1. Department of Chemistry, Slippery Rock University, Slippery
Rock, Pennsylvania 16057, United States
2. Department of Chemistry, Shippensburg University, Shippensburg, Pennsylvania 17257-2200, United States
3. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48108-1005, United States
4. Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555-0001, United States