Abstract:A kind of phenylethynyl pendent decorated conjugated polymer, consisting of alternating fluorene and triphenylamine gorups, poly(9,9-dioctyl) 2,7-fluorene co-N-4-phenylethenyl-4,4'-tripheny-lamine(PFT-PE), was successfully synthesized via Suzuki coupling reaction. The chemical structure of PFT PE was verified by NMR and FT IR analyses. The polymer is highly soluble in common organic solvents, and exhibits good film forming ability and thermal stability. The optical bandgap of this polymer is 2.82 eV, as deduced by its absorption onset. The PL spectrum of PFT-PE′s film showed substantial red shift and broadening as relative to that of its THF solution, indicating the presence of intermolecular aggregation in solid state. The highest occupied molecular orbital (HOMO) level of PFT-PE is about -5.39 eV, as calculated by the oxidation onset of its CV curve. The highly reversible oxidation process indicates the good electrochemical stability PFT PE possesses. PFT-PE can be thermally cured without the addition of any initiator due to the substitution of phenylethynyl pendant.