1. Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
2. Membrane Biochemistry & Biophysics, Bijvoet Center for Biomolecular Research and Institute of Biomembranes, Utrecht University, Padualaan 8, Utrecht 3584 CH, the Netherlands
3. BASF SE, RAA/AC, E210, Carl-Bosch-Strasse 38, Ludwigshafen am Rhein 67056, Germany