1
|
Zhang JR, Wang SY, Hua W. Core Hole Effect to Valence Excitations: Tracking and Visualizing the Same Excitation in XPS Shake-Up Satellites and UV Absorption Spectra. J Chem Theory Comput 2024; 20:6125-6133. [PMID: 38994655 DOI: 10.1021/acs.jctc.4c00521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Introducing a core hole significantly alters the electronic structure of a molecule, and various X-ray spectroscopy techniques are available for probing the valence electronic structure in the presence of a core hole. In this study, we visually demonstrate the influence of a core hole on valence excitations by computing the ultraviolet absorption spectra and the shake-up satellites in X-ray photoelectron spectra for pyrrole, furan, and thiophene, as complemented by the natural transition orbital (NTO) analysis over transitions with and without a core hole. Employing equivalent core hole time-dependent density functional theory (ECH-TDDFT) and TDDFT methods, we achieved balanced accuracy in both spectra for reliable comparative analysis. We tracked the same involved valence transition in both spectra, offering a vivid illustration of the core hole effect via the change in corresponding particle NTOs introduced by a 1s core hole on a Cα, Cβ, or O atom. Our analysis deepens the understanding of the core hole effect on valence transitions, a phenomenon ubiquitously observed in general X-ray spectroscopic analyses.
Collapse
Affiliation(s)
- Jun-Rong Zhang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Sheng-Yu Wang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Weijie Hua
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| |
Collapse
|
2
|
Opoku E, Pawłowski F, Ortiz JV. Ab Initio Electron Propagators with an Hermitian, Intermediately Normalized Superoperator Metric Applied to Vertical Electron Affinities. J Phys Chem A 2024; 128:4730-4749. [PMID: 38814678 DOI: 10.1021/acs.jpca.4c02050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
New-generation ab initio electron propagator methods for calculating electron detachment energies of closed-shell molecules and anions have surpassed their predecessors' accuracy and computational efficiency. Derived from an Hermitian, intermediately normalized superoperator metric, these methods contain no adjustable parameters. To assess their versatility, a standard set (NIST-50-EA) of 50 vertical electron affinities of small closed-shell molecules based on NIST reference data has been created. Errors with respect to reference data on 23 large, conjugated organic photovoltaic (OPV23) molecules have also been analyzed. All final states are valence anions that correspond to electron affinities between 0.2 and 4.2 eV. For a given scaling of the arithmetic bottleneck, the new-generation methods obtain the lowest mean absolute errors (MAEs). The best methods with fifth-power arithmetic scaling realize MAEs below 0.1 eV. Composite models comprising cubically and quintically scaling calculations executed with large and small basis sets, respectively, produce OPV23 MAEs near 0.05 eV. The accuracy of quintically scaling methods executed with large basis sets is thereby procured with reduced computational effort. New-generation results obtained with and without the diagonal self-energy approximation in the canonical Hartree-Fock basis have been compared. These results indicate that Dyson orbitals closely resemble canonical Hartree-Fock orbitals multiplied by the square root of a probability factor above 0.85.
Collapse
Affiliation(s)
- Ernest Opoku
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States
| | - Filip Pawłowski
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States
| | - J V Ortiz
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States
| |
Collapse
|
3
|
Opoku E, Pawłowski F, Ortiz JV. New-generation electron-propagator methods for vertical electron detachment energies of molecular anions: benchmarks and applications to model green-fluorescent-protein chromophores. Phys Chem Chem Phys 2024; 26:9915-9930. [PMID: 38482723 DOI: 10.1039/d4cp00441h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Ab initio electron-propagator calculations continue to be useful companions to experimental investigations of electronic structure in molecular anions. A new generation of electron-propagator methods recently has surpassed its antecedents' predictive accuracy and computational efficiency. Interpretive clarity has been conserved, for no adjustable parameters have been introduced in the preparation of molecular orbitals or in the formulation of approximate self-energies. These methods have employed the diagonal self-energy approximation wherein each Dyson orbital equals a canonical Hartree-Fock orbital times the square root of a probability factor. Numerical tests indicate that explicitly renormalized, diagonal self-energies are needed when Dyson orbitals have large valence nitrogen, oxygen or fluorine components. They also demonstrate that even greater accuracy can be realized with generalizations that do not employ the diagonal self-energy approximation in the canonical Hartree-Fock basis. Whereas the diagonal methods have fifth-power arithmetic scaling factors, the non-diagonal generalizations introduce only non-iterative sixth-power contractions. Composite models conserve the accuracy of the most demanding combinations of self-energy approximations and flexible basis sets with drastically reduced computational effort. Composite-model results on anions that resemble the chromophore of the green fluorescent protein illustrate the interpretive capabilities of explicitly renormalized self-energies. Accurate predictions on the lowest vertical electron detachment energy of each anion confirm experimental data and the utility of the diagonal self-energy approximation.
Collapse
Affiliation(s)
- Ernest Opoku
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849-5312, USA.
| | - Filip Pawłowski
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849-5312, USA.
| | - J V Ortiz
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849-5312, USA.
| |
Collapse
|
4
|
Bagus PS, Nelin CJ, Brundle CR, Crist BV, Ilton ES, Lahiri N, Rosso KM. Main and Satellite Features in the Ni 2p XPS of NiO. Inorg Chem 2022; 61:18077-18094. [DOI: 10.1021/acs.inorgchem.2c02549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, United States
| | | | | | | | - Eugene S. Ilton
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Nabajit Lahiri
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| |
Collapse
|
5
|
Balogun KY, Chukwunenye P, Anwar F, Ganesan A, Adesope Q, Willadsen D, Nemsak S, Cundari TR, Bagus PS, D'Souza F, Kelber JA. Interaction of molecular nitrogen with vanadium oxide in the absence and presence of water vapor at room temperature: Near-ambient pressure XPS. J Chem Phys 2022; 157:104701. [DOI: 10.1063/5.0107678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Interactions of N2 at oxide surfaces are important for understanding electrocatalytic nitrogen reduction reaction mechanisms. Interactions of N2 at the polycrystalline vanadium oxide/vapor interface were monitored at room temperature and total pressures up to 10-1 Torr using Near-Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS). The oxide film was predominantly V(IV), with V(III) and V(V) components. XPS spectra were acquired in environments of both pure N2 and equal pressures of N2 and H2O vapor. In pure N2, broad, partially resolved N1s features were observed at 401.0 eV and 398.7 eV binding energy, with relative intensities of ~ 3:1, respectively. These features remained upon subsequent pump down to 10-9 Torr. Observed maximum N surface coverage was ~ 1.5 x 1013 cm-2-a fraction of a monolayer. In the presence of equal pressures of H2O, the adsorbed N intensity at 10-1 Torr is ~ 25% of that observed in the absence of H2O. The formation of molecularly adsorbed H2O was also observed. Density functional theory-based calculations suggest favorable absorption energies for N2 bonding to both V(IV) and V(III) cation sites, but less so for V(V) sites. Hartree-Fock-based cluster calculations for N2-V end-on adsorption show that experimental XPS doublet features are consistent with calculated shake-up and normal, final ionic configurations, for N2 end-on bonding to V(III) sites, but not V(IV) sites. XPS spectra of vanadium oxide transferred in situ between electrochemical and UHV environments indicate that the oxide surfaces studied here are stable upon exposure to electrolyte under NRR-relevant conditions.
Collapse
Affiliation(s)
| | | | - Fatima Anwar
- University of North Texas, United States of America
| | | | | | | | - Slavomir Nemsak
- Lawrence Berkeley National Laboratory, United States of America
| | | | | | | | | |
Collapse
|
6
|
Satellite Excitations and Final State Interactions in Atomic Photoionization. ATOMS 2022. [DOI: 10.3390/atoms10030073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Satellite excitations and final state configuration interactions appear due to the many-electron correlations and result in a photoelectron spectrum complex final state structure instead of single lines corresponding to one-hole states. In the present work, both processes are considered in a framework of the many-body perturbation theory, and two techniques, namely the spectral function and CI (configuration interaction) methods are considered. It is shown that for the calculation of satellite lineshapes and low-energy Auger decay, the spectral function method is more appropriate, but in the case of strong final state interactions, the methods of solution of Dyson equation or secular matrix are superior. The results obtained for satellites and low energy Auger decay in the Ne 1s, Ne 2p photoelectron spectra, the Co 3s, and the Th 5p photoelectron spectra are in agreement with the experimental data.
Collapse
|
7
|
Tenorio BNC, Voß TA, Bokarev SI, Decleva P, Coriani S. Multireference Approach to Normal and Resonant Auger Spectra Based on the One-Center Approximation. J Chem Theory Comput 2022; 18:4387-4407. [PMID: 35737643 PMCID: PMC9281372 DOI: 10.1021/acs.jctc.2c00252] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A methodology to calculate the decay rates of normal and resonant Auger processes in atoms and molecules based on the One-Center Approximation (OCA), using atomic radial Auger integrals, is implemented within the restricted-active-space self-consistent-field (RASSCF) and the multistate restricted-active-space perturbation theory of second order (MS-RASPT2) frameworks, as part of the OpenMolcas project. To ensure an unbiased description of the correlation and relaxation effects on the initial core excited/ionized states and the final cationic states, their wave functions are optimized independently, whereas the Auger matrix elements are computed with a biorthonormalized set of molecular orbitals within the state-interaction (SI) approach. As a decay of an isolated resonance, the computation of Auger intensities involves matrix elements with one electron in the continuum. However, treating ionization and autoionization problems can be overwhelmingly complicated for nonexperts, because of many peculiarities, in comparison to bound-state electronic structure theory. One of the advantages of our approach is that by projecting the intensities on the atomic center bearing the core hole and using precalculated atomic radial two-electron integrals, the Auger decay rates can be easily obtained directly with OpenMolcas, avoiding the need to interface it with external programs to compute matrix elements with the photoelectron wave function. The implementation is tested on the Ne atom, for which numerous theoretical and experimental results are available for comparison, as well as on a set of prototype closed- and open-shell molecules, namely, CO, N2, HNCO, H2O, NO2, and C4N2H4 (pyrimidine).
Collapse
Affiliation(s)
- Bruno Nunes Cabral Tenorio
- DTU
Chemistry − Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
| | - Torben Arne Voß
- Institut
für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, D-18059 Rostock, Germany
| | - Sergey I. Bokarev
- Institut
für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, D-18059 Rostock, Germany
| | - Piero Decleva
- Istituto
Officina dei Materiali IOM−CNR and Dipartimento di Scienze
Chimiche e Farmaceutiche, Università
degli Studi di Trieste, I-34121 Trieste, Italy
| | - Sonia Coriani
- DTU
Chemistry − Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
- Department
of Chemistry, Norwegian University of Science
and Technology, N-7491 Trondheim, Norway
| |
Collapse
|
8
|
Ahsan MS, Kochetov V, Hein D, Bokarev SI, Wilkinson I. Probing the molecular structure of aqueous triiodide via X-ray photoelectron spectroscopy and correlated electron phenomena. Phys Chem Chem Phys 2022; 24:15540-15555. [PMID: 35713286 DOI: 10.1039/d1cp05840a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid-microjet-based X-ray photoelectron spectroscopy was applied to aqueous triiodide solutions, I3-(aq.), to investigate the anion's valence- and core-level electronic structure, ionization dynamics, associated electron-correlation effects, and nuclear geometric structure. The roles of multi-active-electron (shake-up) ionization processes - with noted sensitivity to the solute geometric structure - were investigated through I3-(aq.) solution valence, I 4d, and I 3d core-level measurements. The experimental spectra were interpreted with the aid of simulated photoelectron spectra, built upon multi-reference ab initio electronic structure calculations associated with different I3-(aq.) molecular geometries. A comparison of the single-to-multi-active-electron ionization signal ratios extracted from the experimental and theoretical core-level photoemission spectra suggests that the ground state of the solute adopts a near-linear average geometry in aqueous solutions. This contrasts with the interpretation of time-resolved X-ray solution scattering studies, but is found to be fully consistent with the rest of the solution-phase I3-(aq.) literature. Comparing the results of low- and high-photon-energy photoemission measurements, we further suggest that the aqueous anion adopts a more asymmetric geometry at the aqueous-solution-gas interface than in the aqueous bulk.
Collapse
Affiliation(s)
- Md Sabbir Ahsan
- Department of Locally-Sensitive and Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany. .,Department of Physics, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Vladislav Kochetov
- Institut für Physik, Universität Rostock, Albert Einstein Str. 23-24, D-18059 Rostock, Germany
| | - Dennis Hein
- Operando Interfacial Photochemistry, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-platz. 1, D-14109 Berlin, Germany.,Department of Physics, Humboldt-Universität zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany
| | - Sergey I Bokarev
- Institut für Physik, Universität Rostock, Albert Einstein Str. 23-24, D-18059 Rostock, Germany
| | - Iain Wilkinson
- Department of Locally-Sensitive and Time-Resolved Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany.
| |
Collapse
|
9
|
Bagus PS, Nelin CJ, Brundle CR, Crist BV, Lahiri N, Rosso KM. Origin of the complex main and satellite features in Fe 2p XPS of Fe 2O 3. Phys Chem Chem Phys 2022; 24:4562-4575. [PMID: 35129561 DOI: 10.1039/d1cp04886d] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although the origin and assignment of the complex XPS features of the cations in ionic compounds has been the subject of extensive theoretical work, agreement with experimental observations remains insufficient for unambiguous interpretation. This paper presents a rigorous ab initio treatment of the main and satellite features in the Fe 2p XPS of Fe2O3. This has been possible using a unique methodology for the selection of orbitals that are used to form the ionic wavefunctions. This orbital selection makes it possible to treat both the angular momentum coupling of the open shell core and valence electrons as well the shake excitations from the closed shell orbitals associated with the O ligands into the valence open shell orbitals associated with the Fe 3d shell. This allows the character of the ionic states in terms of the occupations of the open shell core and valence orbitals and of the contributions of 2p1/2 and 2p3/2 ionization to the XPS intensities to be determined. Our analysis gives strong evidence that many body effects are essential for a correct description of the ionic states and, in general the states cannot be described by a single configuration over the open shell orbitals. An important consequence is that the Fe 2p XPS intensity in most of the features arises from small contributions from the ionization to many, tens to hundreds, of often unresolved ionic states. While the usual understanding of the lower binding energy main and satellite features as being dominantly from 2p3/2 ionization is confirmed, this is not the case for the higher binding energy features where 2p1/2 and 2p3/2 ionization and shake excitations in the valence space mix strongly. Furthermore, we have been able to show that a very large fraction, 88%, of the total Fe 2p XPS intensity is contained in a relatively small binding energy range of ∼35 eV. This is relevant if one wants to extract the stoichiometry of Fe2O3 from Fe 2p/O 1s intensity ratios. Similar considerations about the importance of many-body effects are likely to be relevant for other ionic compounds as well.
Collapse
Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, TX 76203-5017, USA.
| | | | - C R Brundle
- C. R. Brundle and Associates, Soquel, CA 95073, USA
| | | | - N Lahiri
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| |
Collapse
|
10
|
Ferté A, Penent F, Palaudoux J, Iwayama H, Shigemasa E, Hikosaka Y, Soejima K, Lablanquie P, Taïeb R, Carniato S. Specific chemical bond relaxation unraveled by analysis of shake-up satellites in the oxygen single site double core hole spectrum of CO 2. Phys Chem Chem Phys 2021; 24:1131-1146. [PMID: 34928271 DOI: 10.1039/d1cp03947d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We recently developed [A. Ferté, et al., J. Phys. Chem. Lett., 2020, 11, 4359] a method to compute single site double core hole (ssDCH or K-2) spectra. We refer to that method as NOTA+CIPSI. In the present paper this method is applied to the O K-2 spectrum of the CO2 molecule, and we use this as an example to discuss in detail its convergence properties. Using this approach, theoretical spectra in excellent agreement with the experimental one are obtained. Thanks to a thorough interpretation of the shake-up states responsible for the main satellite peaks and through comparison with the O K-2 spectrum of CO, we can highlight the clear signature of the two non-equivalent carbon oxygen bonds in the oxygen ssDCH CO2 dication.
Collapse
Affiliation(s)
- Anthony Ferté
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| | - Francis Penent
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| | - Jérôme Palaudoux
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| | - Hiroshi Iwayama
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Eiji Shigemasa
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Yasumasa Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Kouichi Soejima
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - Pascal Lablanquie
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| | - Richard Taïeb
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| | - Stéphane Carniato
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France.
| |
Collapse
|
11
|
Tenorio BNC, Decleva P, Coriani S. Multi-reference approach to the computation of double core-hole spectra. J Chem Phys 2021; 155:131101. [PMID: 34624974 DOI: 10.1063/5.0062130] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Double Core-Hole (DCH) states of small molecules are assessed with the restricted active space self-consistent field and multi-state restricted active space perturbation theory of second order approximations. To ensure an unbiased description of the relaxation and correlation effects on the DCH states, the neutral ground-state and DCH wave functions are optimized separately, whereas the spectral intensities are computed with a biorthonormalized set of molecular orbitals within the state-interaction approximation. Accurate shake-up satellite binding energies and intensities of double-core-ionized states (K-2) are obtained for H2O, N2, CO, and C2H2n (n = 1-3). The results are analyzed in detail and show excellent agreement with recent theoretical and experimental data. The K-2 shake-up spectra of H2O and C2H2n molecules are here completely characterized for the first time.
Collapse
Affiliation(s)
- Bruno Nunes Cabral Tenorio
- DTU Chemistry - Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, 2800 Kongens Lyngby, Denmark
| | - Piero Decleva
- Istituto Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, I-34121 Trieste, Italy
| | - Sonia Coriani
- DTU Chemistry - Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, 2800 Kongens Lyngby, Denmark
| |
Collapse
|
12
|
Bagus PS, Nelin CJ, Brundle CR, Crist BV, Lahiri N, Rosso KM. Comments on the Theory of Complex XPS Spectra: Extracting Chemical Information from the Fe 3p XPS of Fe Oxides. COMMENT INORG CHEM 2021. [DOI: 10.1080/02603594.2021.1938007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas, USA
| | | | - C. R. Brundle
- C. R. Brundle and Associates, Soquel, California, USA
| | | | - N. Lahiri
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington, USA
| |
Collapse
|
13
|
Li S, Driver T, Alexander O, Cooper B, Garratt D, Marinelli A, Cryan JP, Marangos JP. Time-resolved pump-probe spectroscopy with spectral domain ghost imaging. Faraday Discuss 2021; 228:488-501. [PMID: 33625412 DOI: 10.1039/d0fd00122h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An atomic-level picture of molecular and bulk processes, such as chemical bonding and charge transfer, necessitates an understanding of the dynamical evolution of these systems. On the ultrafast timescales associated with nuclear and electronic motion, the temporal behaviour of a system is often interrogated in a 'pump-probe' scheme. Here, an initial 'pump' pulse triggers dynamics through photoexcitation, and after a carefully controlled delay a 'probe' pulse initiates projection of the instantaneous state of the evolving system onto an informative measurable quantity, such as electron binding energy. In this paper, we apply spectral ghost imaging to a pump-probe time-resolved experiment at an X-ray free-electron laser (XFEL) facility, where the observable is spectral absorption in the X-ray regime. By exploiting the correlation present in the shot-to-shot fluctuations in the incoming X-ray pulses and measured electron kinetic energies, we show that spectral ghost imaging can be applied to time-resolved pump-probe measurements. In the experiment presented, interpretation of the measurement is simplified because spectral ghost imaging separates the overlapping contributions to the photoelectron spectrum from the pump and probe pulse.
Collapse
Affiliation(s)
- Siqi Li
- Accelerator Research Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Taran Driver
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, USA and Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Oliver Alexander
- Quantum Optics and Laser Science Group, Blackett Laboratory, Imperial College London, London, SW7 2BW, UK
| | - Bridgette Cooper
- Atomic, Molecular, Optical and Positron Physics Group, Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
| | - Douglas Garratt
- Quantum Optics and Laser Science Group, Blackett Laboratory, Imperial College London, London, SW7 2BW, UK
| | - Agostino Marinelli
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, USA and Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - James P Cryan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, USA and Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jonathan P Marangos
- Quantum Optics and Laser Science Group, Blackett Laboratory, Imperial College London, London, SW7 2BW, UK
| |
Collapse
|
14
|
Bagus PS, Nelin CJ, Brundle CR, Crist BV, Lahiri N, Rosso KM. Combined multiplet theory and experiment for the Fe 2p and 3p XPS of FeO and Fe 2O 3. J Chem Phys 2021; 154:094709. [PMID: 33685168 DOI: 10.1063/5.0039765] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Al K alpha, 1486.6 eV, based x-ray photoelectron spectroscopy (XPS) of Fe 2p and Fe 3p for Fe(III) in Fe2O3 and Fe(II) in FeO is compared with theoretical predictions based on ab initio wavefunctions that accurately treat the final, core-hole, multiplets. The principal objectives of this comparison are to understand the multiplet structure and to evaluate the use of both the 2p and 3p spectra in determining oxidation states. In order to properly interpret the features of these spectra and to use the XPS to provide atomistic insights as well as atomic composition, it is necessary to understand the origin of the multiplet energies and intensities. The theoretical treatment takes into account the ligand field and spin-orbit splittings, the covalent mixing of ligand and Fe 3d orbitals, and the angular momentum coupling of the open shell electrons. These effects lead to the distribution of XPS intensity into a large number of final, ionic, states that are only partly resolved with energies spread over a wide range of binding energies. For this reason, it is necessary to record the Fe 2p and 3p XPS spectra over a wide energy range, which includes all the multiplets in the theoretical treatment as well as additional shake satellites. We also evaluate the effects of differing assumptions concerning the extrinsic background subtraction, to make sure our experimental spectrum may be fairly compared to the theory. We conclude that the Fe 3p XPS provides an additional means for distinguishing Fe(III) and Fe(II) oxidation states beyond just using the Fe 2p spectrum. In particular, with the use of the Fe 3p XPS, the depth of the material probed is about 1.5 times greater than for the Fe 2p XPS. In addition, a new type of atomic many-body effect that involves excitations into orbitals that have Fe f,ℓ = 3, symmetry has been shown to be important for the Fe 3p XPS.
Collapse
Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | | | - C R Brundle
- C. R. Brundle and Associates, Soquel, California 95073, USA
| | | | - N Lahiri
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| |
Collapse
|
15
|
Bagus PS, Nelin CJ, Brundle CR, Vincent Crist B, Lahiri N, Rosso KM. Covalency in Fe 2O 3 and FeO: Consequences for XPS satellite intensity. J Chem Phys 2020; 153:194702. [PMID: 33218235 DOI: 10.1063/5.0030350] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The covalent character of the interaction between the metal cation and the oxygen ligands has been examined for two Fe oxides with different nominal oxidation states, Fe(II)O, and Fe(III)2O3. The covalent character is examined for the initial, ground state configuration and for the ionic states involving the removal of a shallow core, Fe 3p, and a deep core, Fe 2p, electron. The covalency is assessed based on novel theoretical analyses of wave functions for the various cases. It is found that the covalency is considerably different for different oxidation states and for different ionized and non-ionized configurations. The changes in covalency for the ions are shown to be responsible for important changes in relaxation energies for X-Ray Photoelectron Spectroscopy (XPS) spectra and in the intensity lost from main XPS peaks to shake satellites. While these consequences are not observables themselves, they are important for the interpretation of the XPS spectra, in particular, for efforts to extract stoichiometries of these iron oxides from XPS data. This is a finding likely applicable across various 3d transition metal oxide materials.
Collapse
Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | | | - C R Brundle
- C. R. Brundle and Associates, Soquel, California 95073, USA
| | | | - N Lahiri
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| |
Collapse
|
16
|
Bagus PS, Sousa C, Illas F. Limitations of the equivalent core model for understanding core-level spectroscopies. Phys Chem Chem Phys 2020; 22:22617-22626. [PMID: 33015691 DOI: 10.1039/d0cp03569f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The equivalent core model, or the Z + 1 approximation, has been used to interpret the binding energy, BE, shifts observed in X-ray photoelectron spectroscopy, XPS; in particular to relate these shifts to their origin in the electronic structure of the system. Indeed, a recent paper has claimed that the equivalent core model provides an intuitive chemical view of XPS BE shifts. In the present paper, we present a detailed comparison of the electronic structure provided from rigorous core-hole theory and from the equivalent core model to assess the validity and the utility of the use of the equivalent core model. This comparison shows that the equivalent core model provides a qualitative view of the different properties of initial and core-hole electronic structure. It is also shown that a very serious limitation of the equivalent core model is that it fails to distinguish between initial and final state contributions to the shifts of BEs which seriously reduces the utility of the information obtained with the equivalent core model. Indeed, there is a danger of making an incorrect assignment of the importance of relaxation because the equivalent core model appears to stress the role of final state effects. Given the importance of the distinction of initial and final state effects, we provide rigorous definitions of these two effects and we discuss an example where an incorrect interpretation was made based on the use of the equivalent core model.
Collapse
Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, TX 76203-5017, USA.
| | | | | |
Collapse
|
17
|
Bagus PS, Brundle C, Ilton ES. A rigorous non-empirical theoretical analysis of the 2p XPS of NiO: Is it necessary to invoke nonlocal screening? J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
18
|
Ortiz JV, Zalik RA. Eigenvalues of uncorrelated, density-difference matrices and the interpretation of Δ-self-consistent-field calculations. J Chem Phys 2020; 153:114122. [DOI: 10.1063/5.0019542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. V. Ortiz
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, USA
| | - R. A. Zalik
- Department of Mathematics and Statistics, Auburn University, Auburn, Alabama 36849-5310, USA
| |
Collapse
|
19
|
Ferté A, Palaudoux J, Penent F, Iwayama H, Shigemasa E, Hikosaka Y, Soejima K, Ito K, Lablanquie P, Taïeb R, Carniato S. Advanced Computation Method for Double Core Hole Spectra: Insight into the Nature of Intense Shake-up Satellites. J Phys Chem Lett 2020; 11:4359-4366. [PMID: 32392416 DOI: 10.1021/acs.jpclett.0c01167] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Double core hole spectroscopy is an ideal framework for investigating photoionization shake-up satellites. Their important intensity in a single site double core hole (ssDCH) spectrum allows the exploration of the subtle mix of relaxation and correlation effects associated with the inherent multielectronic character of the shake-up process. We present a high-accuracy computation method for single photon double core-shell photoelectron spectra that combines a selected configuration interaction procedure with the use of non-orthogonal molecular orbitals to obtain unbiased binding energy and intensity. This strategy leads to the oxygen ssDCH spectrum of the CO molecule that is in excellent agreement with the experimental result. Through a combined wave function and density analysis, we highlight that the most intense shake-up satellites are characterized by an electronic reorganization that opposes the core hole-induced relaxation.
Collapse
Affiliation(s)
- Anthony Ferté
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| | - Jérôme Palaudoux
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| | - Francis Penent
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| | - Hiroshi Iwayama
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Eiji Shigemasa
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Yasumasa Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Kouichi Soejima
- Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801, Japan
| | - Kenji Ito
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - Pascal Lablanquie
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| | - Richard Taïeb
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| | - Stéphane Carniato
- Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), Sorbonne Université and CNRS, F-75005 Paris, France
| |
Collapse
|
20
|
Woicik JC, Weiland C, Rumaiz AK, Brumbach MT, Ablett JM, Shirley EL, Kas JJ, Rehr JJ. Core hole processes in x-ray absorption and photoemission by resonant Auger-electron spectroscopy and first-principles theory. PHYSICAL REVIEW. B 2020; 101:10.1103/physrevb.101.245105. [PMID: 34409241 PMCID: PMC8370031 DOI: 10.1103/physrevb.101.245105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electron-core hole interactions are critical for proper interpretation of core-level spectroscopies commonly used as analytical tools in materials science. Here we utilize resonant Auger-electron spectroscopy to uniquely identify exciton, shake, and charge-transfer processes that result from the sudden creation of the core hole in both x-ray-absorption and photoemission spectra. These effects are captured for the transition-metal compounds SrTiO3 and MoS2 by fully ab initio, combined real-time cumulant, and Bethe-Salpeter equation approaches to account for core hole dynamics and screening. Atomic charges and excited-state electron-density fluctuations reflect materials' solid-state electronic structure, loss of translational symmetry around the core hole, and breakdown of the sudden approximation. They also demonstrate competition between long- and short-range screening in a solid.
Collapse
Affiliation(s)
- J C Woicik
- Material Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - C Weiland
- Material Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - A K Rumaiz
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M T Brumbach
- Materials Characterization Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
| | - J M Ablett
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette Cedex, France
| | - E L Shirley
- Sensor Science Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - J J Kas
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - J J Rehr
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| |
Collapse
|
21
|
Woicik JC, Weiland C, Jaye C, Fischer DA, Rumaiz AK, Shirley EL, Kas JJ, Rehr JJ. Charge-transfer satellites and chemical bonding in photoemission and x-ray absorption of SrTiO 3 and rutile TiO 2: Experiment and first-principles theory with general application to spectroscopic analysis. PHYSICAL REVIEW. B 2020; 101:10.1103/physrevb.101.245119. [PMID: 34409240 PMCID: PMC8370030 DOI: 10.1103/physrevb.101.245119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
First-principles, real-time-cumulant, and Bethe-Salpeter-equation calculations fully capture the detailed satellite structure that occurs in response to the sudden creation of the core hole in both photoemission and x-ray absorption spectra of the transition-metal compounds SrTiO3 and rutile TiO2. Analysis of the excited-state, real-space charge-density fluctuations betrays the physical nature of these many electron excitations that are shown to reflect the materials' solid-state electronic structure and chemical bonding. This first-principles development of the cumulant-based core hole spectral function is generally applicable to other systems and should become a standard tool for all similar spectroscopic analysis going beyond the quasiparticle physics of the photoelectric effect.
Collapse
Affiliation(s)
- J C Woicik
- Materials Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - C Weiland
- Materials Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - C Jaye
- Materials Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - D A Fischer
- Materials Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - A K Rumaiz
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E L Shirley
- Sensor Science Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - J J Kas
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - J J Rehr
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| |
Collapse
|
22
|
|
23
|
Bagus PS, Nelin CJ, Brundle CR, Lahiri N, Ilton ES, Rosso KM. Analysis of the Fe 2p XPS for hematite α Fe2O3: Consequences of covalent bonding and orbital splittings on multiplet splittings. J Chem Phys 2020; 152:014704. [DOI: 10.1063/1.5135595] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | | | - C. R. Brundle
- C. R. Brundle and Associates, Soquel, California 95073, USA
| | - N. Lahiri
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Eugene S. Ilton
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| |
Collapse
|
24
|
Carniato S, Selles P, Ferté A, Berrah N, Wuosmaa AH, Nakano M, Hikosaka Y, Ito K, Žitnik M, Bučar K, Andric L, Palaudoux J, Penent F, Lablanquie P. Double-core ionization photoelectron spectroscopy of C6H6: Breakdown of the “intuitive” ortho-meta-para binding energy ordering of K−1K−1 states. J Chem Phys 2019; 151:214303. [DOI: 10.1063/1.5128614] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Carniato
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - P. Selles
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - A. Ferté
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - N. Berrah
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
| | - A. H. Wuosmaa
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
| | - M. Nakano
- Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801, Japan
| | - Y. Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - K. Ito
- Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801, Japan
- Synchrotron SOLEIL, l’Orme des Merisiers, Saint-Aubin, Boîte Postale 48, 91192 Gif-sur-Yvette Cedex, France
| | - M. Žitnik
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenija
| | - K. Bučar
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenija
| | - L. Andric
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - J. Palaudoux
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - F. Penent
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - P. Lablanquie
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| |
Collapse
|
25
|
Bokarev SI, Kühn O. Theoretical X‐ray spectroscopy of transition metal compounds. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2019. [DOI: 10.1002/wcms.1433] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Oliver Kühn
- Institut für Physik Universität Rostock Rostock Germany
| |
Collapse
|
26
|
Trofimov AB, Belogolova AM, Serebrennikova SA, Forbes R, Pratt ST, Holland DMP. An experimental and theoretical study of the C 1s ionization satellites in CH 3I. J Chem Phys 2019; 150:224303. [PMID: 31202236 DOI: 10.1063/1.5099699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The C 1s ionization spectrum of CH3I has been studied both experimentally and theoretically. Synchrotron radiation has been employed to record polarization dependent photoelectron spectra at a photon energy of 614 eV. These spectra encompass the main-line due to the C 1s single-hole state and the peaks associated with the shake-up satellites. Vertical ionization energies and relative photoelectron intensities have been computed using the fourth-order algebraic-diagrammatic construction approximation scheme for the one-particle Green's function and the 6-311++G** basis set. The theoretical spectrum derived from these calculations agrees qualitatively with the experimental results, thereby allowing the principal spectral features to be assigned. According to our calculations, two 2A1 shake-up states of the C 1s-1 σCI → σCI * type with singlet and triplet intermediate coupling of the electron spins (S' = 0, 1) play an important role in the spectrum and contribute significantly to the overall intensity. Both of these states are expected to have dissociative diabatic potential energy surfaces with respect to the C-I separation. Whereas the upper of these states perturbs the manifold of Rydberg states, the lower state forms a band which is characterized by a strongly increased width. Our results indicate that the lowest shake-up peak with significant spectral intensity is due to the pair (S' = 0, 1) of 2E (C 1s-1 I 5p → σCI *) states. We predict that these 2E states acquire photoelectron intensity due to spin-orbit interaction. Such interactions play an important role here due to the involvement of the I 5p orbitals.
Collapse
Affiliation(s)
- A B Trofimov
- Laboratory of Quantum Chemistry, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - A M Belogolova
- Laboratory of Quantum Chemistry, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - S A Serebrennikova
- Laboratory of Quantum Chemistry, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - R Forbes
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - S T Pratt
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - D M P Holland
- Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, United Kingdom
| |
Collapse
|
27
|
|
28
|
Manna S, Mishra S. Vibronic structure and photoelectron angular distribution in the photoelectron spectrum of ICN. J Chem Phys 2018; 149:204308. [DOI: 10.1063/1.5050461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Soumitra Manna
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| |
Collapse
|
29
|
Möhle T, Bokareva OS, Grell G, Kühn O, Bokarev SI. Tuned Range-Separated Density Functional Theory and Dyson Orbital Formalism for Photoelectron Spectra. J Chem Theory Comput 2018; 14:5870-5880. [DOI: 10.1021/acs.jctc.8b00707] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T. Möhle
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23-24, 18059 Rostock, Germany, and
| | - O. S. Bokareva
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23-24, 18059 Rostock, Germany, and
- Department of Physical Chemistry, Kazan Federal University, Kremlevskaya Street 18, 420008, Kazan, Russia
| | - G. Grell
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23-24, 18059 Rostock, Germany, and
| | - O. Kühn
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23-24, 18059 Rostock, Germany, and
| | - S. I. Bokarev
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23-24, 18059 Rostock, Germany, and
| |
Collapse
|
30
|
Paparazzo E. Use and mis-use of x-ray photoemission spectroscopy Ce3d spectra of Ce 2O 3 and CeO 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:343003. [PMID: 29988022 DOI: 10.1088/1361-648x/aad248] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
X-ray photoemission spectroscopy (XPS) work on Ce2O3 and CeO2 oxides has been an active topic of research over the past four decades or so. Such research aimed to find the reasons for the unusual complexity of Ce3d spectra of the two oxides, and it studied catalytic properties of materials that contained them. I discuss how theoretical and experimental studies exploited the diagnostic potential of XPS to reach our current knowledge of the electronic properties of the two oxides. A part of these studies provided peak-fitting guidelines to resolve Ce3d spectra produced by the co-existence of both oxides into the individual spectral components arising from Ce3+ and Ce4+ ions. Basing myself on the analysis of several peak-fittings of Ce3d spectra carried out in studies of the catalytic applications of CeO2-based materials, I show that more often than not they largely ignore the findings of theoretical, experimental, and methodological XPS work. I discuss typical problems that flaw Ce3d peak-fittings, and how they affect their accuracy. I argue that, although several XPS studies do list primary literature of Ce3d spectra in their bibliography, they often do so for decorative purposes, rather than practical purposes.
Collapse
Affiliation(s)
- Ernesto Paparazzo
- Istituto di Struttura della Materia del CNR, Via Fosso del Cavaliere 100, 00133 Rome, Italy
| |
Collapse
|
31
|
Tehlar A, von Conta A, Arasaki Y, Takatsuka K, Wörner HJ. Ab initio calculation of femtosecond-time-resolved photoelectron spectra of NO 2 after excitation to the A-band. J Chem Phys 2018; 149:034307. [PMID: 30037246 DOI: 10.1063/1.5029365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present calculations of time-dependent photoelectron spectra of NO2 after excitation to the A-band for comparison with extreme-ultraviolet (XUV) time-resolved photoelectron spectroscopy. We employ newly calculated potential energy surfaces of the two lowest-lying coupled 2A' states obtained from multi-reference configuration-interaction calculations to propagate the photo-excited wave packet using a split-step-operator method. The propagation includes the nonadiabatic coupling of the potential surfaces as well as the explicit interaction with the pump pulse centered at 3.1 eV (400 nm). A semiclassical approach to calculate the time-dependent photoelectron spectrum arising from the ionization to the eight energetically lowest-lying states of the cation allows us to reproduce the static experimental spectrum up to a binding energy of 16 eV and enables direct comparisons with XUV time-resolved photoelectron spectroscopy.
Collapse
Affiliation(s)
- Andres Tehlar
- Laboratory for Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Aaron von Conta
- Laboratory for Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Yasuki Arasaki
- Fukui Institute for Fundamental Chemistry, Kyoto University, Sakyo-ku, Kyoto 606-8103, Japan
| | - Kazuo Takatsuka
- Fukui Institute for Fundamental Chemistry, Kyoto University, Sakyo-ku, Kyoto 606-8103, Japan
| | - Hans Jakob Wörner
- Laboratory for Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| |
Collapse
|
32
|
Bagus PS, Ilton E, Nelin CJ. Extracting Chemical Information from XPS Spectra: A Perspective. Catal Letters 2018. [DOI: 10.1007/s10562-018-2417-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
33
|
Gavrielides A, Duguet T, Esvan J, Lacaze-Dufaure C, Bagus PS. A poly-epoxy surface explored by Hartree-Fock ΔSCF simulations of C1s XPS spectra. J Chem Phys 2017; 145:074703. [PMID: 27544119 DOI: 10.1063/1.4960762] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Whereas poly-epoxy polymers represent a class of materials with a wide range of applications, the structural disorder makes them difficult to model. In the present work, we use good experimental model samples in the sense that they are pure, fully polymerized, flat and smooth, defect-free, and suitable for ultrahigh vacuum x-ray photoelectron spectroscopy, XPS, experiments. In parallel, we perform Hartree-Fock, HF, calculations of the binding energies, BEs, of the C1s electrons in a model molecule composed of the two constituents of the poly-epoxy sample. These C1s BEs were determined using the HF ΔSCF method, which is known to yield accurate values, especially for the shifts of the BEs, ΔBEs. We demonstrate the benefits of combining rigorous theory with careful XPS measurements in order to obtain correct assignments of the C1s XPS spectra of the polymer sample. Both the relative binding energies-by the ΔSCF method-and relative intensities-in the sudden approximation, SA, are calculated. It results in an excellent match with the experimental spectra. We are able to identify 9 different chemical environments under the C1s peak, where an exclusively experimental work would have found only 3 contributions. In addition, we observe that some contributions are localized at discrete binding energies, whereas others allow a much wider range because of the variation of their second neighbor bound polarization. Therefore, HF-ΔSCF simulations significantly increase the spectral resolution of XPS and thus offer a new avenue for the exploration of the surface of polymers.
Collapse
Affiliation(s)
- A Gavrielides
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - T Duguet
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - J Esvan
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - C Lacaze-Dufaure
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - P S Bagus
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203, USA
| |
Collapse
|
34
|
Ruckenbauer M, Mai S, Marquetand P, González L. Revealing Deactivation Pathways Hidden in Time-Resolved Photoelectron Spectra. Sci Rep 2016; 6:35522. [PMID: 27762396 PMCID: PMC5071879 DOI: 10.1038/srep35522] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 09/27/2016] [Indexed: 11/09/2022] Open
Abstract
Time-resolved photoelectron spectroscopy is commonly employed with the intention to monitor electronic excited-state dynamics occurring in a neutral molecule. With the help of theory, we show that when excited-state processes occur on similar time scales the different relaxation pathways are completely obscured in the total photoionization signal recorded in the experiment. Using non-adiabatic molecular dynamics and Dyson norms, we calculate the photoionization signal of cytosine and disentangle the transient contributions originating from the different deactivation pathways of its tautomers. In the simulations, the total signal from the relevant keto and enol tautomers can be decomposed into contributions either from the neutral electronic state populations or from the distinct mechanistic pathways across the multiple potential surfaces. The lifetimes corresponding to these contributions cannot be extracted from the experiment, thereby illustrating that new experimental setups are necessary to unravel the intricate non-adiabatic pathways occurring in polyatomic molecules after irradiation by light.
Collapse
Affiliation(s)
- Matthias Ruckenbauer
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| | - Sebastian Mai
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| | - Philipp Marquetand
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| | - Leticia González
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| |
Collapse
|
35
|
Bagus PS, Sousa C, Illas F. Consequences of electron correlation for XPS binding energies: Representative case for C(1s) and O(1s) XPS of CO. J Chem Phys 2016; 145:144303. [DOI: 10.1063/1.4964320] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | - Carme Sousa
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| |
Collapse
|
36
|
Grell G, Bokarev SI, Winter B, Seidel R, Aziz EF, Aziz SG, Kühn O. Erratum: “Multi-reference approach to the calculation of photoelectron spectra including spin-orbit coupling” [J. Chem. Phys. 143, 074104 (2015)]. J Chem Phys 2016; 145:089901. [DOI: 10.1063/1.4961314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Gilbert Grell
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock, Germany
| | - Sergey I. Bokarev
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Department of Physics, Freie Universität zu Berlin, Arnimalle 14, 14159 Berlin, Germany
| | - Saadullah G. Aziz
- Chemistry Department, Faculty of Science, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
| | - Oliver Kühn
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock, Germany
| |
Collapse
|
37
|
Kuleff AI, Kryzhevoi NV, Pernpointner M, Cederbaum LS. Core Ionization Initiates Subfemtosecond Charge Migration in the Valence Shell of Molecules. PHYSICAL REVIEW LETTERS 2016; 117:093002. [PMID: 27610850 DOI: 10.1103/physrevlett.117.093002] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Indexed: 05/23/2023]
Abstract
After the ionization of a valence electron, the created hole can migrate ultrafast from one end of the molecule to another. Because of the advent of attosecond pulse techniques, the measuring and understanding of charge migration has become a central topic in attosecond science. Here, we pose the hitherto unconsidered question whether ionizing a core electron will also lead to charge migration. It is found that the created hole in the core stays put, but in response to this hole interesting electron dynamics takes place which can lead to intense charge migration in the valence shell. This migration is typically faster than that after the ionization of a valence electron and transpires on a shorter time scale than the natural decay of the core hole by the Auger process, making the subject very challenging to attosecond science.
Collapse
Affiliation(s)
- Alexander I Kuleff
- Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Nikolai V Kryzhevoi
- Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Markus Pernpointner
- Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Lorenz S Cederbaum
- Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| |
Collapse
|
38
|
Zhou JS, Kas JJ, Sponza L, Reshetnyak I, Guzzo M, Giorgetti C, Gatti M, Sottile F, Rehr JJ, Reining L. Dynamical effects in electron spectroscopy. J Chem Phys 2015; 143:184109. [DOI: 10.1063/1.4934965] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jianqiang Sky Zhou
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
| | - J. J. Kas
- European Theoretical Spectroscopy Facility (ETSF)
- Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
| | - Lorenzo Sponza
- Department of Physics, King’s College London, London WC2R 2LS, United Kingdom
| | - Igor Reshetnyak
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
| | - Matteo Guzzo
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany
| | - Christine Giorgetti
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
| | - Matteo Gatti
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette, France
| | - Francesco Sottile
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
| | - J. J. Rehr
- European Theoretical Spectroscopy Facility (ETSF)
- Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
| | - Lucia Reining
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA-DSM-IRAMIS, Université Paris-Saclay, F-91128 Palaiseau, France
- European Theoretical Spectroscopy Facility (ETSF)
| |
Collapse
|
39
|
Grell G, Bokarev SI, Winter B, Seidel R, Aziz EF, Aziz SG, Kühn O. Multi-reference approach to the calculation of photoelectron spectra including spin-orbit coupling. J Chem Phys 2015; 143:074104. [PMID: 26298112 DOI: 10.1063/1.4928511] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
X-ray photoelectron spectra provide a wealth of information on the electronic structure. The extraction of molecular details requires adequate theoretical methods, which in case of transition metal complexes has to account for effects due to the multi-configurational and spin-mixed nature of the many-electron wave function. Here, the restricted active space self-consistent field method including spin-orbit coupling is used to cope with this challenge and to calculate valence- and core-level photoelectron spectra. The intensities are estimated within the frameworks of the Dyson orbital formalism and the sudden approximation. Thereby, we utilize an efficient computational algorithm that is based on a biorthonormal basis transformation. The approach is applied to the valence photoionization of the gas phase water molecule and to the core ionization spectrum of the [Fe(H2O)6](2+) complex. The results show good agreement with the experimental data obtained in this work, whereas the sudden approximation demonstrates distinct deviations from experiments.
Collapse
Affiliation(s)
- Gilbert Grell
- Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
| | - Sergey I Bokarev
- Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Saadullah G Aziz
- Chemistry Department, Faculty of Science, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
| | - Oliver Kühn
- Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
| |
Collapse
|
40
|
Carniato S, Selles P, Andric L, Palaudoux J, Penent F, Žitnik M, Bučar K, Nakano M, Hikosaka Y, Ito K, Lablanquie P. Single photon simultaneous K-shell ionization and K-shell excitation. I. Theoretical model applied to the interpretation of experimental results on H2O. J Chem Phys 2015; 142:014307. [PMID: 25573561 DOI: 10.1063/1.4904273] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- S Carniato
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - P Selles
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - L Andric
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - J Palaudoux
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - F Penent
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - M Žitnik
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - K Bučar
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
| | - Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - K Ito
- Institute of Materials Structure Science, Photon Factory, Tsukuba, Ibaraki 305-0801, Japan
| | - P Lablanquie
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| |
Collapse
|
41
|
Wu P, Yu Y, McGhee CE, Tan LH, Lu Y. Applications of synchrotron-based spectroscopic techniques in studying nucleic acids and nucleic acid-functionalized nanomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7849-72. [PMID: 25205057 PMCID: PMC4275547 DOI: 10.1002/adma.201304891] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 06/02/2014] [Indexed: 05/22/2023]
Abstract
In this review, we summarize recent progress in the application of synchrotron-based spectroscopic techniques for nucleic acid research that takes advantage of high-flux and high-brilliance electromagnetic radiation from synchrotron sources. The first section of the review focuses on the characterization of the structure and folding processes of nucleic acids using different types of synchrotron-based spectroscopies, such as X-ray absorption spectroscopy, X-ray emission spectroscopy, X-ray photoelectron spectroscopy, synchrotron radiation circular dichroism, X-ray footprinting and small-angle X-ray scattering. In the second section, the characterization of nucleic acid-based nanostructures, nucleic acid-functionalized nanomaterials and nucleic acid-lipid interactions using these spectroscopic techniques is summarized. Insights gained from these studies are described and future directions of this field are also discussed.
Collapse
Affiliation(s)
- Peiwen Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yang Yu
- Center of Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Claire E. McGhee
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Li Huey Tan
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yi Lu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Center of Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| |
Collapse
|
42
|
Bagus PS, Nelin CJ, Ilton ES. Theoretical modeling of the uranium 4f XPS for U(VI) and U(IV) oxides. J Chem Phys 2014; 139:244704. [PMID: 24387385 DOI: 10.1063/1.4846135] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A rigorous study is presented of the physical processes related to X-Ray photoelectron spectroscopy, XPS, in the 4f level of U oxides, which, as well as being of physical interest in themselves, are representative of XPS in heavy metal oxides. In particular, we present compelling evidence for a new view of the screening of core-holes that extends prior understandings. Our analysis of the screening focuses on the covalent mixing of high lying U and O orbitals as opposed to the, more common, use of orbitals that are nominally pure U or pure O. It is shown that this covalent mixing is quite different for the initial and final, core-hole, configurations and that this difference is directly related to the XPS satellite intensity. Furthermore, we show that the high-lying U d orbitals as well as the U(5f) orbital may both contribute to the core-hole screening, in contrast with previous work that has only considered screening through the U(5f) shell. The role of modifying the U-O interaction by changing the U-O distance has been investigated and an unexpected correlation between U-O distance and XPS satellite intensity has been discovered. The role of flourite and octahedral crystal structures for U(IV) oxides has been examined and relationships established between XPS features and the covalent interactions in the different structures. The physical views of XPS satellites as arising from shake processes or as arising from ligand to metal charge transfers are contrasted; our analysis provides strong support that shake processes give a more fundamental physical understanding than charge transfer. Our theoretical studies are based on rigorous, strictly ab initio determinations of the electronic structure of embedded cluster models of U oxides with formal U(VI) and U(IV) oxidation states. Our results provide a foundation that makes it possible to establish quantitative relationships between features of the XPS spectra and materials properties.
Collapse
Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | - Connie J Nelin
- Consulting and Services, 6008 Maury's Trail, Austin, Texas 78730, USA
| | - Eugene S Ilton
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| |
Collapse
|
43
|
Craigie J, Hammad A, Cooper B, Averbukh V. Rates of exponential decay in systems of discrete energy levels by Stieltjes imaging. J Chem Phys 2014; 141:014105. [DOI: 10.1063/1.4884785] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jacob Craigie
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Ali Hammad
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Bridgette Cooper
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Vitali Averbukh
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| |
Collapse
|
44
|
|
45
|
Deng Y, Gao B, Deng M, Luo Y. A comparative theoretical study on core-hole excitation spectra of azafullerene and its derivatives. J Chem Phys 2014; 140:124304. [DOI: 10.1063/1.4868717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
46
|
Leeuwenburgh J, Cooper B, Averbukh V, Marangos JP, Ivanov M. High-order harmonic generation spectroscopy of correlation-driven electron hole dynamics. PHYSICAL REVIEW LETTERS 2013; 111:123002. [PMID: 24093256 DOI: 10.1103/physrevlett.111.123002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Indexed: 05/12/2023]
Abstract
We show how high-order harmonic generation spectroscopy can be used to follow correlation-driven electron hole dynamics with attosecond time resolution. The technique is applicable both to normal Auger transitions and to electron hole migration processes that do not lead to secondary electron emission. We theoretically simulate the proposed spectroscopy for M(4,5)NN Auger decay in Kr and for correlation-driven inner-valence hole dynamics in trans-butadiene and propanal.
Collapse
|
47
|
Nakano M, Selles P, Lablanquie P, Hikosaka Y, Penent F, Shigemasa E, Ito K, Carniato S. Near-edge x-ray absorption fine structures revealed in core ionization photoelectron spectroscopy. PHYSICAL REVIEW LETTERS 2013; 111:123001. [PMID: 24093255 DOI: 10.1103/physrevlett.111.123001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 06/02/2023]
Abstract
Simultaneous core ionization and core excitation have been observed in the C(2)H(2n) (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K(-2)V) core excited states of the K(-1) molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
Collapse
Affiliation(s)
- M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Tokyo 152855, Japan and Institute of Material Structural Science, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Cooper B, Averbukh V. Single-photon laser-enabled auger spectroscopy for measuring attosecond electron-hole dynamics. PHYSICAL REVIEW LETTERS 2013; 111:083004. [PMID: 24010436 DOI: 10.1103/physrevlett.111.083004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Indexed: 06/02/2023]
Abstract
We propose and simulate a new type of attosecond time-resolved spectroscopy of electron-hole dynamics, applicable particularly to ultrafast hole migration. Attosecond ionization in the inner-valence region is followed by a vacuum ultraviolet probe inducing single-photon laser-enabled Auger decay, a one-photon-two-electron transition filling the inner-valence vacancy. The double ionization probability as a function of the attosecond pump-vacuum ultraviolet probe delay captures efficiently the ultrafast inner-valence hole dynamics. Detailed ab initio calculations are presented for inner-valence hole migration in glycine.
Collapse
Affiliation(s)
- Bridgette Cooper
- Department of Physics, Imperial College London, Prince Consort Road, SW7 2AZ London, United Kingdom
| | | |
Collapse
|
49
|
Schöffler MS, Stuck C, Waitz M, Trinter F, Jahnke T, Lenz U, Jones M, Belkacem A, Landers AL, Pindzola MS, Cocke CL, Colgan J, Kheifets A, Bray I, Schmidt-Böcking H, Dörner R, Weber T. Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption. PHYSICAL REVIEW LETTERS 2013; 111:013003. [PMID: 23862999 DOI: 10.1103/physrevlett.111.013003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Indexed: 06/02/2023]
Abstract
We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago [J. Phys. B 8, 1248 (1975)]. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.
Collapse
Affiliation(s)
- M S Schöffler
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
|