NITROGENATED AROMATIC HETEROCYCLIC DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT USING SAME

摘要

A nitrogen-containing aromatic heterocyclic derivative in which a nitrogen atom of an indenocarbazole skeleton optionally having a hetero atom or an indenoindole skeleton optionally having a hetero atom is bonded to a dibenzofuran or a dibenzothiophene directly or indirectly. The derivative realizes an organic EL device with a high emission efficiency and a long lifetime.

主权项

1. An aromatic heterocyclic derivative represented by formula (1-1) or (1-2): wherein: ring A is represented by formula (1a) or (1b): ring carbon atoms C1 and C2, C3 and C4, C4 and C5, or C5 and C6 are shared with an adjacent ring; X represents NR5, CR6R7, SiR6R7, an oxygen atom, or a sulfur atom; each of W and Z independently represents a single bond, CR6R7, SiR6R7, an oxygen atom, or a sulfur atom; L1 represents a single bond, an arylene group comprising from 6 to 30 ring carbon atoms, or a heteroarylene group comprising from 5 to 30 ring atoms; each of R1 to R7 independently represents a linear or branched alkyl group comprising from 1 to 15 carbon atoms, a cycloalkyl group comprising from 3 to 15 ring carbon atoms, a substituted or an unsubstituted silyl group, an aryl group comprising from 6 to 30 ring carbon atoms, a heteroaryl group comprising from 5 to 30 ring atoms, a halogen atom, or a cyano group, or adjacent two groups of R1 to R7 are bonded to each other to from a saturated or an unsaturated divalent group which completes a ring; each of a, c and d independently represents an integer of 0 to 4; b represents an integer of 0 to 3; e represents an integer of 0 to 2; and Q represents a structure represented by formula (1c): wherein: Y represents an oxygen atom or a sulfur atom; L2 represents a single bond, an arylene group comprising from 6 to 30 ring carbon atoms, or a heteroarylene group comprising from 5 to 30 ring atoms, provided that when L2 is bonded to a carbon atom at 2-position of the structure represented by formula (1c), L2 represents an arylene group comprising from 6 to 30 ring carbon atoms or a heteroaryl group comprising from 5 to 30 ring atoms; each of R8 and R9 independently represents a linear or branched alkyl group comprising from 1 to 15 carbon atoms, a cycloalkyl group comprising from 3 to 15 ring carbon atoms, a substituted or an unsubstituted silyl group, an aryl group comprising from 6 to 30 ring carbon atoms, a heteroaryl group comprising from 5 to 30 ring atoms, a halogen atom, or a cyano group, or adjacent two groups of R8 and R9 are bonded to each other to from a saturated or an unsaturated divalent group which completes a ring; f represents an integer of 0 to 3; and g represents an integer of 0 to 4.