1
|
Jana A, Jash M, Poonia AK, Paramasivam G, Islam MR, Chakraborty P, Antharjanam S, Machacek J, Ghosh S, Adarsh KNVD, Base T, Pradeep T. Light-Activated Intercluster Conversion of an Atomically Precise Silver Nanocluster. ACS NANO 2021; 15:15781-15793. [PMID: 34605625 DOI: 10.1021/acsnano.1c02602] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Noble metal nanoclusters protected with carboranes, a 12-vertex, nearly icosahedral boron-carbon framework system, have received immense attention due to their different physicochemical properties. We have synthesized ortho-carborane-1,2-dithiol (CBDT) and triphenylphosphine (TPP) coprotected [Ag42(CBDT)15(TPP)4]2- (shortly Ag42) using a ligand-exchange induced structural transformation reaction starting from [Ag18H16(TPP)10]2+ (shortly Ag18). The formation of Ag42 was confirmed using UV-vis absorption spectroscopy, mass spectrometry, transmission electron microscopy, X-ray photoelectron spectroscopy, infrared spectroscopy, and multinuclear magnetic resonance spectroscopy. Multiple UV-vis optical absorption features, which exhibit characteristic patterns, confirmed its molecular nature. Ag42 is the highest nuclearity silver nanocluster protected with carboranes reported so far. Although these clusters are thermally stable up to 200 °C in their solid state, light-irradiation of its solutions in dichloromethane results in its structural conversion to [Ag14(CBDT)6(TPP)6] (shortly Ag14). Single crystal X-ray diffraction of Ag14 exhibits Ag8-Ag6 core-shell structure of this nanocluster. Other spectroscopic and microscopic studies also confirm the formation of Ag14. Time-dependent mass spectrometry revealed that this light-activated intercluster conversion went through two sets of intermediate clusters. The first set of intermediates, [Ag37(CBDT)12(TPP)4]3- and [Ag35(CBDT)8(TPP)4]2- were formed after 8 h of light irradiation, and the second set comprised of [Ag30(CBDT)8(TPP)4]2-, [Ag26(CBDT)11(TPP)4]2-, and [Ag26(CBDT)7(TPP)7]2- were formed after 16 h of irradiation. After 24 h, the conversion to Ag14 was complete. Density functional theory calculations reveal that the kernel-centered excited state molecular orbitals of Ag42 are responsible for light-activated transformation. Interestingly, Ag42 showed near-infrared emission at 980 nm (1.26 eV) with a lifetime of >1.5 μs, indicating phosphorescence, while Ag14 shows red luminescence at 626 nm (1.98 eV) with a lifetime of 550 ps, indicating fluorescence. Femtosecond and nanosecond transient absorption showed the transitions between their electronic energy levels and associated carrier dynamics. Formation of the stable excited states of Ag42 is shown to be responsible for the core transformation.
Collapse
Affiliation(s)
- Arijit Jana
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | - Madhuri Jash
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | - Ajay Kumar Poonia
- Department of Physics, Indian Institute of Science Education, and Research Bhopal, Bhopal-462066, India
| | - Ganesan Paramasivam
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | - Md Rabiul Islam
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | - Papri Chakraborty
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | - Sudhadevi Antharjanam
- Sophisticated Analytical Instruments Facility (SAIF), Indian Institute of Technology, Madras, Chennai-600036, India
| | - Jan Machacek
- Department of Synthesis, Institute of Inorganic Chemistry, The Czech Academy of Science, 1001 Husinec-Rez, 25068 Rez, Czech Republic
| | - Sundargopal Ghosh
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| | | | - Tomas Base
- Department of Synthesis, Institute of Inorganic Chemistry, The Czech Academy of Science, 1001 Husinec-Rez, 25068 Rez, Czech Republic
| | - Thalappil Pradeep
- DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India
| |
Collapse
|
2
|
Chen B, Pärschke EM, Chen WC, Scoggins B, Li B, Balasubramanian M, Heald S, Zhang J, Deng H, Sereika R, Sorb Y, Yin X, Bi Y, Jin K, Wu Q, Chen CC, Ding Y, Mao HK. Probing Cerium 4 f States across the Volume Collapse Transition by X-ray Raman Scattering. J Phys Chem Lett 2019; 10:7890-7897. [PMID: 31815485 DOI: 10.1021/acs.jpclett.9b02819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Understanding the volume collapse phenomena in rare-earth materials remains an important challenge due to a lack of information on 4f electronic structures at different pressures. Here, we report the first high-pressure inelastic X-ray scattering measurement on elemental cerium (Ce) metal. By overcoming the ultralow signal issue in the X-ray measurement at the Ce N4,5-edge, we observe the changes of unoccupied 4f states across the volume collapse transition around 0.8 GPa. To help resolve the longstanding debate on the Anderson-Kondo and Mott-Hubbard models, we further compare the experiments with extended multiplet calculations that treat both screening channels on equal footing. The results indicate that a modest change in the 4f-5d Kondo coupling can well describe the spectral redistribution across the volume collapse, whereas the hybridization between neighboring atoms in the Hubbard model appears to play a minor role. Our study helps to constrain the theoretical models and opens a promising new route for systematic investigation of volume collapse phenomena in rare-earth materials.
Collapse
Affiliation(s)
- Bijuan Chen
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Ekaterina M Pärschke
- Department of Physics , University of Alabama at Birmingham , Birmingham , Alabama 35294 , United States
| | - Wei-Chih Chen
- Department of Physics , University of Alabama at Birmingham , Birmingham , Alabama 35294 , United States
| | - Brandon Scoggins
- Department of Physics , University of North Georgia , Dahlonega , Georgia 30533 , United States
| | - Bing Li
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | | | - Steve Heald
- Advanced Photon Source, Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Jianbo Zhang
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Hongshan Deng
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Raimundas Sereika
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Yesudhas Sorb
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Xia Yin
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Yan Bi
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Ke Jin
- National Key Laboratory of Shock Wave and Detonation Physics , Institute of Fluid Physics, CAEP , Mianyang 621900 , China
| | - Qiang Wu
- National Key Laboratory of Shock Wave and Detonation Physics , Institute of Fluid Physics, CAEP , Mianyang 621900 , China
| | - Cheng-Chien Chen
- Department of Physics , University of Alabama at Birmingham , Birmingham , Alabama 35294 , United States
| | - Yang Ding
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
| | - Ho-Kwang Mao
- Center for High-Pressure Science & Technology Advanced Research , Beijing 100094 , P.R. China
- Geophysical Laboratory , Carnegie Institution of Washington , Washington , D.C . 20015 , United States
| |
Collapse
|
3
|
Junqueira GMA. Remarkable aromaticity of cobalt bis(dicarbollide) derivatives: a NICS study. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2272-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
4
|
Shen G, Mao HK. High-pressure studies with x-rays using diamond anvil cells. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:016101. [PMID: 27873767 DOI: 10.1088/1361-6633/80/1/016101] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Pressure profoundly alters all states of matter. The symbiotic development of ultrahigh-pressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.
Collapse
Affiliation(s)
- Guoyin Shen
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC, USA
| | | |
Collapse
|
5
|
Sahle CJ, Sternemann C, Giacobbe C, Yan Y, Weis C, Harder M, Forov Y, Spiekermann G, Tolan M, Krisch M, Remhof A. Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)2. Phys Chem Chem Phys 2016; 18:19866-72. [PMID: 27389481 DOI: 10.1039/c6cp02495e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Using a combination of high resolution X-ray powder diffraction and X-ray Raman scattering spectroscopy at the B K- and Ca L2,3-edges, we analyzed the reaction products of Ca(BH4)2 after annealing at 350 °C and 400 °C under vacuum conditions. We observed the formation of nanocrystalline/amorphous CaB6 mainly and found only small contributions from amorphous B for annealing times larger than 2 h. For short annealing times of 0.5 h at 400 °C we observed neither CaB12H12 nor CaB6. The results indicate a reaction pathway in which Ca(BH4)2 decomposes to B and CaH2 and finally reacts to form CaB6. These findings confirm the potential of using Ca(BH4)2 as a hydrogen storage medium and imply the desired cycling capabilities for achieving high-density hydrogen storage materials.
Collapse
Affiliation(s)
- Christoph J Sahle
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France.
| | | | - Carlotta Giacobbe
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France.
| | - Yigang Yan
- Materials for Energy Conversion, Empa, Ch-8600 Dübendorf, Switzerland
| | - Christopher Weis
- Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany.
| | - Manuel Harder
- Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany. and Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Yury Forov
- Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany.
| | - Georg Spiekermann
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany and Deutsches GeoForschungsZentrum, Section 3.3, Potsdam, Germany
| | - Metin Tolan
- Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany.
| | - Michael Krisch
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France.
| | - Arndt Remhof
- Materials for Energy Conversion, Empa, Ch-8600 Dübendorf, Switzerland and Crystallography, Institute for Geo- and Environmental Science, Albert-Ludwigs-University Freiburg, D-79098 Freiburg im Breisgau, Germany
| |
Collapse
|
6
|
Wang HQ, Wang WY, Fang XY, Wang L, Zhu CL, Chen ZZ, Chen H, Qiu YQ. Second-order nonlinear optical responses of carboranyl-substituted indole/indoline derivatives: impact of different substituents. J Mol Graph Model 2016; 67:111-8. [DOI: 10.1016/j.jmgm.2016.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/29/2016] [Accepted: 05/03/2016] [Indexed: 11/30/2022]
|
7
|
Sahle CJ, Kujawski S, Remhof A, Yan Y, Stadie NP, Al-Zein A, Tolan M, Huotari S, Krisch M, Sternemann C. In situ characterization of the decomposition behavior of Mg(BH4)2 by X-ray Raman scattering spectroscopy. Phys Chem Chem Phys 2016; 18:5397-403. [PMID: 26818950 DOI: 10.1039/c5cp06571b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We present an in situ study of the thermal decomposition of Mg(BH4)2 in a hydrogen atmosphere of up to 4 bar and up to 500 °C using X-ray Raman scattering spectroscopy at the boron K-edge and the magnesium L2,3-edges. The combination of the fingerprinting analysis of both edges yields detailed quantitative information on the reaction products during decomposition, an issue of crucial importance in determining whether Mg(BH4)2 can be used as a next-generation hydrogen storage material. This work reveals the formation of reaction intermediate(s) at 300 °C, accompanied by a significant hydrogen release without the occurrence of stable boron compounds such as amorphous boron or MgB12H12. At temperatures between 300 °C and 400 °C, further hydrogen release proceeds via the formation of higher boranes and crystalline MgH2. Above 400 °C, decomposition into the constituting elements takes place. Therefore, at moderate temperatures, Mg(BH4)2 is shown to be a promising high-density hydrogen storage material with great potential for reversible energy storage applications.
Collapse
|
8
|
Kwon S, Wee KR, Cho YJ, Kang SO. Carborane dyads for photoinduced electron transfer: photophysical studies on carbazole and phenyl-o-carborane molecular assemblies. Chemistry 2015; 20:5953-60. [PMID: 24805274 DOI: 10.1002/chem.201304474] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/30/2014] [Indexed: 11/06/2022]
Abstract
o-Carborane-based donor-acceptor dyads comprising an o-carboranyl phenyl unit combined with N-carbazole (1) or 4-phenyl-N-carbazole (2) were prepared, and their dyad characters were confirmed by steady-state photochemistry and photodynamic experiments as well as electrochemical studies. The absorption and electrochemical properties of the dyads were essentially the sum of those of the carbazole and o-carboranyl phenyl units; this indicates negligible interaction between the carbazole and o-carborane units in the ground state. However, the emission spectra of 1 and 2 indicated that carbazole fluorescence was effectively quenched and a new charge-transfer (CT) emission was observed in solvents, varying from hexane to acetonitrile, which exhibited large Stoke shifts. The CT emission properties of o-carborane-based dyads were further analyzed by using Lippert-Mataga plots to show that unit charge separation occurred to form a charge-separated species in the excited state, namely, 1⋅2. This excited-state species was confirmed by nanosecond transient absorption spectra and spectroelectrochemical measurements; the photoexcitation of carbazole generated the CT state in which a radical cation and anion were formed at the carbazole and o-carborane units, respectively, within a few nanoseconds. DFT calculations corroborated the presence of this CT species and showed localized populations of the highest singly occupied molecular orbital on 2 in the reduced anionic state. As a result, molecular assemblies formed by linking the carbazole group with the o-carborane cage through a phenylene or multi-phenylene spacer revealed that the photoinduced electron-transfer process occurred intramolecularly.
Collapse
Affiliation(s)
- Soonnam Kwon
- Department of Advanced Materials Chemistry, Korea University, 2511 Sejong-ro, Sejong-City 339-700 (South Korea)
| | | | | | | |
Collapse
|
9
|
Theoretical study of nonlinear optical properties of cobalt bis (dicarbollide) derivatives: the effect of substituents. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1658-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
10
|
Substituent effects on molecular properties of dicarba-closo-dodecarborane derivatives. J Mol Model 2014; 20:2275. [PMID: 24935107 DOI: 10.1007/s00894-014-2275-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 04/24/2014] [Indexed: 10/25/2022]
Abstract
In this paper we study the role played by substituent effects on reactivity and NLO properties of ortho-, meta- and para- dicarba-closo-dodecarborane derivatives at B3LYP/6-31G(d,p) level of theory. In addition correlations with Hammett parameters of the substituents were established. In accordance with obtained results the reactivity properties of derivatives have not been significantly influenced by the isomer type, however the replaced para isomers were the most sensitive to NLO calculations. Moreover, the push-pull para isomers were found to be the most reactive and displayed the largest values of β tot and dipole moment.
Collapse
|
11
|
Bianchini M, Glatzel P. A tool to plan photon-in/photon-out experiments: count rates, dips and self-absorption. JOURNAL OF SYNCHROTRON RADIATION 2012; 19:911-919. [PMID: 23093749 DOI: 10.1107/s0909049512038551] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Accepted: 09/08/2012] [Indexed: 06/01/2023]
Abstract
A program that helps to plan experiments where the emitted X-rays are detected is presented. The tool is based on the standard formula for fluorescence-detected X-ray absorption spectroscopy and uses tabulated parameters to estimate count rates. The objective is to evaluate the feasibility of an experiment, estimate the influence of self-absorption on the spectral shape and investigate the possibility of range-extended EXAFS. The occurrence of `negative' edges, i.e. a decrease in the detected signal, is discussed.
Collapse
|
12
|
Junqueira G, Rocha L, Cotta V, César E. Solvent effects on reactivity properties of dicarba-closo-dodecarboranes isomers. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.04.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
13
|
Wee KR, Han WS, Cho DW, Kwon S, Pac C, Kang SO. Carborane Photochemistry Triggered by Aryl Substitution: Carborane-Based Dyads with Phenyl Carbazoles. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201109069] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Wee KR, Han WS, Cho DW, Kwon S, Pac C, Kang SO. Carborane photochemistry triggered by aryl substitution: carborane-based dyads with phenyl carbazoles. Angew Chem Int Ed Engl 2012; 51:2677-80. [PMID: 22298500 DOI: 10.1002/anie.201109069] [Citation(s) in RCA: 199] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Indexed: 11/07/2022]
Abstract
A bright combination: a new type of donor-acceptor dyad, carbazolylaryl-substituted ortho-carboranes, which are conveniently prepared from the corresponding acetylenes and decaborane pathways, showed unique excited-state behavior associated with electron transfer unlike the meta- and para-counterparts.
Collapse
Affiliation(s)
- Kyung-Ryang Wee
- Department of Materials Chemistry, Korea University, Chungnam, South Korea
| | | | | | | | | | | |
Collapse
|
15
|
Huotari S, Pylkkänen T, Soininen JA, Kas JJ, Hämäläinen K, Monaco G. X-ray-Raman-scattering-based EXAFS beyond the dipole limit. JOURNAL OF SYNCHROTRON RADIATION 2012; 19:106-113. [PMID: 22186651 DOI: 10.1107/s0909049511039422] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 09/26/2011] [Indexed: 05/31/2023]
Abstract
X-ray Raman scattering (XRS) provides a bulk-sensitive method of measuring the extended X-ray absorption fine structure (EXAFS) of soft X-ray absorption edges. Accurate measurements and data analysis procedures for the determination of XRS-EXAFS of polycrystalline diamond are described. The contributions of various angular-momentum components beyond the dipole limit to the atomic background and the EXAFS oscillations are incorporated using self-consistent real-space multiple-scattering calculations. The properly extracted XRS-EXAFS oscillations are in good agreement with calculations and earlier soft X-ray EXAFS results. It is shown, however, that under certain conditions multiple-scattering contributions to XRS-EXAFS deviate from those in standard EXAFS, leading to noticeable changes in the real-space signal at higher momentum transfers owing to non-dipole contributions. These results pave the way for the accurate application of XRS-EXAFS to previously inaccessible light-element systems.
Collapse
Affiliation(s)
- Simo Huotari
- Department of Physics, University of Helsinki, Helsinki, Finland.
| | | | | | | | | | | |
Collapse
|
16
|
Fister TT, Schmidt M, Fenter P, Johnson CS, Slater MD, Chan MKY, Shirley EL. Electronic structure of lithium battery interphase compounds: Comparison between inelastic x-ray scattering measurements and theory. J Chem Phys 2011; 135:224513. [DOI: 10.1063/1.3664620] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
17
|
Pylkkänen T, Lehtola J, Hakala M, Sakko A, Monaco G, Huotari S, Hämäläinen K. Universal Signature of Hydrogen Bonding in the Oxygen K-Edge Spectrum of Alcohols. J Phys Chem B 2010; 114:13076-83. [DOI: 10.1021/jp106479a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- T. Pylkkänen
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - J. Lehtola
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - M. Hakala
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - A. Sakko
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - G. Monaco
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - S. Huotari
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| | - K. Hämäläinen
- Department of Physics, POB 64, FI-00014 University of Helsinki, Finland, and European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
| |
Collapse
|
18
|
Rehr JJ, Kas JJ, Vila FD, Prange MP, Jorissen K. Parameter-free calculations of X-ray spectra with FEFF9. Phys Chem Chem Phys 2010; 12:5503-13. [DOI: 10.1039/b926434e] [Citation(s) in RCA: 810] [Impact Index Per Article: 57.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Gog T, Seidler GT, Casa DM, Upton MH, Kim J, Stoupin S, Nagle KP, Balasubramanian M, Gordon RA, Fister TT, Heald SM, Toellner T, Hill JP, Coburn DS, Kim YJ, Said AH, Alp EE, Sturhahn W, Yavas H, Burns CA, Sinn H. Momentum-resolved Resonant and Nonresonant Inelastic X-ray Scattering at the Advanced Photon Source. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/08940880903397009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
20
|
Zdetsis AD. Success and pitfalls of the Sin−2C2H2–C2Bn−2Hn isolobal analogy: Depth and breadth of the boron connection. J Chem Phys 2009; 130:064303. [PMID: 19222274 DOI: 10.1063/1.3071260] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
|
21
|
|
22
|
Minzer M, Bradley JA, Musgrave R, Seidler GT, Skilton A. A pressure cell for nonresonant inelastic x-ray scattering studies of gas phases. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:086101. [PMID: 19044382 DOI: 10.1063/1.2964106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report the design and performance of a gas-phase sample cell for measurements of momentum transfer (q) dependent nonresonant inelastic x-ray scattering (NRIXS). NRIXS measurements from He gas at 2 MPa (20 bars) readily demonstrate dipole-allowed and dipole-forbidden final states for two-electron excitations. Direct comparison of gas-phase NRIXS measurements with the corresponding nonresonant electron energy loss spectroscopy results (EELS) will be a valuable method for characterizing systematic errors in either technique for studies that require absolute normalization of the double differential cross section.
Collapse
Affiliation(s)
- M Minzer
- Physics Department, University of Washington, Seattle, Washington 98195, USA
| | | | | | | | | |
Collapse
|
23
|
Fister TT, Seidler GT, Shirley EL, Vila FD, Rehr JJ, Nagle KP, Linehan JC, Cross JO. The local electronic structure of α-Li3N. J Chem Phys 2008; 129:044702. [DOI: 10.1063/1.2949550] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
24
|
Fister TT, Seidler GT, Shirley EL, Vila FD, Rehr JJ, Nagle KP, Linehan JC, Cross JO. The local electronic structure of alpha-Li3N. J Chem Phys 2008. [PMID: 18681665 DOI: 10.1103/physrevb.79.174117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023] Open
Abstract
New theoretical and experimental investigations of the occupied and unoccupied local electronic densities of states (DOS) are reported for alpha-Li(3)N. Band-structure and density-functional theory calculations confirm the absence of covalent bonding character. However, real-space full-multiple-scattering (RSFMS) calculations of the occupied local DOS find less extreme nominal valences than have previously been proposed. Nonresonant inelastic x-ray scattering, RSFMS calculations, and calculations based on the Bethe-Salpeter equation are used to characterize the unoccupied electronic final states local to both the Li and N sites. There is a good agreement between experiment and theory. Throughout the Li 1s near-edge region, both experiment and theory find strong similarities in the s-and p-type components of the unoccupied local final DOS projected onto an orbital angular momentum basis (l-DOS). An unexpected, significant correspondence exists between the near-edge spectra for the Li 1s and N 1s initial states. We argue that both spectra are sampling essentially the same final DOS due to the combination of long core-hole lifetimes, long photoelectron lifetimes, and the fact that orbital angular momentum is the same for all relevant initial states. Such considerations may be generally applicable for low atomic number compounds.
Collapse
Affiliation(s)
- T T Fister
- Physics Department, University of Washington, Seattle, Washington 98195, USA
| | | | | | | | | | | | | | | |
Collapse
|