1. Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, United States
2. Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, United States
3. Department of Physical Sciences and Mathematics, Wayne State College, 1111 Main Street, Wayne, Nebraska 68787, United States
4. Department of Chemistry, Brock University, St. Catharines, Ontario L2S 3A1, Canada