Determination of the differential structure factor of liquid bromobenzene by anomalous x-ray scattering

Abstract

Liquid bromobenzene (C6H5Br) has been studied with differential anomalous scattering to determine the differential structure factor of the Br atoms. The experiments were carried out at beam line W1 at the Hamburger Synchrotronlaboratorium (HASYLAB). The differential structure factor was checked by comparison with the theoretical intramolecular structure factor calculated from well-known data of the intramolecular geometry of C6H5Br. The differential radial distribution function shows a peak at 3.9 Å, which can be assigned to Br–Br atom pairs.

Corrosion of Mo in KOH: Time Resolved XAFS Investigations

“…In the past, X-ray diffraction (XRD) has proven to give detailed structural data of liquids (e.g , However, these measurements are very time-consuming, so that they cannot be used for the structural characterization of time dependent processes such as corrosion phenomena because the concentration c of the corroded species varies strongly with time. In addition, c is usually very low compared to the concentration of the anions and cations of the basic electrolyte, whereas highly concentrated samples are essential for the application of anomalous scattering techniques (see e.g., refs ,).…”

“…), especially if the anomalous scattering technique is applied, so that the contributions of different atomic pair correlation functions can be separated more easily. , However, these measurements are very time-consuming, so that they cannot be used for the structural characterization of time dependent processes such as corrosion phenomena because the concentration c of the corroded species varies strongly with time. In addition, c is usually very low compared to the concentration of the anions and cations of the basic electrolyte, whereas highly concentrated samples are essential for the application of anomalous scattering techniques (see e.g., refs ,). Furthermore, the corrosion products are inhomogeneously distributed in the liquid phase as a consequence of their formation at the electrode surface and their diffusion into the electrolyte, which further complicates the situation.…”

A new cell for temperature-dependent X-ray absorption spectroscopy of liquid solutions: application to PbBr2solutions in diethylene glycol

“…Schneider et al, 2003). In the past, X-ray diffraction (XRD), providing the contributions of all pair distribution functions of the sample, has proven to give detailed structural data of liquids also (see, for example, Palinkas & Kalman, 1981), especially if the anomalous scattering technique is applied, so that the contributions of the different atomic pair correlation functions can be separated more easily (Kortright et al, 1983;Schultz et al, 1990). However, such diffraction measurements are extremely time-consuming and highly concentrated samples are essential, especially for the application of anomalous scattering techniques (see, for example, Kortright et al, 1983;Schultz et al, 1990).…”