Inorganic Chemsitry Seminar: Dr. Matthew Kieber-Emmons, University of Utah

April 23, 2019 - 12:00 PM - 01:00 PM
Dr. Matthew Kieber-Emmons Bioinspired Water Oxidation with Copper The thermodynamically challenging step in natural and artificial photosynthesis is the oxidation of water to dioxygen. Towards this end, we have identified a dinuclear copper water oxidation electrocatalyst which achieves high Faradaic efficiencies and moderate turnover rates. The catalyst partially dissociates in solution into a mononuclear species. A large kinetic isotope effect was observed, suggestive that initial oxidation of the dinuclear copper catalyst is rate limiting despite being energetically competitive with oxidation of the mononuclear copper species. These calculations further imply that mononuclear high-valent oxo pathways are not energetically viable. This lecture will present recent experimental and computational results on the mechanism of water oxidation by this catalyst and factors that direct the reaction landscape. Figure 1 Water oxidation proceeds via dinuclear rather than mononuclear intermediates. BIO: Matthew Kieber-Emmons received a BS in 2002 from Saint Joseph’s University in Philadelphia, PA. He pursued graduate studies with C. G. Riordan at the University of Delaware, receiving a PhD in 2007 studying oxygen and sulfur activation by monovalent nickel, and was an NIH Postdoctoral Fellow at Stanford University with Edward I. Solomon studying heme− copper oxidases and type III copper sites. He began a faculty appointment at the University of Utah in 2013, where his lab is broadly interested in mechanistic bioinorganic chemistry

Carol Lynch Lecture Hall

Chemsitry Complex

Host: Tomson

Title & Abstract: TBA


Department of Chemistry

231 S. 34 Street, Philadelphia, PA 19104-6323

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