Application of N,N,N',N'-tetrasubstituted 1,3-bis(4-aminophenyl)azulenes to hole-injecting materials for durable organic EL devices without color fade

Oda M; Thanh NC; Ikai M; Kajioka T; Fujikawa H; Taga Y; Ogawa S; Shimada H; Kuroda S

Chemistry Letters, Vol.34, No.6, 754-755, 2005

DOI10.1246/cl.2005.754 Export Citation

Application of N,N,N',N'-tetrasubstituted 1,3-bis(4-aminophenyl)azulenes to hole-injecting materials for durable organic EL devices without color fade

Oda M, Thanh NC, Ikai M, Kajioka T, Fujikawa H, Taga Y, Ogawa S, Shimada H, Kuroda S

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.