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

S. Hotchandani, U. Ozdemir, Suleyman Allakhverdiev, N. Karacan, V. V. Klimov, P. V. Kamat, R. Carpentier

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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. Copyright (C) 2000 Elsevier Science S.A.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalBioelectrochemistry and Bioenergetics
Issue number2
Publication statusPublished - Jun 1 2000
Externally publishedYes



  • Cobalt complex
  • Cyclic voltammetry
  • Manganese complex
  • Photosystem II (PS II)
  • Redox characteristics
  • Water oxidizing complex (WOC)

ASJC Scopus subject areas

  • Biophysics
  • Physical and Theoretical Chemistry
  • Electrochemistry

Cite this

Hotchandani, S., Ozdemir, U., Allakhverdiev, S., Karacan, N., Klimov, V. V., Kamat, P. V., & Carpentier, R. (2000). Redox characteristics of manganese and cobalt complexes obtained from pyridine N-oxide. Bioelectrochemistry and Bioenergetics, 51(2), 175-180.