Conjugated polymer nanoparticles based on fluorenes, PEGylated carbazoles and diphenylamines

Novel conjugated polymers containing fluorenes, PEGylated carbazoles and diphenylamines were synthesized by palladium catalyzed Suzuki-Miyaura cross-coupling reaction. The sizes of conjugated polymer nanoparticles were in a range of 35–65 nm observed by SEM analysis. The dense aggregation and strong entanglement of polymer with fluorenes and 3,6-linked carbazoles exhibit both red-shifted in fluorescence and absorption. The decreases in emission quantum yields on going from conjugated polymer solution to polymer nanoparticle dispersion were reflected the aggregation formation of polymer chains in the aqueous media.