1. Contribution from the School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia, Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, Rudjer Boskovic Institute, 10002 Zagreb, Croatia, School of Natural Sciences-Chemistry, University of Newcastle upon Tyne, Bedson Building, Newcastle upon Tyne, NE1 7RU, United Kingdom, and ARC Centre of Excellence in Free Radical Chemistry and Biotechnology