Results 231 to 240 of about 11,563 (263)
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Synchrotron Radiation News, 2011
A commercial catalyst has to be able to perform multiple functions, including: (i) enable the catalytic chemistry via an active site(s); (ii) allow the feed to reach the active site, and the products to diffuse out; (iii) be able to be manufactured on a cost-effective basis; and (iv) be able to be handled for transportation and loading/unloading into ...
Simon R. Bare +2 more
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A commercial catalyst has to be able to perform multiple functions, including: (i) enable the catalytic chemistry via an active site(s); (ii) allow the feed to reach the active site, and the products to diffuse out; (iii) be able to be manufactured on a cost-effective basis; and (iv) be able to be handled for transportation and loading/unloading into ...
Simon R. Bare +2 more
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Bulletin of the Chemical Society of Japan, 2014
Abstract A study using X-ray absorption fine structure (XAFS) spectroscopy in conjunction with chemical analyses was undertaken to determine the form of lead (Pb) compound(s) used as additives in plastic bags. Comparison of Pb LIII-edge X-ray absorption near-edge structure (XANES) in samples with those of the standards, and XANES ...
Anirban Das +2 more
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Abstract A study using X-ray absorption fine structure (XAFS) spectroscopy in conjunction with chemical analyses was undertaken to determine the form of lead (Pb) compound(s) used as additives in plastic bags. Comparison of Pb LIII-edge X-ray absorption near-edge structure (XANES) in samples with those of the standards, and XANES ...
Anirban Das +2 more
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Chemosphere, 2009
For an accurate assessment of immobilization technologies, it is necessary to illustrate the transformation of target metal species into their final products. The present study employed extended X-ray absorption fine structure (EXAFS) spectroscopy combined with linear combination fitting (LCF) to determine Pb species and their proportions in ...
Yohey, Hashimoto +3 more
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For an accurate assessment of immobilization technologies, it is necessary to illustrate the transformation of target metal species into their final products. The present study employed extended X-ray absorption fine structure (EXAFS) spectroscopy combined with linear combination fitting (LCF) to determine Pb species and their proportions in ...
Yohey, Hashimoto +3 more
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Inorganic Chemistry, 2007
Synchrotron techniques, X-ray-excited optical luminescence (XEOL) combined with X-ray absorption fine structures (XAFS), have been used to study the electronic structure and optical properties of a series of luminescent gold(I) complexes with diphosphine and bipyridine ligands using tunable X-rays (in the regions of the C and P K-edges and the Au L3 ...
Pil-Sook G, Kim +5 more
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Synchrotron techniques, X-ray-excited optical luminescence (XEOL) combined with X-ray absorption fine structures (XAFS), have been used to study the electronic structure and optical properties of a series of luminescent gold(I) complexes with diphosphine and bipyridine ligands using tunable X-rays (in the regions of the C and P K-edges and the Au L3 ...
Pil-Sook G, Kim +5 more
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Bulletin of the Chemical Society of Japan, 1999
Abstract X-Ray absorption fine structure (XAFS) studies were performed for cobalt(II) bromo complexes prepared for the ratio Br/Co from 0.0 to 4.0 and for their oxidized complexes with ozone in acetic acid solvent. The multivariate curve resolution method indicates the existence of two kinds of chemical species both before and after the ...
Toshio Akai +2 more
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Abstract X-Ray absorption fine structure (XAFS) studies were performed for cobalt(II) bromo complexes prepared for the ratio Br/Co from 0.0 to 4.0 and for their oxidized complexes with ozone in acetic acid solvent. The multivariate curve resolution method indicates the existence of two kinds of chemical species both before and after the ...
Toshio Akai +2 more
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Physical Review B, 2006
Metal impurities in the carbon nanotubes and carbon nanofibers play an important role in understanding their physical and chemical properties. We apply the Ni $K$-edge x-ray absorption fine structure analyses to the local electronic and geometric structures around embedded Ni impurities used as catalysts in a carbon nanofiber in combination with ...
Mayuko Ushiro +8 more
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Metal impurities in the carbon nanotubes and carbon nanofibers play an important role in understanding their physical and chemical properties. We apply the Ni $K$-edge x-ray absorption fine structure analyses to the local electronic and geometric structures around embedded Ni impurities used as catalysts in a carbon nanofiber in combination with ...
Mayuko Ushiro +8 more
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Contemporary Physics, 2011
Introduction to XAFS. A Practical Guide to X-ray Absorption Fine Structure Spectroscopy, by Grant Bunker, Cambridge, Cambridge University Press, 2010, 268 pp., £55.00 (hardback), ISBN 9780521767750...
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Introduction to XAFS. A Practical Guide to X-ray Absorption Fine Structure Spectroscopy, by Grant Bunker, Cambridge, Cambridge University Press, 2010, 268 pp., £55.00 (hardback), ISBN 9780521767750...
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Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids (ICDL'99) (Cat. No.99CH36213), 2003
Solvation structure of anthracene molecules and bromonaphthalene molecules doped in supercritical xenon fluids was studied on the basis of photoconductivity spectroscopy and X-ray absorption spectroscopy. It was concluded that values of ionization potential derived from photoconductivity measurements were sensitive for the association of xenon atoms ...
K. Nakagawa, T. Murata
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Solvation structure of anthracene molecules and bromonaphthalene molecules doped in supercritical xenon fluids was studied on the basis of photoconductivity spectroscopy and X-ray absorption spectroscopy. It was concluded that values of ionization potential derived from photoconductivity measurements were sensitive for the association of xenon atoms ...
K. Nakagawa, T. Murata
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Chemistry Letters, 2011
Abstract The in situ observation of a Wacker-type reaction system has been conducted by X-ray absorption fine structure (XAFS) analysis, revealing the ligand exchange on palladium from trifluoroacetato to alkene and reoxidation of a palladium/alkene complex by copper proceed in organic solvent.
Shin-ichi Okuoka +5 more
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Abstract The in situ observation of a Wacker-type reaction system has been conducted by X-ray absorption fine structure (XAFS) analysis, revealing the ligand exchange on palladium from trifluoroacetato to alkene and reoxidation of a palladium/alkene complex by copper proceed in organic solvent.
Shin-ichi Okuoka +5 more
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Proceedings of the 17thInternational Conference on X-Ray Absorption Fine Structure (XAFS 2018)
Radiation Physics and Chemistry, 2020Maciej Kozak +4 more
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