1. Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
2. Material Science, BASF SE, RGA/BM − B007, Carl-Bosch-Strasse 38, D-67056 Ludwigshafen, Germany
3. Department of Macromolecular Science and Engineering, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
4. BASF Corporation, 1609 Biddle Avenue, Wyandotte, Michigan 48192, United States