Synthesis And Properties Of Phenyl-PPV With Side Oxadiazole Moiety And Poly(2,6-Anthracenevinylene)

Among the extensively studied conjugated polymers for light emitting devices,PPV derivatives are more important light-emitting polymers. Phenyl substituted PPVs(Ph-PPV) are good green light-emitting materials, but the imbalance of electron andhole transport influence their performances. Here we introduced oxadiazole moiety to theside-chain of Ph-PPV to enhance the electron transport properties. The luminescenceefficiency and luminescence brightness (1.33cd/A, 9400 cd/m~2) of the Ph-PPV withside oxadiazole moiety are much higher than non-oxadiazole Ph-PPV (0.70 cd/A,2300 cd/m~2), and these polymers emitted green light which unaffected by theintroduction of oxadiazole moiety.Anthracene has a rigidity and planar structure which shows high photoluminescenceand thermo-stability. The molecule forms whole conjugated structure shows highelectronic transmission ability and obtains high light-emitting efficiency, which made it to beexcellent light-emitting materials. We designed new soluble poly(2,6-anthracene vinylene) (PAV),and the structure and some properties were characterized by ~1H NMR, DSC and TGA and GPC.Both the PL and EL of PPV are bluish-green emitting, the molecular weight, luminescenceefficiency and brightness of which are obviously higher than the homo-polymers and thecopolymers consisted of 9, 10-anthracene vinylene reported. Finally, this work has provided a wayto synthesize the homo-polymers and the copolymers consisted of 2,6-anthracene vinylenemoieties.