Indexed on: 01 Aug '06Published on: 01 Aug '06Published in: Transition Metal Chemistry
A naringenin Schiff-base ligand (H3L) and its three complexes, MHL . nH2O (M = Zn and Cu, n = 0.5) and NiH2LOAc . 3.5H2O, have been synthesized and characterized on the basis of elemental analysis, molar conductivity and i.r. spectrum, 1H-n.m.r., u.v. spectra and thermal analyses. In addition, the suppression ratio for O2−˙ (a) and the suppression ratio for OH˙(b) were determined by the use of spectrophotometric methods. IC50(a) and IC50(b) of the complexes are given. The results show that compared to the ligand, the complexes exhibit high activity in the suppression of O2−˙ (a) and OH˙(b).