Redox characteristics of manganese and cobalt complexes obtained from pyridine N-oxide

Hotchandani S., Ozdemir Ü. , Allakhverdiev S., Karacan N. , Klimov V., Kamat P., ...More

BIOELECTROCHEMISTRY, vol.51, no.2, pp.175-180, 2000 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 2
  • Publication Date: 2000
  • Doi Number: 10.1016/s0302-4598(00)00068-4
  • Title of Journal : BIOELECTROCHEMISTRY
  • Page Numbers: pp.175-180


Manganese and cobalt complexes, using pyridine N-oxide as ligand, have been synthesized, and their cyclic and square-wave voltammetric measurements have been carried out. The results reveal that the complexes exhibit different voltammetric pattern, which suggests that the redox processes are most probably metal-centered. In both complexes, extra redox activity is observed once the potential exceeds certain value of the voltage. The observation of an oxidation wave in manganese complex at + 0.75 V vs. Ag/AgCl or + 0.95 V vs. NHE strongly suggests that this complex can bring about oxidation of water and can, thus, serve as a synthetic analogue of water oxidizing complex (WOC) of PS II. (C) 2000 Elsevier Science S.A. All rights reserved.