POLY 7 |
| The use of metal-ligand binding as the driving force for the self-assembly polymerizations of a ditopic macromolecule offers a facile route to the preparation of linear metallo-supramolecular conjugated polymers as well as to cross-linked metallo-supramolecular conjugated polymer networks. We summarize our activities in this field and report on the polymerization of different conjugated macromonomers that were derived by end-capping low-molecular weight poly(p-2,5-dialkoxy phenylene ethynylene)s cores with 2,6-bis(1'-methyl-benzimidazolyl)pyridine (Mebip) ligands. The supramolecular polymerization of these macromonomers with equimolar amounts of Zn2+ or Fe2+ resulted in polymers, which exhibit appreciable mechanical strength, but due to their dynamic, reversible nature offer the ease of processing of low-molecular weight compounds. We also report on the investigation of organometallic networks, which are formed through ligand-exchange reactions between ligand sites comprised in the organic semiconductor and metallic cross-links. The available data indicate that cross-linking can have significant benefits for intermolecular charge transfer, if the polymers are carefully designed. |
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Metal-Containing and Metallo-Supramolecular Polymers and Materials
8:20 AM-11:35 AM, Sunday, August 19, 2007 Westin Boston Waterfront -- Stone, Oral
Division of Polymer Chemistry |