229-240Three new phenanthroimidazole derivatives have been synthesised and their optical, electrochemical, and thermal properties evaluated with the purpose of using them for making of possible OLED materials. Synthesised compounds have fluorescence quantum yields up to 73%, robust thermal properties with high decomposition temperatures between 400 to 430°C and glass transition temperature of between 115 to 122°C. The delayed fluorescence observed is due to intra-molecular triplet to singlet energy transfer. The electrochemical properties together with optical properties and in particular the delayed fluorescence properties make them potential electron transporting cum blue emitting materials for OLEDs
