4.8 Article

Photocatalytic Water Oxidation: Tuning Light-Induced Electron Transfer by Molecular Co4O4 Cores

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 27, Pages 11104-11107

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja303951z

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Funding

  1. MIUR (FIRB Nanosolar) [RBAP11C58Y]
  2. University of Padova (PRAT) [CPDA104105/10]
  3. University of Padova (HELIOS) [STPD08RCX]
  4. Fondazione Cariparo (Nanomode Progetti di Eccellenza)

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Isostructural cubane-shaped catalysts [Co-4(III)(mu-O)(4)(mu-CH3COO)(4)(p-NC5H4X)(4)], 1-X (X = H, Me, t-Bu, OMe, Br, COOMe, CN), enable water oxidation under dark and illuminated conditions, where the primary step of photoinduced electron transfer obeys to Hammett linear free energy relationship behavior. Ligand design and catalyst optimization are instrumental for sustained O-2 productivity with quantum efficiency up to 80% at lambda > 400 nm, thus opening a new perspective for in vitro molecular photosynthesis

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