1. Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Belgium, Division of Chemistry and Biological Chemistry, Nanyang Technological University, 1 Nanyang Walk, Block 5, Level 3, Singapore 637616, Physical Chemistry and Applied Spectroscopy, Los Alamos National Laboratory, Mail Stop J576, Los Alamos, New Mexico 87545, Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, and Institute for Biological Information Processing I,...