1. Centro de Química Estrutural; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
2. Department of Chemistry; Faculty of Science; Helwan University; Ain Helwan 11795 Cairo Egypt
3. Faculty of Chemistry; University of Wrocław; Ul. F. Joliot-Curie 14 50-383 Wrocław Poland