1. Chemistry Department, Drexel University, Philadelphia, PA 19104‐2875, USA
2. Chemistry Department, Howard University, Washington, DC 20059, USA
3. Department of Nuclear Chemistry, Eötvös Loránd University, Pázmány P. s 1/A, 1117 Budapest, Hungary
4. L.V. Pisarzhevskii Institute of Physical Chemistry, Ukrainian Academy of Sciences, Prospekt Nauki 31, Kiev, 03028 Ukraine
5. Department of Chemistry & Biochemistry, LaSalle University, Philadelphia, PA 19141, USA
6. Chemistry Department, Memorial University, St. John’s NFD, A1B 3X7 Canada