New route to conjugated polymer networks: synthesis of poly(4-ethynyl)phenylacetylene and its transformation into a conjugated network

摘要

The synthesis of linear conjugated polymers containing terminal ethynyl groups in pendant chains that allowed cross-linking reaction is reported. Discussed are (a) the selective catalytic polymerization of the monoprotected monomer HC C-C6H4-CqqC-Si1Pr3 (1) and the access to polyphenylacetylene polymer (2) containing silylated acetylenic pendant groups (b) the clean desilylation of 2 to generate the new polymer 3 carrying phenylacetylene groups in pendant chains, and (c) the thermal cross-linking reaction of these acetylenic groups, as a simple and very efficient way of accessing a conjugated polymeric network 4.