to which four dendrons were connected. In addition, the photocyclization of the TPE core into the respective 9,10‐diphenylphenanthrene was facilitated when high‐generation dendrons were linked to the TPE core. Again, the photocycliztion reactivity increased in the following order: 11<12<13<14. We found that the fluorescence and photocyclization reactivity of TPE could be modulated by covalent interactions
合成和四个含有树枝状大分子tetraphenylethylenes体(TPE),表征1 1 - 1 4,合成,用含有4个OCH一个TPE化合物沿着2博士基团(被称为1 0用于比较)。光物理研究表明,TPE核心在将树枝状分子连接到其外围后开始发光。此外,当将高代树突连接到TPE核上时,荧光强度显着增强。荧光强度按以下顺序增加:1 1 < 1 2 < 1 3 < 1 4。暂时将该现象归因于与四个树突相连的TPE芯的内部旋转和扭转的能量屏障增加。此外,当将高代树突连接到TPE核上时,TPE核的光环化作用会促进各自的9,10-二苯基
菲。同样,光环化反应性按以下顺序增加:1 1 < 1 2 < 1 3 < 1 4。我们发现TPE的荧光和光环化反应性可以通过与树枝状分子的共价相互作用来调节,而这种调节强烈依赖于树枝状分子的生成。