1. a Departments of Chemistry & Biochemistry and Polymer Science , University of Southern Mississippi , Hattiesburg , MS , 39406-5043 , USA
2. b Laboratoire de Recherche sur les Polymeres , CNRS , UMR C7581, 2a8, rue Henri Dunant, 94320 , Thiais , France
3. c Chimie des Interactions Moleculaires , College de France , 11 Place Marcelin Berthelot, 75005 , Paris , France