Extended X-ray Absorption Fine Structure Beamline Research Articles

X-ray Absorption Fine Structure Studies of Zirconium Complexes

Zirconium complexes derived with Schiff-base ligands take a central role in the expansion of coordination chemistry and have been receiving huge attention due to its pharmacological, dental and industrial characteristics. The present research paper deals with the characterization of Zirconium complexes with X-ray absorption spectroscopy (XAS) at Zirconium K-edge. Characterization was done at BL-9 EXAFS beamline available at Indus-2 synchrotron radiation source (2.5 GeV, 125 mA), Raja Ramanna Centre for Advanced Technology, Indore (M.P.), India. Both X-ray absorption near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) techniques were used to explore out the local environment around the Zirconium complexes. A computer software package IFEFFIT was used to analyze physical parameters. Edge width reveals that complexes have octahedral geometry and chemical shifts of complexes from zirconium metal reveals oxidation state of Zirconium in their complexes. The bond length of first coordinating shell of the complexes has been determined by Fourier transform method and compares this bond length with different methods.

The Spectroscopy Village at Diamond Light Source.

This manuscript presents the current status and technical details of the Spectroscopy Village at Diamond Light Source. The Village is formed of four beamlines: I18, B18, I20-Scanning and I20-EDE. The village provides the UK community with local access to a hard X-ray microprobe, a quick-scanning multi-purpose XAS beamline, a high-intensity beamline for X-ray absorption spectroscopy of dilute samples and X-ray emission spectroscopy, and an energy-dispersive extended X-ray absorption fine-structure beamline. The optics of B18, I20-scanning and I20-EDE are detailed; moreover, recent developments on the four beamlines, including new detector hardware and changes in acquisition software, are described.

EXAFS study of Fe (II) complexes using Dispersive EXAFS beamline

Extended X-ray absorption fine structure (EXAFS) spectra have been recorded at the K-edge of Fe (II) complexes using the energy dispersive EXAFS beam line at 2.5GeV Indus -2 synchrotron source at RRCAT, Indore, India. A theoretical EXAFS data analysis is also carried out by Fourier analysis of experimental EXAFS data of the two iron (II) complexes. This analysis includes details of the Fourier transform of the data and the extraction of metal-ligand bond length. Bond lengths determined from data analysis methods are compared with the bond lengths obtained from several other known existing techniques. These data have also been calibrated by derivative method and bond lengths have also been obtained from Fourier transformation method and the results have been compared with the each other. The EXAFS data have been analysed using the computer software Athena.