The synthesis and photophysical properties of novel poly(diarylamino)styrenes

A series of novel diamines linked by varying conjugated bridges were characterized using FTIR, NMR and UV–visible spectroscopy, mass spectrometry and elemental analysis. The photoluminescence and thermal properties of the compounds were related to structure and quantum chemical calculations were employed to study the optimized ground state geometry of the compounds. The diarylamines exhibited blue to green fluorescence emission and displayed high thermal stability and high glass transition temperature. As such, the compounds might be very useful as hole-transporting materials in organic light-emitting diodes.