1. Department of Chemistry & Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy., DeKalb, Illinois 60115, United States
2. Department of Science & Mathematics, Coker College, 300 E. College Ave., Hartsville, South Carolina 29550, United States
3. Department of Chemistry & Biology, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada