| abstract |
An organic compound, a charge transport material, and an organic electroluminescent device using the organic compound having excellent hole transporting properties and electron transporting properties, and having excellent long-term electrical redox durability and high triplet excitation levels. The device has high luminous efficiency, high driving stability, and long lifetime.n n n The organic compound has two or more partial structures represented by the following formula (I) in one molecule:n n n n n n n n [Wherein, Cz is a carbazolyl group;n n n Z is a direct bond or any linking group;n n n N atoms present in one molecule are not conjugated except for N atoms in the same ring B 1 ;n n n There is only one pyridine ring present in one molecule;n n n Two or more Q's present in one molecule represent a direct bond that is linked to G in Formula II:n n n n n n n n [Wherein, ring B 1 is a 6-membered aromatic heterocycle having n N atoms as hetero atoms; n is an integer from 1 to 3; G, when connected by Q, is a direct bond or any linking group each connected by Q; G is an aromatic hydrocarbon group when it is not connected by Q; G is bonded to any C atom at the ortho and para positions of the N atom of ring B 1 ; Symbol m is an integer of 3 to 5]]. |