Highly emissive poly(aryleneethynylene)s containing 2,5-diboryl-1,4-phenylene as a building unit

A new type of emissive PAE materials was disclosed that contain a 2,5-diboryl-l,4-phenylene as the key building unit. Their excellent solution processability proves the significant utility of the newly prepared diarylboryl group, (HDMP)2B, for producing the soluble polymeric organoboron materials. All the produced polymers showed an intense emission not only in solution but also in the solid state. This study demonstrates the utility of the 2,5-diboryl-l,4- phenylene skeleton as a useful building block for emissive π-conjugated materials.