1. Department of Chemistry and Physics, Franklin College, Franklin, Indiana 46131, USA
2. Department of Chemistry, The University of Jordan, Amman 11942, Jordan
3. Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
4. Dipartimento di Chimica Industriale “Toso Montanari,” Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy