1. Laboratory of Molecular Chemistry, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh, Morocco
2. Chemistry Department, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
3. GREEnMat, CESAM Research Unit, Chemistry Department, University of Liège, Quartier Agora, 13 Allée du 6 Août, Liège 4000, Belgium
4. ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
5. Rasayan Inc., 2802 Crystal Ridge Road, Encinitas, CA 92024-6615, USA