Four structural asymmetric triarylamines were synthesized by diarylamines and 3,5-dimethyl-iodobenzene as the starting materials using Ullmann reaction. They are new compounds except the compound 1. The structures of the target compounds were characterized by IR, ¹H NMR, ¹³C NMR, HRMS and elemental analysis. The optical, electrochemical, and thermal properties were examined. The results indicated that the synthesized compounds emitted green fluorescence in chloroform, and exhibited a good electrochemical and thermal stability. The synthesized triarylamines are potential hole-transporting materials and green-light-emitting materials.

Key words: triarylamine, hole-transporting material, synthesis, property research