[1] Department of Chemical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
[2] Department of Chemistry, Western Michigan University, Kalamazoo, MI 49008, United States
[3] University of Texas, Austin, TX, United States
[4] University of Illinois, Urbana-Champaign, IL, United States
[5] Division of Chemistry, Free Radical Chemistry Section, National Research Council, Ottawa, Ont., Canada