Large angle X-ray scattering

A detailed investigation of the structure of amorphous PcRu by large-angle X-ray scattering (LAXS)269 showed that in the solid state dimeric species exist with a Ru-Ru distance in the magnitude of a double bond. Current experiments using the extended X-ray absorption fine structure (EXAFS) method confirm these results.279... 

The ordering of the anions in bmimX ionic liquids has also been suggested by our recent large-angle x-ray scattering experiment on liquid bmimi [23]. Figure 13 shows a differential radial distribution function obtained for liquid bmimi at room temperature. Clear peaks in the radial distribution curve are... 

Figure 13. Differential radial distribution function of liquid bmimi by large-angle x-ray scattering [23].

A recent QMCF MD and LAXS (large angle X-ray scattering) study [76] of the sulfate ion has once more demonstrated the reliability of this simulation technique for the description of composite solutes and an accuracy equivalent to best experimental methods. Precise predictions of vibrational spectra as well as the solvation energy of this anion [77] have clearly indicated the ability of the QMCF MD approach to investigate a variety of properties in a general and comprehensive way. 

Vchirawongkwin V, Persson I et al (2007) Structure and dynamics of sulfate ion in aqueous solution - an ab initio QMCF MD simulation and large angle X-ray scattering study. J Phys Chem B 111 4150... 

The following are our conclusions Large-angle X-ray scattering studies give us an accurate picture of structures up to 9 A. They do not allow the specification of defects, such as random ruptures of the chains. The structural models defined are strongly supported by magnetic measurements. 

A second piece of indirect evidence relating the 30 ppm peak in aluminosilicates to Al rather than Al species comes from large angle X-ray scattering (LAXS) experiments on aluminosilicate glasses (Schmiicker et al. 1999). The aluminium site occupancies of a number of glass compositions were determined from their Al NMR spectra and used to calculate the pair distribution function (PDF) profile which was... 

The structure of the bis(triphenylphosphine)gold(I) complex (193) in pyridine solution was examined by large angle X-ray scattering (LAXS). The bond distances (Au—P 0.2325 nm and Au to the six closest C atoms 0.344 nm) were in agreement with those found for the solid state complex. No coordination of Au with pyridine was observed260. 

X-ray Absorption Spectroscopy and Large Angle X-ray Scattering of Grignard Compounds... 

Despite numerous investigations of Grignard compounds, almost no information exists about inlra- and interatomic distances of these reagents in solution. This is not necessarily remarkable, since the methods of physical chemistry discussed in the previous section are of course not able lo provide such information. But X-ray absorption spectroscopy (EXAFS) and large angle X-ray scattering (LAXS) can. 

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