1. School
of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
2. KRISP, College of Health Sciences, University of KwaZulu-Natal, Westville, Durban 4001, South Africa
3. School
of Chemical Engineering, University of KwaZulu-Natal, Durban 4041, South Africa
4. CIBER-BBN,
Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
and Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain