Organic compound and electroluminescent device using the same

An electroluminescent device comprising a pair of electrodes and an organic compound layer interposed between said electrodes, said organic compound layer comprising an organic compound represented by the following general formula (1), (4) or (5):

• 83
• wherein X is a substituted or unsubstituted arylene group, said arylene group being selected from the group consisting of phenylene, biphenylene, terphenylene and fluorenylene groups, wherein three groups among Ar1, Ar2, Ar3, and Ar4 are each a substituted or unsubstituted fluorenyl group having one sp3 fluorene ring carbon, and the remainder is a substituted or unsubstituted aryl group
• 84
• wherein X is a substituted or unsubstituted arylene group, said arylene group being selected from the group consisting of phenylene, biphenylene, terphenylene and fluorenylene groups;
• Ar1 and Ar2 are each a substituted or unsubstituted aryl group;
• R1, R2, R3 and R4 are each independently a hydrogen or halogen atom, or a substituted or unsubstituted alkyl, alkoxyl, or aryl group;
• and R5 and R6 are each independently a hydrogen or halogen atom, a nitro or cyano group, or a substituted or unsubstituted alkyl, alkoxyl, aryl, or carbonyl group;
• 85
• wherein X is a substituted or unsubstituted arylene group, said arylene group being selected from the group consisting of phenylene, biphenylene, terphenylene and fluorenylene groups;
• R7, R8, R9, R10, R11, R12, R13, and R14 are each independently a hydrogen or halogen atom, or a substituted or unsubstituted alkyl, alkoxyl, or aryl group;
• each of R15, R16, R17 and R18 is independently a hydrogen or halogen, nitro or cyano, or a substituted or unsubstituted alkyl, alkoxyl, aryl, amino or carbonyl group.

An organic compound represented by the following general formula (4):

• 86
• wherein X is a substituted or unsubstituted arylene group, said arylene group being selected from the group consisting of phenylene, biphenylene, terphenylene and fluorenylene groups;
• Ar1 and Ar2 are each a substituted or unsubstituted aryl group;
• R1, R2, R3 and R4 are each independently a hydrogen or halogen atom, or a substituted or unsubstituted alkyl, alkoxyl, or aryl group;
• and R5 and R6 are each independently a hydrogen or halogen atom, a nitro or cyano group, or a substituted or unsubstituted alkyl, alkoxyl, aryl, or carbonyl group.