Pidluzhna Anna, Vembris Aivars, Grzibovskis Raitis, Zommere Margarita Anna, Bezvikonnyi Oleksandr, Simokaitiene Jurate, Baronaite Melita, Volyniuk Dmytro, Grazulevicius Juozas V, Ali Amjad, Baryshnikov Glib, Ivaniuk Khrystyna, Starykov Hryhorii, Stakhira Pavlo
Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, LV-1063 Riga, Latvia.
Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko St. 59, LT-51423 Kaunas, Lithuania.
Molecules. 2024 Oct 17;29(20):4918. doi: 10.3390/molecules29204918.
A new family of symmetrical fluorene derivatives with different types of substituents attached to the C-2 and C-7 positions of the fluorene core synthesized by the Sonogashira coupling reactions is reported. The electronic structures and the properties of the compounds investigated by means of photoelectron emission spectroscopy, UV-Vis absorption and photoluminescent spectroscopy as well as by DFT and TD-DFT theoretical calculations are discussed. It is shown that the nature of substituents influences the π-conjugation of the molecules. No intermolecular charge transfer within the investigated wavelength range is observed. The applicability of the synthesized compounds in organic light-emitting diodes (OLEDs) based on exciplex emission is demonstrated. The advanced co-deposition technique with the tuned OLED architecture was applied and resulted in improved OLED parameters.
报道了通过Sonogashira偶联反应合成的一类新的对称芴衍生物，其芴核的C-2和C-7位连接有不同类型的取代基。讨论了通过光电子发射光谱、紫外-可见吸收光谱和光致发光光谱以及DFT和TD-DFT理论计算对这些化合物的电子结构和性质进行的研究。结果表明，取代基的性质影响分子的π共轭。在所研究的波长范围内未观察到分子间电荷转移。证明了合成化合物在基于激基复合物发射的有机发光二极管（OLED）中的适用性。应用了具有优化OLED结构的先进共沉积技术，从而改善了OLED参数。
