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以吩噻嗪、芴酮为原料,通过亲核取代、Suzuki偶联等反应合成了三种新型吩噻嗪类衍生物(FMTPa、FMTPb、FMTPc),并研究了其光谱性质、电化学性质和热稳定性。结果表明:FMTPa、FMTPb和FMTPc的二氯甲烷稀溶液的紫外光谱相似,均出现三个吸收峰分别位于约259、375、452nm处;发射峰分别位于406.3、402.8、401.3nm,均属于深蓝色荧光;它们在二氯甲烷等常见有机溶剂中溶解性优良,可溶液加工成膜;循环伏安法检测表明,FMTPa、FMTPb和FMTPc的最高占有分子轨道(HOMO)能级分别为-5.33、-5.38、-5.44eV,与阳极氧化铟锡(ITO)的能级匹配,具有良好的空穴注入和传输性能;FMTPa、FMTPb和FMTPc的热分解温度均在300℃以上,热稳定性优良。FMTPa、FMTPb和FMTPc是一类具有潜在应用前景的兼具空穴传输性能、可溶液加工性能的深蓝色发光材料。
Three new phenothiazine derivatives (FMTPa, FMTPb, FMTPc) were synthesized by the reaction of nucleophilic substitution and Suzuki coupling with phenothiazine and fluorenone as raw materials. Their spectral properties, electrochemical properties and Thermal stability. The results showed that the UV spectra of FMTPa, FMTPb and FMTPc in dilute dichloromethane solution were similar, and the three absorption peaks appeared at about 259,375 and 452nm, respectively. The emission peaks were at 406.3, 402.8 and 401.3nm, respectively, The results of cyclic voltammetry showed that the highest occupied molecular orbitals (HOMO) of FMTPa, FMTPb and FMTPc were -5.33, respectively. 5.38 and -5.44 eV, respectively, which are compatible with the indium tin oxide (ITO), and have good hole injection and transport properties. The thermal decomposition temperatures of FMTPa, FMTPb and FMTPc are all above 300 ℃, and their thermal stability is excellent. FMTPa, FMTPb and FMTPc are potential applications of a dark blue luminescent material with both hole transport and solution processing properties.