1. Faculty of Science, Department of Chemistry, Electrochemistry and Chemistry of Materials University of Dschang Dschang Cameroon
2. CNRS, CEISAM UMR 6230 Université de Nantes Nantes France
3. Institute of Inorganic Chemistry Christian‐Albrechts‐Universität zu Kiel Kiel Germany
4. Faculty of Science, Department of Chemistry, Laboratory of Analytical Chemistry University of Yaoundé 1 Yaoundé Cameroon