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