X-Ray Spectral Studies of some Copper(II) Complexes of Schiff Base

School of Studies in Physics, Vikram University, Ujjain-456 010

Department of Physics, Government College, Neemuch-458 441

Department of Physics, Government Arts & Science College, Ratlam-457 001

Department of Chemistry, Faculty of Science, M. S. University, Vadodara-390 002

Manuscript received 24 October 1991, revised 4 February 1993, accepted 31 March 1993

X-Ray K-absorption spectra of one mononuclear and two binuclear tetradentate Schiff base copper(ll) complexes have been recorded. The observed edge-shifts, edge-widths and shift of the principal absorption maximum have been correlated with the nature of the bond, ionicity and other structural characteristics of the complexes. The X-ray absorption near edge structure (XANES) features have been observed in the absorption curves. The small absorption maximum appearing on the low energy side of the main peak A has been assigned the transition Is → 4s*. The band gap energies have also been estimated.