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

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

BIOELECTROCHEMISTRY, cilt.51, sa.2, ss.175-180, 2000 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 2
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1016/s0302-4598(00)00068-4
  • Dergi Adı: BIOELECTROCHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.175-180
  • Anahtar Kelimeler: water oxidizing complex (WOC), photosystem II (PS II), cyclic voltammetry, redox characteristics, manganese complex, cobalt complex, WATER-OXIDIZING COMPLEX, PHOTOSYSTEM-II, CRYSTAL-STRUCTURE, OXIDATION, LIGANDS, OXYGEN, MODELS, PHOTOSYNTHESIS, CLUSTER, PLANTS
  • Gazi Üniversitesi Adresli: Evet

Özet

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.