X-ray Absorption Fine Structure Studies of Zirconium Complexes

Abstract

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.