摘要 : A poly(p-phenylenevinylene) derivative (PPV-TPA) and a series of statistical copolyfluorenes (PF-TPA) containing oxadiazole and triphenylamine segments along the main chain were synthesized by the Heck reaction and nickel-mediated... 展开 A poly(p-phenylenevinylene) derivative (PPV-TPA) and a series of statistical copolyfluorenes (PF-TPA) containing oxadiazole and triphenylamine segments along the main chain were synthesized by the Heck reaction and nickel-mediated coupling, respectively. The PF-TPA copolyfluorenes with relatively low contents of oxadiazole and triphenylamine units were readily soluble in common organic solvents, whereas the other copolyfluorenes displayed lower solubility. PPV-TPA showed excellent solubility in solvents such as tetrahydrofuran (THF), dichloromethane, chloroform, and toluene. Thin films of the polymers absorbed light in the range of 375-396 nm and had optical band gaps of 2.76-2.98 eV They emitted blue-green light with a maximum at 414-522 nm. The fluorescence quantum yields in THF solutions were 0.08-0.53. The copolyfluorene PF-TPA thin films with high contents of oxadiazole and triphenylamine moieties emitted pure blue light that remained stable even after annealing at 150 degrees C for 4 h in air. (c) 2006 Wiley Periodicals, Inc. 收起