Chalcogen Redox Chemistry in Molecules and Materials

Friday, August 20, 2021


Dr. Emily Y. Tsui

Department of Chemistry and Biochemistry

University of Notre Dame

Friday, August 20, 2021 at 3:30 p.m. in Hand Lab 1144

Abstract:
     Controlling the redox chemistry of chalcogens like sulfur and selenium is important for the synthesis of chalcogen-containing molecules and materials, and is also critical in biological signaling processes. Elemental sulfur can be activated for sulfane (S0) transfer reactions using aminothiol compounds and transition metal thiolate complexes to form organic polysulfide compounds and metal polysulfanido complexes respectively. These polysulfur compounds can release sulfur through redox reactions for transfer to unsaturated substrates. We also studied the surface chemistry of metal chalcogenide semiconductor nanocrystals by mimicking surface chalcogen sites using isolobal and isoelectronic metal carbonyl fragments. These organometallic species can be used as spectroscopic reporters of surface-centered redox processes as well as new functional reaction centers for new nanocrystal-promoted reactions.

Bio:
Emily Tsui received her undergraduate degree in chemistry from MIT, and completed her PhD in inorganic chemistry at Caltech. She was a postdoctoral researcher at the University of Washington, and joined the Department of Chemistry and Biochemistry at the University of Notre Dame in 2017.


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