Aromatic amine derivative, and organic electroluminescent element containing same

An aromatic amine derivative represented by the following formula (1):

• [Z1nL1 (1)
• wherein Z1 is a group represented by the following formula (2);
• L1 is a linkage group, and may include one or more substituents;
• and
• n is an integer of 2 to 10:
• [Z2mL2 (2)
• wherein Z2 is a group represented by the following formula (3) or (3′);
• L2 is a linkage group, and may include one or more substituents;
• L1 in the formula (1) bonds to any of Z2 and L2;
• and
• m is an integer of 2 to 10:
• wherein in the formulas (3) and (3′),
• A is a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms or a group formed of plural rings;
• A′ is a single bond, a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms or a group formed of plural rings;
• B is a single bond, a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms or a group formed of plural rings;
• C is a single bond, a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms or a group formed of plural rings;
• P and Q are independently a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms, a group formed of plural rings or a group represented by the following formula (4) or (5);
• L2 in the formula (3) bonds to any of A, B, C, P and Q, and L2 in the formula (3′) bonds to A′;
• and
• k and l are independently an integer of 0 or 1, and k+l≦1:
• wherein in the formula (4), X is —O—, —S—, or —N(Ra)—, Ra is an atom or a group selected from a hydrogen atom, a substituted or unsubstituted linear or branched alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted linear or branched alkenyl group including 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 20 carbon atoms, a trialkylsilyl group of which the alkyl parts are each a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a triarylsilyl group of which the aryl parts are each a substituted or unsubstituted aryl group including 6 to 24 ring carbon atoms, an alkylarylsilyl group including a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms and a substituted or unsubstituted aryl group including 6 to 24 ring carbon atoms, a substituted or unsubstituted aryl group including 6 to 25 ring carbon atoms and a substituted or unsubstituted heteroaryl group including 5 to 24 ring atoms;
• R1 and R2 are independently an atom or a group selected from a substituted or unsubstituted linear or branched alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted linear or branched alkenyl group including 2 to 15 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 20 carbon atoms, a trialkylsilyl group of which the alkyl parts are each a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a triarylsilyl group of which the aryl parts are each a substituted or unsubstituted aryl group including 6 to 24 ring carbon atoms, an alkylarylsilyl group including a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms and a substituted or unsubstituted aryl group including 6 to 24 ring carbon atoms, a substituted or unsubstituted aryl group including 6 to 24 ring carbon atoms, a substituted or unsubstituted heteroaryl group including 5 to 24 ring atoms, a halogen atom and a cyano group, and adjacent plural R1s, adjacent plural R2s, and/or adjacent R1 and R2 may bond to each other to form a saturated or unsaturated ring;
• a and b are independently an integer of 0 to 3 and
• Q1 and Q2 are independently a group including 5 to 25 atoms which forms a saturated or unsaturated ring;
• in the formula (5), Ar1 and Ar2 are independently a substituted or unsubstituted aromatic hydrocarbon group including 6 to 25 ring carbon atoms or a substituted or unsubstituted aromatic heterocyclic group including 5 to 25 ring atoms, and at least one of Ar1 and Ar2 is a group formed of plural rings including 9 to 40 ring carbon atoms or a fused aromatic ring group including 10 to 25 ring carbon atoms.