Evaluation of metal carbonyl derivatives of sulfur-containing quinones and hydroquinones as hydrogen-producing catalysts

INOR 803

Uzma I. Zakai, zakaiu@email.arizona.edu, Tori Moser, tmoser@email.arizona.edu, Greg A. N. Felton, greg_felton@hotmail.com, Takahiro Sakamoto, Jinzhu Chen, Aaron Vannuchi, Benjamin Petro, Richard S. Glass, rglass@u.arizona.edu, Dennis L. Lichtenberger, dlichten@u.arizona.edu, and Dennis H. Evans, dhevans@email.arizona.edu. Department of Chemistry, The University of Arizona, P O Box 210041, 1306 E. University Blvd., Tucson, AZ 85721-0041
Hydrogenases are a class of enzymes that catalyze the reversible reduction of protons to molecular hydrogen. Fe-only hydrogenases are particularly of interest because of their high turnover rates. Organometallic complexes that incorporate a redox ligand directly attached to a diiron core similar to that found at the active sites of Fe-only hydrogenases are anticipated to facilitate electron transfer to the diiron unit. Protonation in such complexes at the iron-iron bond coupled with electron transfer from the redox moiety may drive hydrogen production. Compound 1 was prepared by a photochemical [2+2] cycloaddition reaction and oxidized to 2, as reported previously. Electrochemistry, photoelectron spectroscopy, and theoretical calculations have been performed with 1 and 2 as well as with the known, control compound 3 to evaluate these organometallic complexes as potential hydrogen-producing catalysts

 

Organometallics
7:00 PM-10:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006