| abstract |
An organic compound and a charge-transporting material which each combines excellent hole-transporting properties with excellent electron-transporting properties and has excellent long-term resistance to electrical oxidation/reduction and a high triplet excitation level; and an organic electroluminescent element employing the organic compound. The element has a high luminescent efficiency, high operation stability, and a long life. The organic compound has per molecule two or more partial structures represented by the following formula (I). (I) Cz is carbazolyl. Z is a direct bond or any connecting group. The nitrogen atoms present in each molecule are not conjugated with each other, except for the nitrogen atoms present in the same ring B1. Only one pyridine ring is present per molecule. The two or more Q's present per molecule each represents a direct bond connected to G in the following formula (II). (II) Ring B1 is a 6-membered aromatic heterocycle having n nitrogen atom(s) as a heteroatom, provided that n is an integer of 1-3. When G is connected to Q, it is a direct bond or any connecting group which each is connected to Q. When G is not connected to Q, it is an aromatic hydrocarbon group. G is bonded to any of the carbon atoms located in the ortho and para positions to a nitrogen atom of the ring B1. Symbol m is an integer of 3-5. |