Two novel V-shaped push-pull systems based on a pyrimidine acceptor have been designed and investigated. Low-temperature measurements of the fluorescence and delayed luminescence spectra demonstrated that the emission bands of the compounds have a charge-transfer character.

Despite the fact that compounds in thermal vacuum deposition films have a low fluorescence quantum yield, OLED devices based on them show high efficiency, which can be associated with the emission mechanism through delayed fluorescence. It is found that photoproducts, obtaining upon exposure to UV-irradiation of fluorophores in chloroform solution, exhibit laser activity in the red region of the spectrum.

中文翻译：

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研究4,6-二（杂）芳基取代的嘧啶类化合物作为非掺杂OLED和激光染料的发射体

已经设计和研究了两种基于嘧啶受体的新型V形推挽系统。荧光和延迟发光光谱的低温测量表明，化合物的发射带具有电荷转移特性。

尽管热真空沉积膜中的化合物具有较低的荧光量子产率，但基于它们的OLED器件显示出高效率，这可以通过延迟荧光与发射机理相关联。发现在暴露于氯仿溶液中的荧光团的紫外线下获得的光产物在光谱的红色区域表现出激光活性。