1. Department of Chemistry, University of Ilorin, Ilorin, Nigeria
2. Department of Chemistry, Centre for Supramolecular Chemistry Research, University of Cape Town, Cape Town, South Africa
3. Department of Microbiology, University of Ilorin, Ilorin, Nigeria
4. Department of Chemistry, University of Uyo, Uyo, Nigeria
5. Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa