1
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Dickson LE, Cranston RR, Xu H, Swaraj S, Seferos DS, Lessard BH. Blade Coating Poly(3-hexylthiophene): The Importance of Molecular Weight on Thin-Film Microstructures. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55109-55118. [PMID: 37963182 DOI: 10.1021/acsami.3c12335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Poly(3-hexylthiophene) is one of the most prevalent and promising conjugated polymers for use in organic electronics. However, the deposition of this material in thin films is highly dependent on the process, such as blade coating versus spin coating and material properties such as molecular weight. Typically, large polymer dispersity makes it difficult to isolate the effect of molecular weight without considering a distribution. In this study, we characterize oligothiophenes of exactly 8, 11, and 14 repeat units, which were deposited into thin films by varying blade coating conditions and postdeposition annealing. From synchrotron-based grazing incidence wide-angle X-ray scattering (GIWAXS), scanning transmission X-ray microscopy (STXM) and near-edge X-ray absorption fine structure spectroscopy (NEXAFS), Raman microscopy, optical microscopy, and X-ray diffraction (XRD), it was suggested that higher molecular weight polymers exhibit a fast-forming crystalline polymorph (form-1) while low molecular weight polymers exhibit a slow forming polymorph (form-2) with large domain boundaries. As molecular weight is gradually increased, the polymorph formed transitions from form-1 and form-2, where 11 repeat unit oligomers display both polymorphs. We also found that processing conditions can increase the formation of the form-2 polymorph. We also report improved organic thin film transistor (OTFT) performance when form-1 is present. Overall, oligothiophene polymorph formation is highly dependent on the molecular weight and processing conditions, providing critical insight into the importance of polymer weight control in the development of thin-film electronics based on conjugated polymers.
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Affiliation(s)
- Laura E Dickson
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada
| | - Rosemary R Cranston
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada
| | - Hao Xu
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Sufal Swaraj
- L'Orme des Merisiers, Départementale 128, SOLEIL Synchrotron, Saint-Aubin 91190, France
| | - Dwight S Seferos
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Benoît H Lessard
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave., Ottawa, Ontario K1N 6N5, Canada
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2
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Huang K, Cai X, Li H, Ge ZY, Hou R, Li H, Liu T, Shi Y, Chen C, Zheng D, Xu K, Liu ZB, Li Z, Fan H, Fang WH. Variational Quantum Computation of Molecular Linear Response Properties on a Superconducting Quantum Processor. J Phys Chem Lett 2022; 13:9114-9121. [PMID: 36154018 DOI: 10.1021/acs.jpclett.2c02381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Simulating response properties of molecules is crucial for interpreting experimental spectroscopies and accelerating materials design. However, it remains a long-standing computational challenge for electronic structure methods on classical computers. While quantum computers hold the promise of solving this problem more efficiently in the long run, existing quantum algorithms requiring deep quantum circuits are infeasible for near-term noisy quantum processors. Herein, we introduce a pragmatic variational quantum response (VQR) algorithm for response properties, which circumvents the need for deep quantum circuits. Using this algorithm, we report the first simulation of linear response properties of molecules including dynamic polarizabilities and absorption spectra on a superconducting quantum processor. Our results indicate that a large class of important dynamical properties, such as Green's functions, are within the reach of near-term quantum hardware using this algorithm in combination with suitable error mitigation techniques.
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Affiliation(s)
- Kaixuan Huang
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaoxia Cai
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Hao Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physics, Northwest University, Xi'an 710127, China
| | - Zi-Yong Ge
- Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research, Wako-shi, Saitama 351-0198, Japan
| | - Ruijuan Hou
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Hekang Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Tong Liu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yunhao Shi
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Chitong Chen
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Dongning Zheng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Kai Xu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Zhi-Bo Liu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China
| | - Zhendong Li
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Heng Fan
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education College of Chemistry, Beijing Normal University, Beijing 100875, China
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3
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Zhang C, Shahcheraghi L, Ismail F, Eraky H, Yuan H, Hitchcock AP, Higgins D. Chemical Structure and Distribution in Nickel–Nitrogen–Carbon Catalysts for CO 2 Electroreduction Identified by Scanning Transmission X-ray Microscopy. ACS Catal 2022; 12:8746-8760. [DOI: 10.1021/acscatal.2c01255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chunyang Zhang
- Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1
- Chemistry & Chemical Biology, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Ladan Shahcheraghi
- Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Fatma Ismail
- Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Haytham Eraky
- Chemistry & Chemical Biology, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Hao Yuan
- Chemistry & Chemical Biology, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Adam P. Hitchcock
- Chemistry & Chemical Biology, McMaster University, Hamilton, Ontario, Canada L8S 4M1
| | - Drew Higgins
- Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1
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4
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Yao Y, Golze D, Rinke P, Blum V, Kanai Y. All-Electron BSE@ GW Method for K-Edge Core Electron Excitation Energies. J Chem Theory Comput 2022; 18:1569-1583. [PMID: 35138865 DOI: 10.1021/acs.jctc.1c01180] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We present an accurate computational approach to calculate absolute K-edge core electron excitation energies as measured by X-ray absorption spectroscopy. Our approach employs an all-electron Bethe-Salpeter equation (BSE) formalism based on GW quasiparticle energies (BSE@GW) using numeric atom-centered orbitals (NAOs). The BSE@GW method has become an increasingly popular method for the computation of neutral valence excitation energies of molecules. However, it was so far not applied to molecular K-edge excitation energies. We discuss the influence of different numerical approximations on the BSE@GW calculation and employ in our final setup (i) exact numeric algorithms for the frequency integration of the GW self-energy, (ii) G0W0 and BSE starting points with ∼50% of exact exchange, (iii) the Tamm-Dancoff approximation and (iv) relativistic corrections. We study the basis set dependence and convergence with common Gaussian-type orbital and NAO basis sets. We identify the importance of additional spatially confined basis functions as well as of diffuse augmenting basis functions. The accuracy of our BSE@GW method is assessed for a benchmark set of small organic molecules, previously used for benchmarking the equation-of-motion coupled cluster method [Peng et al., J. Chem. Theory Comput., 2015, 11, 4146], as well as the medium-sized dibenzothiophene (DBT) molecule. Our BSE@GW results for absolute excitation energies are in excellent agreement with the experiment, with a mean average error of only 0.63 eV for the benchmark set and with errors <1 eV for the DBT molecule.
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Affiliation(s)
- Yi Yao
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Dorothea Golze
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany.,Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| | - Patrick Rinke
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| | | | - Yosuke Kanai
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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5
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Huang M, Li C, Evangelista FA. Theoretical Calculation of Core-Excited States along Dissociative Pathways beyond Second-Order Perturbation Theory. J Chem Theory Comput 2021; 18:219-233. [PMID: 34964628 DOI: 10.1021/acs.jctc.1c00884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We extend the multireference driven similarity renormalization (MR-DSRG) method to compute core-excited states by combining it with a GASSCF treatment of orbital relaxation and static electron correlation effects. We consider MR-DSRG treatments of dynamical correlation truncated at the level of perturbation theory (DSRG-MRPT2/3) and iterative linearized approximations with one- and two-body operators [MR-LDSRG(2)] in combination with a spin-free exact-two-component (X2C) one-electron treatment of scalar relativistic effects. This approach is calibrated and tested on a series of 16 core-excited states of five closed- and open-shell diatomic molecules containing first-row elements (C, N, and O). All GASSCF-MR-DSRG theories show excellent agreement with experimental adiabatic transitions energies, with mean absolute errors ranging between 0.17 and 0.35 eV, even for the challenging partially doubly excited states of the N2+ molecule. The vibrational structure of all these transitions, obtained from using a full potential energy scan, shows a mean absolute error as low as 25 meV for DSRG-MRPT2 and 12/13 meV for DSRG-MRPT3 and MR-LDSRG(2). We generally find that a treatment of dynamical correlation that goes beyond the second-order level in perturbation theory improves the accuracy of the potential energy surface, especially in the bond-dissociation region.
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Affiliation(s)
- Meng Huang
- Department of Chemistry and Cherry Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Chenyang Li
- Department of Chemistry and Cherry Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States.,Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Francesco A Evangelista
- Department of Chemistry and Cherry Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
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6
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Analysis of Cr(VI) Bioremediation by Citrobacter freundii Using Synchrotron Soft X-ray Scanning Transmission X-ray Microscopy. QUANTUM BEAM SCIENCE 2021. [DOI: 10.3390/qubs5040028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Scanning transmission X-ray microscopy (STXM) was utilized for analysing the bioremediation of Cr(VI) by Citrobacter freundii, a species of gram-negative bacteria. The biosorption and bioreduction processes were analysed by the chemical mapping of cells biosorbed at different concentrations of Cr(VI). STXM spectromicroscopy images were recorded at O K-edge and Cr L-edge. A thorough analysis of the X-ray absorption features corresponding to different oxidation states of Cr in the biosorbed cell indicated the coexistence of Cr(III) and Cr(VI) at higher concentrations. This signifies the presence of partially reduced Cr(VI) in addition to biosorbed Cr(VI). In addition, the Cr(III) signal is intense compared with Cr(VI) at different regions of the cell indicating excess of reduced Cr. Speciation of adsorbed Cr was analysed for the spectral features of biosorbed cell and comparison with Cr standards. Analysis of absorption onset, L3/L2 ratio and absorption fine structure concludes that adsorbed Cr is predominantly present as Cr(III) hydroxide or oxyhydroxide. The evolution of absorption features in the duration of biosorption process was also studied. These time lapse studies depict the gradual decrement in Cr(VI) signal as biosorption proceeds. A strong evidence of interaction of Cr with the cell material was also observed. The obtained results provide insights into the biosorption process and chemical speciation of Cr on the cells.
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7
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Zuhaib A, Urquhart SG. Internal molecular conformation of organic glasses: A NEXAFS study. J Chem Phys 2021; 155:034503. [PMID: 34293907 DOI: 10.1063/5.0054442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The origin of the exceptional stability of molecular glasses grown by physical vapor deposition (PVD) is not well understood. Differences in glass density have been correlated with thermodynamic stability for thin films of N,N'-Bis(3-methylphenyl)-N,N'-diphenylbenzidine (TPD) grown by PVD at specific substrate temperatures below the glass transition temperature. However, the relationship between the internal conformation of glass molecules and the thermodynamic properties of molecular glasses is not well studied. We use carbon 1s near edge x-ray absorption fine structure (NEXAFS) spectroscopy to examine different TPD sample preparations in which differences in the thermodynamic stability of the glass are known. Density functional theory simulations of the NEXAFS spectra of TPD allow us to attribute spectroscopic differences to changes in the internal conformation of the TPD molecule and relate this conformation to the stability of the TPD glass. This provides a direct experimental measurement of the internal conformation of molecules forming an organic glass.
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Affiliation(s)
- Amara Zuhaib
- Department of Chemistry, University of Saskatchewan, Treaty Six Territory, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Stephen G Urquhart
- Department of Chemistry, University of Saskatchewan, Treaty Six Territory, Saskatoon, Saskatchewan S7N 5C9, Canada
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8
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Berejnov V, Rubinstein B, Melo LGA, Hitchcock AP. Calculating absorption dose when X-ray irradiation modifies material quantity and chemistry. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:834-848. [PMID: 33949991 DOI: 10.1107/s1600577521001703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 02/11/2021] [Indexed: 06/12/2023]
Abstract
X-ray absorption is a sensitive and versatile tool for chemical speciation. However, when high doses are used, the absorbed energy can change the composition, amount and structure of the native material, thereby changing the aspects of the absorption process on which speciation is based. How can one calculate the dose when X-ray irradiation affects the chemistry and changes the amount of the material? This paper presents an assumption-free approach which can retrieve from the experimental data all dose-sensitive parameters - absorption coefficients, composition (elemental molecular units), material densities - which can then be used to calculate accurate doses as a function of irradiation. This approach is illustrated using X-ray damage to a solid film of a perfluorosulfonic acid fluoropolymer in a scanning transmission soft X-ray microscope. This new approach is compared against existing dose models which calculate the dose by making simplifying assumptions regarding the material quantity, density and chemistry. While the detailed measurements used in this approach go beyond typical methods to experimental analytical X-ray absorption, they provide a more accurate quantitation of radiation dose, and help to understand mechanisms of radiation damage.
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Affiliation(s)
- Viatcheslav Berejnov
- Analytical Laboratory, FTXT Energy Technology Co. Ltd, 2199 Chaoyang Street, Baoding, Hebei 071000, People's Republic of China
| | - Boris Rubinstein
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA
| | - Lis G A Melo
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada L8S 4M1
| | - Adam P Hitchcock
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada L8S 4M1
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9
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Moitra T, Madsen D, Christiansen O, Coriani S. Vibrationally resolved coupled-cluster x-ray absorption spectra from vibrational configuration interaction anharmonic calculations. J Chem Phys 2020; 153:234111. [DOI: 10.1063/5.0030202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Torsha Moitra
- DTU Chemistry—Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, DK-2800 Kongens Lyngby, Denmark
| | - Diana Madsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Ove Christiansen
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Sonia Coriani
- DTU Chemistry—Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, DK-2800 Kongens Lyngby, Denmark
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10
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Effect of chain length on the near edge X-ray absorption fine structure spectra of liquid n-Alkanes. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Kehry M, Franzke YJ, Holzer C, Klopper W. Quasirelativistic two-component core excitations and polarisabilities from a damped-response formulation of the Bethe–Salpeter equation. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1755064] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Max Kehry
- Theoretical Chemistry Group, Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Yannick J. Franzke
- Theoretical Chemistry Group, Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Christof Holzer
- Theoretical Chemistry Group, Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Wim Klopper
- Theoretical Chemistry Group, Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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12
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Grell G, Bokarev SI. Multi-reference protocol for (auto)ionization spectra: Application to molecules. J Chem Phys 2020; 152:074108. [DOI: 10.1063/1.5142251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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
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13
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Vidal ML, Feng X, Epifanovsky E, Krylov AI, Coriani S. New and Efficient Equation-of-Motion Coupled-Cluster Framework for Core-Excited and Core-Ionized States. J Chem Theory Comput 2019; 15:3117-3133. [PMID: 30964297 DOI: 10.1021/acs.jctc.9b00039] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We present a fully analytical implementation of the core-valence separation (CVS) scheme for the equation-of-motion (EOM) coupled-cluster singles and doubles (CCSD) method for calculations of core-level states. Inspired by the CVS idea as originally formulated by Cederbaum, Domcke, and Schirmer, pure valence excitations are excluded from the EOM target space and the frozen-core approximation is imposed on the reference-state amplitudes and multipliers. This yields an efficient, robust, practical, and numerically balanced EOM-CCSD framework for calculations of excitation and ionization energies as well as state and transition properties (e.g., spectral intensities, natural transition, and Dyson orbitals) from both the ground and excited states. The errors in absolute excitation/ionization energies relative to the experimental reference data are on the order of 0.2-3.0 eV, depending on the K-edge considered and on the basis set used, and the shifts are systematic for each edge. Compared to a previously proposed CVS scheme where CVS was applied as a posteriori projection only during the solution of the EOM eigenvalue equations, the new scheme is computationally cheaper. It also achieves better cancellation of errors, yielding similar spectral profiles but with absolute core excitation and ionization energies that are systematically closer to the corresponding experimental data. Among the presented results are calculations of transient-state X-ray absorption spectra, relevant for interpretation of UV-pump/X-ray probe experiments.
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Affiliation(s)
- Marta L Vidal
- DTU Chemistry, Department of Chemistry , Technical University of Denmark , Kongens Lyngby DK-2800 , Denmark
| | - Xintian Feng
- Department of Chemistry , University of California , Berkeley , California 94720 , United States.,Q-Chem Incorporated , 6601 Owens Drive, Suite 105 , Pleasanton , California 94588 , United States
| | - Evgeny Epifanovsky
- Q-Chem Incorporated , 6601 Owens Drive, Suite 105 , Pleasanton , California 94588 , United States
| | - Anna I Krylov
- Department of Chemistry , University of Southern California , Los Angeles , California 90089-0482 , United States
| | - Sonia Coriani
- DTU Chemistry, Department of Chemistry , Technical University of Denmark , Kongens Lyngby DK-2800 , Denmark
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14
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Peng R, Copan AV, Sokolov AY. Simulating X-ray Absorption Spectra with Linear-Response Density Cumulant Theory. J Phys Chem A 2019; 123:1840-1850. [DOI: 10.1021/acs.jpca.8b12259] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruojing Peng
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andreas V. Copan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Alexander Yu. Sokolov
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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15
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Perera SD, Shokatian S, Wang J, Urquhart SG. Temperature Dependence in the NEXAFS Spectra of n-Alkanes. J Phys Chem A 2018; 122:9512-9517. [DOI: 10.1021/acs.jpca.8b10713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sahan D. Perera
- Department of Chemistry, University of Saskatchewan, Saskatoon, Treaty Six Territory, Saskatchewan S7N 5C9, Canada
| | - Sadegh Shokatian
- Department of Chemistry, University of Saskatchewan, Saskatoon, Treaty Six Territory, Saskatchewan S7N 5C9, Canada
| | - Jian Wang
- Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0X4, Canada
| | - Stephen G. Urquhart
- Department of Chemistry, University of Saskatchewan, Saskatoon, Treaty Six Territory, Saskatchewan S7N 5C9, Canada
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16
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Holzmeier F, Wolf TJA, Gienger C, Wagner I, Bozek J, Nandi S, Nicolas C, Fischer I, Gühr M, Fink RF. Normal and resonant Auger spectroscopy of isocyanic acid, HNCO. J Chem Phys 2018; 149:034308. [DOI: 10.1063/1.5030621] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Holzmeier
- Institut des Sciences Moléculaire d’Orsay (CNRS), Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - T. J. A. Wolf
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C. Gienger
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | - I. Wagner
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - J. Bozek
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - S. Nandi
- Department of Physics, Lund University, 221 00 Lund, Sweden
| | - C. Nicolas
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - I. Fischer
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - M. Gühr
- Institut für Physik und Astronomie Universität Potsdam, 14476 Potsdam, Germany
| | - R. F. Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
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17
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Brykalova XO, Pavlychev AA. Spectral Distribution of Oscillator Strength for Core-to-Valence Transitions probed by using X-ray Absorption and Total Electron Yield Modes. Z PHYS CHEM 2018. [DOI: 10.1515/zpch-2017-1057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Changes in spectral distribution of oscillator strength for core-to-valence transitions probed by X-ray absorption and total electron yield (TEY) modes are studied in more detail. The quantitative analysis of their redistribution in TEY due to the saturation effect is performed by applying the model
M
˜
$\tilde M$
-function method suggested by Flesch et al. J. Chem. Phys. 138 (2013) 144302. The model
M
˜
$\tilde M$
-function method is generalized to account for the saturation-induced distortion of the line shape of the transitions embedded into the core ionization continua and located below them. It is shown that TEY measurements produce essential changes not only in the relative intensity of the transitions but also shift upward the transition energy, broaden the Lorentzian and Gaussian widths and enhance the line asymmetry. The Gaussian width of the TEY signal undergoes the most substantial broadening though the Lorentzian width increases significantly too. The saturation-induced distortion of the line shapes is not negligible even if the well-known escape-to-penetration condition is valid.
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Affiliation(s)
- Xenia O. Brykalova
- Institute of Physics , St. Petersburg State University , St. Petersburg 198504 , Russia
| | - Andrey A. Pavlychev
- Institute of Physics , St. Petersburg State University , St. Petersburg 198504 , Russia
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18
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Heenemann M, Heine C, Hävecker M, Trunschke A, Schlögl R. Influence of Steam on a Vanadyl Pyrophosphate Catalyst During Propane Oxidation. J Phys Chem B 2017; 122:695-704. [DOI: 10.1021/acs.jpcb.7b06314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Heenemann
- Department
of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Christian Heine
- Department
of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Michael Hävecker
- Department
Heterogeneous Reactions, Max-Planck-Institut für Chemische Energiekonversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Annette Trunschke
- Department
of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Robert Schlögl
- Department
of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Department
Heterogeneous Reactions, Max-Planck-Institut für Chemische Energiekonversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
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19
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Perera SD, Urquhart SG. Systematic Investigation of π–π Interactions in Near-Edge X-ray Fine Structure (NEXAFS) Spectroscopy of Paracyclophanes. J Phys Chem A 2017; 121:4907-4913. [DOI: 10.1021/acs.jpca.7b03823] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sahan D. Perera
- Department of Chemistry, University of Saskatchewan, Treaty Six
Territory, Saskatoon, Saskatchewan, Canada S7N 5C9
| | - Stephen G. Urquhart
- Department of Chemistry, University of Saskatchewan, Treaty Six
Territory, Saskatoon, Saskatchewan, Canada S7N 5C9
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20
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West JD, Zhu Y, Saem S, Moran-Mirabal J, Hitchcock AP. X-ray Absorption Spectroscopy and Spectromicroscopy of Supported Lipid Bilayers. J Phys Chem B 2017; 121:4492-4501. [DOI: 10.1021/acs.jpcb.7b02646] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jonathan D. West
- Department of Chemistry and
Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Yujie Zhu
- Department of Chemistry and
Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Sokunthearath Saem
- Department of Chemistry and
Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Jose Moran-Mirabal
- Department of Chemistry and
Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Adam P. Hitchcock
- Department of Chemistry and
Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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21
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Püttner R, Ueda K. The angularly resolved O 1sion-yield spectrum of O2revisited. J Chem Phys 2016; 145:224302. [DOI: 10.1063/1.4971240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R. Püttner
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
| | - K. Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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22
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Peng B, Lestrange PJ, Goings JJ, Caricato M, Li X. Energy-Specific Equation-of-Motion Coupled-Cluster Methods for High-Energy Excited States: Application to K-edge X-ray Absorption Spectroscopy. J Chem Theory Comput 2015; 11:4146-53. [DOI: 10.1021/acs.jctc.5b00459] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Peng
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Patrick J. Lestrange
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Joshua J. Goings
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Marco Caricato
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Xiaosong Li
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
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23
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Karunakaran C, Christensen CR, Gaillard C, Lahlali R, Blair LM, Perumal V, Miller SS, Hitchcock AP. Introduction of soft X-ray spectromicroscopy as an advanced technique for plant biopolymers research. PLoS One 2015; 10:e0122959. [PMID: 25811457 PMCID: PMC4374829 DOI: 10.1371/journal.pone.0122959] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 02/16/2015] [Indexed: 12/02/2022] Open
Abstract
Soft X-ray absorption spectroscopy coupled with nano-scale microscopy has been widely used in material science, environmental science, and physical sciences. In this work, the advantages of soft X-ray absorption spectromicroscopy for plant biopolymer research were demonstrated by determining the chemical sensitivity of the technique to identify common plant biopolymers and to map the distributions of biopolymers in plant samples. The chemical sensitivity of soft X-ray spectroscopy to study biopolymers was determined by recording the spectra of common plant biopolymers using soft X-ray and Fourier Transform mid Infrared (FT-IR) spectroscopy techniques. The soft X-ray spectra of lignin, cellulose, and polygalacturonic acid have distinct spectral features. However, there were no distinct differences between cellulose and hemicellulose spectra. Mid infrared spectra of all biopolymers were unique and there were differences between the spectra of water soluble and insoluble xylans. The advantage of nano-scale spatial resolution exploited using soft X-ray spectromicroscopy for plant biopolymer research was demonstrated by mapping plant cell wall biopolymers in a lentil stem section and compared with the FT-IR spectromicroscopy data from the same sample. The soft X-ray spectromicroscopy enables mapping of biopolymers at the sub-cellular (~30 nm) resolution whereas, the limited spatial resolution in the micron scale range in the FT-IR spectromicroscopy made it difficult to identify the localized distribution of biopolymers. The advantages and limitations of soft X-ray and FT-IR spectromicroscopy techniques for biopolymer research are also discussed.
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Affiliation(s)
- Chithra Karunakaran
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, Canada
- * E-mail:
| | - Colleen R. Christensen
- Industrial Research Assistance Program—National Research Council Canada, 110 Gymnasium Place, Saskatoon, Saskatchewan, Canada
| | - Cedric Gaillard
- INRA—Biopolymers, Interactions, Assemblies Unit (BIA), Nantes, France
| | - Rachid Lahlali
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, Canada
| | - Lisa M. Blair
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, Canada
- Canadian Food Inspection Agency, 116 Veterinary Road, Saskatoon, Saskatchewan, Canada
| | - Vijayan Perumal
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, Canada
| | - Shea S. Miller
- Agriculture and Agri-Food Canada, Eastern Cereal and Oilseed Research Centre, Ottawa, Ontario, Canada
| | - Adam P. Hitchcock
- Brockhouse Institute for Materials Research, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada
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24
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Jones TE, Rocha TCR, Knop-Gericke A, Stampfl C, Schlögl R, Piccinin S. Thermodynamic and spectroscopic properties of oxygen on silver under an oxygen atmosphere. Phys Chem Chem Phys 2015; 17:9288-312. [DOI: 10.1039/c5cp00342c] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Comparing experimental and theoretical XPS and XANES suggest that unreconstructed atomic oxygen is not present on the silver surface at oxygen chemical potentials relevant for epoxidation.
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Affiliation(s)
- Travis E. Jones
- CNR-IOM DEMOCRITOS
- c/o SISSA
- Trieste
- Italy
- Department of Inorganic Chemistry
| | - Tulio C. R. Rocha
- Department of Inorganic Chemistry
- Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Berlin
- Germany
| | - Axel Knop-Gericke
- Department of Inorganic Chemistry
- Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Berlin
- Germany
| | | | - Robert Schlögl
- Department of Inorganic Chemistry
- Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Berlin
- Germany
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25
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Wolff W, Sigaud L, Montenegro EC, de Jesus VLB, Cavasso Filho RL, Pilling S, Santos ACF. Ionization and Fragmentation of Methane Induced by 40 eV to 480 eV Synchrotron Radiation: From Valence to Beyond Core Electron Ionization. J Phys Chem A 2012; 117:56-66. [DOI: 10.1021/jp309187d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W. Wolff
- Instituto de Física, Universidade Federal do Rio de Janeiro, PO 68528, 21941-972 Rio de Janeiro,
RJ, Brazil
| | - L. Sigaud
- Instituto de Física, Universidade Federal do Rio de Janeiro, PO 68528, 21941-972 Rio de Janeiro,
RJ, Brazil
| | - E. C. Montenegro
- Instituto de Física, Universidade Federal do Rio de Janeiro, PO 68528, 21941-972 Rio de Janeiro,
RJ, Brazil
| | - V. L. B. de Jesus
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Campus Nilópolis, R.
Lucio Tavares 1045, 26530-060 Nilópolis, RJ, Brazil
| | - R. L Cavasso Filho
- Universidade Federal do ABC, Rua Catequese 242, 09090-400, Santo André,
SP, Brazil
| | - S. Pilling
- Universidade do Vale do Paraíba, UNIVAP, Av.
Shishima Hifumi 2911, Campus Urbanova, 12244 000, São José
dos Campos, SP, Brazil
| | - A. C. F. Santos
- Instituto de Física, Universidade Federal do Rio de Janeiro, PO 68528, 21941-972 Rio de Janeiro,
RJ, Brazil
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26
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Zhang H, Wang J, Pan X, Hu Y, Bao X. Local structure of titania decorated double-walled carbon nanotube characterized by scanning transmission X-ray microscopy. J Chem Phys 2012; 136:174701. [DOI: 10.1063/1.4706515] [Citation(s) in RCA: 3] [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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27
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Boulard E, Menguy N, Auzende AL, Benzerara K, Bureau H, Antonangeli D, Corgne A, Morard G, Siebert J, Perrillat JP, Guyot F, Fiquet G. Experimental investigation of the stability of Fe-rich carbonates in the lower mantle. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jb008733] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Flesch R, Serdaroglu E, Blobner F, Feulner P, Brykalova XO, Pavlychev AA, Kosugi N, Rühl E. Gas-to-solid shift of C 1s-excited benzene. Phys Chem Chem Phys 2012; 14:9397-402. [DOI: 10.1039/c2cp23451c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Schmidt N, Clark T, Urquhart SG, Fink RH. Electron-vibron coupling in halogenated acenaphthenequinone upon OK-edge soft x-ray absorption. J Chem Phys 2011; 135:144301. [DOI: 10.1063/1.3646732] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Schuster ME, Hävecker M, Arrigo R, Blume R, Knauer M, Ivleva NP, Su DS, Niessner R, Schlögl R. Surface Sensitive Study To Determine the Reactivity of Soot with the Focus on the European Emission Standards IV and VI. J Phys Chem A 2011; 115:2568-80. [DOI: 10.1021/jp1088417] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manfred E. Schuster
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Michael Hävecker
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Rosa Arrigo
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Raoul Blume
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Markus Knauer
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistr. 17, D-81377 Munich, Germany
| | - Natalia P. Ivleva
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistr. 17, D-81377 Munich, Germany
| | - Dang Sheng Su
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Reinhard Niessner
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistr. 17, D-81377 Munich, Germany
| | - Robert Schlögl
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
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31
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Hamilton TD, Bučar DK, Baltrusaitis J, Flanagan DR, Li Y, Ghorai S, Tivanski AV, MacGillivray LR. Thixotropic Hydrogel Derived from a Product of an Organic Solid-State Synthesis: Properties and Densities of Metal−Organic Nanoparticles. J Am Chem Soc 2011; 133:3365-71. [DOI: 10.1021/ja106095w] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tamara D. Hamilton
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Dejan-Krešimir Bučar
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Jonas Baltrusaitis
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Douglas R. Flanagan
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Yingjian Li
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Suman Ghorai
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Alexei V. Tivanski
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Leonard R. MacGillivray
- Department of Chemistry, 305 Chemistry Building, ‡Central Microscopy Research Facility, 76 Eckstein Medical Research Building, and §Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
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32
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Zhou JG, Wang J, Sun CL, Maley JM, Sammynaiken R, Sham TK, Pong WF. Nano-scale chemical imaging of a single sheet of reduced graphene oxide. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11071c] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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TOYOSHIMA A, TANAKA H, KIKUCHI T, AMEMIYA K, MASE K. Present Status of a New Vacuum Ultraviolet and Soft X-Ray Undulator Beamline BL-13A for the Study of Organic Thin Films Adsorbed on Surfaces. ACTA ACUST UNITED AC 2011. [DOI: 10.3131/jvsj2.54.580] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Sakko A, Galambosi S, Inkinen J, Pylkkänen T, Hakala M, Huotari S, Hämäläinen K. Inelastic X-ray scattering and vibrational effects at the K-edges of gaseous N2, N2O, and CO2. Phys Chem Chem Phys 2011; 13:11678-85. [DOI: 10.1039/c1cp20295b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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35
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Ghorai S, Tivanski AV. Hygroscopic Behavior of Individual Submicrometer Particles Studied by X-ray Spectromicroscopy. Anal Chem 2010; 82:9289-98. [DOI: 10.1021/ac101797k] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suman Ghorai
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242-1294, United States
| | - Alexei V. Tivanski
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242-1294, United States
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36
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Hikosaka Y, Kaneyasu T, Matsushita T, Tamenori Y, Shigemasa E. Dissociation of core-valence doubly excited states in NO followed by atomic Auger decay. J Chem Phys 2010; 133:154315. [PMID: 20969394 DOI: 10.1063/1.3505297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The decay processes of core-valence doubly excited states near the N K edge of NO have been studied using electron spectroscopy. Electron yields measured as a function of photon energy and kinetic energy enable the clear identification of atomic Auger lines associated with the dissociation of doubly excited states. The atomic Auger lines exhibit Doppler profiles, allowing the entire reaction scheme of such dissociation processes to be determined.
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Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
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37
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Brandes JA, Wirick S, Jacobsen C. Carbon K-edge spectra of carbonate minerals. JOURNAL OF SYNCHROTRON RADIATION 2010; 17:676-682. [PMID: 20724789 DOI: 10.1107/s0909049510020029] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 05/26/2010] [Indexed: 05/29/2023]
Abstract
Carbon K-edge X-ray spectroscopy has been applied to the study of a wide range of organic samples, from polymers and coals to interstellar dust particles. Identification of carbonaceous materials within these samples is accomplished by the pattern of resonances in the 280-320 eV energy region. Carbonate minerals are often encountered in the study of natural samples, and have been identified by a distinctive resonance at 290.3 eV. Here C K-edge and Ca L-edge spectra from a range of carbonate minerals are presented. Although all carbonates exhibit a sharp 290 eV resonance, both the precise position of this resonance and the positions of other resonances vary among minerals. The relative strengths of the different carbonate resonances also vary with crystal orientation to the linearly polarized X-ray beam. Intriguingly, several carbonate minerals also exhibit a strong 288.6 eV resonance, consistent with the position of a carbonyl resonance rather than carbonate. Calcite and aragonite, although indistinguishable spectrally at the C K-edge, exhibited significantly different spectra at the Ca L-edge. The distinctive spectral fingerprints of carbonates provide an identification tool, allowing for the examination of such processes as carbon sequestration in minerals, Mn substitution in marine calcium carbonates (dolomitization) and serpentinization of basalts.
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Affiliation(s)
- Jay A Brandes
- Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA 31411, USA.
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38
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Laksman J, Céolin D, Gisselbrecht M, Canton SE, Sorensen SL. Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging. J Chem Phys 2009; 131:244305. [DOI: 10.1063/1.3270159] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Complementary effects of multi-protein components on biomineralization in vitro. J Struct Biol 2009; 170:83-92. [PMID: 20035875 DOI: 10.1016/j.jsb.2009.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 12/15/2009] [Accepted: 12/17/2009] [Indexed: 01/05/2023]
Abstract
The extracellular matrix (ECM) is composed of mixed protein fibers whose precise composition affects biomineralization. New methods are needed to probe the interactions of these proteins with calcium phosphate mineral and with each other. Here we follow calcium phosphate mineralization on protein fibers self-assembled in vitro from solutions of fibronectin, elastin and their mixture. We probe the surface morphology and mechanical properties of the protein fibers during the early stages. The development of mineral crystals on the protein matrices is also investigated. In physiological mineralization solution, the elastic modulus of the fibers in the fibronectin-elastin mixture increases to a greater extent than that of the fibers from either pure protein. In the presence of fibronectin, longer exposure in the mineral solution leads to the formation of amorphous calcium phosphate particles templated along the self-assembled fibers, while elastin fibers only collect calcium without any mineral observed during early stage. TEM images confirm that small needle-shape crystals are confined inside elastin fibers which suppress the release of mineral outside the fibers during late stage, while hydroxyapatite crystals form when fibronectin is present. These results demonstrate complementary actions of the two ECM proteins fibronectin and elastin to collect cations and template mineral, respectively.
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40
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Nakata A, Tsuneda T, Hirao K. Modified regional self-interaction corrected time-dependent density functional theory for core excited-state calculations. J Comput Chem 2009; 30:2583-93. [DOI: 10.1002/jcc.21262] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Otero E, Kosugi N, Urquhart SG. Strong double excitation and open-shell features in the near-edge x-ray absorption fine structure spectroscopy of ferrocene and ferrocenium compounds. J Chem Phys 2009; 131:114313. [DOI: 10.1063/1.3230101] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Kimberg V, Kosugi N, Gel’mukhanov F. Theoretical studies of angle-resolved ion yield spectra of core-to-valence transitions of acetylene. J Chem Phys 2009; 130:114302. [DOI: 10.1063/1.3089226] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Besley NA, Peach MJG, Tozer DJ. Time-dependent density functional theory calculations of near-edge X-ray absorption fine structure with short-range corrected functionals. Phys Chem Chem Phys 2009; 11:10350-8. [DOI: 10.1039/b912718f] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Raabe J, Tzvetkov G, Flechsig U, Böge M, Jaggi A, Sarafimov B, Vernooij MGC, Huthwelker T, Ade H, Kilcoyne D, Tyliszczak T, Fink RH, Quitmann C. PolLux: a new facility for soft x-ray spectromicroscopy at the Swiss Light Source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:113704. [PMID: 19045892 DOI: 10.1063/1.3021472] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We report on the successful installation and operation of a scanning transmission x-ray microspectroscope (STXM) at the PolLux facility at the Swiss Light Source. This integration of an advanced STXM with improved sample handling capabilities and a novel beamline provides unique capabilities. PolLux uses linearly or circularly polarized x-rays from a bending magnet with an extended photon energy range (200-1400 eV). It is therefore well suited to determine a sample's quantitative chemical composition, molecular orientation, or thickness of organic as well as condensed matter materials. The local magnetic state of magnetic thin films is accessible through fast helicity switching by steering the electron beam off axis through the bending magnet. Ex vacuo girder movers allow fast and highly reproducible (<1 microm) alignment of the instrument with respect to the photon beam. The present spatial resolution is approximately 20 nm, limited by the zone plates utilized. The instrument has the stability and positional resolution to operate with much higher resolution optics as it becomes available. In addition to characterization experiments, we present several typical examples from materials research and environmental science to exemplify the capabilities.
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Affiliation(s)
- J Raabe
- Swiss Light Source, Paul Scherrer Institut, Villigen-PSI, Switzerland.
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Feifel R, Velkov Y, Carravetta V, Angeli C, Cimiraglia R, Sałek P, Gel'mukhanov F, Sorensen SL, Piancaśtelli MN, De Fanis A, Okada K, Kitajima M, Tanaka T, Tanaka H, Ueda K. X-ray absorption and resonant Auger spectroscopy of O2 in the vicinity of the O 1s-->sigma* resonance: experiment and theory. J Chem Phys 2008; 128:064304. [PMID: 18282035 DOI: 10.1063/1.2831920] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report on an experimental and theoretical investigation of x-ray absorption and resonant Auger electron spectra of gas phase O(2) recorded in the vicinity of the O 1s-->sigma(*) excitation region. Our investigation shows that core excitation takes place in a region with multiple crossings of potential energy curves of the excited states. We find a complete breakdown of the diabatic picture for this part of the x-ray absorption spectrum, which allows us to assign an hitherto unexplained fine structure in this spectral region. The experimental Auger data reveal an extended vibrational progression, for the outermost singly ionized X (2)Pi(g) final state, which exhibits strong changes in spectral shape within a short range of photon energy detuning (0 eV>Omega>-0.7 eV). To explain the experimental resonant Auger electron spectra, we use a mixed adiabatic/diabatic picture selecting crossing points according to the strength of the electronic coupling. Reasonable agreement is found between experiment and theory even though the nonadiabatic couplings are neglected. The resonant Auger electron scattering, which is essentially due to decay from dissociative core-excited states, is accompanied by strong lifetime-vibrational and intermediate electronic state interferences as well as an interference with the direct photoionization channel. The overall agreement between the experimental Auger spectra and the calculated spectra supports the mixed diabatic/adiabatic picture.
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Affiliation(s)
- R Feifel
- Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden.
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Kaznatcheev KV, Dudin P, Lavrentovich OD, Hitchcock AP. X-ray microscopy study of chromonic liquid crystal dry film texture. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:061703. [PMID: 18233857 DOI: 10.1103/physreve.76.061703] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2007] [Revised: 09/20/2007] [Indexed: 05/25/2023]
Abstract
Soft x-ray spectromicroscopy has been used to investigate the degree of the molecular alignment of sulfonated benzo[de]benzo[4.5]imidazo[2,1-a]isoquinoline[7,1], a lyotropic chromonic liquid crystal (LCLC). LCLC thin films cast from concentrated aqua solution (20%wt.) , aligned by shear flow and dried, show strong linear dichroism in their C-, N-, O-, S- K edge near edge x-ray spectra (NEXAFS). The carbon K edge has been used for quantitative evaluation of the orientational texture of the films at a submicron spatial scale. This has verified there is predominantly in-plane alignment of the LC director. To highlight the role of hydrophobic-hydrophilic interactions, two stereoisomers of the same dye has been synthesized with different positioning of terminal sulfonate groups, in the form of a mixture of isomers with sulfonate groups in 2,10 and 2,11 positions (Y104 compound) and in a 5,10-disulfo arrangement (Y105). Both compounds develop characteristic herringbone-type texture with similar domain sizes. Polarized optical microscopy and higher resolution x-ray microscopy show sinusoidal-like undulations of the molecular director, with occasional crisscross appearance. Such behavior is found to be consistent with earlier observation of striations, characteristic of the columnar phase. The drastic difference in the degree of undulation ( +/-15 degrees in Y104 and +/-7 degrees in Y105 films) and long period of undulation (approaching the film thickness) requires further analysis. It was also found that the degree of in-plane order within domains changes from 0.8 for Y104 to >0.9 in Y105 films.
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Affiliation(s)
- K V Kaznatcheev
- Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
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Nakata A, Imamura Y, Nakai H. Hybrid exchange-correlation functional for core, valence, and Rydberg excitations: core-valence-Rydberg B3LYP. J Chem Phys 2007; 125:64109. [PMID: 16942275 DOI: 10.1063/1.2227379] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The core-valence-Rydberg Becke's three-parameter exchange (B3)+Lee-Yang-Parr (LYP) correlation functional (CVR-B3LYP) is proposed as a means to improve descriptions of Rydberg excitations of core-valence B3LYP (CV-B3LYP). CV-B3LYP describes excitations from both core and occupied valence orbitals to unoccupied valence orbitals with high accuracy but fails to describe those to Rydberg orbitals. CVR-B3LYP, which adopts the appropriate portions of Hartree-Fock exchange for unoccupied valence and Rydberg regions separately, overcomes the disadvantage of CV-B3LYP. Numerical assessment confirms that time-dependent density functional theory calculations with CVR-B3LYP succeed in describing not only core excitations but also Rydberg excitations with reasonable accuracy.
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Affiliation(s)
- Ayako Nakata
- Department of Chemistry, School of Science and Engineering, Waseda University, Tokyo 169-8555, Japan
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Tivanski AV, Hopkins RJ, Tyliszczak T, Gilles MK. Oxygenated Interface on Biomass Burn Tar Balls Determined by Single Particle Scanning Transmission X-ray Microscopy. J Phys Chem A 2007; 111:5448-58. [PMID: 17542565 DOI: 10.1021/jp070155u] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbonaceous particles originating from biomass burning can account for a large fraction of organic aerosols in a local environment. Presently, their composition, physical and chemical properties, as well as their environmental effects are largely unknown. Tar balls, a distinct type of highly spherical carbonaceous biomass burn particles, have been observed in a number of field campaigns. The Yosemite Aerosol Characterization Study that took place in summer 2002 occurred during an active fire season in the western United States; tar balls collected during this field campaign are described in this article. Scanning transmission X-ray microscopy and near-edge X-ray absorption fine structure spectroscopy are used to determine the shape, structure, and size-dependent chemical composition of approximately 150 individual spherical particles ranging in size from 0.15 to 1.2 mum. The elemental composition of tar balls is approximately 55% atomic carbon and approximately 45% atomic oxygen. Oxygen is present primarily as carboxylic carbonyls and oxygen-substituted alkyl (O-alkyl-C) functional groups, followed by moderate amounts of ketonic carbonyls. The observed chemical composition, density, and carbon functional groups are distinctly different from soot or black carbon and more closely resemble high molecular weight polymeric humic-like substances, which could account for their reported optical properties. A detailed examination of the carboxylic carbonyl and O-alkyl-C functional groups as a function of particle size reveals a thin oxygenated interface layer. The high oxygen content, as well as the presence of water-soluble carboxylic carbonyl groups, could account for the reported hygroscopic properties of tar balls. The presence of the oxygenated layer is attributed to atmospheric processing of biomass burn particles.
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Affiliation(s)
- Alexei V Tivanski
- Chemical Science Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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Fu J, Urquhart SG. Effect of chain length and substrate temperature on the growth and morphology of n-alkane thin films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:2615-22. [PMID: 17266340 DOI: 10.1021/la0630007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and microscopy has been used to study the orientational morphology of thin films of the linear alkanes n-C36H74 and n-C60H122, prepared by vacuum deposition onto NaCl (001) surfaces at ambient and elevated substrate temperatures. The orientational morphology, specifically, the nature of domains with lateral and normal orientation, is explored as a function of the chain length and the substrate temperature. It is found that the longer n-C60H122 molecules are laterally oriented on the substrate surface within the investigated substrate temperatures but that the morphology of these thin films varies with substrate temperature. The shorter n-C36H74 molecules are partially laterally oriented at low substrate temperature and are completely normally oriented at high substrate temperature. The relative magnitude of "side-by-side" and "end-to-end" intermolecular interactions leads to the formation of highly ordered alkane structures with a high aspect ratio. The formation of complex, nanoscale orientational morphologies are rationalized by considering kinetic and thermodynamic effects, in particular, the relative enthalpic and entropic contributions to the free energy associated with the different molecular orientations.
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Affiliation(s)
- Juxia Fu
- Department of Chemistry, University of Saskatchewan, 110 Science Pl, Saskatoon, Saskatchewan, Canada S7N 5C9
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