1. Department of Chemical Sciences, Faculty of Natural Sciences, Redeemer's University, Ede, Osun State, Nigeria
2. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
3. Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
4. Department of Chemistry, Faculty of Science, University of Ibadan, Ibadan, Oyo State, Nigeria