1. School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive,
Singapore 637551
2. Department
of Chemistry, University of Coimbra, Rua
Larga, 3004-535 Coimbra,
Portugal
3. Department of Physical
Chemistry,
Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, 221 00 Lund, Sweden