 MILWAUKEE SECTION
|
|
|||||||||||
| ||||||||||||
|
November 2008 Meeting
6:00 PM - Social Hour
Family Style Dinner(Prices include tax and gratuity)
For dinner reservations, please call
ABSTRACTUnderstanding activity and selectivity is central to understanding how catalysts operate. Since commercial catalysts are rather complex, our work focuses on well-characterized, generally single crystal model catalysts studied under ultrahigh vacuum. Strategies for understanding catalytic reaction pathways are illustrated by the gold- and gold-palladium alloy catalyzed synthesis of vinyl acetate monomer (VAM), which is synthesized industrially from ethylene, acetic acid and oxygen. It is shown that the reaction proceeds on pure palladium by a reaction between ethylene and surface acetate species to form an acetoxyethyl intermediate, which undergoes a ?-hydride elimination reaction to form VAM. The reaction pathways changes on the gold-palladium alloy and the origin of the change in reaction pathway will be discussed. Enantioselectivity is perhaps the most sensitive example of selectivity. Chiral catalysts can be synthesized by modifying them with chiral adsorbates. The relationship between the surface structure and enantioselectivity is explored by adsorbing chiral probe molecules on chirally modified surfaces.BIOGRAPHICAL SKETCH:Wilfred Tysoe is a Distinguished Professor of Chemistry at the University of Wisconsin-Milwaukee. He received his B.Sc. in Chemical Physics at the University of Manchester, England after which he spent a year teaching Chemistry and Physics in Ghana, Africa. He then obtained an M.Sc degree at the University of Sydney, Australia following which he held the position of Senior Scientist at the Plessey Company in England. He then went on to receive his Ph.D. degree in 1982 in Physical Chemistry at the University of Cambridge, England and worked as a post-doctoral researcher at the University of California, Berkeley, before moving to his present position at the University of Wisconsin-Milwaukee in 1984. His research interests focus on chemical properties at surfaces with particular emphasis on understanding catalytic reactions both in ultrahigh vacuum and under realistic conditions and in the area of tribology to understand the interplay between lubricant chemistry and the resulting frictional and wear properties of reactively formed tribological films. He is an Editor in Chief of Tribology Letters, which he co-founded about ten years ago. He is a member of the American Chemical Society, the American Vacuum Society and the Society for Tribologists and Lubrication Engineers (STLE), for which he serves on the publications committee and is a co-contributor to the ?Cutting Edge? column in the STLE magazine, Tribology and Lubrication Technology. He has published over 200 papers in scientific journals and presented over 200 talks.
MEETING FOLLOWUPThe Milwaukee Section enjoyed a pleasant evening of food and drink at Klemmer?s Banquet Hall while honoring our most recent Section Award winner, Dr. Wilfred T. Tysoe. Also in attendance were several past section award winners and 50- & 60-year ACS members.
|
|||||||||||
| HTML by: Holger Foersterling - holger@uwm.edu - April 01 2009 22:38:56. | ||||||||||||
Front row: Dimitri Gorjestani-?88, Jennifer Runquist-?02, Jung-Ja Kim-?99
Back row: David Petering-?06, Glenn Svoboda-?78, Doug Winquist (60-yr), Wilfred
Tysoe-?08, Daniel Haworth-?07