A new method of preparing poly(phenylenethynylenes)

A series of new phenylated poly(phenylenes) containing ethynylene groups in the backbone was synthesized by the interaction of bis(ethynyls) with bis(triphenylcyclopentadienone)arylenes according to the Diels-Alder reaction. The produced polymers were characterized by FTIR and 1 H and 19 F NMR spectroscopy, as well as by TGA, TMA, and DSC methods. All polymers exhibit an excellent thermal stability and strongly fluoresce with maxima in the range from 530 to 580 nm.