| 摘要 |
A conductive polymer comprises chains composed of resonant (aromatic and/or heterocyclic) rings in which conjugation extends from end to end of the molecule and cross-links between these chains which consist of aromatic groups conjugated to the chains that they link. In this way the polymer conducts from molecule to molecule and in principle may be isotropically conductive. Preferably, the polymer chains are selected from polyaniline, polypyrrole, polythiophene, poly-p-phenylene, poly-(p-phenylene sulfide) and poly-N-vinylcarbazole. The resonant groups may comprise carbocyclic or heterocyclic aromatic groups or pi -bonded aliphatic groups; p-phenylene groups and p-phenylene-vinylene groups are preferred. Such polymers can be made by a conjugative condensation reaction catalysed by a palladium compound. Three such condensation reactions are established and are named according to their respective authors as the Suzuki, Stille, and Heck reactions; the Suzuki reaction is preferred. |
