Strongly medium dependent capability to exhibit not only prompt/delayed thermally-activated fluorescence but also aggregation-induced phosphorescence or exciplex emission is demonstrated either for solutions or for solid samples of acridan-based luminophores. Multicolour emissions of different nature were detected and studied for donor-acceptor derivatives of 2- or 4-(trifluoromethyl)benzene and 2,7-di-tert-butyl-9,9-dimethylacridine containing trifluoromethyl groups in ortho and para positions. For the demonstration of one of possible applications, both compounds were tested in the emissive layers of exciplex-based OLEDs. In the best case, their high maximum current, power and external quantum efficiences of 29.5 cd/A, 29.1 lm/W and 8.2% respectively were achieved for the device based on exciplex electroluminescence resulting from recombination of intermolecular charge transfer states formed on the interface of electron-donating and electron-accepting molecules used.

对于基于or啶基的发光体的溶液或固体样品，不仅显示出迅速/延迟的热激活荧光，而且还显示出聚集体诱导的磷光或激基复合物发射，具有很强的介质依赖性。检测和研究了2-或4-（三氟甲基）苯的供体-受体衍生物和邻位和对位含三氟甲基的2,7-二叔丁基-9,9-二甲基ac啶的不同性质的多色发射职位。为了演示一种可能的应用，两种化合物都在基于激基复合物的OLED的发光层中进行了测试。在最佳情况下，基于在界面上形成的分子间电荷转移态的重组而产生的激基复合物电致发光器件，其最大电流，功率和外部量子效率分别达到29.5 cd / A，29.1 lm / W和8.2％。所使用的给电子和受电子分子