1. Department of Chemistry, Northwestern University, 2045 Sheridan Road, Evanston, Illinois 60208, United States
2. BASF SE, Carl-Bosch-Strasse 38, Ludwigshafen am Rhein 67056, Germany
3. Polyurethane Systems Department, Performance Materials Division, BASF Corporation, 1609 Biddle Avenue, Wyandotte, Michigan 48192, United States