1. Laboratory of Heteroatom Organic Chemistry, Faculty of Sciences of Bizerte, University of Carthage, 7021-Jarzouna, Tunisia
2. Department of Chemistry, University of Washington, BOX 351700, Seattle, WA 98195, USA
3. Laboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, Université de Carthage, 7021-Jarzouna, Tunisie