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SUMMARY:Oxo Metal Clusters in Water Splitting and Bond Activations
DTSTART:20260325T111500
DTEND:20260325T120000
DTSTAMP:20261008T102419Z
UID:972c7bdd872a1618a5c53592bc22a0737ff78d640fb3e0bbbca77474
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Don Tilley\nCollege of Chemistry\, UCBerkeley\, USA\nThe
  conversion of solar energy into a useful chemical fuel represents a major
  goal in the drive towards a society fully powered by renewable energy. Se
 veral potential fuels are of interest\, including hydrogen from proton red
 uction\, and various hydrocarbons from carbon dioxide reduction. To achiev
 e meaningful rates of fuel production\, the potential reduction reactions 
 must be coupled to an oxidative reaction that generates electrons and prot
 ons. The most reasonable candidate to provide these electrons and protons 
 is water\, which can be chemically decomposed to 4 protons\, 4 electrons\,
  and oxygen (the oxygen evolution reaction\, OER). For solar fuel applicat
 ions\, this water-splitting half reaction must be catalyzed to make it ene
 rgetically efficient\, as accomplished in nature's photosynthesis by a tet
 ra-manganese oxo cluster (the oxygen-evolving complex\, OEC). Indeed\, rel
 ated transition-metal oxo cubane clusters represent intriguing model syste
 ms and catalyst design motifs for development of new water-splitting catal
 ysts based on the most abundant metals. Molecularly derived catalysts of t
 his type offer a number of potential advantages\, including the synthetic 
 tunability of structure-activity relationships and chemical properties. Al
 so\, the study of model\, high-valent molecular species can provide key in
 sights into the mechanism of water oxidation\, and thereby help bridge the
  gap between solid-state and molecular systems to allow for more rational 
 design of catalysts. This presentation will describe high-valent tetracoba
 lt oxo cubane clusters\, and the experimental determination of a well-defi
 ned mechanism for cubane-catalyzed oxygen evolution via water oxidation. T
 he systematic variation of electronic properties for these clusters\, and 
 strategies for their stabilization\, will be described. The synthesis and 
 study of clusters doped by another transition metal\, and linked bis-cuban
 e complexes\, are further topics to be discussed.\n 
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495 https://epfl.
 zoom.us/j/66597274716?pwd=3aF3ty4ADQimEvabTqAcsFQJ0qvKK0.1
STATUS:CONFIRMED
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