Abstract
Abstract The title 1,3-bis(aminophenyl)azulenes were synthesized from 1,3-dihaloazulene in two steps involving the Suzuki cross-coupling with 4-bromophenylboronic acid and subsequent Pd-catalyzed amination. Their HOMO energy levels were estimated to be comparable to that of the widely used hole-injecting (HI) material, copper phthalocyanine. The application of these diamines to HL materials in organic electroluminescent (EL) devices was also studied as non-cyanine and non-polyamine substance.
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