| Institution: | 1. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA), Fax: (+1)?847‐491‐1009 http://stoddart.northwestern.edu;2. These authors have contributed equally to the research described in this Communication.;3. Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (USA) http://www.its.caltech.edu/～heathgrp/;4. Laboratory of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (The Netherlands), Fax: (+31)?53‐489‐4645 |
