Organic luminescent medium and organic EL device

1. An organic electroluminescence device, comprising one or more organic thin film layers comprising a light emitting layer between a cathode and an anode, wherein at least one layer of the organic thin film layers comprises an organic luminescent medium comprising an anthracene derivative represented by formula (1-2):

wherein:

Ar 11 and Ar 12 each represent a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms, and at least one of Ar 11 and Ar 12 is substituted by a substituted or unsubstituted fluorenyl group; and

R 1 to R 8 each independently represent a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group.

2. The organic electroluminescence device of claim 1 , wherein the anthracene derivative is represented by formula (1-2-1):

wherein:

R 11 represents a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group; and

a represents an integer of 0 to 9, such that when a represents an integer of 2 or more, a plurality of R 11 's may be identical to or different from each other on condition that the two substituted or unsubstituted phenanthrenyl groups are identical to each other;

the position at which R 11 is bonded to each phenanthrenyl group is not limited; and

at least one of R 11 represents a substituted or unsubstituted fluorenyl group.

3. The organic electroluminescence device of claim 1 , wherein the anthracene derivative is represented by formula (1-2-2):

wherein:

R 11 represents a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group;

b represents an integer of 1 to 7, such that when b represents an integer of 2 or more, a plurality of R 11 's may be identical to or different from each other on condition that the two substituted or unsubstituted β-naphthyl groups are identical to each other;

the position at which R 11 is bonded to each β-naphthyl group is not limited; and

at least one of R 11 represents a substituted or unsubstituted fluorenyl group.

4. The organic electroluminescence device of claim 1 , wherein the anthracene derivative is represented by formula (1-2-3):

wherein:

R 11 represents a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group;

b represents an integer of 1 to 7, such that when b represents an integer of 2 or more, a plurality of R 11 's may be identical to or different from each other on condition that the two substituted or unsubstituted α-naphthyl groups are identical to each other;

the position at which R 11 is bonded to each α-naphthyl group is not limited; and

at least one of R 11 represents a substituted or unsubstituted fluorenyl group.

5. The organic electroluminescence device of claim 1 , wherein the anthracene derivative is represented by g formula (1-2-4):

wherein:

R 11 represents a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group;

b represents an integer of 1 to 7, such that when b represents an integer of 2 or more, a plurality of R 11 's may be identical to or different from each other on condition that the two substituted or unsubstituted α-naphthyl groups are identical to each other;

the position at which R 11 is bonded to each α-naphthyl group is not limited; and

Ar 6 represents a substituted or unsubstituted fluorenyl group.

6. The organic electroluminescence device of claim 1 , wherein the anthracene derivative is represented by formula (1-2-5):

where:

R 11 represents a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, or a hydroxyl group;

b represents an integer of 1 to 7, such that when b represents an integer of 2 or more, a plurality of R 11 's may be identical to or different from each other on condition that the two substituted or unsubstituted α-naphthyl groups are identical to each other;

the position at which R 11 is bonded to each α-naphthyl group is not limited; and

Ar 7 represents a substituted or unsubstituted fluorenyl group.

7. The organic electroluminescence device of claim 2 , wherein the anthracene derivative is represented by formula (1-2-6):

wherein:

Ar 5 represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted alkyl group having 1 to 50 ring carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms; and

Ar 6 represents a substituted or unsubstituted fluorenyl group, which may form a substituted or unsubstituted dibenzofluorenyl group together with the phenylene group substituted with Ar 5 .