1. Department of Chemistry, Tuskegee University, Tuskegee, Alabama 36088, United States
2. Department of Chemistry, Weber State University, Ogden, Utah 84408, United States
3. Department of Chemistry, Sonoma State University, Rohnert Park, California 94928, United States
4. Chemistry Department, Coe College, Cedar Rapids, Iowa 52402, United States
5. Department of Chemistry, Guilford College, Greensboro, North Carolina 27410, United States