Extended X-ray absorption fine structure EXAFS analysis

X-ray imaging, selenium in, 22 101. See also Extended X-ray absorption fine structure (EXAFS) analysis X-ray imaging techniques, 16 504 X-ray imaging tests, 26 440 X-ray-induced X-ray emission, 24 109 X-ray instruments, 26 411... 

Because a monolayer-dispersed oxide or salt on a support with a highly specific surface usually is present in considerable quantity, the sensitivity of extended X-ray absorption fine structure (EXAFS) analysis is good... 

O Day, P.A. et al., Extended x-ray absorption fine structure (EXAFS) analysis of disorder and multiple-scattering in complex crystalline solids, J. Am. Chem. Soc., 116, 2938, 1994. 

The dimer (3) has been reported to react with calf thymus DNA [159]. Extended X-ray absorption fine structure (EXAFS) analysis of the platinated DNA revealed that the two platinum ions remained close to one another in the initially formed adduct (1 day incubation), but that over an extended period of time (8 day incubation) they separate from each other. In addition, compound (3) as well as its EtNH2 and Pr NH2 analogues, but not the hydrogen peroxide oxidation products of the complexes, are known to bind to and unwind supercoiled PM2-DNA (Peritz and Dabrowiak, unpublished data). 

O Day PA, Newville M, Neuhoff PS, Sahai N, Carroll SA (2000b) X-ray absorption spectroscopy of strontium(II) coordination I. Static and thermal disorder in crystalline, hydrated, and precipitated solids and in aqueous solution. J Colloid Interface Sci 222 184-197 O Day PA, Parks GA, Brown GE Jr (1994c) Molecular structure and binding sites of cobalt (II) surface complexes onkaolinite from X-ray absorption spectroscopy. Clays Clay Minerals 42 337-355 O Day PA, Rehr JJ, Zabinsky SI, Brown GE Jr (1994a) Extended X-ray Absorption Fine Structure (EXAFS) analysis of disorder and multiple-scattering in complex crystalline solids. J Am Chem Soc 116 2938-2949... 

The most straightforward case of electrostatic adsorption occurs with the most stable metal complexes such as platinum or palladium tetraammines, [(NH3)4Pt]+ and [(NH3)4Pd]+ or PTA and PdTAs, respectively. Over the wide pH and concentration ranges that can be employed during syntheses from the lab to the industrial scale, the relatively strongly bound ammine ligands of these coordination complexes remain intact. This has been most directly confirmed in the case of Pt by extended X-ray absorption fine structure (EXAFS) analysis of PTA solutions and adsorbed species [23], and for PdTAs less directly by XPS [24]. 

The general formula RuSe describes rathenium particles that are modified by a small amount of selenium the optimum activity is achieved for x 0.1. As obtained from anomalous small angle X-ray scattering (ASAXS) measurements, ruthenium forms almost spherical nanoparticles from which the selenium content is deposited onto the surface. The typical size of the rathenium particles is around 2.5 mn selenium forms small clusters on the surface with a diameter <0.6 nm. A mixing of the two components has not been observed. From extended X-ray absorption fine structure (EXAFS) analysis an oxygen-free selenium structure and oxygen-containing species on the uncovered rathenium surface... 

Extended X-ray absorption fine structure (EXAFS) analysis... 

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