Twistacene-modified π-conjugated compounds usually possessing perfect molecular structure and tailorable optoelectronic property can decrease intramolecular and intermolecular π-stacking to a certain extent. Meanwhile, these branched macromolecules might be chosen as active layers for organic electronics. Following this direction, we design and synthesize two novel dendrimer compounds 1 and 2. Both of them emit strong blue and green fluorescence in organic solvents and thin film with high quantum yields. The fabricated OLED devices based on them showed the maximum brightness of 977 cd m⁻² for device-1 and 20175 cd m⁻² for device-2.

中文翻译：

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并四苯并修饰的π共轭化合物的有效电致发光

通常具有完善的分子结构和可调节的光电性能的并四苯并修饰的π-共轭化合物可以在一定程度上减少分子内和分子间的π-堆积。同时，这些支化的大分子可以被选作有机电子的活性层。按照这个方向，我们设计并合成了两种新型树状化合物1和2。它们都在有机溶剂和薄膜中以高量子产率发出强烈的蓝色和绿色荧光。基于它们制造的OLED器件对器件1的最大亮度为977 cd m ^-2，对器件²的最大亮度为20175 cd m ^-2。