Redox characteristics of manganese and cobalt complexes obtained from pyridine N-oxide.
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.
Groupe de Recherche en Energie et Information Biomoléculaires, Université du Québec à Trois-Rivères, Canada. hotchand@uqtr.uquebec.ca
S
S
Hotchandani
U
U
Ozdemir
S I
SI
Allakhverdiev
N
N
Karacan
V V
VV
Klimov
P V
PV
Kamat
R
R
Carpentier
D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry; D008345:Manganese / Q000737:chemistry*; D010084:Oxidation-Reduction; D011725:Pyridines / Q000737:chemistry*
D011725:Pyridines; D003035:Cobalt; D008345:Manganese; C013229:pyridine N-oxide