Aromatic amine derivative, organic electroluminescent element employing the same, and process for producing aromatic amine derivative

1. An aromatic amine derivative represented by general formula (A):

wherein

R 1 and R 2 are each independently selected from the group consisting of a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, and a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms;

A 1 , A 2 , A 3 and A 4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms,

however, a case where any substituent of each group represented by R 1 , R 2 , A 1 , A 2 , A 3 and A 4 comprises a vinyl group is excluded;

p, q, r and s each independently represents an integer of 1 to 5; when p represents an integer of 2 or greater, each of plural A 1 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when q represents an integer of 2 or greater, each of plural A 2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when r represents an integer of 2 or greater, each of plural A 3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; and when s represents an integer of 2 or greater, each of plural A 4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.

2. The aromatic amine derivative according to claim 1 , wherein at least one of p, q, r and s represents an integer of 2 or greater.

3. An aromatic amine derivative represented by general formula (A′):

wherein

R 1 ′ and R 2 ′ each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; excluding a case where both R 1 ′ and R 2 ′ are hydrogen atoms;

A 1 , A 2 , A 3 and A 4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms;

however, at least one of A 1 , A 2 , A 3 and A 4 bonds to meta-position of a bonding position where a nitrogen atom bonds;

further, a case where any substituent of each group represented by R 1 ′, R 2 ′, A 1 , A 2 , A 3 and A 4 comprises a vinyl group is excluded;

p, q, r and s each independently represents an integer of 1 to 5; when p represents an integer of 2 or greater, each of plural A l may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when q represents an integer of 2 or greater, each of plural A 2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when r represents an integer of 2 or greater, each of plural A 3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; and when s represents an integer of 2 or greater, each of plural A 4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.

4. An aromatic amine derivative represented by general formula (A″):

wherein

R 1 ′ and R 2 ′ each independently represents a hydrogen atom or an alkyl group selected from the group consisting of a methyl group, an ethyl group, a propyl group, and an isopropyl group; excluding a case where both R 1 ′ and R 2 ′ are hydrogen atoms;

A 1 , A 2 , A 3 and A 4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms;

however, when A 1 , A 2 , A 3 and A 4 all represent alkyl groups, a total sum made by adding numbers of carbon atoms in A 1 , A 2 , A 3 and A 4 does not exceed 10;

further, a case where any substituent of each group represented by R 1 ′, R 2 ′, A 1 , A 2 , A 3 and A 4 comprises a vinyl group is excluded;

p, q, r and s each independently represents an integer of 1 to 5; when p represents an integer of 2 or greater, each of plural A l may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when q represents an integer of 2 or greater, each of plural A 2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when r represents an integer of 2 or greater, each of plural A 3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; and when s represents an integer of 2 or greater, each of plural A 4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.

5. The aromatic amine derivative according to claim 1 , which is a doping material for an organic electroluminescence device.

6. An organic electroluminescence device which comprises:

at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrodes consisting of an anode and a cathode,

wherein at least one of the at least one organic thin film layer comprises the aromatic amine derivative according to claim 1 singly or as a component of a mixture.

7. The organic electroluminescence device according to claim 6 , wherein the at least one organic thin film layer comprises an organic layer having the aromatic amine derivative between the anode and the light emitting layer.

8. The organic electroluminescence device according to claim 6 , wherein the light emitting layer contains the aromatic amine derivative in an amount of 0.1 to 20% by weight.

9. The aromatic amine derivative according to claim 1 , wherein R 1 and R 2 are each independently selected from the group consisting of phenyl group, o-biphenyl group, 4-methylphenyl group, α,α-dimethylbenzyl group, 4-cyanophenyl group, 2-phenylethyl group, 1-naphthyl group, and 2-naphthyl group;

A 1 , A 2 , A 3 and A 4 are each independently selected from the group consisting of hydrogen atom, methyl group, t-butyl group, isopropyl group, n-propyl group, 2-butyl group, 2-naphthyl group, α,α-dimethylbenzyl group, phenyl group, trifluoromethyl group, and cyclohexyl group; and

p, q, r and s each independently represents an integer of 1 to 3, when any of p, q, r and s is 2 or 3, two A 1 , A 2 , A 3 or A 4 groups may bond each other to form butane-1,4-diyl group or propane-1,3-diyl group.

10. The aromatic amine derivative according to claim 3 , which is a doping material for an organic electroluminescence device.

11. An organic electroluminescence device which comprises:

at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrodes consisting of an anode and a cathode,

wherein at least one of the at least one organic thin film layer comprises the aromatic amine derivative according to claim 3 singly or as a component of a mixture.

12. The organic electroluminescence device according to claim 11 , wherein the at least one organic thin film layer comprises an organic layer having the aromatic amine derivative between the anode and the light emitting layer.

13. The organic electroluminescence device according to claim 11 , wherein the light emitting layer comprises the aromatic amine derivative in an amount of 0.1 to 20% by weight.

14. The aromatic amine derivative according to claim 4 , which is a doping material for an organic electroluminescence device.

15. An organic electroluminescence device which comprises:

at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrodes consisting of an anode and a cathode,

wherein at least one of the at least one organic thin film layer comprises the aromatic amine derivative according to claim 4 singly or as a component of a mixture.

16. The organic electroluminescence device according to claim 15 , wherein the at least one organic thin film layer comprises an organic layer having the aromatic amine derivative between the anode and the light emitting layer.

17. The organic electroluminescence device according to claim 15 , wherein the light emitting layer comprises the aromatic amine derivative in an amount of 0.1 to 20% by weight.