Patent ID: 7431997

Claim:
A phenylcarbazole compound of formula (1) below: wherein each of R 1 and R 2 is independently a hydrogen atom or a monosubstituted or polysubstituted functional group selected from the group consisting of a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 4 -C 30 heterocyclic group, a substituted or unsubstituted C 6 -C 30 condensed polycyclic group, wherein groups adjacent to R 1 and R 2 can bind and form a saturated or unsaturated cyclic hydrocarbon group, Ar is a phenyl group, a lower alkylphenyl group, a lower alkoxyphenyl group, a phenoxyphenyl group, a halophenyl group, a cyanophenyl group, a dicyanophenyl group, a (α,α-dimethylbenzene)phenyl group, a (N,N′-dimethyl)aminophenyl group, a (N,N′- diphenyl)aminophenyl group, a pentalenyl group, a indenyl group, a naphthyl group, a lower alkylnaphthyl group, a lower alkoxynaphthyl group a cyanonaphthyl group, a halonaphthyl group, an anthracenyl group, an azulenyl group, a heptalenyl group, an acenaphthylenyl group, a fluorenyl group, an anthraquinoyl group, a methylanthryl group, a phenanthryl group, a triphenylene group, a pyrenyl group, a chrysenyl group, an ethyl chrysenyl group, a picenyl group, a chloroperylenyl group, a pentaphenyl group, a pentacenyl group, a tetraphenylenyl group, a hexaphenyl group, a hexacenyl group, a rubicenyl group, a coronenyl group, a trinaphthylenyl group, a heptaphenyl group, a heptacenyl group, a phenanthrenyl group, a ovalenyl group, carbazoyl, lower alkyl carbazoly, biphenyl, lower alkylbiphenyl, lower alkoxybiphenyl, thiophenyl, indoyl or pyrridyl group, and R 4 is a hydrogen atom or has formula (2) below, where R 3 is a monosubstituted or polysubstituted functional group selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 4 -C 30 heterocyclic group, and a substituted or unsubstituted C 6 -C 30 condensed polycyclic group; and Ar is a substituted or unsubstituted C 6 -C 30 aryl group or a C 6 -C 30 heteroaryl group.