Synthesis and Optical Properties of Poly[(2-alkoxy-5-methyl-1,3-phenylene­ethynylene)-alt-(1,3-phenyleneethynylene)]s

Abstract

A few examples of poly(m-phenyleneethynylene)s 6 and 9 have been synthesized via Heck-coupling reaction. With the aid of the model compound, the optical band structures of the electronic absorption and emission spectra have been characterized by using UV-Vis and fluorescence spectroscopy at variable temperatures. While both polymers 6 and 9 are blue-emitting in the solid state, the solution quantum efficiency of the former (φ_fl ≈ 0.34) is about twice as higher as that of the latter (φ_fl ≈ 0.15).

poly(m-phenyleneethynylene) - low temperature spectroscopy - π-conjugated polymers

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