1. Department of Chemical Sciences, Faculty of Science and Technology, Midlands State University, Private Bag 9055, Senga Road, Gweru 263, Zimbabwe
2. Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, Faculty of Science, University of Johannesburg, Kingsway Campus: C2 Lab 328, Auckland Park, Johannesburg 2006, South Africa
3. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
4. Materials Discovery Research Unit, Advanced Research Centre, Royal Scientific Society, Amman 11941, Jordan