Polyphenylenes and Poly(phenyleneethynylene)s with 9,10-Anthrylene Subunits
作者： Changduk Yang , Josemon Jacob , Klaus Müllen
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摘要: L'ght-emitting conjugated polyphenylenes and poly(phenyleneethynylene)s have been synthesized, which comprise of 9,10-linked anthracene repeat units with branched alkyl side-chains (2-octyldecyl) at the 2,6-positions p-terphenyl (P1), p-diethynylbenzene (P2), diphenylacetylene (P3) units. Both Sonogashira-Hagihara Suzukl-Miyauratype crosseoupling reactions under palladium catalysis were used as polycondensation methods. The side chains not only improve solubility resulting copolymers but also prevent stacking in solid state evident from almost identical PL spectra solution film. P1 P3 display pure blue emission while P2 exhibits green due to extended π-system along polymer backbone. All polymers possess high thennal stability shows best film-forming ability among three investigated. Furthermore, enhanced color this material is demonstrated by alrnost obtained on annealing 200 °C.
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