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合成了两类分别基于芘和蒽封端的芴-芳胺衍生物(FAn,FPy)的新型可溶液加工蓝色发光分子,两种材料均溶于常规的有机溶剂,并且可以旋涂成膜.通过紫外-可见光谱和荧光光谱对其在溶液中和固态薄膜下的光学性能进行了表征,发现这两类分子在固态下发射峰分别位于449和465 nm,属于蓝色发光材料.并通过循环伏安法表征了其电化学性能,计算得出FAn和FPy的最高占据分子轨道(HOMO)能级分别为-5.37和-5.36eV.结果表明N-己基二苯胺的引入有效阻止了分子在固态下的平面堆积,抑制了长波发射,并且提高了分子HOMO能级,改善了空穴注入能力.差示扫描量热法(DSC)和热重分析(TGA)测试表明这两类化合物均显示出良好的热稳定性,其中FAn的玻璃化转变温度和热分解温度分别达到了207和439℃.良好的性能使得这两类材料成为一种潜在的可溶液加工的蓝光材料.
Two new types of solution-processable blue luminescent molecules based on pyrene and anthracene-terminated fluorene-arylamine derivatives (FAn, FPy) were synthesized. Both materials were dissolved in conventional organic solvents and were spin-coated into films. Their optical properties under solution and in solid state films were characterized by ultraviolet-visible spectroscopy and fluorescence spectroscopy. The results show that the emission peaks of these two kinds of molecules are at 449 and 465 nm, respectively, which belong to the blue luminescent material. The electrochemical properties were characterized by voltammetry and the calculated highest occupied molecular orbital (HOMO) levels of FAn and FPy were -5.37 and -5.36eV, respectively. The results showed that the introduction of N-hexyl-diphenylamine effectively prevented the formation of , Which suppressed the long-wave emission and enhanced the HOMO energy level of the molecule and improved the hole injection ability.The DSC and TGA tests showed that both of these compounds showed Good thermal stability with FAn glass transition and thermal decomposition temperatures of 207 and 439 ° C, respectively, and the good properties make these two materials a potential solution-processable blue material.