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Acocella A, de Simone M, Evangelista F, Coreno M, Rudolf P, Zerbetto F. Time-dependent quantum simulation of coronene photoemission spectra. Phys Chem Chem Phys 2016; 18:13604-15. [PMID: 27141554 DOI: 10.1039/c5cp06455d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron spectroscopy is usually described by a simple equation that relates the binding energy of the photoemitted electron, Ebinding, its kinetic energy, Ekinetic, the energy of the ionizing photon, Ephoton, and the work function of the spectrometer, ϕ, Ebinding = Ephoton - Ekinetic - ϕ. Behind this equation there is an extremely rich physics, which we describe here using as an example a relatively simple conjugated molecule, namely coronene. The theoretical analysis of valence band and C1s core level photoemission spectra showed that multiple excitations play an important role in determining the intensities of the final spectrum. An explicit, time-evolving model is applied, which is able to count all possible photo-excitations occurring during the photoemission process, showing that they evolve on a short time-scale, of about 10 fs. The method reveals itself to be a valid approach to reproduce photoemission spectra of polycyclic aromatic hydrocarbons (PAHs).
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Affiliation(s)
- Angela Acocella
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, V. F. Selmi 2, I-40126 Bologna, Italy.
| | - Monica de Simone
- CNR-IOM Lab TASC, ss. 14 km 163,5, Basovizza, I-34149 Trieste, Italy
| | - Fabrizio Evangelista
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, NL-9747AG Groningen, The Netherlands
| | - Marcello Coreno
- CNR-ISM, uos Trieste, ss.14 km 163,5 Basovizza, I-34139 Trieste, Italy
| | - Petra Rudolf
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, NL-9747AG Groningen, The Netherlands
| | - Francesco Zerbetto
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, V. F. Selmi 2, I-40126 Bologna, Italy.
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2
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Electron momentum spectroscopy of metal carbonyls: a reinvestigation of the role of nuclear dynamics. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1244-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Danovich D. Green's function methods for calculating ionization potentials, electron affinities, and excitation energies. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2011. [DOI: 10.1002/wcms.38] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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4
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Morini F, Knippenberg S, Deleuze MS, Hajgató B. Quantum Chemical Study of Conformational Fingerprints in the Photoelectron Spectra and (e, 2e) Electron Momentum Distributions of n-Hexane. J Phys Chem A 2010; 114:4400-17. [DOI: 10.1021/jp9116358] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- F. Morini
- Group of Theoretical Chemistry and Molecular Modelling, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - S. Knippenberg
- Group of Theoretical Chemistry and Molecular Modelling, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - M. S. Deleuze
- Group of Theoretical Chemistry and Molecular Modelling, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - B. Hajgató
- Group of Theoretical Chemistry and Molecular Modelling, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
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5
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Huang YR, Hajgató B, Ning CG, Zhang SF, Liu K, Luo ZH, Deng JK, Deleuze MS. Study of the Valence Wave Function of Thiophene with High Resolution Electron Momentum Spectroscopy and Advanced Dyson Orbital Theories. J Phys Chem A 2008; 112:2339-54. [DOI: 10.1021/jp710845n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Y. R. Huang
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - B. Hajgató
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - C. G. Ning
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - S. F. Zhang
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - K. Liu
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - Z. H. Luo
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - J. K. Deng
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - M. S. Deleuze
- Department of Physics and Key Laboratory of Atomic and Molecular NanoSciences of MOE, Tsinghua University, Beijing 100084, P. R. China, and Research Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
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6
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Huang YR, Ning CG, Deng JK, Deleuze MS. Study of the photoelectron and electron momentum spectra of cyclopentene using benchmark Dyson orbital theories. Phys Chem Chem Phys 2008; 10:2374-89. [DOI: 10.1039/b718588j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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7
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Knippenberg S, Huang YR, Hajgató B, François JP, Deng JK, Deleuze MS. Probing molecular conformations in momentum space: The case of n-pentane. J Chem Phys 2007; 127:174306. [DOI: 10.1063/1.2772848] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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8
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Huang YR, Knippenberg S, Hajgató B, François JP, Deng JK, Deleuze MS. Imaging Momentum Orbital Densities of Conformationally Versatile Molecules: A Benchmark Theoretical Study of the Molecular and Electronic Structures of Dimethoxymethane. J Phys Chem A 2007; 111:5879-97. [PMID: 17566995 DOI: 10.1021/jp0719964] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The main purpose of the present work is to predict from benchmark many-body quantum mechanical calculations the results of experimental studies of the valence electronic structure of dimethoxymethane employing electron momentum spectroscopy, and to establish once and for all the guidelines that should systematically be followed in order to reliably interpret the results of such experiments on conformationally versatile molecules. In a first step, accurate calculations of the energy differences between stationary points on the potential energy surface of this molecule are performed using Hartree-Fock (HF) theory and post-HF treatments of improving quality (MP2, MP3, CCSD, CCSD(T), along with basis sets of increasing size. This study focuses on the four conformers of this molecule, namely the trans-trans (TT), trans-gauche (TG), gauche-gauche (G+G+), and gauche-gauche (G+G-) structures, belonging to the C2v, C1, C2, and Cs symmetry point groups, respectively. A focal point analysis supplemented by suited extrapolations to the limit of asymptotically complete basis sets is carried out to determine how the conformational energy differences at 0 K approach the full CI limit. In a second step, statistical thermodynamics accounting for hindered rotations is used to calculate Gibbs free energy corrections to the above energy differences, and to evaluate the abundance of each conformer in the gas phase. It is found that, at room temperature, the G+G+ species accounts for 96% of the conformational mixture characterizing dimethoxymethane. In a third step, the valence one-electron and shake-up ionization spectrum of dimethoxymethane is analyzed according to calculations on the G+G+ conformer alone by means of one-particle Green's function [1p-GF] theory along with the benchmark third-order algebraic diagrammatic construction [ADC(3)] scheme. A complete breakdown of the orbital picture of ionization is noted at electron binding energies above 22 eV. A comparison with available (e,2e) ionization spectra enables us to identify specific fingerprints of through-space orbital interactions associated with the anomeric effect. At last, based on our 1p-GF/ADC(3) assignment of spectral bands, accurate and spherically averaged (e,2e) electron momentum distributions at an electron impact energy of 1200 eV are computed from the related Dyson orbitals. Very significant discrepancies are observed with momentum distributions obtained for several outer-valence levels using standard Kohn-Sham orbitals.
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Affiliation(s)
- Y R Huang
- Research group of Theoretical Chemistry, Department SBG, University of Hasselt, Agoralaan, Gebouw D, B3590 Diepenbeek, Belgium
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9
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Knippenberg S, Deleuze MS, Cleij TJ, François JP, Cederbaum LS, Eland JHD. The band 12 issue in the electron momentum spectra of norbornane: a comparison with additional Green's Function calculations and ultraviolet photoemission measurements. J Phys Chem A 2007; 109:4267-73. [PMID: 16833755 DOI: 10.1021/jp044130w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In continuation of a recent study of the electronic structure of norbornane [J. Chem. Phys., 2004, 121, 10525] by means of electron momentum spectroscopy (EMS), we present Green's Function calculations of the ionization spectrum of this compound at the ADC(3) level using basis sets of varying quality, along with accurate evaluations at the CCSD(T) level of the vertical (26.5 eV) and adiabatic (22.1 eV) double ionization thresholds under C(2v) symmetry. The obtained results are compared with newly recorded ultraviolet photoemission spectra (UPS), up to binding energies of 40 eV. The theoretical predictions are entirely consistent with experiment and indicate that, in a vertical depiction of ionization, shake-up states at binding energies larger than approximately 26.5 eV tend to decay via emission of a second electron in the continuum. A band of s-type symmetry that has been previously seen at approximately 25 eV in the electron impact ionization spectra of norbornane is entirely missing in the UPS measurements and theoretical ADC(3) spectra. With regard to these results and to the time scales characterizing electron-electron interactions in EMS (10(-17) s) as compared with that (10(-13) s) of photon-electron interactions in UPS, and considering the p-type symmetry of the electron momentum distributions for the nearest 1b(1) and 1b(2) orbitals, this additional band can certainly not be due to adiabatic double ionization processes starting from the ground electronic state of norbornane, or to exceptionally strong vibronic coupling interactions between cationic states derived from ionization of the latter orbitals. It is therefore tentatively ascribed to autoionization processes via electronically excited and possibly dissociating states.
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Affiliation(s)
- S Knippenberg
- Departement SBG, Limburgs Universitair Centrum, Gebouw D, B-3590 Diepenbeek, Belgium
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10
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Knippenberg S, François JP, Deleuze MS. Green's function study of the one-electron and shake-up ionization spectra of unsaturated hydrocarbon cage compounds. J Comput Chem 2006; 27:1703-22. [PMID: 16903000 DOI: 10.1002/jcc.20461] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The valence one-electron and shake-up ionization spectra of stella-2,6-diene, stella-2,6-dione, bicyclo-[2.2.2]-octane-2,5-dione, and bicyclo-[2.2.1]-heptane-2,5-dione have been exhaustively studied, up to the double ionization threshold and beyond, by means of one-particle Green's function theory. This study is based on calculations employing the outer-valence Green's function and the third-order algebraic diagrammatic construction schemes, along with a variety of basis sets. A comparison is made with available ultraviolet (He I) photoelectron and (e, 2e) electron-impact ionization spectra, with main focus on the identification of spectral fingerprints for cyclic strains and through-bond pi-conjugation. As a byproduct, our results demonstrate that it is impossible to reliably assign complex (e, 2e) ionization spectra by resorting only to Hartree-Fock or Kohn-Sham orbital energies and to the related electron momentum distributions.
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Affiliation(s)
- S Knippenberg
- Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
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11
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Buth C. Quasiparticle band structure of infinite hydrogen fluoride and hydrogen chloride chains. J Chem Phys 2006; 125:154707. [PMID: 17059283 DOI: 10.1063/1.2357929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the quasiparticle band structure of isolated, infinite (HF)(infinity) and (HCl)(infinity) bent (zigzag) chains and examine the effect of the crystal field on the energy levels of the constituent monomers. The chains are one of the simplest but realistic models of the corresponding three-dimensional crystalline solids. To describe the isolated monomers and the chains, we set out from the Hartree-Fock approximation, harnessing the advanced Green's function methods local molecular orbital algebraic diagrammatic construction (ADC) scheme and local crystal orbital ADC (CO-ADC) in a strict second order approximation, ADC(2,2) and CO-ADC(2,2), respectively, to account for electron correlations. The configuration space of the periodic correlation calculations is found to converge rapidly only requiring nearest-neighbor contributions to be regarded. Although electron correlations cause a pronounced shift of the quasiparticle band structure of the chains with respect to the Hartree-Fock result, the bandwidth essentially remains unaltered in contrast to, e.g., covalently bound compounds.
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Affiliation(s)
- Christian Buth
- Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany.
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12
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Deleuze MS. Valence one-electron and shake-up ionisation bands of polycyclic aromatic hydrocarbons. IV. The dibenzanthracene species. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2006.06.037] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Knippenberg S, Nixon KL, Mackenzie-Ross H, Brunger MJ, Wang F, Deleuze MS, François JP, Winkler DA. Investigation into the Valence Electronic Structure of Norbornene Using Electron Momentum Spectroscopy, Green's Function, and Density Functional Theories. J Phys Chem A 2005; 109:9324-40. [PMID: 16833274 DOI: 10.1021/jp058158z] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Results of a study of the valence electronic structure of norbornene (C(7)H(10)), up to binding energies of 30 eV, are reported. Experimental electron momentum spectroscopy (EMS) and theoretical Green's function and density functional theory approaches were utilized in this investigation. A stringent comparison between the electron momentum spectroscopy and theoretical orbital momentum distributions found that, among the tested models, the combination of the Becke-Perdew functional and a polarized valence basis set of triple-zeta quality provides the best representation of the electron momentum distributions for all 19 valence orbitals of norbornene. This experimentally validated model was then used to extract other molecular properties of norbornene (geometry, infrared spectrum). When these calculated properties are compared to corresponding results from independent measurements, reasonable agreement is typically found. Due to the improved energy resolution, EMS is now at a stage to very finely image the effective topology of molecular orbitals at varying distances from the molecular center, and the way the individual atomic components interact with each other, often in excellent agreement with theory. This will be demonstrated here. Green's Function calculations employing the third-order algebraic diagrammatic construction scheme indicate that the orbital picture of ionization breaks down at binding energies larger than about 22 eV. Despite this complication, they enable insights within 0.2 eV accuracy into the available ultraviolet emission and newly presented (e,2e) ionization spectra. Finally, limitations inherent to calculations of momentum distributions based on Kohn-Sham orbitals and employing the vertical depiction of ionization processes are emphasized, in a formal discussion of EMS cross sections employing Dyson orbitals.
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Affiliation(s)
- S Knippenberg
- Group of Theoretical Chemistry, Department SBG, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
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Knippenberg S, Nixon KL, Brunger MJ, Maddern T, Campbell L, Trout N, Wang F, Newell WR, Deleuze MS, Francois JP, Winkler DA. Norbornane: An investigation into its valence electronic structure using electron momentum spectroscopy, and density functional and Green’s function theories. J Chem Phys 2004; 121:10525-41. [PMID: 15549936 DOI: 10.1063/1.1799014] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We report on the results of an exhaustive study of the valence electronic structure of norbornane (C(7)H(12)), up to binding energies of 29 eV. Experimental electron momentum spectroscopy and theoretical Green's function and density functional theory approaches were all utilized in this investigation. A stringent comparison between the electron momentum spectroscopy and theoretical orbital momentum distributions found that, among all the tested models, the combination of the Becke-Perdew functional and a polarized valence basis set of triple-zeta quality provides the best representation of the electron momentum distributions for all of the 20 valence orbitals of norbornane. This experimentally validated quantum chemistry model was then used to extract some chemically important properties of norbornane. When these calculated properties are compared to corresponding results from other independent measurements, generally good agreement is found. Green's function calculations with the aid of the third-order algebraic diagrammatic construction scheme indicate that the orbital picture of ionization breaks down at binding energies larger than 22.5 eV. Despite this complication, they enable insights within 0.2 eV accuracy into the available ultraviolet photoemission and newly presented (e,2e) ionization spectra, except for the band associated with the 1a(2) (-1) one-hole state, which is probably subject to rather significant vibronic coupling effects, and a band at approximately 25 eV characterized by a momentum distribution of "s-type" symmetry, which Green's function calculations fail to reproduce. We note the vicinity of the vertical double ionization threshold at approximately 26 eV.
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Affiliation(s)
- S Knippenberg
- Department SBG, Limburgs Universitair Centrum, Gebouw D, B-3590 Diepenbeek, Belgium
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16
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Deleuze MS. Valence One-Electron and Shake-Up Ionization Bands of Polycyclic Aromatic Hydrocarbons. III. Coronene, 1.2,6.7-Dibenzopyrene, 1.12-Benzoperylene, Anthanthrene. J Phys Chem A 2004. [DOI: 10.1021/jp047224e] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael S. Deleuze
- Departement SBG, Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium
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17
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Ono M, Morikawa E. Ultraviolet Photoelectron Spectroscopy Study of Synchrotron Radiation-Degraded Polyethylene Ultrathin Films. J Phys Chem B 2004. [DOI: 10.1021/jp030509r] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masaki Ono
- J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Highway, Baton Rouge, Louisiana 70806
| | - Eizi Morikawa
- J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Highway, Baton Rouge, Louisiana 70806
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18
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Müller IB, Zobeley J, Cederbaum LS. Comparison of electronic decay of valence ionized fluorinated carbanions and their acids. J Chem Phys 2002. [DOI: 10.1063/1.1484388] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Deleuze MS, Giuffreda MG, François JP. Valence One-Electron and Shake-Up Ionization Bands of Carbon Clusters. III. The Cn (n = 5,7,9,11) Rings. J Phys Chem A 2002. [DOI: 10.1021/jp014260u] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. S. Deleuze
- Limburgs Universitair Centrum, Institute for Materials Science (IMO), Departement SBG, Universitaire Campus, B-3590 Diepenbeek, Belgium
| | - M. G. Giuffreda
- Limburgs Universitair Centrum, Institute for Materials Science (IMO), Departement SBG, Universitaire Campus, B-3590 Diepenbeek, Belgium
| | - J.-P. François
- Limburgs Universitair Centrum, Institute for Materials Science (IMO), Departement SBG, Universitaire Campus, B-3590 Diepenbeek, Belgium
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20
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Deleuze MS, Trofimov AB, Cederbaum LS. Valence one-electron and shake-up ionization bands of polycyclic aromatic hydrocarbons. I. Benzene, naphthalene, anthracene, naphthacene, and pentacene. J Chem Phys 2001. [DOI: 10.1063/1.1386414] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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21
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Potts A, Trofimov A, Schirmer J, Holland D, Karlsson L. An experimental and theoretical study of the valence shell photoelectron spectra of 2-bromothiophene and 3-bromothiophene. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00451-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Deleuze MS, Delhalle J. Outer-Valence Green's Function Study of Cycloalkane and Cycloalkyl−Alkane Compounds. J Phys Chem A 2001. [DOI: 10.1021/jp004406+] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Deleuze MS, Pang WN, Salam A, Shang RC. Probing molecular conformations with electron momentum spectroscopy: the case of n-butane. J Am Chem Soc 2001; 123:4049-61. [PMID: 11457156 DOI: 10.1021/ja0039886] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-resolution (e,2e) measurements of the valence electronic structure and momentum-space electron density distributions of n-butane have been exhaustively reanalyzed in order to cope with the presence of two stable structures in the gas phase, namely the all-staggered and gauche conformers. The measurements are compared to a series of Boltzmann-weighted simulations based on the momentum-space form of Kohn-Sham (B3LYP) orbital densities, and to ionization spectra obtained from high-level [ADC(3)] one-particle Green's Function calculations. Indubitable improvements in the quality of the simulated (e,2e) ionization spectra and electron momentum profiles are seen when the contributions of the gauche form of n-butane are included. Both the one-electron binding energies and momentum distributions consistently image the distortions and topological changes that molecular orbitals undergo due to torsion of the carbon backbone, and thereby exhibit variations which can be traced experimentally. With regard to the intimate relation of (e,2e) cross sections with orbital densities, electron momentum spectroscopy can therefore be viewed as a very powerful, but up to now largely unexploited, conformational probe. The study also emphasizes the influence of thermal agitation in photoionization experiments of all kind.
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Affiliation(s)
- M S Deleuze
- Departement SBG, Limburgs Universitair Centrum, Universitaire Campus, B3590 Diepenbeek, Belgium.
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24
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Santra R, Zobeley J, Cederbaum LS. Inner-valence ionization of molecular anions and ultrafast relaxation by electron emission. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00681-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Santra R, Breidbach J, Zobeley J, Cederbaum LS. Parallel filter diagonalization: A novel method to resolve quantum states in dense spectral regions. J Chem Phys 2000. [DOI: 10.1063/1.481545] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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26
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Pang WN, Gao JF, Ruan CJ, Shang RC, Trofimov AB, Deleuze MS. Valence electron momentum spectroscopy of n-butane. J Chem Phys 2000. [DOI: 10.1063/1.481403] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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27
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Deleuze MS, Giuffreda MG, François JP, Cederbaum LS. Valence one-electron and shake-up ionization bands of carbon clusters. II. The Cn (n=4,6,8,10) rings. J Chem Phys 2000. [DOI: 10.1063/1.481125] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Deleuze MS, Giuffreda MG, François JP, Cederbaum LS. Ionization Bands and Electron Affinities of Mixed Boron−Nitrogen BnNn Clusters (n = 3,4,5). J Phys Chem A 2000. [DOI: 10.1021/jp993232x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. S. Deleuze
- Instituut voor MateriaalOnderzoek (IMO), Departement SBG, Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium
| | - M. G. Giuffreda
- Instituut voor MateriaalOnderzoek (IMO), Departement SBG, Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium
| | - J.-P. François
- Instituut voor MateriaalOnderzoek (IMO), Departement SBG, Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium
| | - L. S. Cederbaum
- Lehrstuhl für Theoretische Chemie, Institut für Physikalische Chemie, Universität Heidelberg, D69120 Heidelberg, Germany
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Zobeley J, Cederbaum LS, Tarantelli F. Intermolecular Coulombic Decay of Molecular Clusters: Identification of the Decay Mechanism Using a New Hole-Population Analysis. J Phys Chem A 1999. [DOI: 10.1021/jp992677i] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Deleuze MS, Giuffreda MG, François JP, Cederbaum LS. Valence one-electron and shake-up ionization bands of carbon clusters. I. The Cn (n=3,5,7,9) chains. J Chem Phys 1999. [DOI: 10.1063/1.479880] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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