| Abstract [eng] |
Electroactive organic materials are employed in optoelectronic applications involving organic lightemitting diodes. Spirobifluorene, dimethylfluorene, phenylcarbazole, phenyldibenzofuran, and terthiophene were selected for new electroactive materials synthesis. The compounds were synthesized using Suzuki coupling reactions. The structures of the synthesized materials were confirmed by nuclear magnetic resonance spectroscopy and mass spectroscopy. The thermal characteristics of the synthesized materials were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). All the synthesized materials characterized by high thermal stability, with a decomposition temperature range of 430 °C to 483 °C at 5% weight loss, glass transition temperatures were recorded in the range of 120-183 °C. The cyclic voltammetry (CV) was used to estimate the ionization potentials of the synthesized materials. They exhibited comparable findings, varying from 5.38 to 6.28 eV. The synthesized spirobifluorene and dimethylfluorene core compounds show luminescence in the blue region, whereas the terthiophene core compounds emit light in the yellow region. The photoluminescence quantum yields of the thin film of spirobifluorene, dimethylfluorene, and terthiophene core compounds were up to 46%, and the photoluminescence quantum yields of the solutions of terthiophene core compounds were up to 90%.The technological scheme for the production of a dibenzofuranyl-disubstituted dimethylfluorene core compound was develop. |
