1. Department of Chemistry and Petroleum Engineering and NSF-ERC Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, KS 66045 (fax: +1 785-864-4967; email: ascurto@ku.edu and bsubramaniam@ku.edu)
2. DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880-0304 (email: Keith.W.Hutchenson@usa.dupont.com)