1. CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, 31077 Toulouse Cedex 4, France, Fax: +33‐5‐61553003, http://www.lcc‐toulouse.fr/equipe_g/pages/poli/index.html
2. Université de Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
3. Celal Bayar University, Faculty of Sciences & Liberal Arts, Department of Chemistry, 45030 Muradiye‐Manisa, Turkey
4. Institut Universitaire de France, 103, bd. Saint‐Michel, 75005 Paris, France