Synthesis and photophysical properties of novel butterfly-shaped blue emitters based on pyrene
作者:Xing Feng、Jian-Yong Hu、Hirotsugu Tomiyasu、Nobuyuki Seto、Carl Redshaw、Mark R. J. Elsegood、Takehiko Yamato
DOI:10.1039/c3ob41350k
日期:——
Using 1,3,5,9-tetrabromo-7-tert-butylpyrene as the bromide precursor, a series of novel butterfly-shaped 1,3,5,9-tetraaryl substituted pyrene derivatives were synthesized by the Suzuki–Miyaura cross-coupling reaction. Their thermal, photophysical, electrochemical and related properties were systematically investigated. All compounds were found to exhibit high thermal stabilities with decomposition temperatures (Td) of up to 300 °C. All compounds show highly blue fluorescence emissions in the spectral region of 412–469 nm in solution (Φf: 0.45–0.92) and 410–470 nm in the solid- state (Φf: 0.48–0.75). It is noteworthy that these butterfly-shaped pyrenes 4 possess low-lying HOMO levels ranging from −4.76 to −5.93 eV, which make them promising candidates in OLED applications.
以 1,3,5,9-四溴-7-叔丁基芘为溴化物前体,通过铃木-宫浦交叉偶联反应合成了一系列新型蝶形 1,3,5,9-四芳基取代芘衍生物。对它们的热学、光物理、电化学和相关性质进行了系统研究。研究发现,所有化合物都具有很高的热稳定性,分解温度(Td)高达 300 ℃。所有化合物在溶液(Φf:0.45-0.92)和固态(Φf:0.48-0.75)中的光谱区域 412-469 nm 和 410-470 nm 都显示出高度的蓝色荧光发射。值得注意的是,这些蝶形芘 4 具有-4.76 至 -5.93 eV 的低洼 HOMO 电平,因此很有希望应用于有机发光二极管。