1. Department of Chemistry; Salve Regina University; 100 Ochre Point Avenue Newport RI 02840 USA
2. Department of Chemistry; University of Connecticut; Storrs CT 06269 USA
3. Institute of Materials Science; University of Connecticut, Storrs; Connecticut 06269-3136 USA
4. Department of Surgery and Neag Cancer Center; University of Connecticut Health Center, Farmington; Connecticut 06030 USA
5. School of Chemistry; National University of Ireland at Galway; Galway Ireland