at organometallic FeFe, NiFe, or Fe active sites. Synthetic modeling of the many H2ase states has provided insight into H2ase structure and mechanism, as well as afforded catalysts for the H2 energy vector. Particularly important are hydride-bearing states, with synthetic hydride analogues now known for each hydrogenase class. These hydrides are typically prepared by protonation of low-valent cores. Examples of FeFe and NiFe hydrides derived from H2 have also been prepared. Such chemistry is more developed than mimicry of the redox-inactive monoFe enzyme, although functional models of the latter are now emerging. Advances in physical and theoretical characterization of H2ase enzymes and synthetic models have proven key to the study of hydrides in particular, and will guide modeling efforts toward more robust and active species optimized for practical applications.
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Affiliation(s)
- David Schilter
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - James M. Camara
- Department of Chemistry, Yeshiva University, 500 West 185th Street, New York, New York 10033, United States
| | - Mioy T. Huynh
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Sharon Hammes-Schiffer
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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47
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Peng Q, Pavlik JW, Silvernail NJ, Alp EE, Hu MY, Zhao J, Sage JT, Scheidt WR. 3D Motions of Iron in Six-Coordinate {FeNO}(7) Hemes by Nuclear Resonance Vibration Spectroscopy. Chemistry 2016; 22:6323-6332. [PMID: 26999733 PMCID: PMC4999340 DOI: 10.1002/chem.201505155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Indexed: 11/08/2022]
Abstract
The vibrational spectrum of a six-coordinate nitrosyl iron porphyrinate, monoclinic [Fe(TpFPP)(1-MeIm)(NO)] (TpFPP=tetra-para-fluorophenylporphyrin; 1-MeIm=1-methylimidazole), has been studied by oriented single-crystal nuclear resonance vibrational spectroscopy (NRVS). The crystal was oriented to give spectra perpendicular to the porphyrin plane and two in-plane spectra perpendicular or parallel to the projection of the FeNO plane. These enable assignment of the FeNO bending and stretching modes. The measurements reveal that the two in-plane spectra have substantial differences that result from the strongly bonded axial NO ligand. The direction of the in-plane iron motion is found to be largely parallel and perpendicular to the projection of the bent FeNO on the porphyrin plane. The out-of-plane Fe-N-O stretching and bending modes are strongly mixed with each other, as well as with porphyrin ligand modes. The stretch is mixed with v50 as was also observed for dioxygen complexes. The frequency of the assigned stretching mode of eight Fe-X-O (X=N, C, and O) complexes is correlated with the Fe-XO bond lengths. The nature of highest frequency band at ≈560 cm(-1) has also been examined in two additional new derivatives. Previously assigned as the Fe-NO stretch (by resonance Raman), it is better described as the bend, as the motion of the central nitrogen atom of the FeNO group is very large. There is significant mixing of this mode. The results emphasize the importance of mode mixing; the extent of mixing must be related to the peripheral phenyl substituents.
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Affiliation(s)
- Qian Peng
- Contribution from Department of Chemistry and Biochemistry, University of Notre Dame, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | - Jeffrey W. Pavlik
- Contribution from Department of Chemistry and Biochemistry, University of Notre Dame, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | - Nathan J. Silvernail
- Contribution from Department of Chemistry and Biochemistry, University of Notre Dame, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | - E. Ercan Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Michael Y. Hu
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - J. Timothy Sage
- Department of Physics and Center for Interdisciplinary Research on Complex Systems, Northeastern University, 120 Forsyth Street, Boston, MA 02115, USA
| | - W. Robert Scheidt
- Contribution from Department of Chemistry and Biochemistry, University of Notre Dame, University of Notre Dame, Notre Dame, Indiana 46556 USA
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48
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Wang H, Yoda Y, Ogata H, Tanaka Y, Lubitz W. A strenuous experimental journey searching for spectroscopic evidence of a bridging nickel-iron-hydride in [NiFe] hydrogenase. JOURNAL OF SYNCHROTRON RADIATION 2015; 22:1334-44. [PMID: 26524296 PMCID: PMC4629863 DOI: 10.1107/s1600577515017816] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/23/2015] [Indexed: 05/24/2023]
Abstract
Direct spectroscopic evidence for a hydride bridge in the Ni-R form of [NiFe] hydrogenase has been obtained using iron-specific nuclear resonance vibrational spectroscopy (NRVS). The Ni-H-Fe wag mode at 675 cm(-1) is the first spectroscopic evidence for a bridging hydride in Ni-R as well as the first iron-hydride-related NRVS feature observed for a biological system. Although density function theory (DFT) calculation assisted the determination of the Ni-R structure, it did not predict the Ni-H-Fe wag mode at ∼ 675 cm(-1) before NRVS. Instead, the observed Ni-H-Fe mode provided a critical reference for the DFT calculations. While the overall science about Ni-R is presented and discussed elsewhere, this article focuses on the long and strenuous experimental journey to search for and experimentally identify the Ni-H-Fe wag mode in a Ni-R sample. As a methodology, the results presented here will go beyond Ni-R and hydrogenase research and will also be of interest to other scientists who use synchrotron radiation for measuring dilute samples or weak spectroscopic features.
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Affiliation(s)
- Hongxin Wang
- Department of Chemistry, University of California, 1 Cyclotron Road, Davis, CA 95616, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Yoshitaka Yoda
- Research and Utilization Division, SPring-8/JASRI, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Hideaki Ogata
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Yoshihito Tanaka
- Research and Utilization Division, SPring-8/JASRI, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Wolfgang Lubitz
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
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49
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Spiridis N, Zając M, Piekarz P, Chumakov AI, Freindl K, Goniakowski J, Kozioł-Rachwał A, Parliński K, Ślęzak M, Ślęzak T, Wdowik UD, Wilgocka-Ślęzak D, Korecki J. Phonons in Ultrathin Oxide Films: 2D to 3D Transition in FeO on Pt(111). PHYSICAL REVIEW LETTERS 2015; 115:186102. [PMID: 26565477 DOI: 10.1103/physrevlett.115.186102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Indexed: 06/05/2023]
Abstract
The structural and magnetic properties of ultrathin FeO(111) films on Pt(111) with thicknesses from 1 to 16 monolayers (MLs) were studied using the nuclear inelastic scattering of synchrotron radiation. A distinct evolution of vibrational characteristics with thickness, revealed in the phonon density of states (PDOS), shows a textbook transition from 2D to 3D lattice dynamics. For the thinnest films of 1 and 2 ML, the low-energy part of the PDOS followed a linear ∝E dependence in energy that is characteristic for two-dimensional systems. This dependence gradually transforms with thickness to the bulk ∝E^{2} relationship. Density-functional theory phonon calculations perfectly reproduced the measured 1-ML PDOS within a simple model of a pseudomorphic FeO/Pt(111) interface. The calculations show that the 2D PDOS character is due to a weak coupling of the FeO film to the Pt(111) substrate. The evolution of the vibrational properties with an increasing thickness is closely related to a transient long-range magnetic order and stabilization of an unusual structural phase.
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Affiliation(s)
- N Spiridis
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland
| | - M Zając
- European Synchrotron Radiation Facility (ESRF), P.O. Box 220, F-38043 Grenoble, France
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
| | - P Piekarz
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - A I Chumakov
- European Synchrotron Radiation Facility (ESRF), P.O. Box 220, F-38043 Grenoble, France
| | - K Freindl
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland
| | - J Goniakowski
- Sorbonne Universités, UPMC Université Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
| | - A Kozioł-Rachwał
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
| | - K Parliński
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - M Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
| | - T Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
| | - U D Wdowik
- Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland
| | - D Wilgocka-Ślęzak
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland
| | - J Korecki
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
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50
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Liu H, Tse JS, Hu MY, Bi W, Zhao J, Alp EE, Pasternak M, Taylor RD, Lashley JC. Mechanisms for pressure-induced crystal-crystal transition, amorphization, and devitrification of SnI4. J Chem Phys 2015; 143:164508. [DOI: 10.1063/1.4934502] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- H. Liu
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B2, Canada
| | - J. S. Tse
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B2, Canada
| | - M. Y. Hu
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - W. Bi
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - J. Zhao
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - E. E. Alp
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - M. Pasternak
- School of Physics and Astronomy, Tel Aviv University, Ramat Aviv, Israel
| | - R. D. Taylor
- Los Alamos National Laboratory, PO Box 1663 Bikini Atoll Road, Los Alamos, New Mexico 87545, USA
| | - J. C. Lashley
- Los Alamos National Laboratory, PO Box 1663 Bikini Atoll Road, Los Alamos, New Mexico 87545, USA
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